CN101765170B - Method for switching fast walkthrough of WLAN terminal with dual-radio-frequency module - Google Patents
Method for switching fast walkthrough of WLAN terminal with dual-radio-frequency module Download PDFInfo
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- CN101765170B CN101765170B CN 200810207786 CN200810207786A CN101765170B CN 101765170 B CN101765170 B CN 101765170B CN 200810207786 CN200810207786 CN 200810207786 CN 200810207786 A CN200810207786 A CN 200810207786A CN 101765170 B CN101765170 B CN 101765170B
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Abstract
The invention relates to a method for switching the fast walkthrough of a WLAN terminal with a dual-radio-frequency module. The method comprises role differentiation of the dual-radio-frequency module; uniform interface externally displayed by the terminal; physical separation between scanning process and service process; improvement of reliability of an AP set maintained by a backup module; fullsoft switching of walkthrough; and the AP (Access Point) being (wireless) access point. Compared with the prior art, the invention has the advantages that the walkthrough switching time is more accurate; the walkthrough switching misjudgment rate is lower; the full soft switching of the terminal walkthrough is realized; and the real-time service under high-speed movement is supported.
Description
Technical field
The present invention relates to support under the high-speed moving state changing method of a kind of WLAN terminal fast roaming of real time business, relate in particular to a kind of changing method of fast walkthrough of WLAN terminal with dual-radio-frequency module.
Background technology
The shortcoming of standard WLAN terminal roaming comprises at present: the roaming switching time is inaccurate; Up-downgoing packet loss in the roam procedure; Can't support the real time business under the high-speed mobile situation.The better real time business of supporting under the high-speed mobile situation, the level and smooth soft handover of realizing standard WLAN terminal is the problem that needs solution.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the defective that above-mentioned prior art exists, a kind of changing method of fast walkthrough of WLAN terminal with dual-radio-frequency module of precise and high efficiency to be provided.
Purpose of the present invention can be achieved through the following technical solutions: a kind of changing method of fast walkthrough of WLAN terminal with dual-radio-frequency module is characterized in that this method comprises:
(1) role of double frequency module distinguishes;
(2) terminal externally presents the interface unanimity;
(3) physical separation of scanning process and business procedure;
(4) confidence level of the AP collection of raising backup module maintenance;
(5) roam complete soft handover;
Described AP (Access Point) is (wireless) access points.
The method that the role of described double frequency module distinguishes is: be divided into work role and scanning role according to the module current working state.
The method that described terminal externally presents the interface unanimity is: the double frequency module of terminal provides the unified MAC address, and during the radio-frequency module role exchange of terminal, network side need not to know the variation of terminal, and extraneous AP only can see a terminal.
The method of the physical separation of described scanning process and business procedure is:
(1) is in reception and the transmission of a radio-frequency module deal with data business of work role;
(2) radio-frequency module that is in the scanning role is handled scanning process, upgrades the AP Candidate Set;
(3) radio-frequency module that is in work role will compare better AP in the AP Candidate Set under the bad situation of link-quality, if there is better AP, then notice is in related this AP of radio-frequency module of scanning role, after being successfully associated, and role exchange.
The method of the confidence level of the AP collection that described raising backup module is safeguarded is:
The AP Candidate Set is produced by the probing response frame that terminal receives, terminal receives probing response frame itself can be fewer, if reflect its current link quality in real time truly, need to adopt the smoothing parameter of better the present situation of reflection in real time, the signal quality that smoothing parameter need embody current message accounts for more at high proportion.
The method of the complete soft handover of described roaming comprises:
When (1) roaming was switched, two radio-frequency modules all had been associated to AP;
(2) handover operation is to send at new radio-frequency module to upgrade two layers of routing broadcast message, and message sends from new radio-frequency module;
(3) after roaming was switched, old work radio-frequency module kept receiving a period of time, prevented that downlink data message from losing.
Compared with prior art, the present invention has the following advantages:
(1) the roaming switching time is more accurate;
(2) roaming switching False Rate is lower;
(3) the complete soft handover of terminal roaming;
(4) real time business under the support high-speed mobile.
Embodiment
The present invention is the changing method of supporting a kind of fast walkthrough of WLAN terminal with dual-radio-frequency module of real time business under the high-speed moving state, implement the level and smooth soft handover that this method can realize standard WLAN terminal, effectively solve the service application under the high-speed mobile situation, expand the range of application of wlan network.
Terminal externally presents the interface unanimity: for the professional upper strata of terminal, only provide a same equipment interface, an equipment interface is only seen on the upper strata, and concrete service message is sent by the radio-frequency module that is in work role; Opposite end AP for terminal provides unified MAC, and when making the radio-frequency module role exchange of terminal, network side need not to know that terminal changes.
The double frequency module is divided work role according to its current working state, and the different operating role is responsible for different processing procedures.The terminal scanning process is separated with business procedure physics, is in reception and the transmission of a radio-frequency module deal with data business of work role, no longer carries out scanning process; Scanning process is handled by another radio-frequency module, and upgrades the AP Candidate Set.
Be in the radio-frequency module of work role under the bad situation of link-quality, will in the AP Candidate Set, search the better AP of link-quality, if there is the better AP of link-quality, then notify another radio-frequency module related this AP, after being successfully associated, the role exchange of two radio-frequency modules, and send by new radio-frequency module and to upgrade two layers of routing broadcast message, data message change by new work radio-frequency module and send.Simultaneously, behind the role exchange, keep old work radio-frequency module operating state a period of time, prevent that downlink data message from losing.
The AP Candidate Set that scanning is obtained is obtained by less management frames, under the high-speed mobile situation, needs true its current link quality of reflection in real time, adopts the smoothing parameter of the better link-quality of reflection in real time, and the signal quality of current message will account for more at high proportion.
Claims (3)
1. the changing method of the fast roaming of the WLAN terminal with dijection frequency module is characterized in that this method comprises:
(1) role of dijection frequency module distinguishes;
(2) the interface unanimity that externally presents of the dijection frequency module of WLAN terminal;
(3) physical separation of scanning process and business procedure;
(4) improve the confidence level of the link quality parameter of the AP Candidate Set that the radio-frequency module be in the scanning role safeguards;
(5) roam level and smooth soft handover;
Described AP(Access Point) be wireless access points;
The method that the role of described dijection frequency module distinguishes is: be divided into work role and scanning role according to the module current working state;
The method of the physical separation of described scanning process and business procedure is:
(1) is in reception and the transmission of a radio-frequency module deal with data business of work role;
(2) radio-frequency module that is in the scanning role is handled scanning process, upgrades the AP Candidate Set;
(3) be in the radio-frequency module of work role under the bad situation of link-quality, will compare better AP in the AP Candidate Set, if there is better AP, then notice is in related this better AP of radio-frequency module of scanning role, after being successfully associated, dijection frequency module role exchange;
The method of confidence level that described raising is in the link quality parameter of the AP Candidate Set that scanning role's radio-frequency module safeguards is:
The AP Candidate Set is produced by the probing response frame that the WLAN terminal receives, the WLAN terminal receives probing response frame itself can be fewer, if reflect its current link quality in real time truly, need to adopt the smoothing parameter of the current link circuit condition of better reflection in real time, the signal quality that smoothing parameter need embody current response frame accounts for more at high proportion.
2. the changing method of the fast roaming of a kind of WLAN terminal with dijection frequency module according to claim 1, it is characterized in that, the method that the dijection frequency module of described WLAN terminal externally presents the interface unanimity is: the dijection frequency module of WLAN terminal provides the unified MAC address, during the dijection frequency module role exchange of WLAN terminal, network side need not to know the variation of WLAN terminal, and extraneous AP only can see a WLAN terminal.
3. the changing method of the fast roaming of a kind of WLAN terminal with dijection frequency module according to claim 1 is characterized in that the method for the level and smooth soft handover of described roaming comprises:
When (1) roaming was switched, the dijection frequency module all had been associated to AP;
(2) handover operation is to send at the radio-frequency module that newly is in work role to upgrade the routing broadcast message, and message sends from the radio-frequency module that newly is in work role;
(3) after roaming was switched, the former radio-frequency module that is in work role kept downlink data receiving message a period of time, prevented that downlink data message from losing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200810207786 CN101765170B (en) | 2008-12-25 | 2008-12-25 | Method for switching fast walkthrough of WLAN terminal with dual-radio-frequency module |
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| CN 200810207786 CN101765170B (en) | 2008-12-25 | 2008-12-25 | Method for switching fast walkthrough of WLAN terminal with dual-radio-frequency module |
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| CN101765170A CN101765170A (en) | 2010-06-30 |
| CN101765170B true CN101765170B (en) | 2013-08-21 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015222309B4 (en) * | 2015-11-12 | 2020-11-05 | Volkswagen Aktiengesellschaft | Device, method and computer program for frequency band selection |
| CN112689313B (en) * | 2016-05-31 | 2022-02-08 | 荣耀终端有限公司 | Method for switching access point and terminal equipment |
| CN106454902A (en) * | 2016-11-14 | 2017-02-22 | 锐捷网络股份有限公司 | Roaming method and device in wireless local area network |
| CN107046699B (en) * | 2017-04-27 | 2020-07-07 | 新华三技术有限公司 | Wireless terminal roaming method and device |
| CN109362110B (en) * | 2018-12-17 | 2021-06-18 | 锐捷网络股份有限公司 | Roaming switching method, equipment, network and storage medium |
| CN111417103A (en) * | 2020-03-27 | 2020-07-14 | 深圳市三旺通信股份有限公司 | System and method for realizing W L AN seamless roaming based on multiple radio frequencies |
| CN111698742B (en) * | 2020-06-08 | 2023-03-21 | 锐捷网络股份有限公司 | Data communication method, terminal device, electronic device, and computer storage medium |
| CN117014857A (en) * | 2022-04-30 | 2023-11-07 | 华为技术有限公司 | Roaming method, equipment and communication system |
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| CN1614926A (en) * | 2003-09-10 | 2005-05-11 | 大唐电信科技股份有限公司无线通信分公司 | Wireless moile double-mode network card, method for its working mode control and power supply management |
| CN1720756A (en) * | 2002-12-19 | 2006-01-11 | 诺基亚公司 | System and handover mechanism in frequency multiple band environment and equipment therefor |
| CN101141735A (en) * | 2006-09-07 | 2008-03-12 | 三星电子株式会社 | Apparatus and method for preventing power consumption in multi-mode portable terminal |
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| CN1720756A (en) * | 2002-12-19 | 2006-01-11 | 诺基亚公司 | System and handover mechanism in frequency multiple band environment and equipment therefor |
| CN1614926A (en) * | 2003-09-10 | 2005-05-11 | 大唐电信科技股份有限公司无线通信分公司 | Wireless moile double-mode network card, method for its working mode control and power supply management |
| CN101141735A (en) * | 2006-09-07 | 2008-03-12 | 三星电子株式会社 | Apparatus and method for preventing power consumption in multi-mode portable terminal |
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Address after: 200241 Dongchuan Road, Shanghai, No. 555, building, floor 6, 02B Applicant after: Shanghai Huanchuang Communication Technology Co., Ltd. Address before: 200241, room 6, building 555, 602 Dongchuan Road, Shanghai, Minhang District Applicant before: Shanghai Gbcom Co., Ltd. |
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