CN103152781A - Method for automatically roaming and switching mining SIP (Session Initiation Protocol) mobile terminal among mining wireless base stations - Google Patents
Method for automatically roaming and switching mining SIP (Session Initiation Protocol) mobile terminal among mining wireless base stations Download PDFInfo
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Abstract
The invention provides a method for automatically roaming and switching a mining SIP (Session Initiation Protocol) mobile terminal among mining wireless base stations. The method comprises the following steps of: (1) presetting the preset value of the SIP mobile terminal, wherein the preset valve comprises a wireless base station SSID (Service Set Identifier), a user name and password, an automatic detecting time period T1, a prelink signal threshold value P1, a disconnection signal threshold value P2, a signal strength difference threshold value P3; (2) establishing a prelink in a moving process; (3) switching among communication base stations: when the SIP mobile terminal is up to a switching condition, unlinking a current base station, wherein a prelink base station is taken as a new current base station; and (4) repeating the steps (2) and (3) to realize automatic roaming of the SIP mobile terminal among base stations under a coal mine. The method is easy and efficient, the use convenience and application practicability of the mining SIP mobile terminal and a mining wireless communication system are improved remarkably, and powerful guarantee can be provided for safe production under coal mines and successful efficient performance of emergency 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 is switched between based on the wireless base station of IEEE802.11 WLAN standard.
Background technology
Arrival along with the mobile Internet epoch, the mine multimedia communications system is being faced with by the mobile communication mode evolving development of single fixing communication mode of past to IP network, intellectuality, broadband, isomery syncretization, and wireless broadband communication, self-organizing and self-healing network, flexible configuration, multimedia transmission is reliable and wireless coverage the IP multimedia network technology such as can be expanded and greatly paid close attention to and application implementation in the mine communication field.
IETF(internet engineering task force) Session Initiation Protocol of tissue proposition, have the characteristics such as flexible, that extensibility is strong, support is distributed of controlling, 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 the IP multimedia service, obtained using preferably.At present, transmit mobile terminal and the intelligent terminal of the mutual control information of Multimedia session by Session Initiation Protocol, also more and more used in mine IP communication network and mine wire/wireless UNE gradually.
Mine is strictly to enter the confined space of restriction on a physical environment.The Underground Mine communication system is all independently planned as the private network application system.The Underground Mine wireless base station all has unified service unit sign (SSID).Therefore, down-hole SIP mobile terminal can same SSID and user name and password 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 manually when static configuration or device power-up by legitimate ip address of DHCP automatic acquisition, in follow-up normal use procedure, this terminal keeps this IP address constant.But; under present circumstances; carry out multimedia call and communicate by letter when the underground work personnel hold mining SIP mobile terminal; and walk up and down between a plurality of mining wireless access AP base station or Mesh base station or when mobile; often can not switch at a plurality of mining wireless base station internetwork roamings well because of mining SIP mobile terminal; cause communication to suspend or interrupt, having a strong impact on efficiently carrying out smoothly of downhole safety production and emergency management and rescue work.
The sip terminal automatic switching method has been seen research, be that CN102655660A, name are called the Chinese patent literature of " method and system that sip terminal access WIFI automaticallyes switch " between many AP as publication number, the method and system that automaticallyes switch between a kind of AP when relating to wide area network WIFI access, the method is in the face of public access, when terminal roaming needs again to obtain new network ip address under new base station, terminal need to report to central server with new network ip address, and the behavior pattern of central server needs customization adaptive with it simultaneously.The method operation is comparatively complicated, and is difficult to adapt to the needs of mining wireless communication system private network for the technical scheme of wide area network.
Summary of the invention
The objective 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-link signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3;
2. set up pre-link in moving process: the SIP mobile terminal comprises the interactive communication of signaling and media by current base station and SIP Centroid, simultaneously, this SIP mobile terminal take automatic detection time cycle T 1 detect other base station signals as the time interval; When this SIP mobile terminal moved, pre-link was carried out as pre-link base station in the base station that the wireless signal of other base stations detected and reach pre-link signal threshold value P1 with signal strength signal intensity wherein;
3. communication base station switches: when the signal strength signal intensity of SIP mobile terminal current base station used less than disconnection signal threshold value P2 or link in advance base station signal strength and the difference of current base station signal strength signal intensity during greater than difference in signal strength threshold value P3, with pre-link the base station set up link successfully after, disconnect the link of current base station, carry out interactive communication with linking in advance the base station as new current base station and SIP Centroid;
4. repeated execution of steps 2. with step 3., realize the automatic roaming between the base station under mine of SIP mobile terminal.
Further scheme is: above-mentioned step 3. in, SIP mobile terminal radio link layer sends system message or the signal that switches to the Session Initiation Protocol key-course, trigger the Session Initiation Protocol key-course with the former IP of this SIP mobile terminal address by new Radio Link to SIP Centroid repeating transmission SIP register command, upgrade base station and the MAC Address of core network switches and the binding information of port, make fast this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station.
Further scheme is: above-mentioned step 3. in, if SIP mobile terminal current link base station causes the current wireless link to open circuit suddenly because of situations such as unexpected outages, the SIP mobile terminal directly will link in advance the base station and switch to the current link base station.
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 is implemented method step of the present invention, need not SIP Centroid or intermediary network device and do any specific modification, can realize meeting the SIP mobile terminal automatic roaming handoff functionality of mine IP communication network and the application of mine wire/wireless UNE; Method of the present invention is succinctly efficient, has significantly improved the property easy to use and application practicality of mining SIP mobile terminal and mining wireless communication system, can provide strong guarantee for safety in production and efficiently carrying out smoothly of emergency management and rescue work under mine.
Description of drawings
Fig. 1 be mining SIP mobile terminal of the present invention between mining wireless base station the 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
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
(embodiment 1)
See Fig. 1, in the mining wireless communication system, registration, the function of exchange that SIP mobile terminal and other sip terminals provide by the SIP Centroid based on mine IP communication network and mine wire/wireless UNE carried out communicating by letter of signaling and audio/video multimedia.
SIP Centroid itself adopts back-to-back user agent (B2BUA) Model Design, and the SIP Centroid is respectively as the UAS(subscriber proxy server) and the UAC(user agent client) participate in call setup and media reciprocal process.The signaling of calling and called, media all pass through alternately the SIP Centroid and exchange and process, in order to make Centroid satisfy 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 the IEEE802.11 communication.
Mining SIP mobile terminal automatic roaming changing method between mining wireless base station of the present embodiment, take 3 Underground Mine radio communication base stations of arbitrary neighborhood: called after base station 1, base station 2 and base station 3 illustrate the detailed process of its enforcement as example respectively:
At first, the SIP mobile terminal under mine need be set 3 threshold values: link in advance threshold value P1, disconnect current link base station signal strength threshold value P2 and link in advance base station signal strength and the difference limen value P3 of current link base station signal strength.
Suppose that under mine, some SIP mobile terminal initial positions are nearest apart from base station 1, this SIP mobile terminal 1 is realized radio communication as current link base station and SIP Centroid take the base station; From base station 1 to the base station 2 moving process, this SIP mobile terminal detects the signal of base station 2 and base station 3 by its built-in wireless signal monitoring means when this SIP mobile terminal; In these two base stations, base station 2 is nearer, and is more excellent to the signal covering of this SIP mobile terminal; When the signal strength signal intensity that monitors base station 2 when this SIP mobile terminal reaches threshold value P1, with base station 2 as pre-link base station; When this SIP mobile terminal continues near base station 2, if the signal strength signal intensity of the base station 1 of this SIP mobile terminal is less than the difference of the signal strength signal intensity of threshold value P2 or base station 2 and base station 1 signal strength signal intensity during greater than threshold value P3, this SIP mobile terminal is set up with base station 2 and is linked, and disconnect the link of base station 1, retransmit SIP register command 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 is realized radio communication by base station 2.Thereby realizing the automatic roaming switching between base station 1 and base station 2 of this SIP mobile terminal on the sending and receiving both direction.In like manner, this SIP mobile terminal continues to realize to switch down to the automatic roaming of arriving between arbitrary base station in base station 2 and base station 3.
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-link signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3.
2. set up pre-link in moving process: the SIP mobile terminal comprises the interactive communication of signaling and media by current base station and SIP Centroid, simultaneously, this SIP mobile terminal take automatic detection time cycle T 1 detect other base station signals as the time interval; When this SIP mobile terminal moved, pre-link was carried out as pre-link base station in the base station that the wireless signal of other base stations detected and reach pre-link signal threshold value P1 with signal strength signal intensity wherein.
3. communication base station switches: when the signal strength signal intensity of SIP mobile terminal current base station used less than disconnection signal threshold value P2 or link in advance base station signal strength and the difference of current base station signal strength signal intensity during greater than difference in signal strength threshold value P3, with pre-link the base station set up link successfully after, disconnect the link of current base station, carry out interactive communication with linking in advance the base station as new current base station and SIP Centroid.
4. repeated execution of steps 2. with step 3., realize the automatic roaming between the base station under mine of SIP mobile terminal.
Aforesaid step 3. preferred scheme is: SIP mobile terminal radio link layer sends system message or the signal that switches to the Session Initiation Protocol key-course, trigger the Session Initiation Protocol key-course with the former IP of this SIP mobile terminal address by new Radio Link to SIP Centroid repeating transmission SIP register command, upgrade base station and the MAC Address of core network switches and the binding information of port, make fast this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station.
Aforesaid step 3. in, if SIP mobile terminal current link base station causes the current wireless link to open circuit suddenly because of situations such as outages suddenly, the SIP mobile terminal directly will link in advance the base station and switch to the current link base station.
To sum up, mining SIP mobile terminal automatic roaming changing method between mining wireless base station of the present embodiment, application characteristic for mining SIP mobile terminal and mining IEEE802.11 cordless communication network itself provides mining SIP mobile terminal automatic roaming changing method between mining wireless base station.Mining SIP mobile terminal is implemented the method step of the present embodiment, need not SIP Centroid or intermediary network device and do any specific modification, can realize meeting the SIP mobile terminal automatic roaming handoff functionality of mine IP communication network and the application of mine wire/wireless UNE.The method is succinctly efficient, has significantly improved the property easy to use and application practicality of mining SIP mobile terminal and mining wireless communication system, can provide strong guarantee for safety in production and efficiently carrying out smoothly of emergency management and rescue work under mine.
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 variation and obtain the corresponding technical scheme that is equal to, so all technical schemes that are equal to all should be included into scope of patent protection of the present invention.
Claims (3)
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-link signal threshold value P1, disconnection signal threshold value P2, difference in signal strength threshold value P3;
2. set up pre-link in moving process: the SIP mobile terminal comprises the interactive communication of signaling and media by current base station and SIP Centroid, simultaneously, this SIP mobile terminal take automatic detection time cycle T 1 detect other base station signals as the time interval; When this SIP mobile terminal moved, pre-link was carried out as pre-link base station in the base station that the wireless signal of other base stations detected and reach pre-link signal threshold value P1 with signal strength signal intensity wherein;
3. communication base station switches: when the signal strength signal intensity of SIP mobile terminal current base station used less than disconnection signal threshold value P2 or link in advance base station signal strength and the difference of current base station signal strength signal intensity during greater than difference in signal strength threshold value P3, with pre-link the base station set up link successfully after, disconnect the link of current base station, carry out interactive communication with linking in advance the base station as new current base station and SIP Centroid;
4. repeated execution of steps 2. with step 3., realize the automatic roaming between the base station under mine of SIP mobile terminal.
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, SIP mobile terminal radio link layer sends system message or the signal that switches to the Session Initiation Protocol key-course, trigger the Session Initiation Protocol key-course with the former IP of this SIP mobile terminal address by new Radio Link to SIP Centroid repeating transmission SIP register command, upgrade base station and the MAC Address of core network switches and the binding information of port, make fast this SIP mobile terminal receive call signaling and the media data packet of SIP Centroid from new current link base station.
3. 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 current wireless link to open circuit suddenly because of situations such as suddenly outages, the SIP mobile terminal directly will link in advance the base station and switch to the current link base station.
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Cited By (10)
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| 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 |
| US9961125B2 (en) | 2013-07-31 | 2018-05-01 | Microsoft Technology Licensing, Llc | Messaging API over HTTP protocol to establish context for data exchange |
| CN108012301A (en) * | 2017-11-29 | 2018-05-08 | 广东欧珀移动通信有限公司 | A mobile terminal, its network connection method, and a computer-readable storage medium |
| US10440066B2 (en) | 2013-11-15 | 2019-10-08 | Microsoft Technology Licensing, Llc | Switching of connection protocol |
| CN112188409A (en) * | 2020-09-07 | 2021-01-05 | 天地（常州）自动化股份有限公司 | BLE network suitable for mine space and roaming communication method |
| CN115297517A (en) * | 2022-08-30 | 2022-11-04 | 中煤科工集团重庆研究院有限公司 | Roaming switching method for mine Wi-Fi6 wireless communication system |
| CN116782132A (en) * | 2022-03-11 | 2023-09-19 | 汉朔科技股份有限公司 | Electronic price tag network access and roaming communication method and system |
| US12207187B2 (en) | 2022-03-11 | 2025-01-21 | Hanshow Technology Co., Ltd. | Method and system for electronic shelf label network access and roaming communication preliminary class |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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| CN115297517A (en) * | 2022-08-30 | 2022-11-04 | 中煤科工集团重庆研究院有限公司 | Roaming switching method for mine Wi-Fi6 wireless communication system |
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