CN109451546A - A method of the acquisition terminal IMSI based on S-TMSI paging - Google Patents
A method of the acquisition terminal IMSI based on S-TMSI paging Download PDFInfo
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- CN109451546A CN109451546A CN201811521538.1A CN201811521538A CN109451546A CN 109451546 A CN109451546 A CN 109451546A CN 201811521538 A CN201811521538 A CN 201811521538A CN 109451546 A CN109451546 A CN 109451546A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of method that the present invention proposes acquisition terminal IMSI based on S-TMSI paging, technical characterstic of this method for switching and TAU process in LTE system, for in connected state and because of the mobile UE to switch in position, if there is connected state TAU after the completion of switching, the then S-TMSI information of the available UE of target BS, after the completion of connected state TAU, target BS actively discharges UE, and it initiates to register again in Target cell to wake up UE by issuing S-TMSI paging, to obtain the IMSI number of UE, this method can efficiently solve the problem of target BS can not grab the IMSI number of UE in handoff scenario, and UE is not necessarily to any operation, it is convenient and efficient, whole process time-consuming is very short, field data show is no more than 1 second, to U The ongoing service impact of E is little, and the influence to user experience can be ignored completely.
Description
Technical field
The present invention relates to LTE mobile communication technology field, especially a kind of acquisition terminal IMSI based on S-TMSI paging
Method.
Background technique
Currently, the small base station LTE is in Internet of Things with the fast development of small station technology to reach its maturity with Internet of Things industry
The application in field is also more and more extensive, and typical case scene includes mobile-phone payment, intelligent entrance guard, fence etc..At these
In application scenarios, require to obtain some relevant UE information, such as IMSI number as the management system of core using small base station.UE
From macro station enter above-mentioned small base station during, the difference of the working condition according to locating for UE, may triggering cell gravity treatment or
Person's switching.Cell reselection process refers to: UE monitors the signal quality of adjacent area and current area, and selection signal at the idling mode
A top-quality cell provides service signal, sets in advance when the signal quality and level of adjacent area meet S criterion and meet
When the gravity treatment decision rule set, terminal (UE) will access this cell and be resident.
And switch and refer to UE in connected state when different minizone is mobile, by a series of signaling procedures to complete
At the process of UE context switched and updated.
When cell reselection occurs, small base station can directly acquire the IMSI number of UE, but when switching, small base
The IMSI number of UE can not be obtained by standing.
Summary of the invention
Goal of the invention: to solve the above-mentioned problems, the present invention is directed to the technical characterstic of switching and TAU process in LTE system,
A kind of method for proposing acquisition terminal IMSI based on S-TMSI paging switches in connected state and because of position movement
UE, if there is connected state TAU after the completion of switching, the S-TMSI information of the available UE of target BS, to connected state
After the completion of TAU, target BS actively discharges UE, and is initiated in Target cell again by issuing S-TMSI paging to wake up UE
Registration, to obtain the IMSI number of UE.
Technical solution: in order to realize the above technical effect, technical solution proposed by the present invention are as follows:
A method of the acquisition terminal IMSI based on S-TMSI paging, this method include the steps that successively executing (1) extremely
(7):
(1) to, in connected state and because of the mobile UE to switch in position, in handover execution stage, UE is sent out in LTE system
It send RRC connection reconfiguration to set and completes message to target BS, completed to target BS confirmation handoff procedure；
(2) after the completion of switching, if Target cell is different with the TAC of source cell, UE initiates the connection state TAU, wait connect
Step (3) are transferred to after the completion of state TAU；Otherwise, connected state TAU does not occur, and this method terminates；
The process of the connected state TAU are as follows: UE sends TAU request message to target BS, and target BS disappears from TAU request
The S-TMSI information of UE is obtained in breath and is saved, and then forwards TAU request message to core net；Target BS inspection receives
The TAU received message replied by core net, if the GUTI redistributed comprising core net to UE in TAU received message, mesh
Mark base station obtains new S-TMSI information from TAU received message and saves update, then TAU is forwarded to accept message to UE, UE
It replys TAU and completes message to target BS；If not including core net in the TAU received message that core net is replied to divide again to UE
The GUTI matched, then target BS directly forwards TAU to accept message to UE, and UE does not reply any message；
(3) target BS sends UE context release request message to core net, and core net replys UE context release life
Enable message to target BS, target BS, which discharges, replys UE context Release complete to core net after UE context；
(4) the RRC connection of target BS release UE, issues RRC connection release message to UE；
(5) target BS wakes up UE using the S-TMSI information distributing paging of the UE previously obtained；
(6) UE responds the paging that target BS issues, and initiates registration again in Target cell, and establish RRC connection；
(7) after the completion of RRC connection is established, target BS copies core net forged identity checking request message, and by identity
Checking request message is handed down to UE, and request UE reports IMSI number, and UE replys authentication response message to target BS, identity
IMSI number is carried in authentication response information, target BS saves IMSI number after receiving.
Further, the process for establishing RRC connection are as follows:
UE sends RRC connection request message to target BS, and target BS replys RRC connection and establishes message to UE, UE times
Multiple RRC connection setup complete message is to target BS.
The utility model has the advantages that compared with prior art, present invention has the advantage that
The scene that the present invention switches in LTE system just for UE and has connected state TAU to occur after the completion of switching,
Target BS wakes up UE again in Target cell by actively discharging UE after the completion of connected state TAU and initiating S-TMSI paging
Middle registration is to obtain the IMSI number of UE, this method, which can efficiently solve the target BS in handoff scenario, can not grab UE
IMSI number the problem of, and UE be not necessarily to any operation, convenient and efficient, whole process time-consuming is very short, and field data show does not surpass
1 second is spent, little to the ongoing service impact of UE, the influence to user experience can be ignored completely.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is the system architecture diagram in embodiment.
Specific embodiment
The present invention proposes a kind of obtaining based on S-TMSI paging for the technical characterstic of switching and TAU process in LTE system
The method for taking terminal IMSI, this method are directed in connected state and because of the mobile UE to switch in position, if after the completion of switching
There is connected state TAU, then the S-TMSI information of the available UE of target BS, after the completion of connected state TAU, target BS master
Dynamic release UE, and initiate to register again in Target cell to wake up UE by issuing S-TMSI paging, to obtain UE's
IMSI number.The present invention will be further explained with reference to the accompanying drawing.
It is illustrated in figure 2 the system architecture diagram that embodiment provides, cell 1 and cell 2 are two adjacent LTE cells, UE
Most start to reside in cell 1, be in connected state, rear UE is moved near cell 2, switches.In the present embodiment, cell
1 is source cell, and base station 1 is source base station, and cell 2 is Target cell, and base station 2 is target BS.If Target cell and source cell
TAC is different, and UE will initiate the connection state TAU, and otherwise, connected state TAU will not occur.Herein, it will be assumed that cell 1 and cell 2
TAC it is different.
It as shown is overall flow figure of the invention, under the premise of UE initiates the connection state TAU, whole flow process is divided into 14
Step:
1. UE sends RRC connection reconfiguration and sets completion message to target BS in handover execution stage, confirm to target BS
Handoff procedure is completed；
2. UE initiates the connection state TAU since TAC changes, UE sends TAU request message to target BS, target base
It stands and obtains the S-TMSI information of UE from TAU request message and save, then forward TAU request message to core net；
3. the TAU received message replied by core net that target BS inspection receives, if being connect in the TAU that core net is replied
By the GUTI redistributed not comprising core net to UE in message, then target BS directly forwards TAU to accept message to UE, and UE is not
Reply any message；If the GUTI redistributed comprising core net to UE in TAU received message, target BS connect from TAU
By obtaining new S-TMSI information in message and saving update, then TAU is forwarded to accept message to UE；
4. UE replys TAU and completes message to target BS, the connected state TAU process of UE and the S-TMSI information for obtaining UE
Process terminates；
5. target BS sends UE context release request message to core net；
6. core net replys UE context release command message to target BS；
7. replying UE context Release complete to core net after target BS release UE context；
8. target BS issues RRC connection release message to UE, the RRC Connection Release to this UE is completed；
9. target BS wakes up UE using the S-TMSI information distributing paging of the UE previously obtained, arrive under this target BS
The process of hair S-TMSI paging terminates；
10. the S-TMSI paging that UE response target BS issues, initiates registration again in Target cell, UE sends RRC and connects
Request message is connect to target BS；
Target BS replys RRC connection to UE and establishes message；
UE replys RRC connection setup complete message to target BS；
Target BS copies core net forged identity checking request message, and authentication request message is handed down to
UE, request UE report IMSI number；
UE replys authentication response message to target BS, carries IMSI number, mesh in authentication response message
Mark base station saves IMSI number after receiving, and the IMSI number for obtaining UE to this target BS is completed.
In above-mentioned steps, 1. indicate that handoff procedure is completed；2.~be 4. the connected state TAU that UE may will do it mistake
Journey；5.~be 7. target BS release UE S1 connection process；8. being the process of the RRC connection of target BS release UE；⑨
It is the process that target BS issues S-TMSI paging；10.~It is that UE response paging is initiated to register and build again in Target cell
The process of vertical RRC connection；It is the process for the IMSI number that target BS obtains UE.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the professional skill of this field
For art personnel, the present invention can there are many variations.All any modifications made in the spirit and principles in the present invention are equally replaced
It changes and improves, should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of method of the acquisition terminal IMSI based on S-TMSI paging, which is characterized in that include the steps that successively executing (1)
To (7):
(1) to, in connected state and because of the mobile UE to switch in position, in handover execution stage, UE sends RRC in LTE system
Connection reconfiguration, which is set, completes message to target BS, completes to target BS confirmation handoff procedure；
(2) after the completion of switching, if Target cell is different with the TAC of source cell, UE initiates the connection state TAU, to connected state TAU
It is transferred to step (3) after the completion；Otherwise, connected state TAU does not occur, and this method terminates；
The process of the connected state TAU are as follows: UE sends TAU request message to target BS, and target BS is from TAU request message
It obtains the S-TMSI information of UE and saves, then forward TAU request message to core net；Target BS inspection receive by core
The TAU received message that heart net is replied, if the GUTI redistributed comprising core net to UE in TAU received message, target base
It stands and obtains new S-TMSI information from TAU received message and save update, TAU is then forwarded to accept message to UE, UE is replied
TAU completes message to target BS；If not including what core net was redistributed to UE in the TAU received message that core net is replied
GUTI, then target BS directly forwards TAU to accept message to UE, and UE does not reply any message；
(3) target BS sends UE context release request message to core net, and core net replys the release command of UE context and disappears
It ceases to target BS, target BS, which discharges, replys UE context Release complete to core net after UE context；
(4) the RRC connection of target BS release UE, issues RRC connection release message to UE；
(5) target BS wakes up UE using the S-TMSI information distributing paging of the UE previously obtained；
(6) UE responds the paging that target BS issues, and initiates registration again in Target cell, and establish RRC connection；
(7) after the completion of RRC connection is established, target BS copies core net forged identity checking request message, and by authentication
Request message is handed down to UE, and request UE reports IMSI number, and UE replys authentication response message to target BS, authentication
IMSI number is carried in response message, target BS saves IMSI number after receiving.
2. the method for acquisition terminal IMSI based on S-TMSI paging according to claim 1 a kind of, which is characterized in that institute
State the process for establishing RRC connection are as follows:
UE sends RRC connection request message to target BS, and target BS replys RRC connection and establishes message to UE, UE reply RRC
Connection setup complete message is to target BS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811521538.1A CN109451546A (en) | 2018-12-12 | 2018-12-12 | A method of the acquisition terminal IMSI based on S-TMSI paging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811521538.1A CN109451546A (en) | 2018-12-12 | 2018-12-12 | A method of the acquisition terminal IMSI based on S-TMSI paging |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056508A1 (en) * | 2019-09-29 | 2021-04-01 | Nokia Shanghai Bell Co., Ltd. | Methods and apparatuses for location area update |
| WO2022027381A1 (en) * | 2020-08-05 | 2022-02-10 | 华为技术有限公司 | Communication method and related device |
| CN115190589A (en) * | 2022-07-12 | 2022-10-14 | 深圳市佳贤通信设备有限公司 | Paging-based method for terminal to continuously reside in base station, terminal equipment and base station |
| CN117320152A (en) * | 2023-11-29 | 2023-12-29 | 深圳市佳贤通信科技股份有限公司 | Paging device and method between 5G stations |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056508A1 (en) * | 2019-09-29 | 2021-04-01 | Nokia Shanghai Bell Co., Ltd. | Methods and apparatuses for location area update |
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| CN115190589A (en) * | 2022-07-12 | 2022-10-14 | 深圳市佳贤通信设备有限公司 | Paging-based method for terminal to continuously reside in base station, terminal equipment and base station |
| CN117320152A (en) * | 2023-11-29 | 2023-12-29 | 深圳市佳贤通信科技股份有限公司 | Paging device and method between 5G stations |
| CN117320152B (en) * | 2023-11-29 | 2024-03-19 | 深圳市佳贤通信科技股份有限公司 | Paging device and method between 5G stations |
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