CN107529158A - A kind of method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code - Google Patents

A kind of method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code Download PDF

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Publication number
CN107529158A
CN107529158A CN201710575867.3A CN201710575867A CN107529158A CN 107529158 A CN107529158 A CN 107529158A CN 201710575867 A CN201710575867 A CN 201710575867A CN 107529158 A CN107529158 A CN 107529158A
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CN
China
Prior art keywords
cell
lte terminal
tmsi
rnti
lte
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CN201710575867.3A
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Chinese (zh)
Inventor
徐荣华
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Guangzhou Huiruisitong Information Technology Co Ltd
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Guangzhou Huiruisitong Information Technology Co Ltd
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Priority to CN201710575867.3A priority Critical patent/CN107529158A/en
Publication of CN107529158A publication Critical patent/CN107529158A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code, including step：For cell searching with synchronous, decoding obtains the cell system message where the LTE terminal；Page LTE target terminals；All beep-page messages in cell are decoded, and extract and count M TMSI, determine the M TMSI of LTE terminal；Decode descending MSG2 message, extraction RA RNTI and TC RNTI；Descending MSG4 message is decoded, M TMSI are so that it is determined that the cell-radio network identification code of LTE terminal for matching.The present invention is on the premise of the interaction of uncertain base station and terminal, is obtained by a series of data decoded in eating dishes without rice or wine and statistical analysis, this is a kind of uncertain acquisition modes.

Description

A kind of method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code
Technical field
The invention belongs to wireless communication technique field, more particularly to a kind of LTE terminal cell-radio network that obtains is marked temporarily Know the method for code.
Background technology
International mobile subscriber identity (IMSI：International Mobile Subscriber Identification Number) it is the mark for distinguishing mobile subscriber, it is stored in SIM card (Subscriber Identity Module Card) in, the effective information available for difference mobile subscriber.In the world by unique identification one mobile subscriber point The number matched somebody with somebody.In LTE (Long Term Evolution, Long Term Evolution) network, IMSI typically will not directly eat dishes without rice or wine Middle transmission, because IMSI is also relevant with authentication ciphering except the identity that can identify mobile subscriber, if exposed to middle transmission of eating dishes without rice or wine Obviously the safety of mobile subscriber can be caused a hidden trouble, in order to reduce the transmission of IMSI in the lte networks, defined in LTE standard A variety of casual network identification codes for distinguishing mobile subscribers substitute IMSI.
Mobile subscriber's temporary mark (M-TMSI：MME-Temporary Mobile Subscriber Identity), Temporary mark mobile subscriber in network, it is possible to reduce IMSI parameters are exposed in network transmission.The beep-page message issued in base station In can typically carry mobile subscriber M-TMSI.Random access radio network temporary mark (RA-RNTI：Cell-Radio Network Temporary Identifier), the user for random access procedure identifies, while for scrambling descending MSG2 (Message2, message 2) PDCCH corresponding to the stage (Physical Downlink Control Channel, physical down control Channel processed) channel.Temporary Radio Network temporary mark (TC-RNTI：Cell-Radio Network Temporary Identifier), it is in the random access procedure of competitive mode, carries in MSG2.Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C- RNTI：Cell-Radio Network Temporary Identifier) it is to be used after mobile subscriber establishes connection with base station Temporary mark, it is used for one mobile subscriber of unique mark in a cell.When base station issues MSG4 (Message4, message 4) After solving multiple mobile subscriber's competitiveness random access procedures, the TC-RNTI carried in MSG2 before is automatically changeb to C- RNTI。
In LTE wireless networks, want accurately to extract mobile subscriber in PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) data in physical channel, the PDCCH of mobile subscriber must be just decoded first (Physical Downlink Control Channel, Physical Downlink Control Channel) physical channel is to obtain DCI (Downlink Control Information, Downlink Control Information) information, the PDCCH for decoding mobile subscriber need to use shifting The C-RNTI at family is employed to descramble.
, it is necessary to know base station to LTE during being extracted to data of the LTE terminal in PDSCH shared channels The resource location information of terminal distribution, this just needs the descending PDCCH physical channels of decoding base station to obtain, and decodes PDCCH The Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code of LTE terminal is needed to descramble, therefore can the cell that determine and obtain LTE terminal wireless Network Temporary Identifier code just turns into the key solved the problems, such as.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art and deficiency, there is provided it is wireless that one kind obtains LTE terminal cell The method of Network Temporary Identifier code, on the premise of uncertain base station with the interaction of the terminal, by a series of solution Code eat dishes without rice or wine in data and statistical analysis obtain LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code.
The purpose of the present invention is realized by following technical scheme：One kind obtains LTE terminal cell-radio network and marked temporarily Know the method for code, comprise the following steps：
With synchronous, decoding obtains the cell system message where the LTE terminal for S1, cell searching；
S2, paging LTE target terminals；
All beep-page messages in S3, decoding cell, and M-TMSI is extracted and counts, determine the M-TMSI of LTE terminal；
S4, the descending MSG2 message of decoding, extract RA-RNTI and TC-RNTI；
S5, the descending MSG4 message of decoding, M-TMSI is so that it is determined that the cell-radio network identification code of LTE terminal for matching.
Preferably, step S1 is specially：Base station down data are gathered in the cell of target LTE terminal, first to descending Data synchronize processing completion and the synchronizing process of LTE terminal cell；Downlink data is further decoded, decoding PBCH channels obtain The MIB of LTE terminal cell is taken, PDCCH channels is decoded and PDSCH channels obtains the SIB of LTE terminal cell, complete to LTE terminal Cell search process.
Preferably, LTE terminal is periodically called in step S2.
Specifically, by periodically sending short message or wechat to LTE terminal so that base station to LTE terminal periodically Initiate paging flow.
Preferably, step S3 is specially：Start while step S2 the lower line number of further decoding LTE terminal cell According to, including decoding PDCCH channels and PDSCH channels obtain all beep-page messages in LTE terminal cell, and from the paging of acquisition Corresponding M-TMSI is extracted inside message, while preserves and count the number that the M-TMSI extracted occurs, as some M- When TMSI reaches prespecified number, you can judge M-TMSIs of the M-TMSI for LTE terminal, so far the step is completed；It is no Then repeat step S3 is until completing.
Further, cannot be less than 5 times for the prespecified numbers of M-TMSI.
Preferably, step S4 is specially：After completing step S3 and the M-TMSI of LTE terminal be determined, further decoding The downlink data of LTE terminal cell, PDCCH channels are first decoded, and descrambled using RA-RNTI values as defined in 3GPP agreements The decoded result of PDCCH channels, to obtain DCI information, PDSCH channels are then decoded according to the DCI information of acquisition, so as to parse Go out MSG2 message, finally extract TC-RNTI in the MSG2 message parsed, so far complete step S4.
Preferably, step S5 is specially：After step S4 is completed, continue to decode the downlink data of LTE terminal cell, it is first PDCCH channels are first decoded, the TC-RNTI extracted using step S4 descrambles the decoded result of PDCCH channels to obtain DCI information, Then PDSCH channels are decoded according to the DCI information of acquisition, so as to parse MSG4 message, further disappeared in the MSG4 parsed M-TSMI is extracted in breath, is finally carried out using the M-TMSI of the LTE terminal determined in the M-TMSI extracted and step S3 Compare, if the same can determine that the TC-RNTI obtained in step S4 is the C-RNTI of the LTE terminal, so far processing stream Journey is completed；Repeat step S4 and step S5 is until handling process completion if differing.
The present invention compared with prior art, has the following advantages that and beneficial effect：
The present invention, according to cell system message, is sought by search and cell where synchronous LTE terminal to all in cell Exhale message to be decoded, extract and count the M-TMSI of LTE terminal, further decode MSG2 and MSG4 all in cell, The final C-RNTI for obtaining LTE terminal.The method of the present invention obtains the small of base station distribution with terminal in general GSM The difference of area's wireless network identification code is：In general GSM, the C-RNTI of terminal is to establish to connect in terminal and base station By base station by signaled terminal during connecing, this is a kind of acquisition modes of determination.And the present invention is then unknown On the premise of base station and terminal establish connection, the methods of data and statistical analysis in being eated dishes without rice or wine by blind solutions a series of obtains end The C-RNTI's at end, this is a kind of acquisition modes under conditions of known conditions is few, is more suitable for practical application.
Brief description of the drawings
Fig. 1 is the process chart of embodiment method.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited In this.
Embodiment
To obtain LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code, the present embodiment method is as shown in Fig. 1 fundamental block diagrams, bag Include 5 steps：
1st, for cell searching with synchronous, decoding obtains the cell system message where the LTE terminal；
2nd, LTE target terminals are paged；
3rd, all beep-page messages in cell are decoded, and extract and count M-TMSI, determine the M-TMSI of LTE terminal；
4th, descending MSG2 message is decoded, extracts RA-RNTI and TC-RNTI；
5th, descending MSG4 message is decoded, M-TMSI is so that it is determined that the cell-radio network identification code of LTE terminal for matching.
Specifically：
Step 1：Base station down data are gathered in the cell of the target LTE terminal, downlink data are carried out first same The synchronizing process with LTE terminal cell is completed in step processing；Downlink data is further decoded, decoding PBCH channels obtain LTE terminal The MIB (Master Information Block, host system message block) of cell, decodes PDCCH channels and PDSCH channels obtain The SIB (system information block) of the LTE terminal cell, completes the cell search process to LTE terminal；
Step 2：LTE terminal is periodically called, can be by periodically sending short message or micro- to LTE terminal Letter so that periodically initiate LTE terminal to page flow in base station；
Step 3：Start while step 2 downlink data of further decoding LTE terminal cell, including decoding PDCCH channels and PDSCH channels obtain all beep-page messages in LTE terminal cell, and are carried inside the beep-page message of acquisition M-TMSI corresponding to taking-up, while the number that the M-TMSI extracted occurs is preserved and counts, when some M-TMSI reaches pre- As defined in elder generation during number, you can judge M-TMSIs of the M-TMSI for LTE terminal, so far the step is completed；Otherwise repeat step 3 Until completing.Prespecified number cannot be less than 5 times during this, the too small easily statistics error of number, and number is bigger correct Rate is higher；
Step 4：After completing step 3 and the M-TMSI of LTE terminal is determined, further decode under LTE terminal cell Row data, PDCCH channels are first decoded, and the decoding knot of PDCCH channels is descrambled using RA-RNTI values as defined in 3GPP agreements Fruit, to obtain DCI information, PDSCH channels are then decoded according to the DCI information of acquisition, so as to parse MSG2 message, finally existed TC-RNTI is extracted in the MSG2 message parsed, so far completes step 4；
Step 5：After completing step 4, continue the downlink data of decoding LTE terminal cell, decode PDCCH letters first Road, the decoded result of the TC-RNTI descrambling PDCCH channels extracted using step 4 is to obtain DCI information, then according to acquisition DCI information decodes PDSCH channels, so as to parse MSG4 message, further extracts M- in the MSG4 message parsed TSMI, finally using the M-TMSI extracted compared with the M-TMSI of the LTE terminal determined in step 3, if identical Then can determine that the TC-RNTI obtained in step 4 is the C-RNTI of the LTE terminal, and so far handling process is completed；If not phase Same then repeat step 4 and step 5 are until handling process completion.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (8)

  1. A kind of 1. method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code, it is characterised in that comprise the following steps：
    With synchronous, decoding obtains the cell system message where the LTE terminal for S1, cell searching；
    S2, paging LTE target terminals；
    All beep-page messages in S3, decoding cell, and M-TMSI is extracted and counts, determine the M-TMSI of LTE terminal；
    S4, the descending MSG2 message of decoding, extract RA-RNTI and TC-RNTI；
    S5, the descending MSG4 message of decoding, M-TMSI is so that it is determined that the cell-radio network identification code of LTE terminal for matching.
  2. 2. according to the method for claim 1, it is characterised in that step S1 is specially：Adopted in the cell of target LTE terminal Collect base station down data, synchronize processing completion and the synchronizing process of LTE terminal cell to downlink data first；Further solution Code downlink data, decoding PBCH channels obtain the MIB of LTE terminal cell, decode PDCCH channels and PDSCH channels acquisition LTE is whole The SIB of cell is held, completes the cell search process to LTE terminal.
  3. 3. according to the method for claim 1, it is characterised in that LTE terminal is periodically called in step S2.
  4. 4. according to the method for claim 3, it is characterised in that by periodically sending short message or wechat to LTE terminal, So that base station periodically initiates LTE terminal to page flow.
  5. 5. according to the method for claim 1, it is characterised in that step S3 is specially：Carry out step S2 while start into One step decodes the downlink data of LTE terminal cell, including decoding PDCCH channels and PDSCH channels are obtained in LTE terminal cell All beep-page messages, and corresponding M-TMSI is extracted inside the beep-page message of acquisition, while preserve and count what is extracted The number that M-TMSI occurs, when some M-TMSI reaches prespecified number, you can judge the M-TMSI for LTE terminal M-TMSI, so far the step complete；Otherwise repeat step S3 is until completing.
  6. 6. according to the method for claim 5, it is characterised in that cannot be less than 5 times for the prespecified numbers of M-TMSI.
  7. 7. according to the method for claim 1, it is characterised in that step S4 is specially：LTE ends are determined completing step S3 After the M-TMSI at end, the downlink data of LTE terminal cell is further decoded, first decodes PDCCH channels, and use 3GPP agreements Defined RA-RNTI values descramble the decoded result of PDCCH channels, to obtain DCI information, are then believed according to the DCI of acquisition Breath decoding PDSCH channels, so as to parse MSG2 message, finally extract TC-RNTI in the MSG2 message parsed.
  8. 8. according to the method for claim 1, it is characterised in that step S5 is specially：After step S4 is completed, continue to solve The downlink data of code LTE terminal cell, decodes PDCCH channels first, the TC-RNTI descrambling PDCCH letters extracted using step S4 Then the decoded result in road decodes PDSCH channels according to the DCI information of acquisition, disappeared so as to parse MSG4 to obtain DCI information Breath, further extracts M-TSMI in the MSG4 message parsed, finally using in the M-TMSI extracted and step S3 The M-TMSI of the LTE terminal of determination is compared, and it is described for if the same can determine that the TC-RNTI obtained in step S4 The C-RNTI of LTE terminal, so far handling process completion；If differing repeat step S4 and step S5 until handling process it is complete Into.
CN201710575867.3A 2017-07-14 2017-07-14 A kind of method for obtaining LTE terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI code Pending CN107529158A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019148404A1 (en) * 2018-01-31 2019-08-08 Oppo广东移动通信有限公司 Method for paging, terminal equipment, and network equipment
WO2019214498A1 (en) * 2018-05-10 2019-11-14 维沃移动通信有限公司 Dci transmission method, terminal and base station
CN111031556A (en) * 2019-11-29 2020-04-17 武汉虹信通信技术有限责任公司 Method and device for acquiring downlink resolution of base station of long term evolution system
CN111263436A (en) * 2020-01-17 2020-06-09 武汉虹旭信息技术有限责任公司 System and method for calculating distance between user terminal and base station in LTE system
CN111263378A (en) * 2020-01-17 2020-06-09 广州飞曙电子科技有限公司 LTE network air interface analysis method, device and storage medium
CN115426714A (en) * 2022-10-21 2022-12-02 杰创智能科技股份有限公司 Passive positioning method and device, electronic equipment and storage medium

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019148404A1 (en) * 2018-01-31 2019-08-08 Oppo广东移动通信有限公司 Method for paging, terminal equipment, and network equipment
US11343796B2 (en) 2018-01-31 2022-05-24 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for paging, terminal equipment, and network equipment
WO2019214498A1 (en) * 2018-05-10 2019-11-14 维沃移动通信有限公司 Dci transmission method, terminal and base station
US11606178B2 (en) 2018-05-10 2023-03-14 Vivo Mobile Communication Co., Ltd. DCI transmission method, terminal, and base station
US11876749B2 (en) 2018-05-10 2024-01-16 Vivo Mobile Communication Co., Ltd. DCI transmission method, terminal, and base station
CN111031556A (en) * 2019-11-29 2020-04-17 武汉虹信通信技术有限责任公司 Method and device for acquiring downlink resolution of base station of long term evolution system
CN111263436A (en) * 2020-01-17 2020-06-09 武汉虹旭信息技术有限责任公司 System and method for calculating distance between user terminal and base station in LTE system
CN111263378A (en) * 2020-01-17 2020-06-09 广州飞曙电子科技有限公司 LTE network air interface analysis method, device and storage medium
CN111263436B (en) * 2020-01-17 2021-09-24 武汉虹旭信息技术有限责任公司 System and method for calculating distance between user terminal and base station in LTE system
CN115426714A (en) * 2022-10-21 2022-12-02 杰创智能科技股份有限公司 Passive positioning method and device, electronic equipment and storage medium

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Application publication date: 20171229