CN114040430A - Method for distinguishing access equipment in wireless network - Google Patents
Method for distinguishing access equipment in wireless network Download PDFInfo
- Publication number
- CN114040430A CN114040430A CN202110904466.4A CN202110904466A CN114040430A CN 114040430 A CN114040430 A CN 114040430A CN 202110904466 A CN202110904466 A CN 202110904466A CN 114040430 A CN114040430 A CN 114040430A
- Authority
- CN
- China
- Prior art keywords
- distance threshold
- threshold value
- distance
- repeater
- mobile terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the technical field of communication, in particular to a method for distinguishing access equipment in a wireless network, which sets at least one distance threshold value in advance according to the direct coverage distance range of a service cell and also comprises the following steps: calculating the transmission distance of the signal sent by the mobile terminal according to the transmission delay in the user call record; and calling a corresponding distance threshold value from at least one distance threshold value according to the type of the hanging-down equipment, and comparing the transmission distance with the corresponding distance threshold value to judge the equipment accessed by the current call of the mobile terminal. The invention has the beneficial effects that: based on basic data and service data of an operator, calculating whether a mobile terminal is accessed through a service cell or an access device of the service cell by utilizing transmission delay of electromagnetic waves in repeater equipment of different types through a threshold classification judgment method; meanwhile, the invention keeps low cost of development and deployment application without adding any special auxiliary equipment.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for distinguishing access devices in a wireless network.
Background
With the rapid development of the communication technology field, the use of mobile terminals has become widespread. In order to meet the complex and diverse access scenarios of the mobile terminal, a large number of devices such as drop-off repeaters often exist in the mobile network of the telecom operator, macro base stations of the devices such as the drop-off repeaters are also called donor base stations, and cells of the devices such as the drop-off repeaters are also called donor cells. According to the regulations of mobile specifications, the down-hanging devices such as repeaters and the like do not have independent network identifications in a mobile network, and the down-hanging devices only serve as a signal amplifier to use the network identification of a donor cell, and mainly comprise: cell identification (e.g., cell ID), sector number (e.g., SEC), physical identifier of the cell (e.g., PN, PCI), etc. This results in data across the existing network being unable to directly distinguish whether a call for the mobile terminal is accessed through the donor cell or through a drop device (e.g., repeater) of the donor cell.
In the prior art, in some working scenarios such as network optimization, network operation, and market development, a telecom operator needs to distinguish whether a mobile terminal is accessed through a donor cell or through an off-hook device (such as a repeater). These scenarios are for example location positioning of mobile terminals, market front end statistics of how many users are attracted to a certain commercial activity, etc. Taking mobile terminal positioning as an example for illustration, in the works of network optimization and market development of telecommunication, the popular mobile phone positioning method is to calculate the mobile phone position by using the cell available multipath reported by the user call detail record. For the cell of the drop-off repeater, the available multipath of the cell reported by the call detail record can not distinguish whether the calling mobile terminal is accessed through the repeater or the donor cell. The distance between the repeater and the donor cell is basically from dozens of meters to dozens of kilometers, which causes the positioning result of the mobile terminal to additionally cause errors from dozens of meters to dozens of kilometers, and the errors often cannot meet the requirement of work, so that it is necessary to distinguish the access of call signals through the donor cell or the access of equipment placed below the donor cell in the wireless network.
Disclosure of Invention
In view of the above problems in the prior art, a method for distinguishing access devices in a wireless network is provided.
The specific technical scheme is as follows:
the invention includes a method for distinguishing access equipment in a wireless network, which is used for distinguishing the current access equipment in the wireless network as a service cell or a drop-off device of the service cell, and at least one distance threshold value is set in advance according to the direct coverage distance range of the service cell, and the method also includes:
acquiring a user call record of a mobile terminal, and acquiring the service cell of the call from the user call record;
calculating the transmission distance of the signal sent by the mobile terminal according to the transmission delay in the user call record;
inquiring basic data corresponding to the service cell of the call, inquiring whether the service cell has the hanging-down equipment or not according to the basic data, and continuously inquiring the type of the hanging-down equipment when the service cell is inquired to have the hanging-down equipment;
calling the corresponding distance threshold value from the at least one distance threshold value according to the type of the downlink device, and comparing the transmission distance with the corresponding distance threshold value:
if the transmission distance is greater than or equal to the distance threshold value, the call of the mobile terminal is accessed by the hanging-down device;
and if the transmission distance is smaller than the distance threshold value, the call of the mobile terminal is directly accessed by the serving cell.
Optionally, the at least one distance threshold is greater than a maximum coverage distance in a direct coverage distance range of the serving cell.
Optionally, the basic data includes base station data and/or outdoor repeater data and/or indoor coverage site data.
Optionally, the base station data includes a base station identifier and/or a base station type and/or a base station longitude and latitude and/or a physical identifier of the serving cell.
Optionally, the outdoor repeater data includes an outdoor repeater identification and/or an outdoor repeater type and/or a latitude and longitude of a donor base station and/or a donor sector of the outdoor repeater and/or the outdoor repeater.
Optionally, the indoor coverage site data includes an identification of the indoor coverage site and/or a type of the indoor coverage site and/or a longitude and latitude of the indoor coverage site and/or an indoor distribution coverage area.
Optionally, the main field of the user call record includes a mobile terminal identifier and/or a timestamp of a network event and/or physical identifiers of a serving network element and a non-serving network element and/or a serving cell and a non-serving cell and/or a network event and/or a transmission delay of signals of the serving cell and the non-serving cell to the mobile terminal.
Optionally, the at least one distance threshold includes a first distance threshold and a second distance threshold;
when the type of the hanging-down equipment is a portable repeater or a radio frequency repeater, comparing the transmission distance with the first distance threshold value, and judging the equipment accessed by the call according to the first distance threshold value; or
And when the type of the lower hanging device is an optical fiber repeater, comparing the transmission distance with the second distance threshold value, and judging the device accessed by the call according to the second distance threshold value.
The technical scheme of the invention has the following advantages or beneficial effects: based on basic data and service data of an operator, the transmission delay of electromagnetic waves in repeater equipment of different types is utilized, and whether the mobile terminal is accessed through a service cell or the downlink equipment of the service cell is calculated through a threshold classification judgment method so as to adapt to more application scenes; meanwhile, the invention keeps low cost of development and deployment application, does not need to add any special auxiliary equipment, and can judge by only using telecommunication basic data and service data.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
Fig. 1 is a flow chart of a method for distinguishing access devices in a wireless network according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an operating principle of a donor cell and its downlink device in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The present invention includes a method for distinguishing access devices in a wireless network, which is used for distinguishing a current access device in the wireless network as a serving cell or a downlink device of the serving cell, as shown in fig. 1, and at least one distance threshold is set in advance according to a direct coverage distance range of the serving cell, and the method further includes:
step S1, collecting the user call record of the mobile terminal, and obtaining the service cell of the call from the user call record;
step S2, calculating the transmission distance of the signal sent by the mobile terminal according to the transmission time delay in the user call record;
step S3, inquiring basic data corresponding to the service cell of the call, inquiring whether the service cell has the hanging-down device according to the basic data, and continuously inquiring the type of the hanging-down device when inquiring that the service cell has the hanging-down device;
step S4, calling a corresponding distance threshold from the at least one distance threshold according to the type of the drop device, and comparing the transmission distance with the corresponding distance threshold:
if the transmission distance is greater than or equal to the distance threshold value, the call of the mobile terminal is accessed by the drop-off device;
if the transmission distance is smaller than the distance threshold value, the call of the mobile terminal is directly accessed by the serving cell.
Specifically, since the downlink device (e.g., repeater) of the serving cell often has a distance of several tens of meters to several tens of kilometers from the base station of the serving cell, the two devices are transmitted through media such as an optical fiber, a feeder line, and an air interface. The electromagnetic wave propagates in these media with its inherent propagation speed, so that through the propagation delay (time in nature) of multipath, the transmission distance of the signal sent by the mobile terminal can be obtained by multiplying the transmission speed by the transmission delay.
Further, as shown in fig. 2, since the coverage distance range of the serving cell 1 (donor cell) is limited, for the mobile terminal 2 beyond the coverage distance range of the donor cell, it needs to access through the drop-off device of the donor cell, for example, through the repeater 3. At least one distance threshold value is preset according to the direct coverage distance range of the donor cell, the distance threshold value is larger than the maximum distance in the direct coverage distance range of the donor cell, and if the transmission distance of a signal sent by the mobile terminal is larger than or equal to the distance threshold value, the mobile terminal can be judged to be accessed through a downlink repeater of the donor cell; if the transmission distance is less than the distance threshold, it can be determined that the donor cell is directly accessed.
Through the technical scheme, the technical scheme of the invention mainly utilizes the call records of the user, namely the service data, and the basic data in the telecommunication network for judgment, and does not need to additionally increase hardware equipment, so that the low-cost deployment can be realized, and the application scene of the mobile terminal is enriched.
As an alternative embodiment, the base data includes base station data and/or outdoor repeater data and/or indoor coverage site data. Wherein, the base station data includes base station identifiers, such as bsts ID, eNode BID, and gdnodeb ID; base station types such as outdoor base station and indoor base station; base station latitude and longitude; physical identifiers of the serving cell, such as PN, PCI. The outdoor repeater data comprises an outdoor repeater identifier, such as a station number and the like; outdoor repeater types such as portable repeaters, radio frequency repeaters, fiber optic repeaters (including macro-station coupling and micro-cell coupling), etc.; a donor base station and a donor sector of the outdoor repeater; the longitude and latitude of the outdoor repeater. The indoor coverage site data comprises an indoor branch base station identifier; indoor coverage site types such as microcell, fiber optic repeater, radio frequency repeater, macro station coupling, microcell coupling, etc.; indoor division station longitude and latitude; indoor distribution coverage, such as basement, elevator, concrete floor etc..
As an optional implementation, the main field of the user call record includes the mobile terminal identification and/or the timestamp of the network event and/or the physical identifiers of the serving network element and the non-serving network element and/or the serving cell and the non-serving cell and/or the network event and/or the transmission delay of the serving cell and the non-serving cell signals to the mobile terminal.
Specifically, each call from the mobile terminal will generate a user call record (in some scenarios, a user call detail record, such as MRO data reported by periodic measurement, will be generated even if there is no call). The user call detail record can report information of a service cell, a non-service cell, transmission delay and the like of the call, and can be used for judging the network element of the mobile terminal access network. The user call records include a radio side user call detail record such as a CDR (call-detail record), an MRO (measurement report of sample class), and a core side user call record such as a CHR (call history report).
The main fields of the subscriber call record include: mobile terminal identification, such as MDN, IMSI, IMEI, S1AP ID, GUTI MTMSI, etc.; time stamps of network events, such as call date, start time stamp, end time stamp, measurement report time stamp, etc.; serving network elements and non-serving network elements, such as base station identifiers, cell identifiers, sector numbers, and the like; physical identifiers of serving and non-serving cells, such as PN, PCI, etc.; network events such as first measurement report first PSMM/RUM/MRO and last measurement report last PSMM/RUM/MRO; the transmission delay of the serving cell and non-serving cell signals to the mobile terminal, such as round-trip delay (round-trip delay), Timing Advance (TA), timing advance fitted by RSRP, and the like.
As an optional implementation, the at least one distance threshold includes a first distance threshold and a second distance threshold;
when the type of the hanging-down equipment is a portable repeater or a radio frequency repeater, comparing the transmission distance with a first distance threshold value, and judging the equipment accessed by the call according to the first distance threshold value; or
And when the type of the equipment hung down is an optical fiber repeater, comparing the transmission distance with a second distance threshold value, and judging the equipment accessed by the call according to the second distance threshold value.
Specifically, in the embodiment of the present invention, different distance threshold values need to be set according to different types of the downlink devices of the donor cell. The distance threshold value is set according to the actual situation of the current network of the local construction, and the distance between stations, the time delay of repeater equipment, the distance between the repeater and the donor base station, the feeder line length and the like in a typical coverage scene are comprehensively considered. Taking a 2G network as an example, when the lower-hanging device is an rf repeater and a portable repeater, the device one-way delay of the rf repeater and the portable repeater is generally 5us, and the round-trip delay is 5/0.813 × 2(chip), then the first distance threshold may be set to be equal to the round-trip delay of the device of the rf repeater and the portable repeater, that is, the distance 1 (chip) is 12.3 × 8 (chip), and the distance 1 is used to represent the first distance threshold. In the judgment process of the system, the general principle is that the signal time delay of the mobile terminal accessed by the radio frequency repeater or the portable repeater is basically larger than the time delay of repeater equipment, the distance between the repeater and the donor base station and the length of a feeder line. Therefore, in this embodiment, if the signal delay of the mobile terminal is greater than or equal to 130.4(chip), it is determined that the mobile terminal is a drop-off device, i.e., a radio frequency repeater or a portable repeater, for the current call access; and if the signal delay of the mobile terminal is less than 130.4(chip), judging that the current call of the mobile terminal is accessed to the donor base station.
When the type of the down-hanging equipment is an optical fiber repeater, for example, a 2G network is taken as an example, the device one-way delay of the optical fiber repeater is 13us, and the round-trip delay is 13/0.813 × 2 ═ 32 (chip); let thread2 be 32 × 8 — 256(chip), and thread2 be used to indicate the second distance threshold. If the signal time delay of the mobile terminal is greater than or equal to 256(chip), judging that the current call access of the mobile terminal is a down-hanging device, namely an optical fiber repeater; if the signal delay of the mobile terminal is less than 256(chip), the mobile terminal is judged to be the donor base station accessed by the call.
The technical scheme of the invention has the following advantages or beneficial effects: based on basic data and service data of an operator, the transmission delay of electromagnetic waves in repeater equipment of different types is utilized, and whether the mobile terminal is accessed through a service cell or the downlink equipment of the service cell is calculated through a threshold classification judgment method so as to adapt to more application scenes; meanwhile, the invention keeps low cost of development and deployment application, does not need to add any special auxiliary equipment, and can judge by only using telecommunication basic data and service data.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A method for distinguishing access equipment in a wireless network is used for distinguishing the current access equipment in the wireless network as a service cell or a downlink equipment of the service cell, and is characterized in that at least one distance threshold value is set in advance according to the direct coverage distance range of the service cell, and the method further comprises the following steps:
acquiring a user call record of a mobile terminal, and acquiring the service cell of the call from the user call record;
calculating the transmission distance of the signal sent by the mobile terminal according to the transmission delay in the user call record;
inquiring basic data corresponding to the service cell of the call, inquiring whether the service cell has the hanging-down equipment or not according to the basic data, and continuously inquiring the type of the hanging-down equipment when the service cell is inquired to have the hanging-down equipment;
calling the corresponding distance threshold value from the at least one distance threshold value according to the type of the downlink device, and comparing the transmission distance with the corresponding distance threshold value:
if the transmission distance is greater than or equal to the distance threshold value, the call of the mobile terminal is accessed by the hanging-down device;
and if the transmission distance is smaller than the distance threshold value, the call of the mobile terminal is directly accessed by the serving cell.
2. The method of claim 1, wherein the at least one distance threshold value is greater than a maximum coverage distance in a direct coverage distance range of the serving cell.
3. The method of claim 1, wherein the base data comprises base station data and/or outdoor repeater data and/or indoor coverage site data.
4. A method according to claim 3, characterized in that the base station data comprises base station identification and/or base station type and/or base station latitude and longitude and/or physical identifier of the serving cell.
5. The method of claim 3 wherein the outdoor-repeater data comprises outdoor-repeater identification and/or outdoor-repeater type and/or longitude and latitude of a donor base station and/or donor sector of an outdoor repeater and/or an outdoor repeater.
6. A method according to claim 3, wherein the indoor coverage site data comprises indoor base station identification and/or indoor coverage site type and/or indoor coverage site longitude and latitude and/or indoor distributed coverage.
7. The method according to claim 1, wherein the main field of the user call record comprises the mobile terminal identity and/or the timestamp of the network event and/or the physical identifiers of the serving and non-serving network elements and/or the serving and non-serving cells and/or the transmission delay of the network event and/or the serving and non-serving cell signals to the mobile terminal.
8. The method of claim 1, wherein the at least one distance threshold comprises a first distance threshold and a second distance threshold;
when the type of the hanging-down equipment is a portable repeater or a radio frequency repeater, comparing the transmission distance with the first distance threshold value, and judging the equipment accessed by the call according to the first distance threshold value; or
And when the type of the lower hanging device is an optical fiber repeater, comparing the transmission distance with the second distance threshold value, and judging the device accessed by the call according to the second distance threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110904466.4A CN114040430B (en) | 2021-08-06 | 2021-08-06 | Method for distinguishing access equipment in wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110904466.4A CN114040430B (en) | 2021-08-06 | 2021-08-06 | Method for distinguishing access equipment in wireless network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114040430A true CN114040430A (en) | 2022-02-11 |
| CN114040430B CN114040430B (en) | 2023-05-12 |
Family
ID=80139831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110904466.4A Active CN114040430B (en) | 2021-08-06 | 2021-08-06 | Method for distinguishing access equipment in wireless network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114040430B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528405A2 (en) * | 2003-10-31 | 2005-05-04 | Samsung Electronics Co., Ltd. | Method for calculating a time delay introduced by a repeater in mobile communication network |
| JP2009253560A (en) * | 2008-04-03 | 2009-10-29 | Couei Corp | Transmission source determination program, recording medium, and transmission source determining method |
| CN103906100A (en) * | 2012-12-28 | 2014-07-02 | 中国移动通信集团山东有限公司 | Repeater determining method and device |
| CN104284415A (en) * | 2013-07-01 | 2015-01-14 | 北京亿阳信通科技有限公司 | Mobile terminal positioning method and device thereof |
| US9584966B1 (en) * | 2015-09-30 | 2017-02-28 | Viavi Solutions Uk Limited | Determining an indoor/outdoor classification for a call |
| CN112564782A (en) * | 2019-09-26 | 2021-03-26 | 中国电信股份有限公司 | Repeater detection method, device, network management system and storage medium |
-
2021
- 2021-08-06 CN CN202110904466.4A patent/CN114040430B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528405A2 (en) * | 2003-10-31 | 2005-05-04 | Samsung Electronics Co., Ltd. | Method for calculating a time delay introduced by a repeater in mobile communication network |
| JP2009253560A (en) * | 2008-04-03 | 2009-10-29 | Couei Corp | Transmission source determination program, recording medium, and transmission source determining method |
| CN103906100A (en) * | 2012-12-28 | 2014-07-02 | 中国移动通信集团山东有限公司 | Repeater determining method and device |
| CN104284415A (en) * | 2013-07-01 | 2015-01-14 | 北京亿阳信通科技有限公司 | Mobile terminal positioning method and device thereof |
| US9584966B1 (en) * | 2015-09-30 | 2017-02-28 | Viavi Solutions Uk Limited | Determining an indoor/outdoor classification for a call |
| CN112564782A (en) * | 2019-09-26 | 2021-03-26 | 中国电信股份有限公司 | Repeater detection method, device, network management system and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| 谢永霞: "基于直放站模型算法的无线网络优化研究", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 郭怀忠: "直放站的应用浅析", 《广东通信技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114040430B (en) | 2023-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100358369C (en) | Mobile communication system for administrative zone business and its method | |
| US20110130135A1 (en) | Coverage hole detector | |
| CN101394647B (en) | Method and system for realizing cell networking | |
| US20040203717A1 (en) | Method, system and radio network management functionality for radio data mapping to physical location in a cellular telecommunications network | |
| US6459695B1 (en) | System and method for determining radio frequency coverage trouble spots in a wireless communication system | |
| EP1304897A1 (en) | Methods and apparatus for providing data for enabling location of a mobile communications device | |
| US20120071157A1 (en) | Method for Mobile Network Coverage Experience Analysis and Monitoring | |
| CN105516986A (en) | Method for detecting pseudo base station, terminal, data processor and system | |
| CN103796241A (en) | Method for judging and positioning pseudo base station based on reported information of terminal | |
| CN103067990B (en) | For determining the method for the base station that cellular device is transferred | |
| CN103369581A (en) | Method and device for obtaining terminal MDT (Minimization of Drive-Tests) data | |
| CN101877872A (en) | Method, device and system for optimizing network access performance | |
| CN102868990A (en) | Neighboring relationship configuration implementation method, system and device | |
| CN106465328A (en) | Method and system for estimating the geographical distance or for estimating a range of the geographical distance between at least two user equipments, mobile communication network, user equipment, program and computer program product | |
| CN104469831A (en) | Method and device for detecting network coverage shrinkage failure | |
| CN101114875A (en) | Mobile communications network link performance measuring system and method | |
| Francisco et al. | Improving LoRa network simulator for a more realistic approach on LoRaWAN | |
| CN100488127C (en) | Information tracking method and system | |
| US9113366B2 (en) | Method for identifying area, wireless base station, mobile terminal, and wireless communication system | |
| EP2584814B1 (en) | Method and radio network control for tracking the international mobile station equipment identity of user equipment | |
| CN114040430B (en) | Method for distinguishing access equipment in wireless network | |
| KR100728409B1 (en) | Wireless broadband internet system for supporting location based service | |
| CN101330656A (en) | Tracing method according to terminal capability | |
| KR100501042B1 (en) | Method for analysys inner call to each fmc in mobile communication system | |
| CN107205223B (en) | Personnel positioning method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |