WO2009140902A1 - 超小型蜂窝网络与宏网络之间进行通信的方法、系统及超小型网关 - Google Patents
超小型蜂窝网络与宏网络之间进行通信的方法、系统及超小型网关 Download PDFInfo
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- WO2009140902A1 WO2009140902A1 PCT/CN2009/071820 CN2009071820W WO2009140902A1 WO 2009140902 A1 WO2009140902 A1 WO 2009140902A1 CN 2009071820 W CN2009071820 W CN 2009071820W WO 2009140902 A1 WO2009140902 A1 WO 2009140902A1
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- internet protocol
- access point
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004891 communication Methods 0.000 title claims abstract description 18
- 238000013507 mapping Methods 0.000 claims description 47
- 230000001413 cellular effect Effects 0.000 claims description 43
- 238000013475 authorization Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 abstract description 12
- 238000010348 incorporation Methods 0.000 abstract 1
- 230000004044 response Effects 0.000 description 41
- 230000003993 interaction Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 14
- 238000013508 migration Methods 0.000 description 14
- 230000005012 migration Effects 0.000 description 14
- 238000012546 transfer Methods 0.000 description 12
- 238000012795 verification Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
Definitions
- the present invention relates to the field of mobile communications, and in particular, to a method and system for communicating between a femto cell network and a macro network, and a Femto GateWay (FGW:). Background technique
- FIG. 1 is a schematic diagram of a HRPD network architecture in the prior art.
- An Access Terminal (AT) passes through a Base Station Transceiver (BTS) and a Base Station Controller (BSC).
- BTS Base Station Transceiver
- BSC Base Station Controller
- PCF Packet Control Function
- PDSN Packet Data Serving Node
- the BTS and the BSC form an access network (AN).
- the A10/A11 interface is the interface between the PCF and the PDSN.
- the A13 interface is the session migration interface between the ANs.
- the A16 interface is between the ANs.
- Hard switch interface, A12 interface is AN and AN authentication and authorization accounting server (Authentication) Interface between Authorization Accounting (AAA),
- A8/A 9 is: Interface between BSC and PCF.
- FIG. 2 is a schematic diagram of a super-small cellular network architecture in the prior art.
- a Femto Access Point accesses the Internet through a modem or a Home Gateway (HGW), and then passes through an ultra-small The gateway (Femto GateWay, FGW for short) is connected to the Macro Network.
- FAP implements the functions of BTS, BSC, and PCF in Figure 1.
- ultra-small cellular networks After the deployment of ultra-small cellular networks on existing macro networks, the following interfaces exist between ultra-small cellular networks and existing macro networks:
- the FAP provides the A10/A11 interface to access the PDSN in the existing macro network through the FGW;
- the FAP In order to support the handover between the ultra-small cellular network and the existing macro network, the FAP needs to provide the A13/A16 interface to access the existing macro network through the FGW;
- FAP provides AN-AAA for the A12 interface to access the existing macro network.
- the A10/A11 interface is used to establish a bearer connection between the PCF and the PDSN for the packet data service user.
- the A13 interface can implement the session migration between the FAP and the macro network, and the A16 interface can implement the hard handover between the FAP and the macro network. , through the A12 interface can achieve AT access.
- the number of interfaces supported by AN, AN-AAA, and PDSN is limited, and a large number of FAP accesses cannot be supported. As the number of FAPs increases, the deployment of macro network elements needs to be increased, resulting in increased costs. For each additional FAP, the network element on the macro network side needs to change the configuration, and the maintenance cost is increased. Summary of the invention
- the embodiments of the present invention provide a method, a system, and an ultra-small gateway for communication between a small-sized cellular network and a macro network, and support a large number of FAPs on the ultra-small cellular network side to access the macro network. Without the need to change the configuration of the network element on the macro network side, the maintenance cost can be reduced.
- Embodiments of the present invention provide a method for communication between a very small cellular network and a macro network, including:
- the source Internet Protocol address in the message/data from the ultra-small access point is replaced with the Internet Protocol address of the ultra-small gateway and sent to the macro network side; and/or
- the destination internet protocol address in the message/data from the macro network side is replaced with the internet protocol address of the ultra small access point and sent to the ultra small access point.
- the embodiment of the invention further provides a method for communication between a very small cellular network and a macro network, including:
- the ultra-small gateway receives the message sent by the ultra-small access point for requesting authentication
- the ultra-small gateway forwards the message for requesting authentication to the access network authentication and authorization charging server according to the username field in the message for requesting authentication.
- the embodiment of the invention further provides an ultra-small gateway, including:
- a receiving module configured to receive a message/data from a macro network side or from a small-sized access point
- an address replacement module configured to receive, by the receiving module, a message/data from the ultra-small access point Replacing the source Internet Protocol address with the Internet Protocol address of the ultra-small gateway, or replacing the destination Internet Protocol address in the message/data from the macro network side with the Internet Protocol address of the ultra-small access point;
- a sending module configured to send a message/data after the address replacement module performs address replacement To the macro network side or the ultra-small access point.
- the embodiment of the invention further provides an ultra-small gateway, including:
- a second receiving module configured to receive a message sent by the ultra-small access point for requesting authentication, or receive a message sent by the access network authentication and authorization charging server to indicate that the authentication is passed;
- a second forwarding module configured to send, according to the username field in the message for requesting authentication, a message sent by the received ultra-small access point for requesting authentication to the access network
- the authentication authorization charging server or according to the identifier field in the message for indicating the authentication pass, the received message sent by the access network authentication authorization charging server to indicate the authentication pass Sent to the ultra-small access point.
- An embodiment of the present invention further provides a system for communicating between a small-sized cellular network and a macro network, including: at least one ultra-small access point and at least one ultra-small gateway.
- the ultra-small access point is configured to send a message/data to the ultra-small gateway or receive a message/data sent by the ultra-small gateway;
- the ultra-small gateway is configured to receive a message/data from a macro network side or from the ultra-small access point, and replace the received source internet protocol address in the message/data from the ultra-small access point with The Internet Protocol address of the ultra-small gateway, or the destination Internet Protocol address in the message/data from the macro network side is replaced with the Internet Protocol address of the ultra-small access point, and the message after the address replacement is/ Data is sent to the macro network side or the ultra small access point.
- the embodiment of the present invention converts the source IP address in the message/data sent by the FAP into the IP address of the FGW accessed by the FAP, and converts the destination IP address in the message/data sent by the macro network side into the corresponding FAP.
- the IP address is used to implement the message/data interaction between the FAP and the macro network side. No matter how many FAPs access the FGW, only the IP address of the FGW or the IP addresses of several FGWs are presented for the macro network side.
- the macro network side only needs to store and record information about the FGW without changing the configuration due to the joining of multiple FAPs, which can save maintenance costs.
- FIG. 1 is a schematic diagram of a HRPD network architecture in the prior art
- FIG. 2 is a schematic diagram of a super-small cellular network architecture in the prior art
- FIG. 3 is a flow chart showing a first embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention
- FIG. 4 is a flow chart showing a second embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention
- FIG. 5 is a flowchart of Embodiment 3 of a method for communicating between a very small cellular network and a macro network according to the present invention
- FIG. 6 is a flow chart showing a fourth embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention.
- FIG. 7 is a flow chart showing a fifth embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention.
- FIG. 8 is a flow chart showing a sixth embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention.
- FIG. 9 is a flow chart showing a seventh embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention.
- FIG. 10 is a flowchart showing an eighth embodiment of a method for communicating between a very small cellular network and a macro network according to the present invention.
- FIG. 11 is a schematic structural diagram of Embodiment 1 of a super-small gateway according to the present invention.
- Embodiment 12 is a schematic structural diagram of Embodiment 2 of a super-small gateway according to the present invention.
- Embodiment 3 of a super-small gateway according to the present invention is a schematic structural diagram of Embodiment 3 of a super-small gateway according to the present invention.
- FIG. 14 is a schematic structural diagram of Embodiment 4 of a super-small gateway according to the present invention.
- FIG. 15 is a schematic structural diagram of Embodiment 5 of the ultra-small gateway according to the present invention.
- FIG. 3 is a flowchart of Embodiment 1 of a method for performing communication between a very small cellular network and a macro network according to the present invention, which specifically includes:
- Step 101 Convert the source IP address in the message/data sent by the FAP into an Internet Protocol (IP) address of the FGW accessed by the FAP, and send it to the macro network side;
- IP Internet Protocol
- Step 102 Convert the destination IP address in the message/data sent by the macro network side to the IP address of the FAP, and send the processed message/data to the ultra-small access point.
- the first embodiment of the present invention converts the source IP address in the message/data sent by the FAP into the IP address of the FGW accessed by the FAP, and converts the destination IP address in the message/data sent by the macro network side into a corresponding FAP.
- IP address to achieve FAP and macro network side message / data interaction, no matter how many FAP access to a FGW, for the macro network side, only one FGW IP address or several FGW IP addresses are presented. In this way, the macro network side only needs to store and record information about the FGW without changing the configuration (ie, storing and recording information of each FAP) due to the joining of multiple FAPs, which can save maintenance costs.
- FIG. 4 is a second flowchart of a method for performing communication between a very small cellular network and a macro network according to the present invention, which specifically includes:
- Step 201 Convert the destination IP address in the message/data sent by the macro network side to the corresponding FAP IP address, and send it to the FAP.
- Step 202 Convert the source IP address in the message/data sent by the FAP into an IP address of the FGW accessed by the FAP, and send the processed message/data to the macro network side.
- the destination IP address in the message/data sent by the macro network side is converted into the IP address of the corresponding FAP
- the source IP address in the message/data sent by the FAP is converted into the FGW accessed by the FAP.
- IP address, to achieve FAP and macro network side message / data interaction no matter how many FAP access to a FGW, for the macro network side, only one FGW IP address or several FGW IP addresses are presented. In this way, the macro network side only needs to store and record information about the FGW without changing the configuration (ie, storing and recording information of each FAP) due to the joining of multiple FAPs, which can save maintenance costs.
- the first embodiment is applicable to the case where the FAP side initiates the message/data transmission
- the second embodiment is applicable to the case where the macro network side initiates the message/data transmission.
- FIG. 5 is a flowchart of Embodiment 3 of a method for performing communication between a super small cellular network and a macro network according to the present invention.
- the third embodiment shows a message/data interaction between the FAP and the PDSN on the macro network side. specific process.
- the PDSN identifies an A10 connection by using the PCF IP address and the key value (A10 KEY) (the connection between the ultra-small cellular network side and the macro network side in the embodiment of the present invention is a communication connection), in this implementation.
- the FGW will reassign a key value (A10 KEY).
- the key value (FAP_A10-KEY) represents the key value of the FAP allocation (A10 KEY)
- the second key value (FGW_A10-KEY) is used to represent the key value (A10 KEY) assigned by the FGW.
- the third embodiment specifically includes:
- Step 301 The FAP sends an Al1 registration request message (Al1 -Registration Request) of the FAP to the FGW, where the All registration request message includes the first key value of the FAP allocation.
- Al1 -Registration Request Al1 registration request message
- Step 302 The FGW receives an All Registration Request message (Al 1 -Registration Request) from the FAP. If it is determined to be a new A10 connection establishment request message, the FGW allocates a second key value to the connection (FGW_A10— KEY ), if the All-Registration Request contains multiple first key values of the FAP allocation (FAP_A10-KEY), the Bayesl FGW needs to allocate multiple second key values (FGW-A10- KEY) corresponds to the first key value (FAP_A10-KEY) assigned by the multiple FAPs; then the FGW replaces the care-of address in the All-Registration Request with the IP address of the FGW, and uses the second The key value (FGW_A10-KEY) replaces the first key value of the FAP allocation (FAP_A10-KEY), and recalculates the message digest algorithm 5 (Message-Digest Algorithm 5, MD5) of the All-Registration Request message.
- the message digest algorithm 5
- MD5 message digest is used for message integrity Sex protection, after receiving the receiver, it uses the same algorithm as the sender to calculate the MD5 message digest (calculates the MD5 message digest based on the message content and shared key), and compares it with the message digest in the message. If they are equal, the message is not Malicious modification. Since the FGW modifies the key value and the care-of address, the MD5 message digest should be recalculated after the modification is completed, placed in the corresponding information unit in the message, and then the subsequent message processing step), the IP packet in the message The source address is replaced with the IP address of the FGW, and then the processed message is sent to the PSDN on the macro network side.
- Step 303 The PSDN sends an All-Registration Reply message to the FGW.
- FAP—A10— KEY recalculates the MD5 authentication value of the Al 1 -Registration Reply message, and replaces the destination IP address of the IP packet in the message with the All-Reistration Request message.
- the IP address of the FAP (All Registration Request message and All Registration Reply message contain an International Mobile Subscriber Identity (IMSI)) through which the FGW can learn the All Registration Request message and the All Registration Reply message.
- IMSI International Mobile Subscriber Identity
- the FGW can determine which IP address of the FAP is replaced by the destination IP address of the IP packet in the All registration response message, and determine which first key value to replace the second key value in the All registration response message with ); if the All-Registration Reply indicates that the PDSN accepts the connection establishment, it is also required Set the second key value (FGW—A10—KEY) and the mapping relationship between the IP address of the FGW and the first key value (FAP—A10—KEY) and the IP address of the FAP, that is, a first key value (FAP—A10—KEY And the combination of the IP address of the FAP, corresponding to a combination of a second key value (FGW_A10-KEY) and the IP address of the FGW, for subsequent data exchange between the FAP and the PDAN; then the FGW will process the All The All-Registration Reply message is sent to the corresponding FAP.
- FGW—A10—KEY the mapping relationship between the IP address of the FGW and the first key value (F
- Step 305 The FAP sends an A10 Generic Routing Encapsulation Packet (A10 GRE Packet) to the FGW.
- A10 GRE Packet A10 Generic Routing Encapsulation Packet
- Step 306 After receiving the A10 GRE packet (A10 GRE Packet), the FGW, according to the second key value (FGW_A10-KEY) established in step 304, and the IP address of the FGW and the first key value (FAP— A10—KEY) and the IP address mapping of the FAP, replace the source IP address in the A10 GRE packet (A10 GRE Packet) with the IP address of the corresponding FGW, and replace the first key value (FAP A10 KEY) with the corresponding one.
- the second key value (FGW_A10-KEY) then the FGW sends the processed A10 GRE packet (A10 GRE Packet) to the PDSN.
- Step 307 The PDSN sends an A10 GRE packet (A10 GRE Packet) to the FGW.
- A10 GRE Packet A10 GRE Packet
- Step 308 After receiving the A10 GRE packet (A10 GRE Packet) sent by the PDSN, the FGW, according to the second key value (FGW_A10-KEY) established in step 304, and the IP address of the FGW and the first key value (FAP) — A10— KEY) and the mapping of the IP address of the FAP, replacing the destination IP address in the A10 GRE packet (Al O GRE Packet) with the IP address of the corresponding FAP, and the second key value (FGW—A10—KEY) Replace with the corresponding first key value (FAP_A10-KEY); then the FGW sends the processed A10 GRE packet (A10 GRE Packet) to the FAP.
- FGW_A10-KEY the second key value
- the source IP address in the message sent by the FAP to the PDSN is replaced with the IP address of the FGW, and the first key value (FAP_A10-KEY) allocated by the FAP for the connection is replaced by the second key allocated by the FGW.
- the value (FGW_A10-KEY) replaces the destination IP address in the message sent by the PDSN to the FAP with the IP address of the corresponding FAP, and replaces the second key value (FGW_A10-KEY) with the first key value ( FAP—A10—KEY), so that only the IP address of the FGW is presented for the PDSN, and the configuration information does not need to be changed, and the message interaction between the FAP and the PDSN can be implemented at the same time.
- the A13/A16 interface performs FAP and macro network side message interaction
- the Unicast Access Terminal Identifier is the identifier assigned by the FAP to the access terminal AT. It has two formats: UATI128 and UATI32.
- the 104-bit UATI104 replaces the color code (Color Code).
- the color code has a length of 8 bits. That is, the color code and UATI024 form UATI32.
- the AT identifier based on the A16 interface is UATI32, and the AT identifier based on the A13 interface is used. UATI128.
- the UATIs assigned by each FAP may be the same.
- the FAP interacts with the macro network side message based on the A13/A16 interface, the mapping between the UATI and the FAP needs to be established.
- the UATI024 is split into two parts, namely FAP_Index and UATI-FAP.
- the FGW configures the subnet identifier (UATI104 and color code) and the FAP index to which the FAP belongs to the FAP for use by the FAP to allocate the UATI to the AT. This ensures that the UATI assigned by each FAP is unique.
- FIG. 6 is a flowchart of Embodiment 4 of a method for communicating between a very small cellular network and a macro network according to the present invention.
- the fourth embodiment of the present invention is an active state switching process of an AN in a FAP to a macro network, which specifically includes:
- Step 401 The FAP sends an A16-Session Transfer Request message to the FGW.
- the FAP can determine a target AN.
- the destination IP address is the IP address of the target AN
- the destination port number is the A16-known port number.
- Step 402 After receiving the A16-Session Transfer Request message sent by the FAP, the FGW records the correspondence between the AT-ID and the FAP in the message; the AT-ID is in the A16 session migration request message.
- An information unit is an identifier assigned by the FAP to the AT.
- the AT-ID is carried in the message exchanged between the subsequent FAP and the AN, and the AT-ID is a UATI with a length of 32 bits; then the FGW migrates the A16 session.
- the source IP address in the request message (A16-Session Transfer Request) is replaced with the IP address of the FGW, and then the A16-Session Transfer Request message (A16-Session Transfer Request) is sent to the AN.
- Step 403 The AN sends an A16 session migration response message (A16-Session Transfer Response) To the FGW.
- Step 404 After receiving the A16 session migration response message (A16-Session Transfer Response) sent by the AN, the FGW searches for the corresponding relationship between the AT-ID and the FAP recorded in step 402 according to the AT-ID in the message. The corresponding FAP, then replaces the destination IP address in the message with the IP address of the corresponding FAP, and sends the processed A16 session migration response message (A16-Session Transfer Response) to the corresponding FAP.
- A16 session migration response message A16-Session Transfer Response
- Step 405 The FAP sends an A16-Session Transfer Complete message to the FGW.
- Step 406 After receiving the A16 session migration complete message (A16-Session Transfer Complete) sent by the FAP, the FGW replaces the source IP address in the message with the IP address of the FGW, and then completes the A16 session migration after the replacement processing.
- the message (A16-Session Transfer Complete) is sent to the AN.
- Step 407 The AN sends an A16-Session Release Indication to the FGW.
- Step 408 The FGW receives the A16 session release indication message sent by the AN (A16-Session
- the corresponding relationship between the AT-ID and the FAP recorded in step 402 is queried according to the AT-ID in the message, and the corresponding FAP is found, and then the destination IP address in the message is replaced by the IP address of the corresponding FAP.
- the address is sent to the corresponding FAP by the processed A16-Session Release Indication.
- Step 409 The FAP sends an A16 session release indication confirmation message (A16-Session Release
- Step 410 After the FGW receives the A16-Session Release Indication ACK sent by the FAP, if the AT-ID in the message is not a UATI (Long Code Mask UATI) that generates a long code mask. LCM - UATI ) (The AT-ID in the message is not LCM - UATI indicates that no message will be sent to the FAP in the future), then the FGW releases the correspondence between the AT-ID and the FAP recorded in step 402, if The AT-ID in the message is LCM - UATI (The AT-ID in the message is LCM - UATI indicates that a message will be sent to the FAP in the future), and the correspondence between the AT-ID and the FAP recorded in step 402 is not released; A13-Keep Alive Request, A13-Keep Alive Response, A13-Resource Release Request, and A13-Resource Release Response (A13-Resource Release Response) The FAP is sent to the LCM-UATI corresponding FAP; then the FGW replaces the source
- Step 411 The AN sends an A13 Keep Alive Request message to the FGW.
- Step 412 The FGW receives the A13 keepalive request message sent by the AN (A13-Keep Alive)
- the corresponding relationship between the AT-ID and the FAP recorded in step 402 is queried according to the AT-ID in the message, and the corresponding FAP is found, and then the destination IP address in the message is replaced by the IP address of the corresponding FAP. And send the processed A13-Keep Alive Request message to the corresponding FAP.
- Step 413 The FAP sends an A13-Keep Alive Response message to the FGW.
- Step 414 After receiving the A13-Keep Alive Response message sent by the FAP, the FGW replaces the source IP address in the message with the IP address of the FGW, and then replaces the A13 keep-alive response.
- the message (A13-Keep Alive Response) is sent to the AN.
- Step 415 The AN sends an A13 Resource Release Request message (A13-Resource Release Request) to the FGW.
- Step 416 After receiving the A13 resource release request message (A13-Resource Release Request) sent by the AN, the FGW obtains an AT-ID according to the UATI128 in the message (the FGW needs to configure the correspondence between the UATI 104 and the color code), and then according to the AT. -ID queries the mapping between the AT-ID and the FAP recorded in step 402, finds the corresponding FAP, and then replaces the destination IP address in the message with the IP address of the corresponding FAP, and releases the processed A13 resource.
- the request message (A13-Resource Release Request) is sent to the corresponding FAP.
- Step 417 The FAP sends an A13 Resource Release Response message (A13 - Resource Release Response) to the FGW.
- the FGW After receiving the A13 resource release response message (A13-Resource Release Response) sent by the FAP, the FGW replaces the source IP address in the message with the IP address of the FGW, and then releases the A13 resource release response after the replacement process.
- the message (A13-Resource Release Response is sent to the AN, and the correspondence between the AT-ID and the FAP is released.
- the correspondence between the AT-ID and the FAP is first established.
- the source IP address in the message is replaced with the IP address of the FGW, and the message from the AN is based on the message.
- the AT-ID by querying the correspondence between the AT-ID and the FAP, finds a unique FAP, and then replaces the destination IP in the message from the AN with the IP address of the corresponding FAP, thus implementing AN and FAP.
- the message exchange between the two is presented to the IP address of the FGW. Regardless of the number of FAPs, the network elements in the AN do not need to change the configuration, which reduces maintenance costs.
- FIG. 7 is a flowchart of Embodiment 5 of a method for performing communication between a super small cellular network and a macro network according to the present invention.
- the fifth embodiment shows an active state switching process from AN to FAP, and the handover is initiated by the AN.
- the FGW After determining the target FAP, the FGW establishes a correspondence between the AT-ID and the FAP, and searches for the message exchange between the FAP and the AN. For the message from the AN, the destination IP address in the message is queried by the AT- The relationship between the ID and the FAP is replaced by the IP address of the FAP corresponding to the AT-ID in the message.
- the FGW replaces the source IP address in the message with the IP address of the FGW, so that the FAP can be implemented.
- the fifth embodiment differs from the fourth embodiment in that: in the fifth embodiment, the A13 keep-alive response message (A13-Keep Alive Response) sent by the AN to the FGW does not carry the AT-ID assigned by the AN, but The FATI-assigned UATI 128 is carried. Therefore, after the FGW receives the message sent by the FAP, the FGW needs to establish a correspondence between the UATI 128 and the FAP in the message, and is used by the FGW in step 513 to determine the target FAP.
- A13 keep-alive response message A13-Keep Alive Response
- the correspondence between the AT-ID and the FAP and the UATI128 are established.
- the correspondence between the FAPs, for the message from the FAP replaces the source IP address in the message with the IP address of the FGW, and for the message from the AN, based on the AT-ID or UATI128 in the message, by querying the AT-ID or UATI128 Correspondence with the FAP, find a unique FAP, and then replace the destination IP in the message from the AN with the IP address of the corresponding FAP, thus implementing message interaction between the AN and the FAP, for the AN
- the IP address of the FGW is presented. Regardless of the number of FAPs, the network elements in the AN do not need to change the configuration, which reduces maintenance costs.
- FIG. 8 is a flowchart of Embodiment 6 of a method for performing communication between a very small cellular network and a macro network according to the present invention.
- the sixth embodiment shows a session migration switching process of an AN from a FAP to a macro network, specifically including :
- Step 601 The AN sends an A13-Session Information Request to the FGW.
- Step 602 After receiving the A13-Session Information Request sent by the AN, the FGW searches for the corresponding FAP by using the subnet identifier and the index of the FAP according to the subnet identifier (UATI104) in the message. The destination IP address in the message is replaced with the IP address of the corresponding FAP, and the message processed by the replacement is sent to the FAP.
- UATI104 subnet identifier
- Step 603 The FAP sends an A13 Session Information Response message (A13-Session Information Response) to the FGW.
- A13 Session Information Response A13-Session Information Response
- Step 604 After receiving the A13 session information response message (A13-Session Information Response) sent by the FAP, the FGW replaces the source IP address in the message with the IP address of the FGW, and sends the replaced message to the AN.
- A13 session information response message A13-Session Information Response
- Step 605 The AN sends an A13 Session Information Confirmation message (A13 - Session Information Confirmation) to the FGW.
- Step 606 After receiving the A13-Session Information Confirmation message sent by the AN, the FGW searches for the corresponding FAP by using the subnet identifier and the index of the FAP according to the subnet identifier (UATI104) in the message. Replace the destination IP address in the message with the corresponding one. The IP address of the FAP, and the message processed by the replacement is sent to the FAP.
- UATI104 subnet identifier
- the session migration is initiated by the AN, and the FGW finds the IP address of the corresponding FAP according to the subnet identifier (UATI104), and uses the IP address of the corresponding FAP found in the destination IP address sent by the AN.
- the source IP address in the message is replaced with the IP address of the FGW. This allows the session to be migrated from the FAP to the AN without the network side NE changing configuration and saving network maintenance costs.
- the FGW may send an A13 session information rejection message to the AN (A13).
- A13 A13 session information rejection message
- the FGW may send an A13 session information rejection message to the AN (A13).
- -Session Information Reject triggers the AN to re-negotiate the session with the AT, and the session on the FAP can be released through the standard session keep-alive mechanism.
- FIG. 9 is a flowchart of Embodiment 7 of a method for communicating between a small-sized cellular network and a macro network according to the present invention.
- the seventh embodiment shows a session migration switching process of an AN to a FAP in a macro network, which specifically includes :
- Step 701 The FAP sends an A13-Session Information Request to the FGW.
- Step 702 After receiving the A13-Session Information Request sent by the FAP, the FGW establishes a correspondence between the UATI 128 and the FAP according to the UATI 128 in the message, and replaces the source IP address in the message with the FGW. The IP address, and the message processed by the replacement is sent to the AN.
- Step 703 The AN sends an A13 session information response message (A13 - Session Information)
- Step 704 After receiving the A13 session information response message (A13-Session Information Response) sent by the AN, the FGW searches the corresponding relationship between the UATI 128 and the FAP established in step 702 according to the UATI 128 in the message to find the corresponding FAP. The destination IP address in the message is replaced with the IP address of the corresponding FAP, and the replaced message is sent to the corresponding FAP.
- A13 session information response message A13-Session Information Response
- Step 705 The FAP sends an A13 session information confirmation message (A13-Session Information) Confirmation ) to FGW.
- A13 session information confirmation message A13-Session Information
- Step 706 After receiving the A13-Session Information Confirmation message sent by the FAP, the FGW replaces the source IP address in the message with the IP address of the FGW, and sends the replaced message to the AN. .
- the session migration is initiated by the FAP, and the FGW establishes a correspondence between the UATI 128 and the FAP according to the UATI 128 in the message sent by the FAP, and uses the message exchanged between the subsequent FAP and the AN.
- the FGW The source IP address in the message is replaced with the IP address of the FGW.
- the FGW searches for the corresponding FAP by querying the corresponding relationship between the UATI 128 and the FAP, and replaces the message sent by the AN with the address of the corresponding FAP found.
- the destination IP address in the network can be used to implement session migration from the AN to the FAP without changing the configuration on the network side NE and saving network maintenance costs.
- the FAP authenticates to the AN-AAA through the A12 interface.
- the FGW can be used as a proxy AN-AAA.
- the IP address of the AN-AAA is set to the IP address of the FGW in the message sent by the FAP, thereby implementing the FAP and the macro network side. Message interaction between AN-AAA.
- FIG. 10 is a flowchart of Embodiment 8 of a message interaction method between a small-sized cellular network access point and a macro network according to the present invention.
- the eighth embodiment shows an authentication process of the AN-AAA in the FAP to the macro network. Specifically, including:
- Step 801 The FAP sends an A12 Access Request message (A12 Access Request) for requesting authentication to the FGW.
- A12 Access Request A12 Access Request
- the FGW is used as the proxy AN-AAA, so the destination IP address of the A12 access request message is the IP address of the FGW, the source IP address is the IP address of the FAP, and the A12 access request message includes the FAP.
- a first identifier (Identifier) assigned to the A12 access request message (stored in the identifier field of the A12 access request message), and a "User-Name" field, "CHAP (Challenge-Handshake) Authentication Protocol, Challenge Handshake Authentication Protocol) -Password” and "CHAP-Challenge” attributes, etc.
- the "CHAP-Password” attribute Contains the CHAP identity and CHAP response from the access terminal AT.
- Step 802 After receiving the A12 access request message (A12 Access Request) sent by the FAP, the FGW sends the message according to the “User-Name” field in the A12 Access Request message (A12 Access Request). Forward to the corresponding AN-AAA.
- the FGW allocates a second identifier (Identifier) for the A12 access request message, and saves the context information of the current authentication (such as FAP) by using the second identifier as an index.
- IP address, first identifier (Identifier), etc. and replace the first identifier (Identifier) in the A12 access request message with the second identifier (Identifier), and replace the destination IP address of the A12 access request message
- the source IP address is replaced with the IP address of the FGW according to the IP address of the AN-AAA determined according to the User-Name field
- the A12 access request message is sent to the corresponding AN-AAA.
- Step 803 The AN-AAA receives the A12 access request message, performs access authentication processing on the access terminal AT, and completes the access authentication process of the access terminal AT, and sends an A12 indicating that the authentication is passed to the FGW. Access Accept Message (A12 Access Accept).
- the AN-AAA receives the A12 access request message, and the AN-AAA calculates the CHAP response by using the key corresponding to the user name (User-Name) in the A12 access request message, the CHAP identifier, and the CHAP-Challenge, and the A12 The CHAP response in the access request message is compared. If the same, the access authentication of the access terminal AT is passed, and the identifier of the A12 access accept message is set to be the second identifier in the A12 access request message.
- the first response verification code is generated by using the shared key between the AN-AAA and the FGW preset in the AN-AAA. And transmitting the first response verification code to the FGW in the A12 access accept message, where the destination IP address of the A12 access accept message is the IP address of the FGW, and the source IP address is the IP address of the AN-AAA.
- Step 804 After receiving the A12 Access Accept message, the FGW sends the message to the corresponding FAP according to an identifier (Identifier) field in the A12 access accept message.
- identifier Identifier
- the FGW uses the preset in the FGW.
- the shared key between the FGW and the AN-AAA calculates a response verification code, and determines whether the response verification code is the same as the first response verification code carried in the A12 access accept message.
- the second identifier (Identifier) in the access accept message indexes the context information, obtains the first identifier (Identifier) and the IP address of the FAP saved by the FGW, and replaces the A12 access accept message with the obtained first identifier (Identifier) a second identifier (Identifier), which uses the shared key between the FGW and the FAP preset in the FGW to generate a second response verification code to replace the first response verification code in the A12 access accept message, and access the A12
- the destination IP address in the received message is replaced with the IP address of the FAP. After the source IP address is replaced with the IP address of the FGW, the A12 access accept message is sent to the corresponding FAP.
- Embodiment 8 of the present invention sets the destination IP address in the message sent by the FAP to the IP address of the FGW by using the FGW as a proxy AN-AAA, and the FGW forwards the message from the FAP to the AN-AAA, and the message from the AN-AAA The message is forwarded to the FAP, so that the authentication of the FAP to the AN-AAA can be implemented without changing the configuration of the macro network side network element and saving the network maintenance cost.
- FIG. 11 is a schematic structural diagram of Embodiment 1 of a super-small gateway according to the present invention.
- the gateway specifically includes: a receiving module 11 configured to receive messages/data from a macro network side or from a small-sized access point; and an address replacement module 12, Used to replace the source IP address in the message/data from the ultra-small access point with the IP address of the ultra-small cellular gateway, or to replace the destination IP address in the message/data from the macro network side with the ultra-small access point
- the sending module 13 is configured to send the message/data after the address replacement by the address replacing module 12 to the macro network side or the ultra-small access point.
- FIG. 12 is a schematic structural diagram of Embodiment 2 of the ultra-small gateway of the present invention.
- the ultra-small gateway of the second embodiment further includes: a key value distribution module 18, which is connected to the receiving module 11 and used.
- the receiving module 11 After receiving the registration request message from the ultra-small access point, the receiving module 11 assigns a second key value to the new communication connection; the first mapping module 14, the key value distribution module 18, the address replacement module 12, and the receiving module 11 connection, used to establish the mapping relationship between the second key value (FGW_A10-KEY) and the IP address of the FGW and the first key value (FAP_A10-KEY) in the received registration request message and the IP address of the FAP ; the care-of address replacement module 17, And the first mapping module 14 and the receiving module 11 are configured to replace the care-of address in the message received by the receiving module 11 with the IP address of the ultra-small gateway; the key value replacement module 16, and the care-of address replacement module 17, the first The mapping module 14, the address replacement module 12, and the receiving module 11 are connected, and are used for the message processed by the care-of address replacing module 17 and the data received by the receiving module, according to the second key value established by the first mapping module 14 (FGW- A10—KEY) and the mapping relationship between the
- the key value replacement module 16 may include:
- the first key value replacement module 161 is connected to the first mapping module 14 and the receiving module 11, and is configured to receive the data received by the receiving module 11 according to the second key value established by the first mapping module 14 and the Internet of the ultra-small gateway.
- the mapping relationship between the protocol address and the first key value and the Internet Protocol address of the ultra-small access point, replacing the second key value in the data from the macro network side with the first key value, and the data from the ultra-small access point The first key value in the field is replaced with the second key value;
- the second key value replacement module 162 is connected to the first mapping module 14, the care-of address replacing module 17, and the authentication value generating module 15 for using the message processed by the care-of address replacing module 17 to be established according to the first mapping module 14.
- the second key value and the mapping relationship between the Internet Protocol address of the ultra-small gateway and the first key value and the Internet Protocol address of the ultra-small access point, and the second key value in the message from the macro network side is replaced by the first key value And replacing the first key value in the message from the ultra-small access point with the second key value, and sending the processed message to the authentication value generating module.
- the address replacement module 12 can include:
- the first address replacement module 121 is connected to the first key value replacement module 161, the first mapping module 14, and the sending module 13, and is configured to process the data processed by the first key value replacement module 161. According to the mapping relationship between the second key value established by the first mapping module 14 and the Internet Protocol address of the ultra-small gateway and the Internet address of the first key value and the ultra-small access point, the destination Internet in the data from the macro network side The protocol address is replaced with the Internet Protocol address of the ultra-small access point, and the source Internet Protocol address in the data from the ultra-small access point is replaced with the Internet Protocol address of the ultra-small gateway, and the processed data is sent to the sending module. 13;
- the second address replacement module 122 is connected to the authentication value generating module 15, the first mapping module 14, and the sending module 13 for using the message processed by the authentication value generating module 15 according to the second key established by the first mapping module 14.
- the address replacement replaces the source Internet Protocol address in the message from the ultra-small access point with the Internet Protocol address of the ultra-small gateway, and sends the processed message to the sending module 13.
- FIG. 13 is a schematic structural diagram of Embodiment 3 of the ultra-small gateway of the present invention.
- the ultra-small gateway in the third embodiment further includes: a second mapping module 20, configured to receive according to the receiving module 11
- the unicast identifier of the access terminal in the message from the ultra-small access point or the macro network side is established, and the correspondence between the unicast identifier of the access terminal and the ultra-small access point is established.
- FIG. 14 is a schematic structural diagram of Embodiment 4 of the ultra-small gateway of the present invention.
- the ultra-small gateway in the fourth embodiment further includes: an index configuration module 21, configured to store the ultra-small access point.
- the subnet ID and index configuration of the subnet and the index configuration of the super small access point to be sent to the ultra-small access point are used for the address replacement module 12 to query.
- FIG. 15 is a schematic structural diagram of Embodiment 5 of the ultra-small gateway according to the present invention. If the FGW is used as the proxy AN-AAA, the FGW is configured as shown in FIG. 15.
- the FGW includes: a second receiving module 31, configured to receive The message sent by the ultra-small access point for requesting authentication, or the message sent by the access network authentication and authorization accounting server for indicating the authentication pass; the second forwarding module 32, configured to request the authentication
- the username field in the message of the right sends the message sent by the received ultra-small access point for requesting authentication to the access network authentication and authorization accounting server, or according to the table
- the identifier field in the message passed by the authentication authority sends the received message sent by the access network authentication and authorization accounting server to indicate the authentication pass to the ultra-small access point.
- the embodiment of the present invention further provides a system for communicating between a small-sized cellular network and a macro network, where the system may include at least one FAP and at least one FGW, where the FGW may be as shown in FIG. 11, 12, 13, 14, or 15. The FGW shown.
- the embodiment of the present invention converts the source IP address in the message/data sent by the FAP into the IP address of the FGW accessed by the FAP, and converts the destination IP address in the message/data sent by the macro network side into the corresponding FAP.
- the IP address is used to implement the message/data interaction between the FAP and the macro network side. No matter how many FAPs are connected to one FGW, only one FGW IP address is presented for the macro network side (if multiple FAPs are respectively connected to the IP address) Different FGWs present several FGW IP addresses to the macro network side. In this way, the macro network side only needs to store and record information about the FGW without changing the configuration due to the joining of multiple FAPs, which can save maintenance. cost.
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Description
超小型蜂窝网络与宏网络之间进行通信的方法、 系统及超小型网关 本申请要求于 2008年 5月 19日提交中国专利局、申请号为 200810093288. 6、 发明名称为 "超小型蜂窝网络与宏网络之间进行通信的方法、 系统及超小型网 关" 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
本发明涉及移动通信领域, 尤其涉及一种超小型蜂窝(Femto cell)网络与 宏网络之间进行通信的方法、 系统及超小型网关 (Femto GateWay, 简称 FGW:)。 背景技术
码分多址 (Code Division Multiple Access , 简称 CDMA) 2000是第三代 移动通信主要的无线接入技术之一, 尽管其数据承载能力已经有了很大提高, 但对于丰富多彩的多媒体业务还是存在空中接口上的瓶颈。为了解决空中接口 上的瓶颈问题, 第三代合作伙伴计划 2 ( Third Generation Partnership Project 2, 简称 3GPP2)发布了高速率包数据(High Rate Packet Data, 简称 HRPD)标准, 可以提高无线接口的数据传输速率。如图 1所示为现有技术中 HRPD网络架构 示意图,接入终端(Access Terminal,简称 AT)通过基站收发信机(Base Station Transceiver, 简称 BTS)、 基站控制器 (Base Station Controller, 简称 BSC) 以 及分组控制功能 (Packet Control Function, 简称 PCF) 接入到宏网络侧的分组 数据服务结点 (Packet Data Serving Node , 简称 PDSN)。 其中, BTS禾 Π BSC 组成一个接入网 (Access Network, 简称 AN) , A10/A11接口是 PCF与 PDSN 之间的接口, A13接口是 AN之间的会话迁移接口, A16接口是 AN之间的硬 切换接口, A12 接口是 AN 与 AN 鉴权授权计费服务器 (Authentication
Authorization Accounting, 简称 AAA) 之间的接口, A8/A 9是: BSC与 PCF之 间交互的接口。
按照统计, 通信中 70 %的话务量发生在室内, 如何有效地增强室内覆 盖是运营商面临的难点问题。 通过增加室外宏基站部署可以增强室内覆盖 率, 但是将导致投资成本的巨大增加, 同时在站点选择、 机房建设、 传输 费用和网络优化等方面也存在各种问题。 一种可行的解决方案是采用宏网 络进行室外普遍覆盖, 室内使用家庭接入点 (Access Point, 简称 AP) 进行 覆盖, 传输使用数字用户环路(Digital Subscriber Loop, 简称 DSL)宽带网络。 家庭 AP做到即插即用, 减少传输和网络规划成本。 为此业界提出了超小型 蜂窝(Femto cell)的概念,指通过 xDSL宽带网络或者因特网作为传输承载, 兼容现有终端, 提供家庭室内覆盖的解决方案。 如图 2所示为现有技术中超 小型蜂窝网络架构示意图, 超小型接入点 (Femto Access Point, 简称 FAP) 通过调制解调器或家庭网关 (Home GateWay, 简称 HGW) 接入到互联网, 然后通过超小型网关 (Femto GateWay, 简称 FGW) 接入到宏网络 (Macro Network) 。 图 2中, FAP实现了图 1中 BTS、 BSC和 PCF的功能。
在现有的宏网络上增加超小型蜂窝网络部署之后, 超小型蜂窝网络与 现有宏网络之间存在如下接口:
( 1 ) FAP提供 A10/A11接口通过 FGW接入现有宏网络中的 PDSN;
(2 )为了支持终端在超小型蜂窝网络与现有的宏网络之间的切换, FAP 需要提供 A13/A16接口通过 FGW接入现有宏网络;
( 3 ) FAP提供 A12接口接入现有宏网络的 AN-AAA。
通过 A10/A11接口, 为分组数据业务用户建立 PCF与 PDSN之间的承载 连接, 通过 A13接口可以实现 FAP与宏网络之间的会话迁移, 通过 A16接口 可以实现 FAP与宏网络之间的硬切换, 通过 A12接口可以实现 AT的接入鉴
AN、AN-AAA和 PDSN支持的接口数量有限,无法支持庞大数量的 FAP接入, 随着 FAP的增加, 需要增加宏网络网元部署, 导致成本增加。 每增加一个 FAP, 就需要宏网络侧的网元改变配置, 并会造成维护成本提高。 发明内容
本发明实施例针对现有技术存在的问题,提供一种超小型蜂窝网络与宏网 络之间进行通信的方法、 系统及超小型网关, 支持大量超小型蜂窝网络侧的 FAP接入到宏网络中, 而无需宏网络侧的网元改变配置, 能够降低维护成本。
本发明实施例提供一种超小型蜂窝网络与宏网络之间进行通信的方法,包 括:
将来自超小型接入点的消息 /数据中的源互联网协议地址替换成超小型网 关的互联网协议地址后发送到宏网络侧; 和 /或
将来自所述宏网络侧的消息 /数据中的目的互联网协议地址替换成所述超 小型接入点的互联网协议地址后发送到所述超小型接入点。
本发明实施例还提供一种超小型蜂窝网络与宏网络之间进行通信的方法, 包括:
超小型网关接收超小型接入点发送的用于请求鉴权的消息;
所述超小型网关根据所述用于请求鉴权的消息中的用户名字段, 将所述 用于请求鉴权的消息转发给接入网鉴权授权计费服务器。
本发明实施例还提供一种超小型网关, 包括:
接收模块, 用于接收来自宏网络侧或来自超小型接入点的消息 /数据; 地址替换模块, 用于将所述接收模块接收到的来自所述超小型接入点的消 息 /数据中的源互联网协议地址替换成所述超小型网关的互联网协议地址,或者 将来自所述宏网络侧的消息 /数据中的目的互联网协议地址替换成所述超小型 接入点的互联网协议地址;
发送模块,用于将经过所述地址替换模块进行地址替换后的消息 /数据发送
到所述宏网络侧或所述超小型接入点。
本发明实施例还提供一种超小型网关, 包括:
第二接收模块, 用于接收超小型接入点发送的用于请求鉴权的消息, 或接 收接入网鉴权授权计费服务器发送的用于表明鉴权通过的消息;
第二转发模块, 用于根据所述用于请求鉴权的消息中的用户名字段, 将接 收到的所述超小型接入点发送的用于请求鉴权的消息发送到所述接入网鉴权 授权计费服务器, 或根据所述用于表明鉴权通过的消息中的标识符字段, 将接 收到的所述接入网鉴权授权计费服务器发送的用于表明鉴权通过的消息发送 给所述超小型接入点。
本发明实施例还提供一种超小型蜂窝网络与宏网络之间进行通信的系统, 包括: 至少一个超小型接入点以及至少一个超小型网关,
所述超小型接入点用于向所述超小型网关发送消息 /数据,或接收所述超小 型网关发送的消息 /数据;
所述超小型网关用于接收来自宏网络侧或来自所述超小型接入点的消息 / 数据,将接收到的来自所述超小型接入点的消息 /数据中的源互联网协议地址替 换成所述超小型网关的互联网协议地址,或者将来自所述宏网络侧的消息 /数据 中的目的互联网协议地址替换成所述超小型接入点的互联网协议地址,将经过 地址替换后的消息 /数据发送到所述宏网络侧或所述超小型接入点。
本发明实施例通过将 FAP发送的消息 /数据中的源 IP地址转换成该 FAP接 入的 FGW的 IP地址, 并将宏网络侧发送的消息 /数据中的目的 IP地址转换成 相应的 FAP的 IP地址, 来实现 FAP与宏网络侧的消息 /数据交互, 不管有多少 个 FAP接入到一个 FGW, 对于宏网络侧来说都只呈现一个 FGW的 IP地址或 几个 FGW的 IP地址, 这样, 宏网络侧仅需存储记录关于该 FGW的信息, 而 无需由于多个 FAP的加入而改变配置, 可以节省维护成本。
下面通过附图和实施例, 对本发明的技术方案做进一歩的详细描述。
附图说明
图 1所示为现有技术中 HRPD网络架构示意图;
图 2所示为现有技术中超小型蜂窝网络架构示意图;
图 3所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例一 流程图;
图 4所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例二 流程图;
图 5所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例三 流程图;
图 6所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例四 流程图;
图 7所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例五 流程图;
图 8所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例六 流程图;
图 9所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例七 流程图;
图 10所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 八流程图;
图 11所示为本发明超小型网关实施例一结构示意图;
图 12所示为本发明超小型网关实施例二结构示意图;
图 13所示为本发明超小型网关实施例三结构示意图;
图 14所示为本发明超小型网关实施例四结构示意图;
图 15所示为本发明超小型网关实施例五结构示意图。 具体实施方式
如图 3所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 一流程图, 具体包括:
歩骤 101、将 FAP发送的消息 /数据中的源 IP地址转换成 FAP接入的 FGW 的互联网协议 (Internet Protocol, 简称 IP) 地址后发送到宏网络侧;
歩骤 102、 将宏网络侧发送的消息 /数据中的目的 IP地址转换成 FAP的 IP 地址并将经过处理后的消息 /数据发送到超小型接入点。
本发明实施例一通过将 FAP发送的消息 /数据中的源 IP地址转换成该 FAP 接入的 FGW的 IP地址, 并将宏网络侧发送的消息 /数据中的目的 IP地址转换 成相应的 FAP的 IP地址, 来实现 FAP与宏网络侧的消息 /数据交互, 不管有多 少个 FAP接入到一个 FGW, 对于宏网络侧来说都只呈现一个 FGW的 IP地址 或几个 FGW的 IP地址, 这样, 宏网络侧仅需存储记录关于该 FGW的信息, 而无需由于多个 FAP的加入而改变配置(即存储记录每一个 FAP的信息), 可 以节省维护成本。
如图 4所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 二流程图, 具体包括:
歩骤 201、将宏网络侧发送的消息 /数据中的目的 IP地址转换成相应的 FAP 的 IP地址后发送到 FAP;
歩骤 202、将 FAP发送的消息 /数据中的源 IP地址转换成 FAP接入的 FGW 的 IP地址, 并将经过处理后的消息 /数据发送给宏网络侧。
本发明实施例二通过将宏网络侧发送的消息 /数据中的目的 IP地址转换成 相应的 FAP的 IP地址,并将 FAP发送的消息 /数据中的源 IP地址转换成该 FAP 接入的 FGW的 IP地址, 来实现 FAP与宏网络侧的消息 /数据交互, 不管有多 少个 FAP接入到一个 FGW, 对于宏网络侧来说都只呈现一个 FGW的 IP地址 或几个 FGW的 IP地址, 这样, 宏网络侧仅需存储记录关于该 FGW的信息, 而无需由于多个 FAP的加入而改变配置(即存储记录每一个 FAP的信息), 可 以节省维护成本。
实施例一适用于 FAP侧发起消息 /数据传输的情况, 实施例二适用于宏网 络侧发起消息 /数据传输的情况。
由于涉及到根据多种接口进行的 FAP与宏网络侧的消息 /数据交互, 下面 分情况对基于每种接口进行消息 /数据交互时的具体歩骤进行说明。
一、 基于 A10/A11接口进行 FAP与宏网络侧消息 /数据交互
如图 5所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 三流程图, 该实施例三所示的是 FAP与宏网络侧的 PDSN之间进行消息 /数据 交互的具体流程。 根据 A10/A11接口的定义, PDSN以 PCF IP地址和关键值 (A10 KEY)标识一个 A10连接(本发明实施例中超小型蜂窝网络侧与宏网络 侧之间的连接为通信连接), 在本实施例三中, 对于每一个连接, FGW会重新 分配一个关键值(A10 KEY),为了区别 FAP分配的关键值(A10 KEY)和 FGW 分配的关键值(A10 KEY), 本实施例中用第一关键值(FAP— A10— KEY)表示 FAP分配的关键值(A10 KEY), 用第二关键值(FGW— A10— KEY)表示 FGW 分配的关键值 (A10 KEY)。 实施例三具体包括:
歩骤 301、 FAP发送 FAP的 Al 1注册请求消息( Al 1 -Registration Request ) 到 FGW, 其中该 All注册请求消息中包含 FAP分配的第一关键值。
歩骤 302、 FGW接收来自 FAP 的 All 注册请求消息 ( Al 1 -Registration Request), 如果经过判断确定是新的 A10连接建立请求消息, 则 FGW为该连 接分配一个第二关键值 (FGW— A10— KEY ) , 如果该 All 注册请求消息 (All -Registration Request) 中包含多个 FAP分配的第一关键值 (FAP— A10— KEY), 贝 lj FGW需要分配多个第二关键值 (FGW— A10— KEY) 与该多个 FAP 分配的第一关键值 (FAP— A10— KEY) 相对应; 然后 FGW将 All注册请求消 息 (All -Registration Request) 中的转交地址替换为 FGW的 IP地址, 用第二 关键值 (FGW— A10— KEY) 替换 FAP分配的第一关键值 (FAP— A10— KEY) , 重新计算 All 注册请求消息 (All -Registration Request) 的消息摘要算法 5 (Message-Digest Algorithm 5 , MD5)认证值(MD5消息摘要用于消息的完整
性保护, 接收端收到后, 会采用与发送端相同的算法计算 MD5消息摘要 (根 据消息内容和共享密钥计算 MD5消息摘要), 与消息中的消息摘要比较, 如果 相等, 说明消息没有被恶意修改。 因 FGW修改了关键值、 转交地址, 所以应 该在修改完成后重新计算 MD5消息摘要, 放到消息中的相应信息单元中, 再 进行后续的消息处理歩骤), 将该消息中的 IP包的源地址替换为 FGW的 IP地 址, 然后将经过处理之后的消息发送到宏网络侧的 PSDN。
歩骤 303、PSDN发送 All注册应答消息(All-Registration Reply)给 FGW。 歩骤 304、 FGW在收到该 All注册应答消息(All -Registration Reply)后, 将该消息中的第二关键值(FGW— A10— KEY)替换成 FAP为该连接分配的第一 关键值( FAP— A10— KEY ),重新计算 Al 1注册应答消息( Al 1 -Registration Reply ) 的 MD5认证值, 将该消息中的 IP包的目的 IP地址替换为发送 All注册请求 消息 (All-Reistration Request) 的 FAP的 IP地址 (All注册请求消息和 All 注册应答消息中包含有国际移动用户识别码 (International Mobile Subscriber Identity, 简称 IMSI), 通过该 IMSI, FGW可以获知 All注册请求消息和 All 注册应答消息的对应关系, 从而 FGW可以确定将 All注册应答消息中的 IP 包的目的 IP地址替换为哪一个 FAP的 IP地址,以及确定将 All注册应答消息 中的第二关键值替换为哪一个第一关键值) ; 如果该 All 注册应答消息 (All -Registration Reply) 中指示 PDSN接受连接建立, 则还需要建立第二关 键值 (FGW— A10— KEY) 和 FGW的 IP地址与第一关键值 (FAP— A10— KEY) 和 FAP的 IP地址的映射关系, 即一个第一关键值 (FAP— A10— KEY) 和 FAP 的 IP地址的组合, 对应一个第二关键值 (FGW— A10— KEY) 和 FGW的 IP地 址的组合, 供后续的 FAP与 PDAN之间进行数据交互使用; 然后 FGW将经过 处理的 All注册应答消息 (All -Registration Reply) 发送到相应的 FAP。
对于后续的 FAP与宏网络之间交互的消息(图 3中未示出)也需要进行类 似的替换 A10— KEY、 替换 FAP的 IP地址、 替换 FAP到 PDSN消息中的转交 地址、 重新生成 MD5认证值等操作。
基于 All接口进行完 FAP与 PDSN之间的消息交互建立 A10连接之后, FAP与 PDSN开始进行数据交互。 具体包括如下歩骤:
歩骤 305、 FAP 发送 A10 通用路由封装包 ( A10 Generic Routing Encapsulation Packet, 简称 A10 GRE Packet) 到 FGW。
歩骤 306、 FGW在接收到该 A10 GRE包 (A10 GRE Packet) 之后, 根据 歩骤 304中建立的第二关键值(FGW— A10— KEY)和 FGW的 IP地址与第一关 键值(FAP— A10— KEY)和 FAP的 IP地址的映射关系, 将该 A10 GRE包(A10 GRE Packet) 中的源 IP 地址替换为相应的 FGW 的 IP 地址, 第一关键值 (FAP A10 KEY) 替换为相应的第二关键值 (FGW— A10— KEY), 然后 FGW 将经过处理之后的 A10 GRE包 (A10 GRE Packet) 发送到 PDSN。
歩骤 307、 PDSN发送 A10 GRE包 ( A10 GRE Packet) 到 FGW。
歩骤 308、 FGW接收到 PDSN发送的 A10 GRE包 (A10 GRE Packet) 之 后, 根据歩骤 304中建立的第二关键值(FGW— A10— KEY)和 FGW的 IP地址 与第一关键值(FAP— A10— KEY)和 FAP的 IP地址的映射关系,将该 A10 GRE 包 (Al O GRE Packet) 中的目的 IP地址替换为相应的 FAP的 IP地址, 第二关 键值 (FGW— A10— KEY) 替换为相应的第一关键值 (FAP— A10— KEY) ; 然后 FGW将经过处理之后的 A10 GRE包 (A10 GRE Packet) 发送到 FAP。
本发明实施例三通过将 FAP发送给 PDSN的消息中的源 IP地址替换为 FGW的 IP地址, 将 FAP为连接分配的第一关键值 (FAP— A10— KEY) 替换为 FGW分配的第二关键值(FGW— A10— KEY),将 PDSN发送给 FAP的消息中的 目的 IP地址,替换为相应的 FAP的 IP地址,将第二关键值(FGW— A10— KEY) 替换为第一关键值 (FAP— A10— KEY) , 这样, 对于 PDSN来说只呈现 FGW的 IP地址, 无需改变配置信息, 同时又能实现 FAP与 PDSN之间的消息交互。
二、 A13/A16接口进行 FAP与宏网络侧消息交互
接入终端单播标识( Unicast Access Terminal Identifier, 简称 UATI )是 FAP 为接入终端 AT分配的标识, 有 UATI128和 UATI32两种格式, 把 UATI的高
104 位 UATI104 替换成色码 (Color Code) , 色码的长度为 8 位, 即色码和 UATI024形成了 UATI32, 基于 A16接口的消息中的 AT标识用 UATI32, 基于 A13接口的消息中的 AT标识用 UATI128。
由于一个 FGW可能有多个 FAP接入, 各 FAP分配的 UATI可能相同。在 基于 A13/A16接口进行 FAP与宏网络侧消息的交互时,需要建立 UATI与 FAP 的对应关系。 为了保证 FGW下的各 FAP分配的 UATI的唯一性, 将 UATI024 拆分成两部分, 即 FAP— Index和 UATI— FAP, FAP— Index是 UATI024的高 m比 特, 表示 FAP索引, 在子网内是唯一的; UATI— FAP是 UATI的低 n比特, 在 FAP内唯一, 由 FAP分配, 其中 n=24-m, m和 n均为自然数。在 FAP启动时, FGW将 FAP所属的子网标识(UATI104和色码)和 FAP索引配置给 FAP, 供 FAP给 AT分配 UATI时使用,这样就能保证每个 FAP分配的 UATI是唯一的。
图 6所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例四 流程图, 该实施例四所示的是 FAP到宏网络中的 AN的激活态切换过程, 具体 包括:
歩骤 401、 FAP发送 A16会话迁移请求消息( A16-Session Transfer Request) 到 FGW。FAP可以确定一个目标 AN,在该 A16会话迁移请求消息( A16-Session Transfer Request) 中目的 IP地址为目标 AN的 IP地址, 目的端口号为 A16知 名端口号。
歩骤 402、 FGW在收到 FAP发送的 A16会话迁移请求消息 (A16-Session Transfer Request)后, 记录该消息中的 AT-ID与 FAP的对应关系; 该 AT-ID为 A16会话迁移请求消息中的一个信息单元, 是 FAP为 AT分配的标识, 在后续 的 FAP与 AN之间交互的消息中都会携带该 AT-ID, 该 AT-ID是长度为 32比 特的 UATI;然后 FGW将 A16会话迁移请求消息( A16-Session Transfer Request) 中的源 IP地址替换为 FGW的 IP地址, 然后将替换处理后的 A16会话迁移请 求消息 (A16-Session Transfer Request) 发送到 AN。
歩骤 403、 AN发送 A16会话迁移响应消息( A16-Session Transfer Response)
到 FGW。
歩骤 404、 FGW收到 AN发送的 A16会话迁移响应消息 (A16-Session Transfer Response) 后, 根据该消息中的 AT-ID查询歩骤 402中记录的 AT-ID 与 FAP的对应关系, 查找到相应的 FAP, 然后用相应的 FAP的 IP地址替换该 消息中的目的 IP地址,并将经过处理后的 A16会话迁移响应消息(A16-Session Transfer Response ) 发送到相应的 FAP。
歩骤 405、 FAP 发送 A16 会话迁移完成消息 (A16-Session Transfer Complete) 到 FGW。
歩骤 406、 FGW在收到 FAP发送的 A16会话迁移完成消息 (A16-Session Transfer Complete )后, 替换该消息中的源 IP地址为 FGW的 IP地址, 然后将 经过替换处理后的 A16会话迁移完成消息(A16-Session Transfer Complete)发 送到 AN。
歩骤 407、 AN发送 A16会话释放指示消息( A16-Session Release Indication) 给 FGW。
歩骤 408、 FGW在收到 AN发送的 A16会话释放指示消息 (A16-Session
Release Indication) 后, 根据该消息中的 AT-ID查询歩骤 402中记录的 AT-ID 与 FAP的对应关系, 查找到相应的 FAP, 然后用相应的 FAP的 IP地址替换该 消息中的目的 IP地址,并将经过处理后的 A16会话释放指示消息(A16-Session Release Indication) 发送到相应的 FAP。
歩骤 409、 FAP 发送 A16 会话释放指示确认消息 (A16-Session Release
Indication ACK) 给 FGW。
歩骤 410、 FGW 在收到 FAP 发送的 A16 会话释放指示确认消息 (A16-Session Release Indication ACK )后, 如果该消息中的 AT-ID不是生成长 码掩码的 UATI ( Long Code Mask UATI,简称 LCM— UATI ) (该消息中的 AT-ID 不是 LCM— UATI表明后续不会有消息发送到该 FAP) , 则 FGW释放歩骤 402 中记录的 AT-ID与 FAP之间的对应关系,如果该消息中的 AT-ID是 LCM— UATI
(该消息中的 AT-ID是 LCM— UATI表明后续还会有消息发送到该 FAP), 则不 释放歩骤 402中记录的 AT-ID与 FAP之间的对应关系; 因为后续歩骤中 A13 保活请求消息(A13-Keep Alive Request )、 A13保活响应消息(A13 -Keep Alive Response ) A13资源释放请求消息 (A13-Resource Release Request) 以及 A13 资源释放响应消息 (A13 -Resource Release Response) 只发送到 LCM— UATI对 应的 FAP; 然后 FGW将 A16会话释放指示确认消息 (A16-Session Release Indication ACK) 中的源 IP地址替换为 FGW的 IP地址, 并将经过处理后的消 息发送到 AN。
歩骤 411、 AN发送 A13保活请求消息(A13 -Keep Alive Request)到 FGW。 歩骤 412、 FGW在收到 AN发送的 A13保活请求消息 (A13-Keep Alive
Request) 后, 根据该消息中的 AT-ID查询歩骤 402中记录的 AT-ID与 FAP的 对应关系, 查找到相应的 FAP, 然后用相应的 FAP的 IP地址替换该消息中的 目的 IP地址, 并将经过处理后的 A13保活请求消息(A13-Keep Alive Request) 发送到相应的 FAP。
歩骤 413、FAP发送 A13保活响应消息( A13-Keep Alive Response)到 FGW。 歩骤 414、 FGW在收到 FAP发送的 A13保活响应消息 (A13-Keep Alive Response) 后, 替换该消息中的源 IP地址为 FGW的 IP地址, 然后将经过替 换处理后的 A13保活响应消息 (A13-Keep Alive Response) 发送到 AN。
歩骤 415、 AN发送 A13资源释放请求消息(A13-Resource Release Request) 到 FGW。
歩骤 416、 FGW在收到 AN发送的 A13资源释放请求消息( A13-Resource Release Request) 之后, 根据该消息中 UATI128得到 AT-ID (FGW需要配置 UATI104与色码的对应关系), 然后根据 AT-ID查询歩骤 402中记录的 AT-ID 与 FAP的对应关系, 查找到相应的 FAP, 然后用相应的 FAP的 IP地址替换该 消息中的目的 IP 地址, 并将经过处理后的 A13 资源释放请求消息 (A13-Resource Release Request) 发送到相应的 FAP。
歩骤 417、 FAP 发送 A13 资源释放响应消息 (A13 -Resource Release Response ) 到 FGW。
歩骤 418、FGW在接收到 FAP发送的 A13资源释放响应消息(A13-Resource Release Response) 后, 替换该消息中的源 IP地址为 FGW的 IP地址, 然后将 经过替换处理后的 A13资源释放响应消息 (A13-Resource Release Response发 送到 AN, 并释放 AT-ID与 FAP的对应关系。
本发明实施例四中,首先建立了 AT-ID与 FAP之间的对应关系,对于来自 FAP的消息, 将消息中的源 IP地址替换为 FGW的 IP地址, 对于来自 AN的 消息, 基于消息中的 AT-ID, 通过查询 AT-ID与 FAP之间的对应关系, 找到唯 一的一个 FAP, 然后将来自 AN的消息中的目的 IP替换为相应的 FAP的 IP地 址, 这样就实现了 AN与 FAP之间的消息交互, 对于 AN来说呈现的是 FGW 的 IP地址, 不管有多少个 FAP, AN中的网元均无需改变配置, 降低了维护成 本。
图 7所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例五 流程图, 该实施例五所示的是 AN到 FAP的激活态切换过程, 切换是由 AN发 起的, FGW在确定目标 FAP之后会建立 AT-ID与 FAP之间的对应关系,供 FAP 与 AN之间消息交互时查找使用, 对于来自 AN的消息, 就将消息中的目的 IP 地址,通过查询 AT-ID与 FAP的关系,替换为与消息中的 AT-ID相对应的 FAP 的 IP地址,对于来自 FAP的消息, FGW将消息中的源 IP地址替换为 FGW的 IP地址, 这样就可以实现 FAP与 AN之间的消息交互。 实施例五与实施例四 不同之处在于: 实施例五中, 歩骤 513中 AN发送给 FGW的 A13保活响应消 息 (A13-Keep Alive Response) 中不携带 AN分配的 AT-ID, 而是携带 FAP分 配的 UATI128, 所以在歩骤 512中 FGW接收到 FAP发送的消息后, 需要建立 消息中的 UATI128与 FAP的对应关系, 供歩骤 513中 FGW确定目标 FAP时 使用。
本发明实施例五中, 建立了 AT-ID与 FAP之间的对应关系和 UATI128与
FAP之间的对应关系,对于来自 FAP的消息,将消息中的源 IP地址替换为 FGW 的 IP地址, 对于来自 AN的消息, 基于消息中的 AT-ID或 UATI128, 通过查 询 AT-ID或 UATI128与 FAP之间的对应关系, 找到唯一的一个 FAP, 然后将 来自 AN的消息中的目的 IP替换为相应的 FAP的 IP地址, 这样就实现了 AN 与 FAP之间的消息交互, 对于 AN来说呈现的是 FGW的 IP地址, 不管有多 少个 FAP, AN中的网元均无需改变配置, 降低了维护成本。
三、 基于 A13接口进行 FAP与宏网络侧消息交互
如图 8所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 六流程图, 该实施例六所示的是 FAP到宏网络中的 AN的会话迁移切换过程, 具体包括:
歩骤 601、 AN发送 A13会话信息请求 (A13-Session Information Request) 到 FGW。
歩骤 602、 FGW在接收到 AN发送的 A13 会话信息请求 (A13-Session Information Request) 后, 根据该消息中的子网标识 (UATI104) , 由子网标识 和 FAP的索引查找对应的 FAP, 将该消息中的目的 IP地址替换为对应的 FAP 的 IP地址, 并将经过替换处理的消息发送给 FAP。
歩骤 603、 FAP 发送 A13 会话信息响应消息 (A13-Session Information Response ) 到 FGW。
歩骤 604、 FGW在接收到 FAP发送的 A13会话信息响应消息(A13-Session Information Response) 后, 将该消息中的源 IP地址替换为 FGW的 IP地址, 并将经过替换处理后的消息发送到 AN。
歩骤 605、 AN 发送 A13 会话信息确认消息 (A13 -Session Information Confirmation ) 到 FGW。
歩骤 606、 FGW在收到 AN发送的 A13会话信息确认消息 (A13-Session Information Confirmation)后, 根据该消息中的子网标识(UATI104) , 由子网 标识和 FAP的索引查找对应的 FAP,将该消息中的目的 IP地址替换为对应的
FAP的 IP地址, 并将经过替换处理的消息发送给 FAP。
本发明实施例六中,会话迁移由 AN发起, FGW根据子网标识(UATI104) 查找到对应的 FAP的 IP地址,将 AN发送过来的消息中的目的 IP地址用查找 到的对应的 FAP的 IP地址替换,对于来自 FAP的消息,将消息中的源 IP地址 用 FGW的 IP地址替换, 这样就可以实现 FAP到 AN的会话迁移, 而无需网 络侧网元改变配置, 并节省了网络维护成本。
在实施例六中, 由于会话迁移不是必须的, 所以歩骤 602中, FGW在接 收到 AN发送的 A13会话信息请求 (A13-Session Information Request) 后, 可 以向 AN发送 A13会话信息拒绝消息 ( A13-Session Information Reject), 触发 AN与 AT重新协商会话, FAP上的会话可以通过标准的会话保活机制释放。
如图 9所示为本发明超小型蜂窝网络与宏网络之间进行通信的方法实施例 七流程图, 该实施例七所示的是宏网络中的 AN到 FAP的会话迁移切换过程, 具体包括:
歩骤 701、 FAP发送 A13会话信息请求(A13-Session Information Request) 到 FGW。
歩骤 702、 FGW在接收到 FAP发送的 A13会话信息请求 (A13-Session Information Request) 后, 根据该消息中的 UATI128, 建立 UATI128和 FAP的 对应关系, 将该消息中的源 IP地址替换为 FGW的 IP地址, 并将经过替换处 理的消息发送给 AN。
歩骤 703、 AN 发送 A13 会话信息响应消息 (A13 -Session Information
Response ) 到 FGW。
歩骤 704、 FGW在接收到 AN发送的 A13会话信息响应消息( A13-Session Information Response)后, 根据该消息中的 UATI128, 查找歩骤 702中建立的 UATI128与 FAP的对应关系找到对应的 FAP,将该消息中的目的 IP地址替换 为相应的 FAP的 IP地址, 并将经过替换处理后的消息发送到相应的 FAP。
歩骤 705、 FAP 发送 A13 会话信息确认消息 (A13-Session Information
Confirmation ) 到 FGW。
歩骤 706、 FGW在收到 FAP发送的 A13会话信息确认消息 ( A13-Session Information Confirmation)后,将该消息中的源 IP地址替换为 FGW的 IP地址, 并将经过替换处理的消息发送给 AN。
本发明实施例七中, 会话迁移由 FAP发起, FGW根据 FAP发送的消息中 的 UATI128建立 UATI128与 FAP的对应关系, 供后续的 FAP与 AN之间交互 的消息使用, 对于来自 FAP的消息, FGW将消息中的源 IP地址用 FGW的 IP 地址替换,对于来自 AN的消息, FGW通过查询 UATI128与 FAP的对应关系, 查找到相应的 FAP,用查找到的相应的 FAP的地址替换 AN发送的消息中的目 的 IP地址, 这样就可以实现 AN到 FAP的会话迁移, 而无需网络侧网元改变 配置, 并节省了网络维护成本。
四、 基于 A12接口进行 FAP与宏网络侧消息交互
FAP通过 A12接口到 AN-AAA进行鉴权, 可以将 FGW作为一个代理 AN-AAA, 在 FAP发送的消息中将 AN-AAA的 IP地址设置为 FGW的 IP地 址, 从而实现 FAP与宏网络侧的 AN-AAA之间的消息交互。
如图 10所示为本发明超小型蜂窝网络接入点与宏网络之间消息交互方法 实施例八流程图, 该实施例八所示的是 FAP到宏网络中的 AN-AAA的鉴权过 程, 具体包括:
歩骤 801、 FAP 发送用于请求鉴权的 A12 接入请求消息 (A12 Access Request) 到 FGW。
其中, 由于本实施例中 FGW用来作为代理 AN-AAA, 所以 A12接入请求 消息的目的 IP地址为 FGW的 IP地址,源 IP地址为 FAP的 IP地址,并且 A12 接入请求消息中包含 FAP为该 A12接入请求消息分配的第一标识符 (Identifier) (存储在该 A12接入请求消息的标识符字段中), 以及"用户名 (User-Name) " 字段、 "CHAP(Challenge-Handshake Authentication Protocol , 挑战握手鉴权协 议) -Password"和 " CHAP-Challenge "属性等, 所述 " CHAP-Password "属性
包含来自接入终端 AT的 CHAP标识和 CHAP响应。
歩骤 802、FGW在收到 FAP发送的 A12接入请求消息( A12 Access Request) 后,根据该 A12接入请求消息(A12 Access Request)中的"用户名(User-Name) " 字段将该消息转发给相应的 AN-AAA。
具体地, FGW在收到 FAP发送的 A12接入请求消息后, 为 A12接入请求 消息分配第二标识符(Identifier), 以第二标识符作为索引保存本次鉴权的上下 文信息 (如 FAP 的 IP地址, 第一标识符 (Identifier) 等), 并用第二标识符 (Identifier) 替换 A12 接入请求消息中的第一标识符 (Identifier) , 并将 A12 接入请求消息的目的 IP 地址替换为根据用户名 (User-Name ) 字段确定的 AN-AAA的 IP地址,源 IP地址替换为 FGW的 IP地址后,将 A12接入请求消 息发送给相应的 AN-AAA。
歩骤 803、 AN-AAA接收 A12接入请求消息, 对接入终端 AT进行接入鉴 权处理, 完成接入终端 AT的接入鉴权处理后, 向 FGW发送用于表明鉴权通 过的 A12接入接受消息 ( A12 Access Accept )。
具体地, AN-AAA接收 A12接入请求消息, AN-AAA利用 A12接入请求 消息中的用户名 (User-Name) 对应的密钥、 CHAP标识和 CHAP-Challenge, 计算 CHAP响应, 并与 A12接入请求消息中的 CHAP响应进行比较, 如果相 同, 则对接入终端 AT 的接入鉴权通过, 设置 A12 接入接受消息的标识符 (Identifier)为 A12接入请求消息中的第二标识符(Identifier) (即将第二标识 符存储在 A12 接入接受消息的标识符字段中), 并利用 AN-AAA 中预设的 AN-AAA和 FGW之间的共享密钥生成第一响应验证码, 并将第一响应验证码 携带在 A12接入接受消息中发送给 FGW,其中该 A12接入接受消息的目的 IP 地址为 FGW的 IP地址, 源 IP地址为 AN-AAA的 IP地址。
歩骤 804、 FGW接收到 A12接入接受消息(A12 Access Accept)后, 根据 A12接入接受消息中的标识符(Identifier)字段, 将该消息发送给相应的 FAP。
具体地, FGW接收到 A12接入接受消息后, FGW利用 FGW中预设的
FGW和 AN-AAA之间的共享密钥计算响应验证码, 并判断该响应验证码与 A12 接入接受消息中携带的第一响应验证码是否相同, 如果相同 (表示验证 成功), 则根据 A12接入接受消息中的第二标识符 (Identifier) 索引上下文信 息, 获取 FGW保存的第一标识符 (Identifier) 和 FAP的 IP地址, 并用获取 的第一标识符(Identifier)替换 A12接入接受消息中的第二标识符(Identifier), 利用 FGW中预设的 FGW和 FAP之间的共享密钥生成第二响应验证码替换 A12接入接受消息中的第一响应验证码, 并将 A12接入接受消息中的目的 IP 地址替换为 FAP的 IP地址, 源 IP地址替换为 FGW的 IP地址后, 将 A12接 入接受消息发送给相应的 FAP; 如果不相同, 则不处理。 本发明实施例八通 过将 FGW作为一个代理 AN-AAA, 将 FAP发送的消息中的目的 IP地址设置 为 FGW的 IP地址, FGW将来自 FAP的消息转发到 AN-AAA,将来自 AN-AAA 的消息转发到 FAP, 这样就可以实现 FAP到 AN-AAA的鉴权, 而无需宏网络 侧网元改变配置, 并节省了网络维护成本。
如图 11所示为本发明超小型网关实施例一结构示意图, 该网关具体包括: 接收模块 11, 用于接收来自宏网络侧或来自超小型接入点的消息 /数据; 地址 替换模块 12, 用于将来自超小型接入点的消息 /数据中的源 IP地址替换成超小 型蜂窝网关的 IP地址,或者将来自宏网络侧的消息 /数据中的目的 IP地址替换 成超小型接入点的 IP地址; 发送模块 13, 用于将经过地址替换模块 12进行地 址替换后的消息 /数据发送到宏网络侧或超小型接入点。
如图 12所示为本发明超小型网关实施例二结构示意图, 在图 11所示结构 的基础上, 本实施例二超小型网关还包括: 关键值分配模块 18, 与接收模块 11连接, 用于在接收模块 11接收到来自超小型接入点的注册请求消息之后, 为新的通信连接分配第二关键值; 第一映射模块 14, 与关键值分配模块 18、 地址替换模块 12 以及接收模块 11 连接, 用于建立第二关键值 (FGW— A10— KEY)和 FGW的 IP地址与接收到的注册请求消息中的第一关键 值 (FAP— A10— KEY) 和 FAP的 IP地址的映射关系; 转交地址替换模块 17,
与第一映射模块 14以及接收模块 11连接, 用于将接收模块 11接收到的消息 中的转交地址用超小型网关的 IP地址替换; 关键值替换模块 16, 与转交地址 替换模块 17、 第一映射模块 14、 地址替换模块 12以及接收模块 11连接, 用 于将经过转交地址替换模块 17处理后的消息以及接收模块接收到的数据, 根 据第一映射模块 14建立的第二关键值 (FGW— A10— KEY) 和 FGW的 IP地址 与第一关键值(FAP— A10— KEY)和 FAP的 IP地址的映射关系, 将来自宏网络 侧的消息 /数据中的第二关键值用第一关键值替换,将来自超小型接入点的消息 /数据中的第一关键值用第二关键值替换,并将经过处理后的数据发送到地址替 换模块 12; 认证值生成模块 15, 与关键值替换模块 16以及地址替换模块 12 连接, 用于重新生成经过关键值替换模块 16处理后的消息的消息摘要算法五 认证值, 并将经过处理后的消息发送到地址替换模块 12。
其中, 关键值替换模块 16可以包括:
第一关键值替换模块 161, 与第一映射模块 14以及接收模块 11连接, 用 于将接收模块 11接收到的数据, 根据第一映射模 14块建立的第二关键值和超 小型网关的互联网协议地址与第一关键值和超小型接入点的互联网协议地址 的映射关系, 将来自宏网络侧的数据中的第二关键值用第一关键值替换, 将来 自超小型接入点的数据中的第一关键值用第二关键值替换;
第二关键值替换模块 162, 与第一映射模块 14、 转交地址替换模块 17以 及认证值生成模块 15连接, 用于将经过转交地址替换模块 17处理后的消息, 根据第一映射模块 14建立的第二关键值和超小型网关的互联网协议地址与第 一关键值和超小型接入点的互联网协议地址的映射关系,将来自宏网络侧的消 息中的第二关键值用第一关键值替换, 将来自超小型接入点的消息中的第一关 键值用第二关键值替换, 并将经过处理后的消息发送到认证值生成模块。
其中, 地址替换模块 12可以包括:
第一地址替换模块 121, 与第一关键值替换模块 161、 第一映射模块 14以 及发送模块 13连接, 用于将经过第一关键值替换模块 161处理后的数据, 根
据第一映射模块 14建立的第二关键值和超小型网关的互联网协议地址与第一 关键值和超小型接入点的互联网协议地址的映射关系,将来自宏网络侧的数据 中的目的互联网协议地址用超小型接入点的互联网协议地址替换,将来自超小 型接入点的数据中的源互联网协议地址用超小型网关的互联网协议地址替换, 并将经过处理后的数据发送到发送模块 13;
第二地址替换模块 122, 与认证值生成模块 15、 第一映射模块 14以及发 送模块 13连接, 用于将经过认证值生成模块 15处理后的消息, 根据第一映射 模块 14建立的第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自宏网络侧的消息中的目的互 联网协议地址用超小型接入点的互联网协议地址替换, 将来自超小型接入点的 消息中的源互联网协议地址用超小型网关的互联网协议地址替换, 并将经过处 理后的消息发送到发送模块 13。
如图 13所示为本发明超小型网关实施例三结构示意图, 在图 11所示结构 的基础上, 本实施例三中超小型网关还包括: 第二映射模块 20, 用于根据接收 模块 11接收到的来自超小型接入点或宏网络侧的消息中的接入终端单播标识, 建立接入终端单播标识与超小型接入点的对应关系。
如图 14所示为本发明超小型网关实施例四结构示意图, 在图 11所示结构 的基础上, 本实施例四中超小型网关还包括: 索引配置模块 21, 用于存储超小 型接入点所属的子网标识和索引配置, 并将存储的超小型接入点所属的子网标 识和索引配置发送给超小型接入点, 并用于地址替换模块 12查询。
如图 15 所示为本发明超小型网关实施例五结构示意图, 如果需要通过 FGW作为代理 AN-AAA, 则 FGW的结构如图 15所示, 该 FGW包括: 第二接收模块 31,用于接收超小型接入点发送的用于请求鉴权的消息,或接收 接入网鉴权授权计费服务器发送的用于表明鉴权通过的消息; 第二转发模块 32, 用于根据用于请求鉴权的消息中的用户名字段, 将接收到的超小型接入点 发送的用于请求鉴权的消息发送到接入网鉴权授权计费服务器, 或根据用于表
明鉴权通过的消息中的标识符字段, 将接收到的接入网鉴权授权计费服务器发 送的用于表明鉴权通过的消息发送给超小型接入点。
本发明实施例还提供一种超小型蜂窝网络与宏网络之间进行通信的系统, 该系统可以包括至少一个 FAP和至少一个 FGW, 其中 FGW可以是如图 11、 12、 13、 14或 15中所示的 FGW。
本发明实施例通过将 FAP发送的消息 /数据中的源 IP地址转换成该 FAP接 入的 FGW的 IP地址, 并将宏网络侧发送的消息 /数据中的目的 IP地址转换成 相应的 FAP的 IP地址, 来实现 FAP与宏网络侧的消息 /数据交互, 不管有多少 个 FAP接入到一个 FGW,对于宏网络侧来说都只呈现一个 FGW的 IP地址(如 果多个 FAP分别接入到不同的 FGW, 则对宏网络侧来说呈现几个 FGW的 IP 地址), 这样, 宏网络侧仅需存储记录关于该 FGW 的信息, 而无需由于多个 FAP的加入而改变配置, 可以节省维护成本。 最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员 应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的 本质脱离本发明各实施例技术方案的精神和范围。
Claims
1、 一种超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于, 包 括:
将来自超小型接入点的消息 /数据中的源互联网协议地址替换成超小型网 关的互联网协议地址后发送到宏网络侧; 和 /或
将来自所述宏网络侧的消息 /数据中的目的互联网协议地址替换成所述超 小型接入点的互联网协议地址后发送到所述超小型接入点。
2、根据权利要求 1所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于,将来自超小型接入点的消息中的源互联网协议地址替换成超小型 网关的互联网协议地址具体包括:
为一个连接分配第二关键值;
建立所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,所述第一关键值为所述超小型接入 点为所述连接分配的;
将来自所述超小型接入点的消息中的转交地址用所述超小型网关的互联 网协议地址替换;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述超小型接入点的消息中 的第一关键值用所述第二关键值替换;
重新生成经过转交地址替换以及关键值替换后的消息的消息摘要算法五 认证值;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来重新生成了消息摘要算法五认 证值的消息中的源互联网协议地址用所述超小型网关的互联网协议地址替换。
3、根据权利要求 2所述的超小型蜂窝网络与宏网络之间进行通信的方法,
其特征在于,将来自所述宏网络侧的消息中的目的互联网协议地址替换成所述 超小型接入点的互联网协议地址具体包括:
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的消息中的第 二关键值用所述第一关键值替换;
重新生成经过关键值替换后的消息的消息摘要算法五认证值;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的消息中的目 的互联网协议地址用与所述第一关键值相对应的所述超小型接入点的互联网 协议地址替换。
4、根据权利要求 1所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于,将来自超小型接入点的数据中的源互联网协议地址替换成超小型 网关的互联网协议地址具体包括:
为一个连接分配第二关键值;
建立所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,所述第一关键值为所述超小型接入 点为所述连接分配的;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述超小型接入点的数据中 的第一关键值用所述第二关键值替换;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述超小型接入点的数据中 的源互联网协议地址用所述超小型网关的互联网协议地址替换。
5、根据权利要求 4所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于,将来自所述宏网络侧的数据中的目的互联网协议地址替换成所述 超小型接入点的互联网协议地址具体包括:
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的数据中的第 二关键值用第一关键值替换;
根据所述第二关键值和超小型网关的互联网协议地址与第一关键值和超 小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的数据中的目 的互联网协议地址用所述超小型网关的互联网协议地址替换。
6、根据权利要求 1所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于, 还包括:
提取来自所述超小型接入点或所述宏网络侧的消息中的接入终端单播标 识, 建立所述接入终端单播标识与所述超小型接入点的对应关系。
7、根据权利要求 6所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于,将来自所述宏网络侧的消息中的目的互联网协议地址替换成所述 超小型接入点的互联网协议地址后发送到所述超小型接入点具体为:
在接收到来自宏网络侧的消息后, 根据该消息中的接入终端单播标识, 通 过查询已经建立的所述接入终端单播标识与所述超小型接入点的对应关系, 查 找到与所述来自宏网络侧的消息中的接入终端单播标识相对应的所述超小型 接入点,用该查找到的所述超小型接入点的互联网协议地址替换所述来自宏网 络侧的消息中的目的互联网协议地址, 并将经过处理后的消息发送到所述超小 型接入点。
8、根据权利要求 1所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于, 还包括:
将超小型接入点所属的子网标识和索引配置发送给所述超小型接入点, 建 立所述子网标识和索弓 I配置与所述超小型接入点的对应关系。
9、根据权利要求 8所述的超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于,所述将来自所述宏网络侧的消息中的目的互联网协议地址替换成 所述超小型接入点的互联网协议地址后发送到所述超小型接入点具体为:
在接收到来自宏网络侧的消息后, 根据该消息中的子网标识, 结合所述索 引配置, 根据已经建立的所述子网标识和索引配置与所述超小型接入点的对应 关系, 查找到与该消息中的子网标识和索引配置相对应的超小型接入点, 将所 述来自宏网络侧的消息中的目的互联网协议地址用查找到的与该消息中的子 网标识和索引配置相对应的超小型接入点的互联网协议地址替换, 并将经过处 理后的来自宏网络侧的消息发送到所述查找到的与该消息中的子网标识和索 引配置相对应的超小型接入点。
10、 一种超小型网关, 其特征在于, 包括:
接收模块, 用于接收来自宏网络侧或来自超小型接入点的消息 /数据; 地址替换模块, 用于将所述接收模块接收到的来自所述超小型接入点的消 息 /数据中的源互联网协议地址替换成超小型网关的互联网协议地址,或者将来 自所述宏网络侧的消息 /数据中的目的互联网协议地址替换成超小型接入点的 互联网协议地址;
发送模块,用于将经过所述地址替换模块进行地址替换后的消息 /数据发送 到宏网络侧或超小型接入点。
11、 根据权利要求 10所述的超小型网关, 其特征在于, 还包括: 关键值分配模块,用于在所述接收模块接收到来自所述超小型接入点的注 册请求消息之后, 为新的通信连接分配第二关键值;
第一映射模块, 用于建立所述第二关键值和超小型网关的互联网协议地址 与接收到的注册请求消息中的第一关键值与所述超小型接入点的互联网协议 地址的映射关系;
转交地址替换模块,用于将接收模块接收到的消息中的转交地址用所述超 小型网关的互联网协议地址替换;
关键值替换模块,用于将经过所述转交地址替换模块处理后的消息以及接 收模块接收到的数据, 根据所述第一映射模块建立的第二关键值和超小型网关 的互联网协议地址与第一关键值和超小型接入点的互联网协议地址的映射关
系,将来自所述宏网络侧的消息 /数据中的第二关键值用第一关键值替换,将来 自所述超小型接入点的消息 /数据中的第一关键值用第二关键值替换,并将经过 处理后的数据发送到所述地址替换模块;
认证值生成模块, 与所述关键值替换模块以及地址替换模块连接, 用于重 新生成经过所述关键值替换模块处理后的消息的消息摘要算法五认证值, 并将 经过处理后的消息发送到所述地址替换模块。
12、 根据权利要求 11 所述的超小型网关, 其特征在于, 所述关键值替换 模块包括:
第一关键值替换模块, 用于将所述接收模块接收到的数据, 根据所述第一 映射模块建立的第二关键值和超小型网关的互联网协议地址与第一关键值和 超小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的数据中的 第二关键值用第一关键值替换,将来自所述超小型接入点的数据中的第一关键 值用第二关键值替换;
第二关键值替换模块, 用于将经过所述转交地址替换模块处理后的消息, 根据所述第一映射模块建立的第二关键值和超小型网关的互联网协议地址与 第一关键值和超小型接入点的互联网协议地址的映射关系,将来自所述宏网络 侧的消息中的第二关键值用第一关键值替换,将来自所述超小型接入点的消息 中的第一关键值用第二关键值替换, 并将经过处理后的消息发送到所述认证值 生成模块。
13、 根据权利要求 12所述的超小型网关, 其特征在于, 所述地址替换模 块包括:
第一地址替换模块, 用于将经过所述第一关键值替换模块处理后的数据, 根据所述第一映射模块建立的第二关键值和超小型网关的互联网协议地址与 第一关键值和超小型接入点的互联网协议地址的映射关系,将来自所述宏网络 侧的数据中的目的互联网协议地址用所述超小型接入点的互联网协议地址替 换,将来自所述超小型接入点的数据中的源互联网协议地址用所述超小型网关
的互联网协议地址替换, 并将经过处理后的数据发送到所述发送模块; 第二地址替换模块, 用于将经过所述认证值生成模块处理后的消息, 根据 所述第一映射模块建立的第二关键值和超小型网关的互联网协议地址与第一 关键值和超小型接入点的互联网协议地址的映射关系,将来自所述宏网络侧的 消息中的目的互联网协议地址用所述超小型接入点的互联网协议地址替换, 将 来自所述超小型接入点的消息中的源互联网协议地址用所述超小型网关的互 联网协议地址替换, 并将经过处理后的消息发送到所述发送模块。
14、 根据权利要求 10所述的超小型网关, 其特征在于, 还包括: 第二映射模块, 用于根据所述接收模块接收到的来自所述超小型接入点或 宏网络侧的消息中的接入终端单播标识, 建立所述接入终端单播标识与所述超 小型接入点的对应关系。
15、 根据权利要求 10所述的超小型网关, 其特征在于, 还包括: 索引配置模块, 用于存储超小型接入点所属的子网标识和索引配置, 并将 存储的超小型接入点所属的子网标识和索引配置发送给所述超小型接入点, 并 用于所述地址替换模块查询。
16、 一种超小型蜂窝网络与宏网络之间进行通信的方法, 其特征在于, 包 括:
超小型网关接收超小型接入点发送的用于请求鉴权的消息; 所述超小型 网关根据所述用于请求鉴权的消息中的用户名字段,将所述用于请求鉴权的消 息转发给接入网鉴权授权计费服务器。
17、 根据权利要求 16所述的超小型蜂窝网络与宏网络之间进行通信的方 法, 其特征在于, 还包括:
所述超小型网关接收所述接入网鉴权授权计费服务器发送的用于表明鉴 权通过的消息;
所述超小型网关根据所述用于表明鉴权通过的消息中的标识符字段, 将所 述用于表明鉴权通过的消息转发给所述超小型接入点。
18、 一种超小型网关, 其特征在于, 包括:
第二接收模块, 用于接收超小型接入点发送的用于请求鉴权的消息, 或接 收接入网鉴权授权计费服务器发送的用于表明鉴权通过的消息;
第二转发模块, 用于根据所述用于请求鉴权的消息中的用户名字段, 将接 收到的所述超小型接入点发送的用于请求鉴权的消息发送给所述接入网鉴权 授权计费服务器, 或根据所述用于表明鉴权通过的消息中的标识符字段, 将接 收到的所述接入网鉴权授权计费服务器发送的用于表明鉴权通过的消息发送 给所述超小型接入点。
19、 一种超小型蜂窝网络与宏网络之间进行通信的系统, 其特征在于, 包 括: 至少一个超小型接入点以及至少一个超小型网关,
所述超小型接入点用于向所述超小型网关发送消息 /数据,或接收所述超小 型网关发送的消息 /数据;
所述超小型网关用于接收来自宏网络侧或来自所述超小型接入点的消息 / 数据,将接收到的来自所述超小型接入点的消息 /数据中的源互联网协议地址替 换成所述超小型网关的互联网协议地址,或者将来所述自宏网络侧的消息 /数据 中的目的互联网协议地址替换成所述超小型接入点的互联网协议地址,将经过 地址替换后的消息 /数据发送到所述宏网络侧或所述超小型接入点。
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