CN104244210A - Emergency communication method, mobile terminal, authentication server and wireless access point - Google Patents
Emergency communication method, mobile terminal, authentication server and wireless access point Download PDFInfo
- Publication number
- CN104244210A CN104244210A CN201310246982.8A CN201310246982A CN104244210A CN 104244210 A CN104244210 A CN 104244210A CN 201310246982 A CN201310246982 A CN 201310246982A CN 104244210 A CN104244210 A CN 104244210A
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- Prior art keywords
- urgency communication
- user
- message
- access point
- wireless access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
- H04W12/069—Authentication using certificates or pre-shared keys
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/50—Connection management for emergency connections
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Public Health (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an emergency communication method. The method includes the steps that a user terminal UE sends an emergency communication request to a wireless access point AP; after the AP receives the emergency communication request sent by the UE, and a response message for requesting user name information is sent to the UE; after the UE receives the response message sent by the AP, an emergency communication message including the user name information is sent to an authentication server AS through the AP; the AS receives the emergency communication message and judges whether the received emergency communication message is an emergency communication frame, if yes, the user name is set to be an emergency communication user and the AP is informed of opening an access port for the user. The invention further discloses a mobile terminal, the authentication server and the wireless access point. By means of the emergency communication method, the mobile terminal, the authentication server and the wireless access point, the defects are compensated effectively, an emergency channel is formed in an existing WIFI network, and users can obtain the required information conveniently any place and any time according to requirements.
Description
Technical field
The present invention relates to emergency communication technology, particularly, relate to a kind of emergency communication method, mobile terminal, certificate server and WAP (wireless access point).
Background technology
Day by day universal along with WiFi network, WiFi has become the synonym of WLAN (WLAN), it provide a kind of technical approach allowing people's wireless high-speed access network whenever and wherever possible, by means of convenient, flexible networking mode, than cellular network transmission rate and be worldwide free frequency range without the need to any telecom operation license faster, WiFi applies more and more extensive in various terminal, become and comprise mobile phone, panel computer is in the basic function of interior mobile terminal, user can realize browsing page in WiFi overlay area, the business such as to answer and call.
Generally, access WiFi network needs the authentication by Wi-Fi hotspot, ensures fail safe and the legitimacy of Web vector graphic; In case of emergency, when especially accident occurs in disaster/medical treatment/scene of the accident etc., in the urgent need to providing a kind of based on the emergency communication of WiFi WLAN and the measure of Emergency Assistance.
Existing patent documentation comprises: the number of patent application Chinese patent application " safety access method based on expansion 802.1x Verification System " that to be the Chinese patent application " a kind of 802.1x authentication method " of CN200310112944.X and patent No. CN200810147953.5 be.
CN200310112944.X Chinese patent application has the following disadvantages: this patent object is the certification demand for meeting multiple user under same port, meet the diversity requirement of enterprise and group user, cannot realize towards the public in case of emergency quickly through WLAN (wireless local area network) certification and use Internet resources safely.
CN200810147953.5 Chinese patent application has the following disadvantages: this patent is by expansion EAPOL agreement, increase secure accessing mark, realize authentication requester and terminal use by two layers of access device secure and trusted access network, its object is to the security consideration promoting access user, namely when not changing conventional access authorization mode, ensure that the genuine and believable of the edge device of access network, cannot realize equally towards the public in case of emergency quickly through WLAN (wireless local area network) certification and use Internet resources safely.
Summary of the invention
In order to solve the problems of the technologies described above, the invention discloses a kind of emergency communication method, mobile terminal, certificate server and WAP (wireless access point), can realize in case of emergency quickly through WLAN (wireless local area network) certification and use Internet resources safely.
Emergency communication method disclosed by the invention, comprising:
User terminal UE sends urgency communication request to wireless access point AP;
After described AP receives the urgency communication request of described UE transmission, send the response message of a request username information to described UE;
After described UE receives the response message of described AP transmission, sent the urgency communication message comprising described username information to certificate server AS by described AP;
Described AS receives described urgency communication message, and judges whether the urgency communication message received is urgency communication frame, if so, then described user name is set to urgency communication user, and notifies that described AP is this user's open visit port.
Preferably,
Described AS notifies that described AP is for after this user's open visit port, comprising:
Described AP limits the destination address of described urgency communication user connection within the scope of the IP address of presetting or network address.
Preferably, described AS receives described urgency communication message, and judges whether the urgency communication message received is urgency communication frame, if not, then initiates authentication to described UE.
Mobile terminal disclosed by the invention, comprising:
Urgency communication request module, for sending urgency communication request to wireless access point AP;
Urgency communication message sending module, for after the response message receiving the request username information that wireless access point AP sends, sends the urgency communication message comprising described username information to certificate server AS by described AP.
WAP (wireless access point) disclosed by the invention, comprising:
Urgency communication request receiving module, for receive user terminal UE send urgency communication request after, to described UE send one request username information response message;
Urgency communication packet forwarding module, for receiving the urgency communication message comprising username information that described UE sends, and is transmitted to certificate server AS;
The open module of access port, during for judging that the urgency communication message that described UE sends is urgency communication frame at described AS, is designated as this user's open visit port according to described AS.
Preferably,
Described WAP (wireless access point) also comprises:
Restrict access module, for after for this user's open visit port, limits destination address that described urgency communication user connects within the scope of the IP address of presetting or network address.
Certificate server disclosed by the invention, comprising:
Urgency communication message receiver module, for receiving the urgency communication message comprising username information that UE sends;
Urgency communication frame judge module, for judging whether the urgency communication message received is urgency communication frame, if so, then described user name is set to urgency communication user, and notifies that described AP is this user's open visit port.
Preferably,
Described certificate server also comprises:
Authentication module, for initiating authentication to user terminal UE;
Described urgency communication frame judge module also for: judge receive urgency communication message be not urgency communication frame time, notify described authentication module to user terminal UE initiate authentication.
Beneficial effect of the present invention is:
One of advantage of the present invention is realizability.WLAN (wireless local area network) is mainly towards individual, family and enterprise's application at the beginning of design, and the consideration in public service and emergency communication is short of to some extent.The present invention compensate for above-mentioned defect effectively, opens an emergency access from existing WiFi network, facilitates the Information succour of user in need at any time required for the acquisition of any place.
Two of advantage of the present invention is fail safe.The present invention protect the possessory individual privacy of wireless network focus to greatest extent and proprietorial while, for Stochastic accessing, user provides emergency access, also by limited target access address prevent malice and abuse of emergency channel resource.
Three of advantage of the present invention is compatibility.Existing technical standard that the present invention is compatible to greatest extent and air interface and frame format requirement, do not change existing WLAN access authentication mode, only need to carry out software upgrading to existing equipment and just can realize emergency communication function.
Accompanying drawing explanation
Fig. 1 is the client/server architecture of the emergency communication method employing IEEE802.1x suggestion based on WiFi WLAN;
Fig. 2 is the EAP protocol massages packet structure transmitted between client STA and wireless access point AP;
Fig. 3 is according to the emergency communication method flow chart based on WiFi WLAN in the embodiment of the present invention;
Fig. 4 is the structured flowchart according to mobile terminal in the embodiment of the present invention;
Fig. 5 is the structured flowchart according to WAP (wireless access point) in the embodiment of the present invention;
Fig. 6 is the structured flowchart according to certificate server in the embodiment of the present invention.
Embodiment
A kind of emergency communication access authentication method based on WiFi WLAN that the present invention proposes, the access control mechanisms that the method defines based on IEEE 802.1x, by expansion EAPOL and EAP standard agreement message identifying, increase " urgency communication " initiation message and frame type, achieve in case of emergency fast and safely accessing WLAN network and carry out Emergency Assistance and communicate in time.
Below in conjunction with accompanying drawing, the emergency communication method that the present invention is based on WiFi WLAN is described.
As shown in Figure 1, the emergency communication method based on WiFi WLAN that the present invention proposes adopts the client/server architecture of IEEE 802.1x suggestion, and it comprises three entities, i.e. client STA, wireless access point AP and certificate server AS, respective effect is as follows:
● client STA, as the applicant of authentication request, is the terminal of request access Internet resources, initiates authentication request thus.
● wireless access point AP, also referred to as authenticator, plays the function of " transparent transmission " in verification process.
● certificate server AS, is for authenticator provides the entity of authentication service, usually realizes authentication and authorization function by radius server.
IEEE 802.1x Verification System adopts EAP agreement (Extensive Authentication Protocol, Extensible Authentication Protocol), exchanges urgency communication message between client STA and certificate server AS.Wherein, between client STA and wireless access point AP, EAP protocol massages uses EAPOL(EAPOver LAN) encapsulation format, directly carrying is in the wlan environment.Between wireless access point AP and certificate server AS, EAP protocol massages uses EAPOR(EAP Over RADIUS) encapsulation format, be carried on RADIUS(Remote Authentication Dial In User Service, remote customer dialing authentication system) in agreement.
The working mechanism of IEEE 802.1x is: client STA initiates authentication request, by wireless access point AP, the usemame/password of correspondence or digital certificate are passed to certificate server AS authentication, when user is by after certification, certificate server AS can pass to wireless access point AP authentication result and relevant information, and wireless access point AP can determine the mandate/unauthorized state of controlled ports according to the instruction of certificate server AS (accepting or refusal).
The present invention follows the client/server architecture that IEEE 802.1x advises, the access authentication flow process that compatible former agreement specifies.On original protocol basis, add new message definition for the field in EAP message and EAPOL message, guarantee to realize urgency communication certification access process of the present invention.The Field Definition increased comprises:
1) the type field in EAPOL message adds EmergencyStart message, and after guaranteeing that client STA initiates emergency communication certification, system side promotes its priority, for it arranges special escape truck.
2) the Code field in EAP message increases a kind of new EAP Packet type---urgency communication Emergency, for client STA in verification process, transmits urgency communication urgency communication message between wireless access point AP and certificate server AS three.
As shown in Figure 2, the EAP protocol massages packet transmitted between client STA and wireless access point AP is the EAPOL agreement based on 802.1x definition, the EAP protocol data bag at EAPOL agreement enclosed inside, and each Field Definition of EAPOL message format is as follows:
● PAE Ethernet Type: the protocol type representing port access entity PAE, the protocol type that 802.1x distributes is 0x888E.
● Protocol Version: represent the protocol version that the transmit leg of EAPOL frame is supported.
● Type: frame type
■ EAP-Packet(value is 00), urgency communication message frame, for carrying urgency communication message;
■ EAPOL-Start(value is 01), frame is initiated in certification;
■ EAPOL-Logoff(value is 02), exit claim frame;
■ EAPOL-Key(value is 03), key information frame;
■ EAPOL-EmergencyStart(value is FF), initiate frame for emergency communication certification, the frame type that special definition of the present invention is new.
● Length: represent data length, the length of " Packet Body " field namely, if be 0, represents the data field do not had below.
● Packet Body: packet entity.Different frame types correspond to different data formats, when frame type is EAP-Packet(00) time, this field enclosed inside packet of standard EAP form, each Field Definition of EAP is as follows:
■ Code: the type indicating EAP bag, original justice one has four kinds: request Request, response Response, successful Success, failed Failure.In order to ensure the realization of emergency communication, increase a kind of new EAP Packet type definition---urgency communication Emergency, in client STA, transmit urgency communication urgency communication message between wireless access point AP and certificate server AS three.
■ Identifier: the auxiliary identifier carrying out requests/response messages.
The length that ■ Length:EAP wraps, comprises the full content length of Code, Identifier, Length and Data.
■ Data:EAP data message, content format is determined by Code.
Embodiment one
As shown in Figure 3, present embodiment discloses a kind of emergency communication method based on WiFi WLAN, detailed authentication method flow process is as follows:
Step 1: client STA sends urgency communication request to wireless access point AP and initiates message (EAPOL-EmergencyStart), starts urgent verification process;
Step 2: wireless access point AP sends the response message (EAPOL_EAP_Request) of a request username information to client STA;
Step 3: client STA responds a urgency communication response message comprising the information such as own user name, and ((EAPOL_EAP_Emergency) is to wireless access point AP;
This Frame (RADIUS_EAP_Emergency) after the process of radius protocol package is given certificate server AS process by step 4:AP;
Step 5: certificate server AS judges the EAP frame type received, if be urgency communication frame, then this user name is set to urgency communication user, and notify that wireless access point AP opens control port, wireless access point AP sends authentication success message (EAPOL_EAP_Success) to client STA, and certification terminates; Otherwise carry out authenticating user identification according to 802.1x normal process.
Step 6: after authentication success, certificate server AS sends session key to wireless access point AP, starts session according to this key client STA.
Step 7: session start, client STA initiation session connection application, wireless access point AP for the client being masked as " urgency communication user ", limit its connect destination address preset IP address or network address scope in.
Embodiment two
As shown in Figure 4, present embodiment discloses a kind of mobile terminal, comprising:
Urgency communication request module, for sending urgency communication request to wireless access point AP;
Urgency communication message sending module, for after the response message receiving the request username information that wireless access point AP sends, sends the urgency communication message comprising username information to certificate server AS by AP.
Embodiment three
As shown in Figure 5, present embodiment discloses a kind of WAP (wireless access point), comprising:
Urgency communication request receiving module, for receive user terminal UE send urgency communication request after, to described UE send one request username information response message;
Urgency communication packet forwarding module, for receiving the urgency communication message comprising username information that described UE sends, and is transmitted to certificate server AS;
The open module of access port, during for judging that the urgency communication message that described UE sends is urgency communication frame at described AS, is designated as this user's open visit port according to described AS.
Restrict access module, for after for this user's open visit port, limits destination address that described urgency communication user connects within the scope of the IP address of presetting or network address.
Embodiment four
As shown in Figure 6, present embodiment discloses a kind of certificate server, comprising:
Urgency communication message receiver module, for receiving the urgency communication message comprising username information that UE sends;
Urgency communication frame judge module, for judging whether the urgency communication message received is urgency communication frame, if, then described user name is set to urgency communication user, and notify that described AP is this user's open visit port, if not, then notify that authentication module initiates authentication to user terminal UE;
Authentication module, for initiating authentication to user terminal UE.
It should be noted that; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. an emergency communication method, comprising:
User terminal UE sends urgency communication request to wireless access point AP;
After described AP receives the urgency communication request of described UE transmission, send the response message of a request username information to described UE;
After described UE receives the response message of described AP transmission, sent the urgency communication message comprising described username information to certificate server AS by described AP;
Described AS receives described urgency communication message, and judges whether the urgency communication message received is urgency communication frame, if so, then described user name is set to urgency communication user, and notifies that described AP is this user's open visit port.
2. the method for claim 1, is characterized in that:
Described AS notifies that described AP is for after this user's open visit port, comprising:
Described AP limits the destination address of described urgency communication user connection within the scope of the IP address of presetting or network address.
3. the method for claim 1, is characterized in that:
Described AS receives described urgency communication message, and judges whether the urgency communication message received is urgency communication frame, if not, then initiates authentication to described UE.
4. a mobile terminal, is characterized in that, comprising:
Urgency communication request module, for sending urgency communication request to wireless access point AP;
Urgency communication message sending module, for after the response message receiving the request username information that wireless access point AP sends, sends the urgency communication message comprising described username information to certificate server AS by described AP.
5. a WAP (wireless access point), is characterized in that, comprising:
Urgency communication request receiving module, for receive user terminal UE send urgency communication request after, to described UE send one request username information response message;
Urgency communication packet forwarding module, for receiving the urgency communication message comprising username information that described UE sends, and is transmitted to certificate server AS;
The open module of access port, during for judging that the urgency communication message that described UE sends is urgency communication frame at described AS, is designated as this user's open visit port according to described AS.
6. WAP (wireless access point) as claimed in claim 5, is characterized in that:
Described WAP (wireless access point) also comprises:
Restrict access module, for after for this user's open visit port, limits destination address that described urgency communication user connects within the scope of the IP address of presetting or network address.
7. a certificate server, is characterized in that, comprising:
Urgency communication message receiver module, for receiving the urgency communication message comprising username information that UE sends;
Urgency communication frame judge module, for judging whether the urgency communication message received is urgency communication frame, if so, then described user name is set to urgency communication user, and notifies that described AP is this user's open visit port.
8. certificate server as claimed in claim 7, is characterized in that:
Described certificate server also comprises:
Authentication module, for initiating authentication to user terminal UE;
Described urgency communication frame judge module also for: judge receive urgency communication message be not urgency communication frame time, notify described authentication module to user terminal UE initiate authentication.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246982.8A CN104244210A (en) | 2013-06-20 | 2013-06-20 | Emergency communication method, mobile terminal, authentication server and wireless access point |
| PCT/CN2013/082324 WO2014201766A1 (en) | 2013-06-20 | 2013-08-27 | Emergency communication method, mobile terminal, authentication server and wireless access point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246982.8A CN104244210A (en) | 2013-06-20 | 2013-06-20 | Emergency communication method, mobile terminal, authentication server and wireless access point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104244210A true CN104244210A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310246982.8A Withdrawn CN104244210A (en) | 2013-06-20 | 2013-06-20 | Emergency communication method, mobile terminal, authentication server and wireless access point |
Country Status (2)
| Country | Link |
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| CN (1) | CN104244210A (en) |
| WO (1) | WO2014201766A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263099A (en) * | 2015-08-28 | 2016-01-20 | 小米科技有限责任公司 | Method and device for sending position information |
| CN106550319A (en) * | 2015-12-11 | 2017-03-29 | 南方科技大学 | Wi-Fi authentication method and system |
| WO2017097211A1 (en) * | 2015-12-09 | 2017-06-15 | Huawei Technologies Co., Ltd. | System and methods for critical communication |
| CN108809903A (en) * | 2017-05-02 | 2018-11-13 | 中国移动通信有限公司研究院 | A kind of authentication method, apparatus and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801231A (en) * | 2005-01-07 | 2006-07-12 | 冲电气工业株式会社 | Emergency call system and emergency call method |
| CN101527897A (en) * | 2009-03-25 | 2009-09-09 | 曾杰 | Emergency communication method of wireless cell phone and wireless local area network and communication device |
| US20110201300A1 (en) * | 2010-02-18 | 2011-08-18 | Samuel Ornstein | Emergency contact information device and method |
| CN102244851A (en) * | 2011-06-27 | 2011-11-16 | 南京邮电大学 | Emergency radio communication method based on public telephone network |
-
2013
- 2013-06-20 CN CN201310246982.8A patent/CN104244210A/en not_active Withdrawn
- 2013-08-27 WO PCT/CN2013/082324 patent/WO2014201766A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801231A (en) * | 2005-01-07 | 2006-07-12 | 冲电气工业株式会社 | Emergency call system and emergency call method |
| CN101527897A (en) * | 2009-03-25 | 2009-09-09 | 曾杰 | Emergency communication method of wireless cell phone and wireless local area network and communication device |
| US20110201300A1 (en) * | 2010-02-18 | 2011-08-18 | Samuel Ornstein | Emergency contact information device and method |
| CN102244851A (en) * | 2011-06-27 | 2011-11-16 | 南京邮电大学 | Emergency radio communication method based on public telephone network |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263099A (en) * | 2015-08-28 | 2016-01-20 | 小米科技有限责任公司 | Method and device for sending position information |
| CN105263099B (en) * | 2015-08-28 | 2018-10-12 | 小米科技有限责任公司 | The method and apparatus for sending location information |
| WO2017097211A1 (en) * | 2015-12-09 | 2017-06-15 | Huawei Technologies Co., Ltd. | System and methods for critical communication |
| US10257684B2 (en) | 2015-12-09 | 2019-04-09 | Huawei Technologies Co., Ltd. | System and methods for critical communication |
| CN106550319A (en) * | 2015-12-11 | 2017-03-29 | 南方科技大学 | Wi-Fi authentication method and system |
| CN108809903A (en) * | 2017-05-02 | 2018-11-13 | 中国移动通信有限公司研究院 | A kind of authentication method, apparatus and system |
| CN108809903B (en) * | 2017-05-02 | 2021-08-10 | 中国移动通信有限公司研究院 | Authentication method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014201766A1 (en) | 2014-12-24 |
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