CN103152781B - Mining SIP mobile terminal automatic roaming changing method between mining wireless base station - Google Patents
Mining SIP mobile terminal automatic roaming changing method between mining wireless base station Download PDFInfo
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Abstract
The invention provides a kind of mining SIP mobile terminal automatic roaming changing method between mining wireless base station, its step comprises: the preset value 1. setting SIP mobile terminal: comprise wireless base station SSID, user name and password, automatically detection time cycle T 1, pre-linking signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3; 2. pre-linking is set up in moving process: 3. communication base station switches: when SIP mobile terminal reaches switching condition, disconnect the link of current base station, using pre-linking base station as new current base station 4. repeated execution of steps 2. with step 3., realize the automatic roaming of SIP mobile terminal under mine between base station.The method of pin of the present invention is succinctly efficient, significantly improves the property easy to use of mining SIP mobile terminal and mining wireless communication system and application practicality, can provide strong guarantee for safety in production under mine and efficiently carrying out smoothly of emergency management and rescue work.
Description
Technical field
The present invention relates to the mining SIP mobile terminal access technology field based on Session Initiation Protocol, be specifically related to the mining SIP mobile terminal method that automatic roaming switches between the wireless base station based on IEEE802.11 WLAN standard.
Background technology
Along with the arrival in mobile Internet epoch, the IP multimedia network technologies such as mine multimedia communications system is faced with by the past single fixing communication mode mobile communication mode evolving development to IP network, intellectuality, broadband, isomery syncretization, the reliable and wireless coverage easily extensible of wireless broadband communication, self-organizing and self-healing network, flexible configuration, multimedia transmission are greatly paid close attention to and application implementation in mine communication field.
IETF(internetengineeringtaskforce) Session Initiation Protocol of tissue proposition, have control flexibly, extensibility is strong, support the features such as distributed, cellular system and internet application can be merged, be defined as by 3GPP working group the core signaling protocol that 3-G (Generation Three mobile communication system) provides IP multimedia service, obtain good application.At present, transmitted mobile terminal and the intelligent terminal of Multimedia session interactive control information by Session Initiation Protocol, also more and more applied in mine IP communication network and mine wire/wireless UNE gradually.
Mine is a confined space physical environment strictly entering restriction.Underground Mine communication system is all independently planned as private network application system.Underground Mine wireless base station all has unified service unit mark (SSID).Therefore, SIP mobile terminal in down-hole same SSID and user name and password can link each mining wireless base station.Mining SIP mobile terminal is mainly by IEEE802.11 communication access mine IP communication network.The IP address of mining SIP mobile terminal itself can manual static configuration or device power-up time by DHCP automatic acquisition legitimate ip address, in follow-up normal use procedure, this terminal keeps this IP address constant.But; under present circumstances; multimedia call and communication is carried out when underground work personnel hold mining SIP mobile terminal; and when walking up and down between multiple mining wireless access AP base station or Mesh base station or move; often because mining SIP mobile terminal can not switch at multiple mining wireless base station internetwork roaming well; causing communication to suspend or interrupting, having a strong impact on downhole safety and produce and efficiently the carrying out smoothly of emergency management and rescue work.
Sip terminal automatic switching method is shown in research, as publication number be CN102655660A, name is called the Chinese patent literature of " method and system that automatically switches between many AP of sip terminal access WIFI ", relate to the method and system automatically switched between a kind of AP when wide area network WIFI accesses, the method is in the face of public access, when needing again to obtain new network ip address under terminal roaming to new base station, terminal needs new network ip address to be reported to central server, and the behavior pattern of central server needs customization adaptive with it simultaneously.The method is run comparatively complicated, and is difficult to for the technical scheme of wide area network the needs adapting to mining wireless communication system private network.
Summary of the invention
The object of the invention is: overcome the deficiencies in the prior art, for mining actual needs, provide a kind of succinctly efficient, practical mining SIP mobile terminal automatic roaming changing method between mining wireless base station.
Technical scheme of the present invention is: mining SIP mobile terminal of the present invention automatic roaming changing method between mining wireless base station, comprises the following steps:
1. set the preset value of SIP mobile terminal: comprise wireless base station SSID, user name and password, automatically detection time cycle T 1, pre-linking signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3;
2. set up pre-linking in moving process: SIP mobile terminal carries out comprising the interactive communication of signaling and media by current base station and SIP Centroid, meanwhile, this SIP mobile terminal detects other base station signals with cycle T 1 automatic detection time for the time interval; When this SIP mobile terminal moves, the wireless signal of other base stations detected and the base station reaching pre-linking signal threshold value P1 using wherein signal strength signal intensity performs pre-linking as pre-linking base station;
3. communication base station switches: when the difference that the signal strength signal intensity of SIP mobile terminal current base station used is less than disconnection signal threshold value P2 or pre-linking base station signal strength and current base station signal strength signal intensity is greater than difference in signal strength threshold value P3, establish the link successfully with pre-linking base station, disconnect the link of current base station, interactive communication is carried out as new current base station and SIP Centroid in pre-linking base station;
4. repeated execution of steps 2. with step 3., realize the automatic roaming of SIP mobile terminal under mine between base station.
Further scheme is: above-mentioned step 3. in, SIP mobile terminal radio link layer sends the system message or signal that switch to Session Initiation Protocol key-course, trigger Session Initiation Protocol key-course and retransmit SIP register command by new wireless link to SIP Centroid with this SIP mobile terminal former IP address, upgrade base station and the MAC Address of core network switches and the binding information of port, make this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station fast.
Further scheme is: above-mentioned step 3. in, if SIP mobile terminal current link base station causes the unexpected open circuit of current radio link because of situations such as unexpected power-off, pre-linking base station is directly switched to current link base station by SIP mobile terminal.
The present invention has positive effect: the application characteristic that the present invention is directed to mining SIP mobile terminal and mining IEEE802.11 cordless communication network itself, mining SIP mobile terminal automatic roaming changing method between mining wireless base station is proposed, after mining SIP mobile terminal implements method step of the present invention, do any specific amendment without the need to SIP Centroid or intermediary network device, the SIP mobile terminal automatic roaming handoff functionality meeting mine IP communication network and the application of mine wire/wireless UNE can be realized; Method of the present invention is succinctly efficient, significantly improves the property easy to use of mining SIP mobile terminal and mining wireless communication system and application practicality, can provide strong guarantee for safety in production under mine and efficiently carrying out smoothly of emergency management and rescue work.
Accompanying drawing explanation
Fig. 1 for mining SIP mobile terminal of the present invention between mining wireless base station automatic roaming changing method based on the network topological diagram of mining wireless communication system;
Fig. 2 is the flow chart of mining SIP mobile terminal of the present invention automatic roaming changing method between mining wireless base station.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
See Fig. 1, in mining wireless communication system, the communication of signaling and audio/video multimedia is carried out in the registration that SIP mobile terminal and other sip terminals are provided by SIP Centroid based on mine IP communication network and mine wire/wireless UNE, function of exchange.
SIP Centroid itself adopts back-to-back user agent (B2BUA) Model Design, and SIP Centroid is respectively as UAS(subscriber proxy server) and UAC(user agent client) participate in call setup and media reciprocal process.Signaling, the media of calling and called all carry out exchanging and processing through SIP Centroid alternately, to make Centroid meet down-hole centralized monitor and dispatch control requirement.Mine underground SIP mobile terminal accesses mine IP communication network and the intercommunication of SIP Centroid by mining wireless base station with IEEE802.11 communication.
Mining SIP mobile terminal automatic roaming changing method between mining wireless base station of the present embodiment, for 3 of arbitrary neighborhood Underground Mine radio communication base stations: called after base station 1, base station 2 and base station 3 illustrate its detailed process implemented respectively:
First, the SIP mobile terminal under mine need set 3 threshold values: the difference limen value P3 of pre-linking threshold value P1, disconnection current link base station signal strength threshold value P2 and pre-linking base station signal strength and current link base station signal strength.
Assuming that some SIP mobile terminal initial position distance base stations 1 are nearest under mine, this SIP mobile terminal realizes radio communication with base station 1 for current link base station and SIP Centroid; When this SIP mobile terminal is from base station 1 to the moving process of base station 2, this SIP mobile terminal detects the signal of base station 2 and base station 3 by its built-in wireless signal monitoring means; In these two base stations, base station 2 is comparatively near, more excellent to the quorum sensing inhibitor of this SIP mobile terminal; When the signal strength signal intensity that this SIP mobile terminal monitors base station 2 reaches threshold value P1, using base station 2 as pre-linking base station; When this SIP mobile terminal continues near base station 2, if when the difference of signal strength signal intensity and base station 1 signal strength signal intensity that the signal strength signal intensity of the base station 1 of this SIP mobile terminal is less than threshold value P2 or base station 2 is greater than threshold value P3, this SIP mobile terminal and base station 2 establish the link, and disconnect the link of base station 1, SIP register command is retransmitted by base station 2 to Centroid with former IP address, upgrade base station and the MAC Address of core network switches and the binding information of port, this SIP mobile terminal realizes radio communication by base station 2.Thus in transmission and reception both direction, realize the automatic roaming switching between base station 1 and base station 2 of this SIP mobile terminal.In like manner, this SIP mobile terminal continues to realize in base station 2 and base station 3 so that the automatic roaming between arbitrary base station switches.
See Fig. 2, mining SIP mobile terminal automatic roaming changing method between mining wireless base station of the present embodiment, specifically comprises the steps:
1. set the preset value of SIP mobile terminal: comprise wireless base station SSID, user name and password, automatically detection time cycle T 1, pre-linking signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3.
2. set up pre-linking in moving process: SIP mobile terminal carries out comprising the interactive communication of signaling and media by current base station and SIP Centroid, meanwhile, this SIP mobile terminal detects other base station signals with cycle T 1 automatic detection time for the time interval; When this SIP mobile terminal moves, the wireless signal of other base stations detected and the base station reaching pre-linking signal threshold value P1 using wherein signal strength signal intensity performs pre-linking as pre-linking base station.
3. communication base station switches: when the difference that the signal strength signal intensity of SIP mobile terminal current base station used is less than disconnection signal threshold value P2 or pre-linking base station signal strength and current base station signal strength signal intensity is greater than difference in signal strength threshold value P3, establish the link successfully with pre-linking base station, disconnect the link of current base station, interactive communication is carried out as new current base station and SIP Centroid in pre-linking base station.
4. repeated execution of steps 2. with step 3., realize the automatic roaming of SIP mobile terminal under mine between base station.
Aforesaid step 3. preferred scheme is: SIP mobile terminal radio link layer sends the system message or signal that switch to Session Initiation Protocol key-course, trigger Session Initiation Protocol key-course and retransmit SIP register command by new wireless link to SIP Centroid with this SIP mobile terminal former IP address, upgrade base station and the MAC Address of core network switches and the binding information of port, make this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station fast.
Aforesaid step 3. in, if SIP mobile terminal current link base station causes the unexpected open circuit of current radio link because of situations such as unexpected power-off, pre-linking base station is directly switched to current link base station by SIP mobile terminal.
To sum up, mining SIP mobile terminal automatic roaming changing method between mining wireless base station of the present embodiment, for the application characteristic of mining SIP mobile terminal and mining IEEE802.11 cordless communication network itself, provide mining SIP mobile terminal automatic roaming changing method between mining wireless base station.Mining SIP mobile terminal implements the method step of the present embodiment, do any specific amendment without the need to SIP Centroid or intermediary network device, the SIP mobile terminal automatic roaming handoff functionality meeting mine IP communication network and the application of mine wire/wireless UNE can be realized.The method is succinctly efficient, significantly improves the property easy to use of mining SIP mobile terminal and mining wireless communication system and application practicality, can provide strong guarantee for safety in production under mine and efficiently carrying out smoothly of emergency management and rescue work.
Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique without departing from the spirit and scope of the present invention; can also make various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into scope of patent protection of the present invention.
Claims (2)
1. mining SIP mobile terminal automatic roaming changing method between mining wireless base station, is characterized in that: comprise the following steps:
1. set the preset value of SIP mobile terminal: comprise wireless base station SSID, user name and password, automatically detection time cycle T 1, pre-linking signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3;
2. set up pre-linking in moving process: SIP mobile terminal carries out comprising the interactive communication of signaling and media by current base station and SIP Centroid, meanwhile, this SIP mobile terminal detects other base station signals with cycle T 1 automatic detection time for the time interval; When this SIP mobile terminal moves, the wireless signal of other base stations detected and the base station reaching pre-linking signal threshold value P1 using wherein signal strength signal intensity performs pre-linking as pre-linking base station;
3. communication base station switches: when the difference that the signal strength signal intensity of SIP mobile terminal current base station used is less than disconnection signal threshold value P2 or pre-linking base station signal strength and current base station signal strength signal intensity is greater than difference in signal strength threshold value P3, establish the link successfully with pre-linking base station, disconnect the link of current base station, interactive communication is carried out as new current base station and SIP Centroid in pre-linking base station; SIP mobile terminal radio link layer sends the system message or signal that switch to Session Initiation Protocol key-course, trigger Session Initiation Protocol key-course and retransmit SIP register command by new wireless link to SIP Centroid with this SIP mobile terminal former IP address, upgrade base station and the MAC Address of core network switches and the binding information of port, make this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station fast;
4. repeated execution of steps 2. with step 3., realize the automatic roaming of SIP mobile terminal under mine between base station.
2. mining SIP mobile terminal according to claim 1 automatic roaming changing method between mining wireless base station, it is characterized in that: described step 3. in, if SIP mobile terminal current link base station causes the unexpected open circuit of current radio link because of situations such as unexpected power-off, pre-linking base station is directly switched to current link base station by SIP mobile terminal.
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| US9961125B2 (en) | 2013-07-31 | 2018-05-01 | Microsoft Technology Licensing, Llc | Messaging API over HTTP protocol to establish context for data exchange |
| US10440066B2 (en) | 2013-11-15 | 2019-10-08 | Microsoft Technology Licensing, Llc | Switching of connection protocol |
| CN103731890A (en) * | 2013-12-11 | 2014-04-16 | 福建星网锐捷网络有限公司 | Link switching method under high-speed motion state, vehicle-mounted AP and system |
| CN105050146A (en) * | 2015-05-28 | 2015-11-11 | 上海精吉通讯技术有限公司 | Roaming switching method |
| CN107071819A (en) * | 2017-04-17 | 2017-08-18 | 中国神华能源股份有限公司 | A kind of method and system of ore deposit downhole data transmission |
| CN108012301A (en) * | 2017-11-29 | 2018-05-08 | 广东欧珀移动通信有限公司 | A kind of mobile terminal and its method for connecting network, computer-readable recording medium |
| CN112188409B (en) * | 2020-09-07 | 2022-02-08 | 天地（常州）自动化股份有限公司 | BLE network suitable for mine space and roaming communication method |
| CN116782132B (en) * | 2022-03-11 | 2024-03-08 | 汉朔科技股份有限公司 | Electronic price tag network access and roaming communication method and system |
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| CN101969677A (en) * | 2005-12-27 | 2011-02-09 | 富士通株式会社 | Mobile control device, handover control method and mobile communication system |
| CN101765222A (en) * | 2008-12-26 | 2010-06-30 | 刘杰 | Method for keeping IP address and data after AP is switched in Wi-Fi communication |
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