TWI631867B - Inter-domain handover method and system for user equipment and relay gateway device - Google Patents

Abstract

A relay gateway device includes: a processor and a storage, wherein when a first mobile device and a second mobile device transmit packets and the second mobile device is replaced by a relay gateway device When the relay device is connected to another relay device, the network protocol address of the second mobile device is changed from an old network protocol address to a new network protocol address, and the first mobile device transmits the old network protocol address. When the first packet is a first packet to the second mobile device, the processor of the relay gateway device is configured according to the old network protocol address of the second mobile device in a list of the storage device and the new network protocol address. The old network protocol address that modifies the destination of the first packet is transmitted to the second mobile device after being the new network protocol address. In this way, a mechanism for seamlessly transmitting information after the second mobile device is changed hands can be achieved.

Description

Mobile device cross-domain handover method, system and relay gateway device

The present invention relates to a cross-domain handover method and system, and more particularly to a cross-domain handover method performed on a relay gateway device and applied to a mobile device.

At present, the mobile device between the base stations still needs to actively notify the base station through the mobile device, and whether the network address mapping table needs to be updated, so that the mobile device can directly or indirectly transmit data to other electronic devices. However, there are still problems such as triangular routing in the exchange between base stations.

It is one of the most important research topics to provide a mechanism for mobile devices to maintain seamless delivery of information after changing hands.

The present invention provides a mobile device cross-domain handover method, system and relay gateway device. When the mobile device performs a hand-over behavior between the relay gateway devices, the relay gateway device before the handover It will compare the composite information accessed by itself to determine whether to perform information conversion and modification of certain fields in the data packet to transmit the information packet to the destination mobile device, so that the mobile device can seamlessly transmit information when the mobile device changes hands. efficacy.

An embodiment of the present invention provides a mobile device cross-domain handover system, including a first relay gateway device and a second relay gateway device, and the first relay gateway device and the The second relay gateway device includes a first processor and a first storage device, and the second relay gateway device includes a second processor and a first a second storage device, wherein a first mobile device and a second mobile device perform packet transmission and the second mobile device is handed over by the first relay gateway device to the second relay gateway device, the system executing a The mobile device cross-domain handover method includes: the second processor determines the joining of the second mobile device; the second processor broadcasts a composite information of the second mobile device; the first processor is configured according to the second action The composite information of the device updates a first list of the first storage; wherein the composite information includes an identification code and a new network protocol address, and the identification code, the new network protocol address, and the first An old network protocol address of the second mobile device in the list corresponds to each other; wherein when the first mobile device transmits a first packet to the second mobile device, and the destination end of the first packet is the old network The first place when the address is agreed Modifying the old network protocol address of the destination end of the first packet into the new network according to the old network protocol address in the first list of the first storage and the new network protocol address The protocol address is transmitted to the second mobile device via the second relay gateway device.

An embodiment of the present invention provides a cross-domain handover method for a mobile device, which is implemented in a mobile device cross-domain handover system, the system includes a first relay gateway device and a second relay gateway device. a relay gateway device is directly or indirectly connected to the second relay gateway device, wherein a first mobile device and a second mobile device perform packet transmission and the second mobile device is configured by the first relay gateway device Transmitting to the second relay gateway device, the method comprising: the second relay gateway device determining the joining of the second mobile device; the second relay gateway device broadcasting a composite of the second mobile device And the first relay gateway device updates a first list of the first relay gateway device according to the composite information of the second mobile device; wherein the composite information includes an identification code and a new network protocol a location, and the identification code, the new network protocol address, and an old network protocol address of the second mobile device in the first list correspond to each other; wherein when the first mobile device transmits a first packet to The second mobile device and the One When the destination end of the packet is the old network protocol address, the first trunk gateway device modifies the first packet according to the old network protocol address in the first list and the new network protocol address. The old network protocol address of the destination end is transmitted to the second mobile device via the second relay gateway device after the new network protocol address.

An embodiment of the present invention provides a relay gateway device, including: a processor; and a storage device connected to the processor; wherein when a first mobile device and a second mobile device perform packet transmission and the second mobile device When the relay gateway device is handed over to another relay gateway device, a list of the storage device stores an identification code of the second mobile device, and the second mobile device is on the relay gateway device An old network protocol address and a new network protocol address of the second mobile device on the other relay gateway device, the identification code, the new network protocol address, and the old network protocol bit The addresses correspond to each other; wherein when the first mobile device transmits a first packet to the second mobile device and the destination end of the first packet is the old network protocol address, the processor is configured according to the second in the list The old network protocol address of the mobile device and the new network protocol address, the old network protocol address of the destination end of the first packet is modified to be the new network protocol address, and then transmitted to the second mobile device .

The invention provides a mobile device cross-domain handover method, system and relay gateway device. When a mobile device performs a hand-switching behavior between relay gateway devices, a composite information exchange is performed between the relay gateway devices. And performing the behavior of judging, comparing, establishing and updating the composite information, so that when the mobile device changes hands between the relay gateway devices and transmits the packet, the relay gateway device through which the packet passes determines whether or not to perform the data packet. Information conversion, correspondence and change of certain fields to transmit information packets to the destination mobile device to enable the mobile device to change hands and seamlessly transmit the packet.

In order to further understand the technology, method and effect of the present invention in order to achieve the intended purpose, reference should be made to the detailed description and drawings of the present invention. It is understood that the drawings are provided for purposes of illustration and description only and are not intended to limit the invention By.

1‧‧‧Mobile device cross-domain handover system

2~9‧‧‧Trunk gateway device

10‧‧‧Internet

11, 12‧‧‧ mobile devices

13‧‧‧ Processor

14‧‧‧Storage

S101, S103, S105, S107, S109‧‧‧ steps

1 is a schematic diagram of a cross-domain handoff system of a mobile device according to an embodiment of the present invention.

2 is a system block diagram of a relay gateway device according to an embodiment of the present invention.

FIG. 3 is a flowchart of a mobile device cross-domain handover method according to an embodiment of the present invention.

Various illustrative embodiments are described more fully hereinafter with reference to the accompanying drawings. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this invention will be in the In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Similar numbers always indicate similar components.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements or signals and the like, such elements or signals are not limited by the terms. These terms are used to distinguish one element from another, or a signal and another. In addition, as used herein, the term "or" may include all combinations of any one or more of the associated listed items.

Referring to FIG. 1 , the mobile device cross-domain handoff system 1 of the embodiment of the present invention includes a plurality of relay gateway devices 2 to 9 , and the relay gateway devices 2 to 9 are linearly connected to each other in sequence. The relay gateway devices 2 to 9 can be connected to the Internet 10, wherein the linear connection of the relay gateway devices 2 to 9 in sequence is not limited to the present invention, and the relay gateway devices 2 to 9 can also be directly connected to each other. Or indirectly connected. In addition, as shown in FIG. 2, each of the relay gateway devices 2 to 9 includes a processor 13 and a storage device 14, and each of the relay gateway devices 2 to 9 is through a continuous interface, such as LTE- D, Wi-Fi Direct, etc. are connected to other relay gateway devices, and each of the relay gateway devices 2 to 9 is connected through an access interface. The wireless access interface such as LTE, Wi-Fi, Zigbee, and Bluetooth is connected to the mobile device. At the same time, the memory of each of the relay gateway devices 2 to 9 includes a list for recording the behavior of the mobile device and its data packets according to operations such as maintenance, confirmation, comparison, establishment, and update.

As shown in FIG. 1, the mobile device 11 and the mobile device 12 perform data packet transmission under the domain of the relay gateway device 2. However, the mobile device 11 and the mobile device 12 may be different in the same domain. The data packet is transmitted under the domain, for example, the mobile device 11 and the mobile device 12 respectively perform data packet transmission in the relay gateway device 2 and the relay gateway device 3; the data packet transmission, for example, VoIP packet transmission, The list of the storage devices 14 of the relay gateway device 2 stores the network address of the mobile device 11 and the mobile device 12, so that the mobile device 11 transmits the mobile device 11 to the mobile device 12. The source network protocol address and the destination network protocol address of the mobile device 12, and the source network protocol address encapsulating the mobile device 12 and the mobile device in the data packet transmitted by the mobile device 12 to the mobile device 11. The destination network protocol address of the mobile device 11 and the mobile device 12 are bound to each other's network protocol address to facilitate the delivery of the data packet.

In one embodiment, the mobile device 11 and the mobile device 12 perform data packet transmission under the domain of the relay gateway device 2, and when the mobile device 12 is handed over by the relay gateway device 2 to the relay gateway device 3 Referring to FIG. 3, the mobile device cross-domain handover method of the mobile device cross-domain handover system according to the embodiment of the present invention includes the following steps: S101: The processor 13 of the relay gateway device 3 determines the action The addition of the device 12; S103: the processor 13 of the relay gateway device 3 broadcasts a composite message of the mobile device 12; S105: the processor 13 of the relay gateway device 2 updates the relay gateway according to the composite information of the mobile device 12. A list in the storage 14 of the device 2. It should be noted that the composite information of the mobile device 12 includes a new network protocol address and an identification code, and the identification code is a unique identification code representing the mobile device 12, and the identification code can be a media access control address (MAC Address). An International Mobile Equipment Identity (IMEI) or an international action An identifier (IMSI), wherein in addition to the network protocol address, a person skilled in the art may design the identification code as a unique identifier of the mobile device according to the system, such as the above-mentioned media access control address, international mobile device A unique identifier other than the identification code and the International Mobile User ID.

In steps S101 and S103, after the mobile device 12 is handed over by the relay gateway device 2 to the relay gateway device 3, the mobile device 12 triggers the processor 13 of the relay gateway device 3 to cause the relay gateway device 3 to The processor 13 learns that the mobile device 12 has entered its own domain to establish the composite information of the mobile device 12 in the list of storages 14 of the relay gateway device 3. The processor 13 of the relay gateway device 3 acquires the composite information of the mobile device 12 and broadcasts its composite information to other relay gateway devices.

In step S105, the processor 13 of the relay gateway device 2 receives the composite information of the mobile device 12 broadcast by the processor 13 of the relay gateway device 3, and the processor 13 of the relay gateway device 2 receives the action according to the reception. The composite information determining mobile device 12 of the device 12 is present in the list of the storage 14 of the relay gateway device 2, that is, the mobile device 12 was present under the domain of the relay gateway device 2, and according to the mobile device 12 The composite information, the processor 13 of the relay gateway device 2 updates the list of the storage 14 of the relay gateway device 2, as shown in Table 1, added to the list of the storage 14 of the relay gateway device 2 The new network protocol address of the mobile device 12 is such that the identification code, the new network protocol address, and the old network protocol address correspond to each other. It is to be noted that the processor 13 of the relay gateway device 2 determines that the mobile device 12 has existed under the domain of the relay gateway device 2 based on the identification code in the composite information of the mobile device 12. In this example, the processor 13 of the relay gateway device 2 includes the same identification code as the composite information of the mobile device 12 and the memory of the relay gateway device 2, such as a media access control address. Therefore, the processor 13 of the relay gateway device 2 judges that the mobile device 12 was present under the domain of the relay gateway device 2. In addition, the list of the memory 14 of the relay gateway device 2 originally includes the mobile device 12 identification code and the old network protocol address before the handover, and the processor of the relay gateway device 2 is based on the knowledge of the mobile device 12. The new network protocol address is updated in the list of the memory 14 of the relay gateway device 2, and the new network protocol address and the old network protocol address correspond to each other. In another example, the processor 13 of the relay gateway device 4 receives the composite information of the mobile device 12 broadcast by the processor 13 of the relay gateway device 3 and compares the composite information of the mobile device 12 with the relay gateway. The list of the storages 14 of the device 4 does not include the same identification code, so the processor 13 of the relay gateway device 4 determines that the mobile device 12 does not exist under the domain of the relay gateway device 2, and then relays the gate The processor 13 of the track device 4 broadcasts the composite information of the mobile device 12 to other relay gateway devices.

In an example, referring to FIG. 1 , the mobile device 11 and the mobile device 12 perform data packet transmission under the domain of the relay gateway device 2, and the mobile device 12 is handed over by the relay gateway device 2 to Relay gateway device 3. When the mobile device 11 transmits a packet including the old network protocol address as the destination to the mobile device 12, the processor 13 of the relay gateway device 2 is based on the old network in the list of the storage 14 of the relay gateway device 2. The route agreement address and the new network protocol address, the old network protocol address of the modification packet destination end is the new network protocol address, and then transmitted to the mobile device 12 via the relay gateway device 3, wherein the identification code in the list, The old network protocol address and the new network protocol address correspond to each other. When the mobile device 12 transmits a packet including the new network protocol address as the source to the mobile device 11, the processor 13 of the relay gateway device 2 is based on the old network in the list of the storage 14 of the relay gateway device 2. The road protocol address and the new network protocol address, the new network protocol address of the modified packet source is the old network protocol address, and then transmitted to the mobile device 11 via the relay gateway device 2, wherein the identification code of the mobile device 12 The old network protocol address and the new network protocol address correspond to each other.

In an example, the mobile device 11 and the mobile device 12 are in the relay gateway device 2 The data packet is transmitted under the domain, and the mobile device 12 is first changed by the relay gateway device 2 to the relay gateway device 3, and then the relay gateway device 3 is switched back to the relay gateway device 2. The processor 13 of the relay gateway device 2 determines the joining of the mobile device 12 and establishes the composite information (including the identification code and the new network protocol address) of the mobile device 12 in the list of the storage 14 of the relay gateway device 2. The processor 13 of the relay gateway device 2 determines that the identification code of the composite information of the mobile device 12 exists in the list of the storage 14 of the relay gateway device 2, and the processor 13 of the relay gateway device 2 is based on the mobile device. The composite information of 12 updates the list of the storages 14 of the relay gateway device 2, that is, the processing of the relay gateway device 2 based on the identification code of the mobile device 12 in the list of the storage devices 14 existing in the relay gateway device 2. The device 13 obtains the new network protocol address of the composite information of the mobile device 12 and deletes the new network protocol address after the old network protocol address of the mobile device 12 in the list of the storage device 14 of the relay gateway device 2, so that the new network protocol address is deleted. The mobile device 12 transmits the packet along the old network protocol address.

In another example, the mobile device 11 and the mobile device 12 perform data packet transmission under the domain of the relay gateway device 2 and the relay gateway device 3, respectively, and the mobile device 12 is changed by the relay gateway device 3. To the relay gateway device 4. The processor 13 of the relay gateway device 4 determines the joining of the mobile device 12 and establishes the composite information (including the identification code and the new network protocol address) of the mobile device 12 in the list of the storage 14 of the relay gateway device 4. The processor 13 of the relay gateway device 4 broadcasts the composite information of the mobile device 12, the processor 13 of the relay gateway device 3 receives the composite information of the mobile device 12, and the processor 13 of the relay gateway device 3 determines the mobile device. The composite information of 12 exists in the list of the storage 14 of the relay gateway device 3, and then according to the composite information of the mobile device 12, the processor 13 of the relay gateway device 3 updates the new network protocol address to the relay. In the list of storages 14 of the gateway device 3, the identification code of the mobile device 12, the new network protocol address and the old network protocol address correspond to each other.

Further, referring to FIG. 3 again, the mobile device cross-domain handover method of the mobile device cross-domain handover system of the embodiment of the present invention further includes the following steps: S107: processor of the relay gateway device 2 13Transfer a feedback message to the relay gateway The processor 13 of the third embodiment, wherein the feedback message includes the old network protocol address of the mobile device 12; S109: according to the feedback message, the processor 13 of the relay gateway device 3 updates or establishes the composite information of the mobile device 12 for relaying In the list of storages 14 of the gateway device 3, wherein the composite information of the mobile device 12 is updated, the identification code, the new network protocol address, and the old network protocol address are set to correspond to each other. In S109, it should be noted that if the relay gateway device 3 has established a list of mobile devices 12 before receiving the feedback message, the relay gateway device 3 may update the list according to the feedback message; The relay gateway device 3 does not establish a list of mobile devices 12 before receiving the feedback message, and the relay gateway device 3 can create a list based on the feedback message. In another embodiment, the mobile device 11 and the mobile device 12 perform data packet transmission in the relay gateway device 2 and the relay gateway device 3, respectively, and the mobile device 12 is replaced by the relay gateway device 3 to the middle. Following the gateway device 2, the processor 13 of the relay gateway device 2 is established in the memory 14 of the relay gateway device 2 according to a feedback message transmitted by the relay gateway device 3 by steps S107 and S109. a list containing the identification code of the mobile device 12, the new network protocol address, and the old network protocol address, wherein the identification code, the new network protocol address, and the old network protocol address correspond to each other; 11 When a packet is to be transmitted to the mobile device 12, the processor 13 of the relay gateway device 2 determines, according to the list, that the destination of the packet is in its own domain, so that the processor 13 of the relay gateway device 2 directly This packet is transmitted to the mobile device 12 without being transmitted to the relay gateway device 3 to increase the transmission speed.

In summary, through the cross-domain handoff system, method and relay gateway device of the present invention, data packets are transmitted in the same network domain or different network domains in the mobile device 11 and the mobile device 12, even if the mobile device 12 has changed hands, the replacement device transmits the old and new network protocol address of the packet through the relay gateway device before the handover, and the mobile device 11 still transmits the packet whose destination end is the old network protocol address or the receiving source is old. The packet of the network protocol address is used to achieve the seamless transmission of the packet between the mobile devices 11 and 12, and thus the packet transmitted between the mobile device 12 and the mobile device 11 after the replacement of the new network protocol address is prevented from being lost.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

Claims (16)

A mobile device cross-domain handoff system includes a first relay gateway device and a second relay gateway device, the first relay gateway device and the second relay gateway device Directly or indirectly connected, the first relay gateway device includes a first processor and a first storage device, and the second relay gateway device includes a second processor and a second storage device, wherein the first a mobile device and a second mobile device are transmitting packets through the first relay gateway device, and the second mobile device is handed over by the first relay gateway device to the second relay gateway device. The system performs a mobile device cross-domain handover method including: the second processor determines the joining of the second mobile device; the second processor broadcasts a composite information of the second mobile device; and the first processor Updating a first list of the first storage device according to the composite information of the second mobile device; wherein the composite information includes an identification code and a new network address (IP Address), and the identification code, the new Network protocol bit and the first in the first list An old network protocol address of the mobile device corresponds to each other; wherein when the first mobile device transmits a first packet to the second mobile device and the destination end of the first packet is the old network protocol address, The first processor modifies the old network protocol address of the destination end of the first packet according to the old network protocol address in the first list of the first storage and the new network protocol address. The new network protocol address is then transmitted to the second mobile device via the second relay gateway device. The cross-domain handoff system of claim 1, wherein after the first processor updates the first list of the first storage device according to the composite information of the second mobile device, the method further includes: the first The processor transmits a feedback message to the second processor; and according to the feedback message, the second processor updates or establishes the composite information of the second mobile device in a second list of the second storage, wherein The compound The identification code in the information, the new network protocol address and the old network protocol address correspond to each other; wherein the feedback message includes the old network protocol address of the second mobile device. The cross-domain handoff system of claim 1, wherein after the second processor determines that the second mobile device is added, the method further includes: the second processor establishing the composite information of the second mobile device The second list of the second storage. The cross-domain handoff system of claim 3, wherein the second processor determines, according to the new network protocol address of the second mobile device, that the destination end of the first packet is located in the second relay In the domain of the gateway device, the second processor directly transmits the first packet to the second mobile device without transmitting to the first relay gateway device. The cross-domain handoff system of claim 1, wherein the identification code of the second mobile device further comprises a media access control address (MAC Address), an International Mobile Equipment Identity (IMEI) or an international Mobile Subscriber Identity (IMSI). The cross-domain handoff system of claim 1, wherein when the second mobile device transmits a second packet to the first mobile device and the source end of the second packet is the new network protocol address, The first processor modifies the new network protocol address of the source end of the second packet to become the old network protocol bit according to the old network protocol address in the first list and the new network protocol address. The address is transmitted to the first mobile device. A mobile device cross-domain handover method is implemented in a mobile device cross-domain handover system, the system comprising a first relay gateway device and a second relay gateway device, the first relay gateway The device is directly or indirectly connected to the second relay gateway device, wherein a first mobile device and a second mobile device transmit packets through the first relay gateway device, and the second mobile device is configured by the first mobile device a relay gateway device is handed over to the second relay gateway device, the method comprising: the second relay gateway device determining the joining of the second mobile device; The second relay gateway device broadcasts a composite information of the second mobile device; and the first relay gateway device updates a first portion of the first relay gateway device according to the composite information of the second mobile device a list; wherein the composite information includes an identification code and a new network protocol address, and the identification code, the new network protocol bit, and an old network protocol address of the second mobile device in the first list Corresponding to each other; wherein when the first mobile device transmits a first packet to the second mobile device and the destination end of the first packet is the old network protocol address, the first relay gateway device is configured according to the first The old network protocol address in the list and the new network protocol address, and the old network protocol address of the destination end of the first packet is modified to become the new network protocol address, and then the second relay The gateway device is transmitted to the second mobile device. The cross-domain handover method according to claim 7, wherein after the first relay gateway device updates the first list of the first relay gateway device according to the composite information of the second mobile device, The method further includes: the first relay gateway device transmitting a feedback message to the second relay gateway device; and according to the feedback message, the second relay gateway device updates or establishes the composite of the second mobile device Information in a second list of the second relay gateway device, wherein the identification code in the composite information, the new network protocol address and the old network protocol address correspond to each other; wherein the feedback message includes the The old network protocol address of the second mobile device. The cross-domain handover method according to claim 7, wherein after the second relay gateway device determines that the second mobile device is added, the method further includes: the second relay gateway device establishing the second action The composite information of the device is in a second list of the second relay gateway device. The cross-domain handover method according to claim 9, wherein the relay gateway device determines the destination of the first packet according to the new network protocol address of the second mobile device. The end is located in the domain of the second relay gateway device, and the second processor directly transmits the first packet to the second mobile device without transmitting to the first relay gateway device. The cross-domain handoff method of claim 7, wherein the identification code of the second mobile device further comprises a media access control address, an international mobile device identifier or an international mobile subscriber identity. The cross-domain handover method according to claim 7, wherein when the second mobile device transmits a second packet to the first mobile device and the source end of the second packet is the new network protocol address, The first relay gateway device modifies the new network protocol address of the source end of the second packet as the old network according to the old network protocol address in the first list and the new network protocol address The road agreement address is transmitted to the first mobile device. A relay gateway device includes: a processor; and a storage device connected to the processor; wherein when a first mobile device and a second mobile device pass the trunk gateway device for packet transmission, and the When the second mobile device is handed over by the relay gateway device to another relay gateway device, a list of the storage device stores an identification code of the second mobile device, and the second mobile device is at the relay gate An old network protocol address on the track device and a new network protocol address of the second mobile device on the other relay gateway device, the identification code, the new network protocol address, and the old The network protocol addresses correspond to each other; wherein when the first mobile device transmits a first packet to the second mobile device and the destination end of the first packet is the old network protocol address, the processor according to the list The old network protocol address of the second mobile device and the new network protocol address, and the old network protocol address of the destination end of the first packet is modified to be the new network protocol address, and then transmitted to the new network protocol address. Second mobile device. The relay gateway device of claim 13, wherein the identification of the mobile device The code further includes a media access control address, an international mobile device identifier or an international mobile subscriber identity. The relay gateway device of claim 13, wherein when the second mobile device transmits a second packet to the first mobile device and the source end of the second packet is the new network protocol address, The processor modifies the new network protocol address of the source end of the second packet to become the old network protocol bit according to the old network protocol address of the second mobile device in the list and the new network protocol address. The address is transmitted to the first mobile device. The relay gateway device of claim 13, wherein the first mobile device and the second mobile device perform packet transmission and the second mobile device is handed over by the relay gateway device to the other relay The gateway deletes the new network protocol address of the second mobile device in the list when the gateway device switches back to the relay gateway device.