CN101663875B - Communication network connecting device - Google Patents
Communication network connecting device Download PDFInfo
- Publication number
- CN101663875B CN101663875B CN200780052749.9A CN200780052749A CN101663875B CN 101663875 B CN101663875 B CN 101663875B CN 200780052749 A CN200780052749 A CN 200780052749A CN 101663875 B CN101663875 B CN 101663875B
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- Prior art keywords
- connected mode
- server
- connection
- time
- pppoe
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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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
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
Abstract
A wireless base station device (100) includes a control unit (103). The control unit (103) makes a connection request corresponding to a selected connection method among a plurality of connection methods for connecting with the Internet (600) for a server supporting the selected method, and also controls to make a connection request corresponding to another connection method if the server does not respond to the connection request. Such a constitution enables rapid and appropriate determination of the connection method and enables rapid connection with a communication network.
Description
Technical field
The present invention relates to the communication network connecting device being connected with communication network.
Background technology
In recent years, for the radio base station apparatus using in the mobile communication system such as portable phone is connected with epigyny device (host node), adopt more and more IP (Internet Protocol: Internet protocol) internet channel but not industrial siding approach.This is main in the reason aspect cost owing to cutting down the installation cost etc. of wiring maintenance management of industrial siding.The Connection Service of IP network is provided by ISP (internet services provider).The connected mode providing as ISP, has PPPoE (the Point-to-point protocol over Ethernet: Ethernet (registered trade mark) point-to-point protocol) mode and the DHCP being connected via broadband router (Dynamic Host Configuration Protocol: DHCP) mode that the network equipment is directly connected to IP network.
Leading technology as these connected modes of applying in a flexible way, there is the technology (for example, referring to Patent Document 1) of one by one selecting successively connected mode when interconnection network, connect and judge applicable connected mode from mutually different multiple connected mode.
Patent documentation 1: the open 2003-283589 (paragraph 0007) of Japan's patent
The simple and clear network equipment guide http://flets.com/opt/network/network_01.html of non-patent literature 1:NTT east Japan
Summary of the invention
Yet, in above-mentioned leading technology, owing to being that the benchmark of applicable connected mode may not be clear and definite for determining whether, thus can not be rapidly and determine exactly connected mode, thus be difficult to promptly be connected with communication network.
The object of the invention is to, provide a kind of energy by determining rapidly and exactly connected mode, the communication network connecting device being promptly connected with communication network.
The present invention is a kind of communication network connecting device being connected with communication network, it is characterized in that,
Comprise control part, this control part is selected a certain connected mode of the multiple connected mode for being connected with described communication network, the server corresponding with selected connected mode carried out to connection request, and carry out the connection request corresponding with other connected mode when described server does not return to response to described connection request.
In addition, the present invention is a kind of communication network connecting device being connected with communication network, it is characterized in that,
Comprise control part, this control part carries out connection request concurrently to corresponding with multiple connected mode for being connected with described communication network respectively server, and the response of connected mode described connection request is not returned to to(for) described server stops connecting and processes.
According to the present invention, can be rapidly and determine exactly connected mode, thus can promptly be connected with communication network.
Accompanying drawing explanation
Fig. 1 is the figure that the network configuration of embodiment of the present invention 1 is shown.
Fig. 2 is the flow chart that the handling process of radio base station apparatus is shown.
Fig. 3 is the figure that network configuration example 1 is shown.
Fig. 4 is the figure that network configuration example 2 is shown.
Fig. 5 is the figure of structure that the radio base station apparatus of embodiment of the present invention 2 is shown.
Fig. 6 is the flow chart of the handling process of control part when circuit recovery is shown.
Fig. 7 is the figure of structure that the radio base station apparatus of embodiment of the present invention 4 is shown.
Embodiment
Execution mode 1
Fig. 1 is the figure that the network configuration of embodiment of the present invention 1 is shown.The following structure of network using: radio base station apparatus 100 is selected successively via the path of BBR (broadband router) 200 and ISP400 or via the path of the PPPoE server 300 of ISP 400, be connected with the Internet 600, via router 700 and the epigyny device 500 of relative configuration, communicate.
Radio base station apparatus 100 be and mobile communication terminal between carry out the device of radio communication, have: to wireless signal receive transmission processing reception sending part 101, as the interface of network side, carry out wire signal and receive and send the network interface portion 102 of relevant treatment and control the control part 103 that wireless reception sends and wired reception sends.Control part 103 has the data store 104 of storage wired connection desired parameters.Retry interval time while having transmission interval time, number of times and overtime time limit, the Dynamic Host Configuration Protocol server of authentication mode that PPPoE connects, ID (identifier), password, keep-alive not connect in desired parameters, number of times and overtime time limit etc.
Epigyny device 500 is for example can carry out the control of radio base station apparatus 100 or carry out the host node of the radio base station apparatus 100 of packet switching.
Fig. 2 is the flow chart that the handling process of radio base station apparatus is shown.First, in step a1, radio base station apparatus 100 starts by connecting or restarting power supply.Once start, in next step a2, carry out the PPPoE of PPPoE server to connect and process, to carry out for example, connection based on the 1st connected mode (PPPoE connected mode).Particularly, PPPoE server is sent and comprises the connection request that request is provided in IP address, and wait for the response from PPPoE server.Then,, in step a3, judgement has the response not having from PPPoE server.If there is response, proceed to next step a4, still carry out the IP address acquisition based on PPPoE connection, connect IP network, the state that formation can be communicated by letter with epigyny device 500.
If PPPoE server is response not, or overtime after retry in the situation that, in step a5, carry out the DHCP of Dynamic Host Configuration Protocol server to connect and process, for example, to carry out the 2nd connected mode (DHCP connects).Particularly, Dynamic Host Configuration Protocol server is sent and comprises the connection request that request is provided in IP address, and wait for the response from Dynamic Host Configuration Protocol server.Then,, in step a6, judgement has the response not having from Dynamic Host Configuration Protocol server.If there is response, proceed to next step a7, still carry out the IP address acquisition based on DHCP connection, connect IP network, the state that formation can be communicated by letter with epigyny device 500.
In the situation that not from the response of Dynamic Host Configuration Protocol server or overtime after retry in the situation that, think that PPPoE connected mode all can not be connected with DHCP connected mode, returns to the processing of step a2.Repeatedly perform step the processing of a2, a3, a5, a6, until can be connected with any in DHCP connected mode with PPPoE connected mode.
By utilizing such step, carry out the connection to IP network, even be PPPoE or DHCP in the situation that unclear while starting radio base station apparatus to the connected mode of IP network, also can automatically at radio base station apparatus, set IP address the connection of execution to IP network.
Moreover, when Dynamic Host Configuration Protocol server does not respond, also can carry out based on be followed successively by the 3rd connected mode, the 4th connected mode ... the connection of IP network of different connected modes.
First implement the reasons are as follows of PPPoE.Dynamic Host Configuration Protocol server is usually the broadband router in user's residence, in the case the next localized network that is formed in user's residence inner sealing of broadband router.Here, if implement PPPoE when in DHCP connection status, connect, only to being that broadband router in user's residence of Dynamic Host Configuration Protocol server is propagated PPPoE connection message.Broadband router abandons this PPPoE connection message as not clear message.Therefore, do not send to upper network.Like this, at user's residence inner sealing,, do not affect ISP (ISP).Therefore, first to implement PPPoE, be connected to good.
Above-mentioned is first to implement PPPoE to connect preferably example, and it is better in ensuing situation, first to carry out DHCP connection.Such as waiting in the residence of condo a plurality of radio base station apparatus 100 is set in the situation that, as shown in Figure 3, by in the next direct-connected structure of a plurality of radio base station apparatus 100 and PPPoE server 300, spend corresponding to the connection expense that is connected radical with PPPoE server 300, cost rises.For this point, as shown in Figure 4, by insert broadband router 200 between PPPoE server 300 and the next a plurality of radio base station apparatus 100, the next regional area that becomes of broadband router 200, does not spend the connection expense to ISP (ISP).Only spend the expense that is connected between broadband router 200 and PPPoE server 300, favourable aspect cost.In the situation that in such type of attachment, by first carrying out DHCP connection, can shorten Wireline and connect the time of processing.
Execution mode 2
Fig. 5 is the figure of structure that the radio base station apparatus of embodiment of the present invention 2 is shown.Present embodiment 2 is added wiring line state test section 105 and resume storage part 106 in the radio base station apparatus of execution mode 1.
Identical with execution mode 1, data store 104 is also included in the storage device in control part 103, and storage starts the required system parameters of radio base station apparatus 100.Resume storage part 106 is included in the storage device in control part 103 equally, nonvolatile memory, consists of, and storage for example, connects IP network success or failed resume by which mode of multiple connected mode (PPPoE or DHCP).When radio base station apparatus 100 starts, the system parameters of storage in calling data storage part 104, for example, attempts connecting IP network by the specified Starting mode of this system parameters (PPPoE or DHCP).The connected mode of successful connection (for example PPPoE or DHCP) be successively recorded to resume storage part 106 thereafter.If there is the actual achievement being connected with IP network, even once, be also recorded to this resume storage part 106, to connecting resume, accumulate like this.
Line status test section 105 is included in network interface portion 102, monitors at ordinary times the state of the circuit of foundation via IP network.The state of circuit refers to that the circuit that circuit has cut off or cut off obtains the state restoring.If line status test section 105 detects line status (cut off or restore), the state that immediately control part 103 announcement trunks is cut off or restored.When detecting circuit and cut off, make to be arranged at the LED (Light Emitting Diode: light-emitting diode, not shown) of radio base station apparatus 100 to light corresponding to the form of circuit dissengaged positions, thereby operator is carried out to alarm.When detecting circuit and restore, to represent that circuit is restored and the form that forms use state is lighted LED.
At this moment, according to the resume of the connected mode of storage in resume storage part 106, the connected mode (for example PPPoE or DHCP) of cutting off eve with circuit connects and reconnects the Internet.
Fig. 6 is the flow chart of control part handling process when circuit recovery is shown.Under the state cutting off at Wireline, first, in step b1, line status test section 105 detection lines of network interface portion 102 restore.Then,, in step b2, if receive the notice that circuit restores,, by with reference to resume storage part 106, confirm that the connected mode of circuit cut-out eve is which kind of (being for example PPPoE or DHCP) in multiple connected mode.Then,, in step b3, which kind of connected mode is the connected mode that judgement circuit cuts off eve be.
If the connected mode of circuit cut-out eve is PPPoE in step b3, proceed to next step b4.In step b4, while judging whether to restore because of circuit, the keep-alive timer PPPoE server that expires is not implemented cut off to process.Here, if keep-alive timer expires, after surpassing, in next step b5, be judged as by PPPoE server and cut off and being connected of IP network, and carry out reconnecting based on PPPoE.
In step b4, if the keep-alive timer of PPPoE is not yet due, proceed to step b6.In step b6, the echo request (EchoRequest) of using with keep-alive sends interval independently to the request of PPPoE server transmission echo.This is that while independently confirming that for the interval with keep-alive circuit restores, pppoe session is effective.In next step, judgement has does not reply (EchoReply) from the echo of PPPoE server.If have from the echo of PPPoE, reply, proceed to next step b8.In step b8, pppoe session also, in process of establishing, continues PPPoE and connects.
If replied from the echo of PPPoE server in step b7, be judged as and there is no PPPoE server, connected mode changes DHCP into, and the DHCP that starts anew in step b9 connects processing.
Thus, can not wait for the keepalive period of PPPoE, circuit changes the processing of connected mode immediately after restoring.
It is also identical when in addition, the connected mode of circuit cut-out eve is DHCP.
When the connected mode of circuit cut-out eve is DHCP in step b3, proceed to step b10.In step b10, judge whether DHCP lease timer expires.According to DHCP lease timer, whether expire, can judge whether Dynamic Host Configuration Protocol server is opened DHCP and connected.Here, if DHCP lease timer expires and surpasses, be judged as Dynamic Host Configuration Protocol server and discharged DHCP connection, thereby carry out reconnecting based on DHCP.
If DHCP lease timer is not yet due in step b10,, in next step b11, independently Dynamic Host Configuration Protocol server is sent to DHCP request with the transmission interval of DHCP request.This is that whether the IP address based on DHCP is still effective when independently confirming that with the transmission interval of DHCP request circuit restores.Then in step b12, judge whether that from Dynamic Host Configuration Protocol server, returning to DHCP confirms (DHCP ACK).If return to DHCP from Dynamic Host Configuration Protocol server, confirm, IP address is still effective, continues DHCP and connect in next step b13.
If return to DHCP from Dynamic Host Configuration Protocol server in step b12, confirm, be judged as connected mode and change PPPoE into, and proceed to step b5, the PPPoE that starts anew connects processing.
Thus, can not wait for the cycle of renting prolongation of DHCP, circuit can change the processing of connected mode after restoring immediately.
Equally, the recovery after dump or while restarting restarting of causing, after also resume storage part 106 being confirmed, first reconnects with identical connected mode.
Utilize above execution mode, obtain shortening recovery or the recovery after dump after Wireline cuts off, the effect in the connection processing time while restarting reconnecting of causing.
Execution mode 3
When the control part 103 of radio base station apparatus 100 does not have from the response of server after sending connection request, after certain certain hour, stop connecting and process, overtime.In above-mentioned execution mode 1 or 2, by the system parameters of storage in the data store 104 of control part 103, specify overtime time limit.In present embodiment 3, the turnaround time that connected mode that the past was connected is relevant is pre-stored in the time of control part 103 storage part (not shown), and sets overtime time limit according to this turnaround time.Time storage part is identical with resume storage part 106, nonvolatile memory, consists of, and also can share with resume storage part 106.Turnaround time is from sending connection request, extremely receiving the time from the response of server corresponding to this connection request.
The action of present embodiment 3 is then described.Radio base station apparatus 100 is for example pressed after PPPoE or DHCP startup, and the turnaround time during by connection number of times and startup is stored into respectively in resume storage part 106 and time storage part.Turnaround time when connecting number of times (connection resume) and being connected can be calculated the mean value of turnaround time, and this value is also pre-stored in time storage part.
While restoring from Wireline dissengaged positions, utilize resume storage part 106 to confirm that circuit cuts off the connected mode of eve, and reconnecting processing, the time wherein turnaround time based on storing in time storage part being set is set as overtime time limit.For example,, using 2 times of times to the turnaround time as overtime time limit.Or, in the situation that storing a plurality of turnaround time for a kind of connected mode, using 2 times of times to its mean value as overtime time limit.If passed through this time also not from the response of server, just connected processing with other connected mode.
This recovery after dump or restart after reconnect action time also identical.
Utilize above execution mode, can the mode of being connected change recovery or the recovery after dump after Wireline cuts off, the connection processing time while restarting reconnecting of causing, can connect rapidly.
Execution mode 4
Fig. 7 is the figure of structure that the radio base station apparatus of embodiment of the present invention 4 is shown.In execution mode 1,2 or 3, when radio base station apparatus 100 starts or while reconnecting, when being connected with IP network, attempt successively multiple connected mode (for example, from PPPoE connection or DHCP connection), but in present embodiment 4, for multiple connected mode, (for example PPPoE is connected and is connected both with DHCP) simultaneously and attempt concurrently connecting.What for this reason, control part 103 comprised that the connection carried out based on PPPoE connected mode processes the 1st connects handling part 107 and carries out the 2nd of connection processing based on DHCP connected mode and be connected handling part 108.
The action of present embodiment 4 then, is described.Radio base station apparatus 100 (comprises recovery or the recovery after dump after Wireline cuts off, restarts restarting of causing) when starting, and at PPPoE and DHCP two states, all attempts concurrently and being connected of IP network.At this moment, according to the indication of the system parameters of storage in data store 104, connect processing.For example, when have from the server of PPPoE or DHCP one party response time, use the connected mode corresponding with this server to start and use.In addition, in the moment having had from the response of a server, stop the connection that the connected mode corresponding to another server is relevant and process.For example, when had from PPPoE server response time, the 1st connects 107 pairs the 2nd of handling parts connects handling part 108 announcement servers and has response, the 2nd connection that connects handling part 108 is processed and stopped.
Connected mode is that 3 above situations are also identical, has had the moment of response at the server of first kind of connected mode, and the connection processing of remaining connected mode is stopped.
Owing to carrying out concurrently as described above the processing that connected mode is different, so if a kind of connected mode is connected, needn't wait for to overtime for other connected mode.Thereby, obtain shortening significantly the effect of the time before connecting.
Claims (4)
1. a communication network connecting device, is connected with communication network, it is characterized in that,
Comprise:
Control part, this control part is selected a certain connected mode of multiple connected mode for being connected with described communication network, the server corresponding with selected connected mode carried out to connection request, and pair server corresponding with other connected mode carries out connection request when described server does not return to response to described connection request;
Resume storage part, this resume storage part is pre-stored about described multiple connected mode successful connection or failed resume; And
Line status test section, this line status test section detects cut-out and the recovery of communication line,
When detecting communication line having restored in described line status test section, described control part is controlled according to the resume of storing in described resume storage part, and judgement communication line cuts off the connected mode of eve successful connection,
If the connected mode of PPPoE; judge when circuit restores and whether the keep-alive timer of the corresponding server of this connected mode expires; in the overdue situation of described keep-alive timer, be judged as YES because the corresponding server of this connected mode cuts off, based on this connected mode, re-start connection; in the undue situation of described keep-alive timer; send echo request, whether still effective to confirm the session of described server, if invalid; become the connected mode of DHCP
On the other hand, if the connected mode of described DHCP, judge when circuit restores and the renting timer and whether expire of the corresponding server of this connected mode, described, rent in the overdue situation of timer, be judged as YES and cut off because of the corresponding server of this connected mode, based on this connected mode, re-start connection, described, rent in the undue situation of timer, send DHCP request, whether still effective to confirm the IP address of described server, if invalid, become the connected mode of described PPPoE.
2. communication network connecting device as claimed in claim 1, is characterized in that, be and mobile communication terminal between carry out the radio base station apparatus of radio communication.
3. communication network connecting device claimed in claim 1, is characterized in that,
Comprise time storage part, this pre-stored turnaround time of time storage part, this turnaround time refers to from sending described connection request to receiving the time from the response of server corresponding to described connection request,
Described control part, when not returning to yet response over the time of setting according to the turnaround time of storing in described time storage part, is judged as without the response to described connection request.
4. communication network connecting device claimed in claim 3, is characterized in that, in the situation that described time storage part is stored a plurality of turnaround time for same connected mode, described control part is used the time of setting according to the mean value of a plurality of turnaround time.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2007/062851 WO2009001444A1 (en) | 2007-06-27 | 2007-06-27 | Communication network connecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101663875A CN101663875A (en) | 2010-03-03 |
| CN101663875B true CN101663875B (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780052749.9A Expired - Fee Related CN101663875B (en) | 2007-06-27 | 2007-06-27 | Communication network connecting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5079000B2 (en) |
| CN (1) | CN101663875B (en) |
| WO (1) | WO2009001444A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856571B (en) * | 2012-11-30 | 2017-10-13 | 锐迪科（重庆）微电子科技有限公司 | A kind of adaptive networking connection method and system |
| CN103973468B (en) * | 2013-01-29 | 2018-01-09 | 华为终端有限公司 | The automatic processing method and processing equipment that online pattern is set |
| JP6101124B2 (en) * | 2013-03-18 | 2017-03-22 | キヤノン株式会社 | COMMUNICATION DEVICE, ITS CONTROL METHOD, PROGRAM |
| CN103607290B (en) | 2013-10-25 | 2016-09-21 | 小米科技有限责任公司 | A kind of method and apparatus that network connection parameter is set |
| CN105120009A (en) * | 2015-09-14 | 2015-12-02 | 百度在线网络技术（北京）有限公司 | Terminal interconnection method and device |
| JP7008514B2 (en) * | 2018-01-22 | 2022-01-25 | キヤノン株式会社 | Communication equipment, control methods, and programs |
| JP2022012202A (en) * | 2020-07-01 | 2022-01-17 | Ｎｅｃプラットフォームズ株式会社 | First communication apparatus, second communication apparatus, system, method and program |
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| JPH0475198A (en) * | 1990-07-17 | 1992-03-10 | Casio Comput Co Ltd | Data communication system |
| JPH09172400A (en) * | 1995-12-19 | 1997-06-30 | Nec Eng Ltd | Satellite line backup system |
| JP3690639B2 (en) * | 1998-05-27 | 2005-08-31 | オムロン株式会社 | Programmable logic controller, communication condition setting method thereof, and communication condition setting system |
| JP2000035930A (en) * | 1998-07-17 | 2000-02-02 | Ricoh Co Ltd | Network system |
| JP3899968B2 (en) * | 2002-03-18 | 2007-03-28 | 松下電器産業株式会社 | Communication terminal and communication system |
| JP2003283589A (en) * | 2002-03-27 | 2003-10-03 | Nippon Telegr & Teleph Corp <Ntt> | Network connecting apparatus, network connection method, and program |
| JP3880432B2 (en) * | 2002-04-11 | 2007-02-14 | キヤノン株式会社 | Wireless communication control method, program for executing wireless communication control method, and storage medium |
| JP2005012613A (en) * | 2003-06-20 | 2005-01-13 | Hitachi Communication Technologies Ltd | Gateway device and call-connection control method |
| JP2006352613A (en) * | 2005-06-17 | 2006-12-28 | Nippon Telegr & Teleph Corp <Ntt> | Voice communication method |
| JP2008042834A (en) * | 2006-08-10 | 2008-02-21 | Nec Access Technica Ltd | Network connecting apparatus, network system and network connection method |
-
2007
- 2007-06-27 CN CN200780052749.9A patent/CN101663875B/en not_active Expired - Fee Related
- 2007-06-27 JP JP2009520245A patent/JP5079000B2/en not_active Expired - Fee Related
- 2007-06-27 WO PCT/JP2007/062851 patent/WO2009001444A1/en active Application Filing
Non-Patent Citations (4)
| Title |
|---|
| JP特开2000-49891A 2000.02.18 |
| JP特开2003-273953A 2003.09.26 |
| JP特开2005-12613A 2005.01.13 |
| JP特开2006-352613A 2006.12.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101663875A (en) | 2010-03-03 |
| JPWO2009001444A1 (en) | 2010-08-26 |
| JP5079000B2 (en) | 2012-11-21 |
| WO2009001444A1 (en) | 2008-12-31 |
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