CN1713771A - Adjacent zone terminal monitoring method in mobile communicating system from network control - Google Patents
Adjacent zone terminal monitoring method in mobile communicating system from network control Download PDFInfo
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- CN1713771A CN1713771A CN 200410049624 CN200410049624A CN1713771A CN 1713771 A CN1713771 A CN 1713771A CN 200410049624 CN200410049624 CN 200410049624 CN 200410049624 A CN200410049624 A CN 200410049624A CN 1713771 A CN1713771 A CN 1713771A
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- 230000011664 signaling Effects 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 43
- 238000010295 mobile communication Methods 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 8
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Abstract
After service connection between terminal and network is built, the network is used to calculate location of terminal. With the cell coverage prediction result obtained at stage of network planning, the network selects neighboring cell that should be monitored by terminal, and informs the terminal with signaling. After terminal receives the notice, it controls the action of terminal and neighboring cell needing to monitor based on message of neighboring cell and state of terminal itself carried by the signaling.
Description
Technical field
The present invention relates to a kind of being applicable in the mobile communication system, come the method for the neighbor cell that control terminal monitored by network with the signaling portable terminal.
Background technology
Switching is Eternal Theme in any cell mobile communication systems, in handoff procedure, determines the performance important influence of target neighbor cell to switching of portable terminal.In the network of reality, because the complexity of the restricted and radio transmission of the base station siting of station, area that each logic district covered and shape thereof have nothing in common with each other and vary, border between the neighbor cell usually be interlocking together, like this, the distribution of the neighbor cell of each Serving cell also is to distribute big directly different mutually with the adjacent sub-district of desirable honeycomb hexagonal cell.In order to guarantee certain performance of handoffs requirement, this just requires just need select suitable neighbor cell for each Serving cell in the network planning stage, simultaneously at network operation and maintenance phase, the suggestion that the result that network optimization personnel also can analyze according to the network optimization at any time provides the neighbor cell list to Serving cell to increase and decrease.Therefore, the neighbor cell list of each Serving cell has nothing in common with each other and quantity also is not wait in the real network.For example, in the existing standard of TD-SCDMA system, the homogeneous frequency adjacent area maximum of stipulating each Serving cell can not surpass 32, alien frequencies neighbor cell maximum can not surpass 32 etc.
Actual system is when operation, to in whole cell range, broadcast according to the neighbor cell list organization system message of determining, and the mobile terminal device in the network will be determined the action of terminal according to the system broadcast message that receives, for example, after terminal enters connection mode and converses, terminal can be carried out the measurement of neighbor cell pilot signal continuously according to adjacent cell list, and after measurement result meets some requirements, organize measurement report that the measurement result of the pilot signal of several the strongest adjacent sub-districts is reported network, the mode that reports can report of employing cycle or event report.Network in conjunction with the judgement to system resource condition, finds the adjacent sub-district an of the best in the some the strongest adjacent sub-district of terminal to report after receiving the measurement of correlation report, and control terminal switches to this neighbour sub-district.Therefore, a normal portable terminal switching flow may further comprise the steps:
1, terminal is measured the related parameter that has of this sub-district and adjacent sub-district, and measurement result is reported network.
2, the network judgement of switching.
3, carry out the execution of handoff procedure by network control.
4, the affirmation of switching result, if success then the relevant status indicator of corresponding modify, if failure then to keep former connection constant.
In the middle of above-mentioned switching flow, the method that portable terminal is directly measured all adjacent sub-districts according to neighbor cell list is not considered the physical location of portable terminal, and this makes the measurement of quite a few adjacent sub-district seem nonsensical concerning terminal.This is that it is to have considered that is waited to investigate a tabulation that obtains behind all possible neighbor cell of Serving cell because the information of adjacent cells in the present system broadcast message generated in the network planning stage.With regard to the method that the employing coverage prediction generates adjacent sub-district automatically, it is with on all grid points in the cell coverage area, according to certain criterion, as the pilot signal strength difference get within the specific limits or directly need the adjacent number of cells of investigating on each grid point in addition can also further consider performance of handoffs and the distribution of traffic situation after and neighbor cell on all grid points of obtaining superposes the back and a tabulation obtaining.To the useful adjacent sub-district of terminal then only is that terminal is in the neighbor cell on a certain grid point of map, and therefore, when terminal moved to the edge, sub-district, the neighbor cell on the grid point of this other end edge, sub-district may be skimble-skamble concerning this terminal.Obviously, existing adjacent sub-district define method has increased the burden that terminal is measured.In addition,, and therefrom find out the strongest several of pilot signal and report because terminal must monitor the sub-district in all adjacent cell lists, when adjacent number of cells more for a long time, the performance of measuring is had certain influence.
Accompanying drawing 1 has provided the mobile communication system schematic diagram of a desirable honeycomb, and it has certain difference with the honeycomb of reality, but still can be used for the explanation of the relevant notion of the present invention.All base stations among the figure all are connected with radio network controller (RNC), and the part line that only drawn here is as signal.With base station 1 is example, its adjacent sub-district can be adjacent on every side all sub-districts (base station 2 to the base station 7 in the accompanying drawing), in the system message broadcasting of base station 1, this adjacent cell list information all terminals in the sub-district are broadcasted, and terminal is carried out the measurement of adjacent sub-district after receiving the content that also correctly obtains wherein.But for terminal B, because its position is relatively near base station 1, therefore, it may temporarily also can not switch, and the measurement of just carrying out adjacent sub-district according to the definition of adjacent cell list at this moment obviously is the waste to the terminal measurement capability.For terminal A, if it is away from base station 1 and may be close to the direction of base station 3 and base station 4, then at this moment its measurement that may need to carry out only is base station 3 and base station 4, and if still base station 6 and base station 7 are measured and just seemed and there is no need.
Summary of the invention
The purpose of this invention is to provide the method for monitoring neighbor cell in a kind of mobile communication system by the terminal of network control.
Main thought of the present invention is traditional portable terminal directly only to be changed into all adjacent sub-district measurements according to neighbor cell list the sub-district adjacent with the terminal physical location measured.
Detect the method for neighbor cell in the mobile communication system provided by the invention by the portable terminal of network control, may further comprise the steps:
After the business of portable terminal and network was connected foundation, radio network controller calculated the portable terminal coordinate position;
Radio network controller is according to the portable terminal coordinate position of being calculated, the neighbor cell of selecting portable terminal to monitor the sub-district coverage prediction result who obtains from the network planning stage, with it by the signaling portable terminal;
After portable terminal is notified, according to the measurement of the adjacent cell information startup of carrying in the signaling to selected adjacent sub-district.
Wherein, in the step of calculating the portable terminal coordinate position, radio network controller calculates the portable terminal coordinate position according to the location measurement information that portable terminal and base station report.
Wherein, the location measurement information of described mobile terminal reporting comprises that the time that is used for location Calculation shifts to an earlier date TA information, and the location measurement information that described base station reports comprises the arrival angle AOA information that is used to locate.
Wherein, in the step of the neighbor cell of selecting portable terminal to detect, RNC is according to the portable terminal coordinate position of being calculated, in the base station coverage prediction result data table that is stored in advance in the RNC, search the grid at portable terminal place, determine the adjacent sub-district that portable terminal should be monitored then on this map grid.
Wherein, described mobile communication system is the TD-SCDMA communication system.
Wherein, described mobile communication system is CDMA2000 communication system or WCDMA communication system.
According to a further aspect in the invention, provide the method that detects neighbor cell in a kind of mobile communication system by the portable terminal of network control, may further comprise the steps:
A) portable terminal is set up professional the connection with network;
B) portable terminal is measured the related parameter that has of this sub-district, and measurement result is reported network;
C) base station reports the metrical information relevant with this portable terminal to the radio network controller (RNC) of network side;
D) RNC is according to the exact position of AOA in the measurement reporting information and TA location measurement information calculating portable terminal;
E) RNC searches the grid at portable terminal place in the base station coverage prediction result data table that is stored in advance in the RNC according to the position of portable terminal;
F) RNC determines the adjacent sub-district that portable terminal should be monitored and uses the signaling portable terminal on this map grid;
G) portable terminal is according to the measurement of the startup of the information of adjacent cells in the signaling of receiving to the adjacent sub-district of determine.
Wherein, the time that has related parameter to comprise to be used for location Calculation of described sub-district shifts to an earlier date TA information, and the described parameter relevant with portable terminal comprises the arrival angle AOA information that is used to locate.
Wherein, described mobile communication system is the TD-SCDMA communication system.
Adopt method of the present invention, can avoid mobile terminal device to connect and set up the measurement of back too much uncorrelated neighbor cell in business.This method also can be used for carrying out the control of baton handover process by the TD-SCDMA system, is convenient to UE determines to carry out open loop presynchronization after receiving measurement of correlation control signaling sub-district.This method can be warm well with existing mobile communications system, as a kind of means that can the optimization system performance.
By below in conjunction with the accompanying drawing detailed description of the invention, can make above and other objects of the present invention, advantage and characteristics become clearer.
Description of drawings
Fig. 1 is the mobile communication system schematic diagram of a desirable honeycomb;
Fig. 2 is a specific embodiment flow chart of determining the neighbor cell that needs are measured according to the terminal positioning metrical information of the present invention.
Embodiment
The method of the solution prior art drawback that the present invention proposes can be described as: after the business of terminal and network is connected foundation, the terminal location that utilizes network calculations to go out, according to the sub-district coverage prediction result who obtains in the network planning stage, the neighbor cell that should monitor by the network selecting terminal, and by the signaling terminal, terminal is after notified, according to the adjacent cell information of carrying in the signaling and in conjunction with state and the behavior of information Control terminal and the neighbor cell that needs are monitored of terminal itself.
Put it briefly, detect the method for neighbor cell in the mobile communication system of the present invention by the portable terminal of network control, may further comprise the steps:
After the business of portable terminal and network was connected foundation, radio network controller calculated the portable terminal coordinate position;
Radio network controller is according to the portable terminal coordinate position of being calculated, the neighbor cell of selecting portable terminal to monitor the sub-district coverage prediction result who obtains from the network planning stage, with it by the signaling portable terminal;
After portable terminal is notified, according to the measurement of the adjacent cell information startup of carrying in the signaling to selected adjacent sub-district.
Wherein, in the step of calculating the portable terminal coordinate position, radio network controller calculates the portable terminal coordinate position according to the location measurement information that portable terminal and base station report.
Wherein, the location measurement information of described mobile terminal reporting comprises that the time that is used for location Calculation shifts to an earlier date TA information, and the location measurement information that described base station reports comprises the arrival angle AOA information that is used to locate.
Wherein, in the step of the neighbor cell of selecting portable terminal to detect, RNC is according to the portable terminal coordinate position of being calculated, in the base station coverage prediction result data table that is stored in advance in the RNC, search the grid at portable terminal place, determine the adjacent sub-district that portable terminal should be monitored then on this map grid.
Wherein, described mobile communication system is the TD-SCDMA communication system.
Wherein, described mobile communication system is CDMA2000 communication system or WCDMA communication system.
Be example with the TD-SCDMA system below, the idiographic flow that is detected neighbor cell in the mobile communication system by the portable terminal of network control be described:
1, terminal is set up professional the connection with network.
2, terminal is measured the related parameter (shifting to an earlier date TA information comprising the time that is used for location Calculation) that has of this sub-district, and measurement result is reported network.
3, the base station reports the metrical information relevant with this terminal (comprising the AOA information that is used to locate) to the radio network controller (RNC) of network side.
4, RNC is according to the AOA in the measurement reporting information and the exact position of TA location measurement information computing terminal.
5, RNC searches the grid at terminal place in the base station coverage prediction result data that is stored in advance in the RNC according to the position of terminal.
6, RNC determines the adjacent sub-district that terminal should be monitored and uses the signaling terminal on this map grid.
7, terminal is according to the measurement of the startup of the information of adjacent cells in the signaling of receiving to adjacent sub-district.
Above-mentioned flow process also is applicable in other cell mobile communication systems, at this moment just be used for the terminal positioning Calculation Method in the step 2,3,4 and measuring amount different.In addition, in concrete enforcement of the present invention, base station coverage prediction result can be a kind of data structure with digital map features that is stored in the network, it is an index with each grid in each cell coverage area, can store that the pilot signal that comprises Serving cell on this grid point predicts the outcome and the pilot signal of neighbor cell to be investigated predicts the outcome, the quantity of neighbor cell can be more than one.Owing to be the storage that least unit is carried out data in the system, when practical application the present invention program, need consider in earnest that the precision of terminal positioning and memory data output are to determine the true resolution size of each grid point with the grid.
Fig. 2 provides the specific embodiment flow process of determining the neighbor cell that needs are measured among a present invention according to the terminal positioning metrical information, and this flow process realizes in the radio network controller of network side.As shown in the figure, in step 1, the location measurement information that RNC receiving terminal and base station report respectively.In step 2, RNC adopts the coordinate position of method for calculating and locating according to the location measurement information computing terminal.In step 3, RNC searches the coverage prediction data at corresponding grid point place according to the coordinate position that calculates.Subsequently, RNC judges whether that according to the coverage prediction data needs start the measurement to adjacent sub-district, for example can adopt criterion: P
1-P
2＜Δ, P here
1Be the intensity of the strong waveguide frequency signal at this grid point place, P
2Be the intensity of the inferior strong waveguide frequency signal at this grid point place, the threshold value of Δ for setting.Like this, if P
1-P
2＜Δ satisfies, and the adjacent sub-district that the grid point place that then will be correlated with need monitor is to measure control control messages notice portable terminal.
In sum, method of the present invention can be avoided mobile terminal device to connect in business and set up the measurement of back to too much uncorrelated neighbor cell.This method also can be used for carrying out the control of baton handover process by the TD-SCDMA system, is convenient to UE determines to carry out open loop presynchronization after receiving measurement of correlation control signaling sub-district.This method can be warm well with existing mobile communications system, as a kind of means that can the optimization system performance.
Claims (9)
1, detected the method for neighbor cell in a kind of mobile communication system by the portable terminal of network control, it is characterized in that: it may further comprise the steps:
After the business of portable terminal and network was connected foundation, radio network controller calculated the portable terminal coordinate position;
Radio network controller is according to the portable terminal coordinate position of being calculated, the neighbor cell of selecting portable terminal to monitor the sub-district coverage prediction result data table that obtains from the network planning stage, with it by the signaling portable terminal;
After portable terminal is notified, according to the measurement of the adjacent cell information startup of carrying in the signaling to selected adjacent sub-district.
2, method according to claim 1, wherein, in calculating portable terminal coordinate position step, radio network controller calculates the portable terminal coordinate position according to the location measurement information that portable terminal and base station report.
3, method according to claim 2, wherein, the location measurement information of described mobile terminal reporting comprises that the time that is used for location Calculation shifts to an earlier date TA information, the location measurement information that described base station reports comprises the arrival angle AOA information that is used to locate.
4, method according to claim 1, wherein, in the neighbor cell step of selecting portable terminal to detect, RNC is according to the portable terminal coordinate position of being calculated, in the base station coverage prediction result data table that is stored in advance in the RNC, search the grid at portable terminal place, determine the adjacent sub-district that portable terminal should be monitored then on this map grid.
5, method according to claim 1, wherein, described mobile communication system is the TD-SCDMA communication system.
6, method according to claim 1, wherein, described mobile communication system is CDMA2000 communication system or WCDMA communication system.
7, detect the method for neighbor cell in a kind of mobile communication system by the portable terminal of network control, may further comprise the steps:
A) portable terminal is set up professional the connection with network;
B) portable terminal is measured the related parameter that has of this sub-district, and measurement result is reported network;
C) base station reports the metrical information relevant with this portable terminal to the radio network controller (RNC) of network side;
D) RNC is according to the exact position of AOA in the measurement reporting information and TA location measurement information calculating portable terminal;
E) RNC searches the grid at portable terminal place in the base station coverage prediction result data table that is stored in advance in the RNC according to the position of portable terminal;
F) RNC determines the adjacent sub-district that portable terminal should be monitored and uses the signaling portable terminal on this map grid;
G) portable terminal is according to the measurement of the startup of the information of adjacent cells in the signaling of receiving to the adjacent sub-district of determine.
8, method according to claim 7, wherein, the time that has related parameter to comprise to be used for location Calculation of described sub-district shifts to an earlier date TA information, and the described parameter relevant with portable terminal comprises the arrival angle AOA information that is used to locate.
9, method according to claim 7, wherein, described mobile communication system is the TD-SCDMA communication system.
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| CN100546405C (en) * | 2006-05-29 | 2009-09-30 | 大唐移动通信设备有限公司 | A kind of method that generates adjacent sub-district |
| CN101076178B (en) * | 2007-07-19 | 2010-06-09 | 华为技术有限公司 | Method and apparatus for planning adjacent domain |
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| CN102348215A (en) * | 2010-08-04 | 2012-02-08 | 中兴通讯股份有限公司 | Method for measuring neighbor cell relation and system thereof, and network side equipment |
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