CN1697544A - Method for implementing point to point calls for alone station - Google Patents
Method for implementing point to point calls for alone station Download PDFInfo
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- CN1697544A CN1697544A CN 200410037920 CN200410037920A CN1697544A CN 1697544 A CN1697544 A CN 1697544A CN 200410037920 CN200410037920 CN 200410037920 CN 200410037920 A CN200410037920 A CN 200410037920A CN 1697544 A CN1697544 A CN 1697544A
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Abstract
Coincidence relation list between MSISDN and IMSI of mobile station is set up in base station. Following steps is included in the method: mobile station of call party sends request message of containing layer three point to point service call of MSISDN of called party to base station; throught he said coincidence relation list, base station queries IMSI corresponding to called MSISDN; base station broadcasts seeking message including current IMSI; receiving the seeking message, called party sends response message including own IMSI to base station; receiving the said response message, base station determines corresponding mobile station of call party, assigns channels for calling and called mobile stations; after junction of channels, base station sends message of successful junction to inform calling and called stations so as to realize point to point operation call under isolated station. The invention provides basic communication service even broken chain occurs at base station.
Description
Technical field
The present invention relates to mobile network's service call method, be meant the implementation method of a kind of lonely station point to point call especially.
Background technology
Adopt the cluster private network to build thinking development trunking communication network, because technology and system examination differ, each group independently builds, and forms the construction situation of doing things in his own way easily, causes the frequency utilization inefficiency, drawbacks such as network construction cost and network operation expense height.Along with the trunking communication technology is developed by simulation-to-digital, the cluster network construction presents by independent private network construction to the trend of cluster common network Construction Party to development.Because global system for mobile communications (GSM) systems technology system advanced person, in worldwide, has user base the most widely, and the international standard whole world railway mobile communication system (GSM-R) that a cover is used for the railway mobile communication has been made in Europe, it, can provide to strengthen multipriority and seize basic cluster communication services such as (eMLPP) business, speech group-calling service (VGCS) and voice broadcast service (VBS) business as service bearer with the gsm communication technology.Therefore, development not only is fit to China's national situation based on the digital cluster system of GSM, also possesses good technical foundation.
Base station site is many, distribution is wide because the intrinsic network configuration characteristics of cellular system have, and the base station is to the physical connection complexity of base station controller, the middle tandem switching that often will pass through transmission equipment, add the diversity of transmission equipment, attendant's quality is uneven, therefore be difficult to guarantee that all base stations to the transmission of base station controller always keeps normal connection status, under the GSM system between base station and the base station controller interface, i.e. Abis interface transmission chain rupture happens occasionally.
Usually, serve popular GSM public network construction and serve public security, the availability that the cluster common network based on gsm system of fire-fighting and respective government agencies is built for base station services requires different, the GSM public network is served masses, during because of base station transmits chain rupture interrupting service, generally can not cause very big loss, and because there is not the regional extent feature in the service of GSM public network, be that the object that generally will call out of user and its regional probability under same base station covers are little, therefore, to provide professional demand for the base station under Abis interface transmission chain rupture situation be not very urgent to the GSM public network.
And the such particular service of image set group business is owing to exist obvious regional feature, be that the object that will call out of user and its regional probability under same base station covers are bigger, often effective in certain zone, as: some department's group service only limits to the zone that certain or certain several base stations cover probably, the availability of cluster department service is directly connected to normally carrying out of cluster department service, in case professional the interruption, may cause irremediable loss.
Therefore, how to make the base station still can be under transmission chain rupture situation, thereby guarantee that normally carrying out of cluster department work is a problem that urgency is to be solved for the such business that network service quality is had relatively high expectations of image set group business provides basic communication support.
Summary of the invention
In view of this, main purpose of the present invention is to provide the implementation method of a kind of lonely station point to point call, realizes that the point-to-point service between the travelling carriage is called out in the lonely station, even make the base station under the situation of transmission chain rupture, still can provide basic communication service
The implementation method of a kind of lonely station provided by the invention point to point call is provided with its travelling carriage number of having jurisdiction over travelling carriage in the Serving cell and the mapping table of user ID, and may further comprise the steps in the base station:
A) the caller travelling carriage sends the layer three point-to-point service call request message that include the called mobile station number to the base station;
B) after layer three point-to-point service call request message are received in the base station, inquire about the user ID of current called mobile station number correspondence by the mapping table of travelling carriage number and user ID;
C) beep-page message that broadcast packet in the Serving cell contains active user's sign is had jurisdiction at it in the base station;
D) behind the beep-page message that travelling carriage is received, judge whether the user ID in this beep-page message is the user ID of self, if, then travelling carriage sends the page response business request information include self user ID to the base station, enter step e), otherwise travelling carriage is not done any response;
E) after the page response business request information is received in the base station, determine the caller travelling carriage that request and this called mobile station foundation calling are connected according to the user ID that provides in this message, the base station is caller and called mobile station difference distribution service channel, and carry out after channel continues, send the continue notification message of success of travelling carriage to caller and called mobile station respectively.
The described step a) of this method takes a step forward and comprises: the base station is detected the Abis interface transmission in real time, judges whether normally, if then keep the network normal operation mode, otherwise the system message that enters lonely station operational mode is broadcasted in the base station on the BCCH channel.
The described system message that enters lonely station operational mode is periodically broadcasted in the described base station of this method.
This method further comprises the mobile station position update process:
A. travelling carriage sends complete layer three position include self travelling carriage number and user ID to the base station and upgrades business request information;
B. travelling carriage number and the user ID upgraded in the business request information of complete layer three position that will receive, base station is kept in described travelling carriage number and the user ID mapping table;
C. the base station is upgraded to this travelling carriage home position and is accepted message.
The described travelling carriage of this method step A sends when business request information is upgraded in described holostrome three positions and further comprises: travelling carriage starts lonely station operational mode position renewing timer;
After if lonely station operational mode position renewing timer is overtime, travelling carriage is not received yet that described position that the base station is returned is upgraded and is accepted message, then returns steps A.
The described position updating process of this method is to carry out in the starting stage that travelling carriage enters lonely station operational mode, and/or periodically carries out after entering lonely station operational mode.
This method step b) described process of searching current called mobile station number respective user sign further comprises, judge whether to find, if, then return the call request acknowledge message to the caller travelling carriage, enter step c), otherwise, return call request refuse information, process ends to the caller travelling carriage.
This method step c) described base station further comprises in the time of the travelling carriage broadcast paging messages: base station initiated lonely station operational mode page response timer;
If behind the operational mode page response timer expiry of lonely station, the base station is not received the page response business request information that described called mobile station is returned yet, then the base station sends the call request refuse information to the caller travelling carriage.
This method step a) described travelling carriage sends layer three a point-to-point service call request message and takes a step forward and comprise: the caller travelling carriage carries out the channel access procedure;
The described called mobile station of step d) takes a step forward to base station transmission page response business request information and comprises: called mobile station is carried out the channel access procedure.
The Traffic Channel that the described caller travelling carriage of this method inserts adopts identical channelling mode with the Traffic Channel that called mobile station inserts.
This method step d) described travelling carriage sends the page response business request information include self user ID to the base station and takes a step forward and comprise: travelling carriage sends page-response message to the base station.
This method step e) user ID that provides according to the page response business request information of described base station determines that request and this called mobile station set up the process of calling out the caller travelling carriage that connects and specifically comprise: the corresponding travelling carriage number of current CSI called subscriber identification is searched in the base station in described travelling carriage number and user ID mapping table, determine the caller travelling carriage that request is connected with this called mobile station foundation calling according to this travelling carriage number.
This method step e) travelling carriage that sends to caller and called mobile station of the described base station success notification message that continues is a CONNECT message.
This method step e) further comprises after: after travelling carriage is received described CONNECT message, send the information that can begin to talk to the user.
The described travelling carriage number of this method is MSISDN, and described user ID is ground, an IMSI or process certain conversion back identification code.
From above as can be seen, the implementation method of lonely station provided by the invention point to point call, by Mobile Subscriber International ISDN number (MSISDN) and IMSI International Mobile Subscriber Identity (IMSI) corresponding relation of in the base station, setting up travelling carriage, and set up point-to-point channel between caller and called mobile station technological means such as continue according to call request by the base station, realized the point to point call under the situation of lonely station.Thereby a kind of new base station mode of operation is provided, has made the base station under the situation that the Abis interface transmission is interrupted, still can provide point-to-point basic communication service.Make this class of cluster department service to network service quality the business of specific (special) requirements be arranged, can not interrupt fully because of this base station Abis interface transmission problem, what guarantee the work of cluster department normally carries out the loss of having avoided service disconnection to bring.
Description of drawings
Fig. 1 is the position updating process schematic diagram of the embodiment of the invention;
Fig. 2 is the point-to-point calling procedure schematic diagram in the lonely station of embodiment of the invention group service.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Thinking of the present invention is to provide two kinds of operational modes for the base station: Network operation mode and lonely station operational mode.Transmission keeps constantly detecting to its Abis interface in the base station, and determines the present mode of operation of this base station according to detected Abis interface transmission state, when the transmission of base station Abis interface just often, the base station is in Network operation mode, and normal business is provided; When base station Abis interface transmission chain rupture, the base station switches to lonely station operational mode, and the most basic point-to-point service is provided, and can also provide other business in addition, and other business is not at the row of the present invention's description.
The implementation of basic point-to-point service is under the orphan stands operational mode, travelling carriage is by initiating more new technological process of position, provide self travelling carriage number and user totem information to the base station, keep all travelling carriage identity travelling carriage numbers and its user ID mapping table in this base station range in the base station; When needs carry out point to point call, the called mobile station number information that the base station reports by travelling carriage, travelling carriage number and its user ID correspondence relationship information table of inquiry storage, obtain called user totem information, and, set up point-to-point call proceeding by in all Serving cells of this base station, initiating the paging of user ID paging mode.Wherein, described travelling carriage number is MSISDN, and described user ID is ground, an IMSI or process certain conversion back identification code, change identification code and IMSI sign indicating number and have one-to-one relationship, and network side adopts identical conversion regime with mobile station side.
Referring to Fig. 1, shown in Figure 2, be example with the point to point call of standing of the orphan based on the GSM digital cluster system, the present invention program is elaborated.
Referring to shown in Figure 1, MSISDN and IMSI mapping table that the present invention preserves at inside of base station, usually, the starting stage that enters lonely station operational mode when the base station need upgrade this mapping table, and its detailed process is as follows:
Step 101, base station detect the Abis interface transmission, and when detecting the transmission chain rupture, the base station enters lonely station operational mode.
Step 102, the base station is broadcast system message on the BCCH channel, and the notice travelling carriage has entered lonely station operational mode, and this system message is in the broadcasting of the enterprising line period of BCCH channel.
Step 103, travelling carriage receive on this BCCH channel show that the base station is in the system message of lonely station operational mode after, travelling carriage enters lonely station operational mode.
Owing to reasons such as location of mobile station variations, the number and the information of travelling carriage often change in the service area that the base station is had jurisdiction over, and therefore need upgrade in time MSISDN and IMSI mapping table below are position updating process:
Step 104, the Mobile Origination position is new technological process more, promptly upgrade business request information and initiate position updating request, in this message, provide IMSI and MSISDN information, and start lonely station operational mode position renewing timer simultaneously to the base station to the base station by complete layer three position.
Step 105, base station are upgraded from complete layer three position of receiving and are taken out IMSI information and MSISDN information the business request information, are kept in MSISDN and the IMSI mapping table.
Step 106, the base station sends the position renewal to travelling carriage and accepts message, and the affirmation position is upgraded successfully, and position updating process finishes.
If travelling carriage still can not receive the position of returning the base station before overtime and upgrades acknowledge message at orphan's operational mode position renewing timer of standing, then postpone a period of time after, initiate position updating process once more, promptly repeated execution of steps 104～106.Because number of mobile stations that the base station is had jurisdiction over is more, situation carrying out may often bumping when the position is upgraded causes the position updating request of some travelling carriages in time to be handled, therefore, here after needing these travelling carriages to postpone a period of time, initiate position updating process once more.And,, produced this time of delay at random by certain algorithm for a period of time that reduces the occurrence probability of mobile station position update request collision, can be provided with to be postponed is not fixed.
In addition, the follow-up travelling carriage that enters in this base station range after the orphan of periodic broadcast stands operational system message on the reception BCCH channel, also need be initiated position updating process, provides IMSI and MSISDN information to the base station.
Above described position updating process be starting stage after travelling carriage enters lonely station operational mode, and the follow-up location renewal process initiated of the overtime back of operational mode position renewing timer, lonely station.In addition, for MSISDN and the IMSI mapping table that makes inside of base station obtains in time and reliably upgrading, can also require travelling carriage periodically to initiate position updating process.
Referring to shown in Figure 2, under the orphan stood operational mode, travelling carriage can be initiated point to point call, and its detailed process is as follows:
Step 201, the Mobile Origination point to point call, promptly after finishing the channel access, travelling carriage sends layer three a point-to-point service request message to the base station, carries called subscriber's Mobile Subscriber International ISDN Number in this message.
Wherein, the channel access procedure is identical with the existing channel access procedure of gsm system here.
Step 202, after layer three point-to-point service request message are received in the base station, inquire about local MSISDN and IMSI mapping table according to the Mobile Subscriber International ISDN Number of called subscriber in the message, if there is called Mobile Subscriber International ISDN Number in the mapping table, then can obtain the IMSI information of this number correspondence, send the call request acknowledge message to the caller travelling carriage that sends a request message; Otherwise, if this Mobile Subscriber International ISDN Number not in MSISDN that store the base station and the IMSI mapping table sends call business request refuse information, process ends then directly for the caller travelling carriage.
Step 203, paging is initiated in the base station, promptly carries the beep-page message of called IMS I information to the travelling carriage broadcasting of all Serving cells of base station, and starts lonely station operational mode page response timer.
Step 204 after travelling carriage is received beep-page message, detects the IMSI that carries in the message, judges whether this IMSI is the IMSI of this travelling carriage, if then travelling carriage is finished channel and inserted the back to base station transmission page response, enters step 205; Otherwise, not at this travelling carriage if travelling carriage detects this beep-page message, then travelling carriage is not done any response.
Wherein, the channel access procedure before the page response of travelling carriage transmission here is identical with the process of existing gsm system regulation.
Step 205, this called mobile station further sends the page response business request information that carries this travelling carriage IMSI to network side.
Step 206, after the page response business request information that called mobile station sends is received in the base station, by this called IMSI information that provides, and the MSISDN and the IMSI mapping table of called MS ISDN information that provides in conjunction with caller and local storage, determine the caller that request and this called foundation calling are connected, be the called MS ISDN of base station current called IMS I correspondence of reverse find in MSISDN and IMSI mapping table, the caller of finding needs to connect according to this called MSISDN again with it; After this, caller and called distribution service channel are given in the base station.
Wherein, at this moment, the calling service channel must adopt identical channelling mode with the called service channel, if caller travelling carriage and called mobile station are the utmost point early assignment rules of prior art the employing of channel access phase, when then caller and called distribution service channel were given in the base station, execution pattern was revised rules.
Step 207, base station are finished the caller up channel to called down channel, and caller down channel continuing to called up channel.
Wherein, be to carry out if the uplink and downlink channel continues at Abis interface, then the processing to Abis interface uplink and downlink channel asymmetry need be finished in the base station, and concrete processing mode relies on the specific implementation regulation with base station manufacturer.
Step 208 behind the complete connection of base station, sends CONNECT message for caller travelling carriage and called mobile station, notifies these two travelling carriages to continue successfully; After caller travelling carriage and called mobile station are received this message, can provide the prompting of audible, indication caller and called subscriber can begin speech.
If after the orphan stands operational mode page response timer expiry, the page response that called mobile station is returned is not still received in the base station, and then the base station sends the call request refuse information for the caller travelling carriage.
Those skilled in the art are not difficult to find out that the present invention should only not be confined to the GSM digital cluster system, can also be equally applicable to as other similar Digital Cellular Systems such as GSM public network, or other analogue.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1, a kind of implementation method of the lonely point to point call of standing is characterized in that, its travelling carriage number of having jurisdiction over travelling carriage in the Serving cell and the mapping table of user ID is set in the base station, and may further comprise the steps:
A) the caller travelling carriage sends the layer three point-to-point service call request message that include the called mobile station number to the base station;
B) after layer three point-to-point service call request message are received in the base station, inquire about the user ID of current called mobile station number correspondence by the mapping table of travelling carriage number and user ID;
C) beep-page message that broadcast packet in the Serving cell contains active user's sign is had jurisdiction at it in the base station;
D) behind the beep-page message that travelling carriage is received, judge whether the user ID in this beep-page message is the user ID of self, if, then travelling carriage sends the page response business request information include self user ID to the base station, enter step e), otherwise travelling carriage is not done any response;
E) after the page response business request information is received in the base station, determine the caller travelling carriage that request and this called mobile station foundation calling are connected according to the user ID that provides in this message, the base station is caller and called mobile station difference distribution service channel, and carry out after channel continues, send the continue notification message of success of travelling carriage to caller and called mobile station respectively.
2, method according to claim 1, it is characterized in that, described step a) takes a step forward and comprises: the base station is detected the Abis interface transmission in real time, judge whether normal, if, then keep the network normal operation mode, otherwise the system message that enters lonely station operational mode is broadcasted in the base station on the BCCH channel.
3, method according to claim 2 is characterized in that, the described system message that enters lonely station operational mode is periodically broadcasted in described base station.
4, method according to claim 1 is characterized in that, this method further comprises the mobile station position update process:
A. travelling carriage sends complete layer three position include self travelling carriage number and user ID to the base station and upgrades business request information;
B. travelling carriage number and the user ID upgraded in the business request information of complete layer three position that will receive, base station is kept in described travelling carriage number and the user ID mapping table;
C. the base station is upgraded to this travelling carriage home position and is accepted message.
5, method according to claim 4 is characterized in that, the described travelling carriage of steps A sends when business request information is upgraded in described holostrome three positions and further comprises: travelling carriage starts lonely station operational mode position renewing timer;
After if lonely station operational mode position renewing timer is overtime, travelling carriage is not received yet that described position that the base station is returned is upgraded and is accepted message, then returns steps A.
According to claim 4 or 5 described methods, it is characterized in that 6, described position updating process is to carry out in the starting stage that travelling carriage enters lonely station operational mode, and/or periodically carries out after entering lonely station operational mode.
7, method according to claim 1, it is characterized in that, the described process of searching current called mobile station number respective user sign of step b) further comprises, judge whether to find, if then return the call request acknowledge message to the caller travelling carriage, enter step c), otherwise, return call request refuse information, process ends to the caller travelling carriage.
8, method according to claim 1 is characterized in that, the described base station of step c) further comprises in the time of the travelling carriage broadcast paging messages: base station initiated lonely station operational mode page response timer;
If behind the operational mode page response timer expiry of lonely station, the base station is not received the page response business request information that described called mobile station is returned yet, then the base station sends the call request refuse information to the caller travelling carriage.
9, method according to claim 1 is characterized in that, the described travelling carriage transmission of step a) layer three a point-to-point service call request message take a step forward and comprise: the caller travelling carriage carries out the channel access procedure;
The described called mobile station of step d) takes a step forward to base station transmission page response business request information and comprises: called mobile station is carried out the channel access procedure.
10, method according to claim 9 is characterized in that, the Traffic Channel that described caller travelling carriage inserts adopts identical channelling mode with the Traffic Channel that called mobile station inserts.
11, method according to claim 1 is characterized in that, the described travelling carriage of step d) sends the page response business request information include self user ID to the base station and takes a step forward and comprise: travelling carriage sends page-response message to the base station.
12, method according to claim 1, it is characterized in that, the user ID that the described base station of step e) provides according to the page response business request information determines that the process of the caller travelling carriage that request and this called mobile station foundation calling connect specifically comprises: the corresponding travelling carriage number of current CSI called subscriber identification is searched in the base station in described travelling carriage number and user ID mapping table, determines the caller travelling carriage that request and this called mobile station foundation calling are connected according to this travelling carriage number.
13, method according to claim 1 is characterized in that, the travelling carriage that the described base station of step e) sends to caller and the called mobile station success notification message that continues is a CONNECT message.
14, method according to claim 1 is characterized in that, further comprises after the step e): after travelling carriage is received described CONNECT message, send the information that can begin to talk to the user.
15, method according to claim 1 is characterized in that, described travelling carriage number is MSISDN, and described user ID is ground, an IMSI or process certain conversion back identification code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379207A CN100384292C (en) | 2004-05-10 | 2004-05-10 | Method for implementing point to point calls for alone station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379207A CN100384292C (en) | 2004-05-10 | 2004-05-10 | Method for implementing point to point calls for alone station |
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| CN1697544A true CN1697544A (en) | 2005-11-16 |
| CN100384292C CN100384292C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100379207A Expired - Fee Related CN100384292C (en) | 2004-05-10 | 2004-05-10 | Method for implementing point to point calls for alone station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010012166A1 (en) * | 2008-07-31 | 2010-02-04 | 华为技术有限公司 | Method, system and device for obtaining correspondence between imsi and number |
| WO2010145538A1 (en) * | 2009-06-16 | 2010-12-23 | 华为技术有限公司 | Method and base station for establishing call connection |
| CN102469421A (en) * | 2010-11-15 | 2012-05-23 | 华为技术有限公司 | Method and terminal for sending IMSI |
| CN104871584A (en) * | 2014-06-24 | 2015-08-26 | 华为技术有限公司 | Access network equipment and communication method |
| CN105992257A (en) * | 2015-01-28 | 2016-10-05 | 中兴通讯股份有限公司 | Public safety communication realization method and device |
| CN110234105A (en) * | 2018-03-06 | 2019-09-13 | 中国移动通信有限公司研究院 | Detect VLR whether the method and device of authentication denial service order |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6567668B1 (en) * | 1997-10-09 | 2003-05-20 | Ericsson Inc. | Locator barring for satellite-based networks |
| US6564049B1 (en) * | 1999-05-10 | 2003-05-13 | Ericsson Inc. | Methods and systems for providing group calls with reduced setup times |
| KR20030025081A (en) * | 2001-09-19 | 2003-03-28 | 삼성전자주식회사 | Method for transmitting/receiving picture caller identification in mobile communication system |
| CN100403807C (en) * | 2002-07-10 | 2008-07-16 | 协同智迅通信技术（深圳）有限公司 | Communication method for increasing paging receiving unit in terminal and system thereof |
| CN1265573C (en) * | 2002-08-19 | 2006-07-19 | 华为技术有限公司 | Method for implementing one machine to several numbers in code devision multiple address system |
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2004
- 2004-05-10 CN CNB2004100379207A patent/CN100384292C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010012166A1 (en) * | 2008-07-31 | 2010-02-04 | 华为技术有限公司 | Method, system and device for obtaining correspondence between imsi and number |
| WO2010145538A1 (en) * | 2009-06-16 | 2010-12-23 | 华为技术有限公司 | Method and base station for establishing call connection |
| CN102469421A (en) * | 2010-11-15 | 2012-05-23 | 华为技术有限公司 | Method and terminal for sending IMSI |
| WO2012065492A1 (en) * | 2010-11-15 | 2012-05-24 | 华为技术有限公司 | Method for sending imsi and terminal |
| CN104871584A (en) * | 2014-06-24 | 2015-08-26 | 华为技术有限公司 | Access network equipment and communication method |
| WO2015196370A1 (en) * | 2014-06-24 | 2015-12-30 | 华为技术有限公司 | Access network device and communication method |
| US9900862B2 (en) | 2014-06-24 | 2018-02-20 | Huawei Technologies Co., Ltd | Access network device and communication method |
| CN104871584B (en) * | 2014-06-24 | 2018-07-13 | 华为技术有限公司 | A kind of access network equipment and communication means |
| CN105992257A (en) * | 2015-01-28 | 2016-10-05 | 中兴通讯股份有限公司 | Public safety communication realization method and device |
| CN105992257B (en) * | 2015-01-28 | 2021-01-22 | 中兴通讯股份有限公司 | Public safety communication implementation method and device |
| CN110234105A (en) * | 2018-03-06 | 2019-09-13 | 中国移动通信有限公司研究院 | Detect VLR whether the method and device of authentication denial service order |
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| Publication number | Publication date |
|---|---|
| CN100384292C (en) | 2008-04-23 |
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