CN101128059A - An identification method for destination switching cell - Google Patents
An identification method for destination switching cell Download PDFInfo
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- CN101128059A CN101128059A CNA2007101542002A CN200710154200A CN101128059A CN 101128059 A CN101128059 A CN 101128059A CN A2007101542002 A CNA2007101542002 A CN A2007101542002A CN 200710154200 A CN200710154200 A CN 200710154200A CN 101128059 A CN101128059 A CN 101128059A
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Abstract
The utility model discloses a determination method of target switching districts, comprising a radio network controller (RNC), which is characterized in that the RNC utilizes the survey report events in the wideband code division multiple assess (WCDMA) system to determine the steady-state priority of the districts, the common priority of the districts is determined; at least two districts with higher common priority are selected, and the district with the highest steady-state priority is selected from the districts as the target switching district. The determination method of target switching districts of the utility model combines the steady-state priority of the districts to determine the target switching districts based on determining common priority, improves the problems of excessively frequent district switching and unstable district switching, real-time adjusts the priority of the districts according to survey reports, stores the historical survey results without using a great deal of resources, and is convenient in calculation.
Description
Technical field
The present invention relates to the sub-district handoff technique of mobile communication, be specifically related to a kind of identification method for destination switching cell.
Background technology
Carry out in the professional process the mobile subscriber, in order to make business be based upon best sub-district and to realize professional continuity, introduced the notion of switching, be used to guarantee that Radio Resource still can keep continuity at subscriber equipment (UE) when a sub-district moves to another sub-district.
Handoff procedure is divided into three phases usually: the definite and switching of cell measurement, Target cell starts, switches and carry out.Specifically, UE measures the signal of adjacent area in communication process, and reporting measurement reports is selected best sub-district for radio network controller (RNC), the measurement result that RNC reports according to UE to initiate to switch as Target cell.Selection to best cell generally is to consider from the following aspects: the hierarchy of the signal quality of sub-district, the path loss of sub-district, sub-district and the load sharing of sub-district.
A kind of method of determining native region priority according to area interference is proposed among the patent application CN200510079862, the external interference value of the cell measurement reporting calculation plot that received bandwidth total power that this method is reported according to the base station by RNC and UE report, height according to interference value is adjusted the priority of sub-district, if external interference value height, the priority of sub-district reduces.
Patent application CN200510000473 also proposes a kind of path loss and the load of sub-district method of determining native region priority in conjunction with the sub-district, RNC receives the measurement report from UE, according to the cell load of carrier wave on several path loss measurement report values and its corresponding several base stations, determine the carrier wave of the handover-target base station and the switching target small area correspondence of load balancing.
Above-mentioned two kinds of methods are all optimized the ordering of switching cell, can select best sub-district, comprehensive aspect as far as possible.But, be used in the said method determining that the cell information of native region priority all is real-time, there is not historical situation in conjunction with the sub-district, though under the stable situation of cell signal relatively effectively, but wireless environment is not unalterable, signal in the sub-district exists under the situation of fluctuation, adopts said method to determine that native region priority causes the sub-district to switch too frequently, switch problems such as instability probably.
Fig. 1 switches schematic diagram for there is the sub-district under the fluctuation situation in cell signal, sub-district 11, sub-district 12 and sub-district 13 are at the information change curve of T1, T2, T3 time period as shown in Figure 1, sub-district 11 fluctuations are bigger, might cause UE to cut sub-district 11 in the T1 time, the T2 time is 11 incision sub-districts 12 from the sub-district, and the T3 time is the 12 switchback sub-districts 11 from the sub-district again.
Therefore need judge the stability of cell signal in conjunction with the cell history situation, more direct method is in real time the measured value of measurement report to be added up judgement, but need periodic measurement report like this, can take more Radio Resource, and RNC needs the space to preserve the historical measurement result of each sub-district, calculate frequently, expend system resource.Also can artificially analyze the stability of cell signal according to the statistics of RNC, the priority of the sub-district in the Neighboring Cell List be readjusted again, still, the shortcoming of doing like this is to be difficult to accomplish real-time adjustment, and needs regular cost manpower to go to check.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of identification method for destination switching cell, can adjust in real time, improves the sub-district and switches too frequent, sub-district unstable switching problem, and calculate easyly, need not to expend ample resources.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of identification method for destination switching cell, this method may further comprise the steps:
A, determine the steady-state priority of sub-district;
B, determine the normal priority of sub-district;
C, select a sub-district that above normal priority is high, from selected sub-district, select the highest sub-district of steady-state priority again as the target switching cell.
Determine described in the step a that steady-state priority comprises:
A1, radio network controller (RNC) are provided with the parameter of measurement event, and to the measurement report of user equipment (UE) configuration based on set parameter;
The steady-state priority of a2, initialization sub-district;
A3, adjust the steady-state priority of sub-district in real time according to the measurement report of being received.
Wherein, the described measurement event of step a1 is at the 1E incident of co-frequency cell and 1F incident, and/or at the 2C incident and the 2E incident of alien-frequency district.
For 1E incident and 1F incident at co-frequency cell, the described measurement parameter of step a1 is: the pilot signal quality CPICH Ec/N0 of Common Pilot Channel, or Common Pilot Channel letter of acceptance number power CPICH RSCP, or Common Pilot Channel propagation path loss CPICH pathloss; The described parameter that measurement event is set of step a1 is: thresholding and the thresholding that the 1F incident is set that the 1E incident is set; The described measurement report of step a2 is: the same-frequency measure reporting that comprises incident 1E/1F.
For 2C incident and 2E incident at alien-frequency district, the described measurement parameter of step a1 is CPICHEc/N0 or CPICH RSCP, and what the incident of carrying out was judged is the integrated value of all the sub-district CPICHEc/N0 calculating under the same frequency or the integrated value that all the sub-district CPICH RSCP under the same frequency calculate; The described parameter that measurement event is set of step a1 is: thresholding and the thresholding that the 2E incident is set that the 2C incident is set; The described measurement report of step a2 is: the different-frequency measure reporting that comprises incident 2C/2E.
Comprise step before the step a2: the excursion that limits native region priority is 0 to 15.
The described initialization native region priority of step a2 is: make the priority of each sub-district identical in the excursion of native region priority.
Following principle is followed in adjustment described in the step a3:
For co-frequency cell,, then reduce native region priority if the sub-district has been triggered the 1F/1E incident again in a period of time after triggering the 1E/1F incident; For alien-frequency district,, then reduce native region priority if the sub-district has been triggered the 2E/2C incident again in a period of time after triggering the 2C/2E incident; When native region priority was minimum, native region priority remained unchanged;
Perhaps,
For co-frequency cell, 1E or 1F incident do not take place if the sub-district continues for some time, then improve native region priority; For alien-frequency district, 2C or 2E incident do not take place if the sub-district continues for some time, then improve native region priority; Native region priority is when the highest, and native region priority remains unchanged;
Perhaps,
For co-frequency cell, if 1E or 1F incident only took place in a period of time in the sub-district, then priority remains unchanged; For alien-frequency district, if 2C or 2E incident only took place in a period of time in the sub-district, then priority remains unchanged.
The described definite normal priority of step b is: carry out prioritization according to the signal quality of sub-district or path loss or cell load or its combination in any.
Identification method for destination switching cell provided by the invention, determine the steady-state priority of sub-district according to the measurement report event in the broadband CDMA system, and determine the normal priority of sub-district according to instant messages such as cell signal quality, select a sub-district that above normal priority is higher afterwards, therefrom select the highest sub-district of steady-state priority again as the Target cell that switches.So, can improve the sub-district and switch too frequent, sub-district unstable switching problem, and can adjust the priority of sub-district in real time, need not to expend ample resources and preserve historical measurement result, calculate easy according to measurement report.
Description of drawings
Fig. 1 switches schematic diagram for there is the sub-district under the fluctuation situation in cell signal;
Fig. 2 determines the overview flow chart of target switching cell for the present invention;
Fig. 3 is for adjusting the local flow chart of co-frequency cell steady-state priority.
Embodiment
Identification method for destination switching cell of the present invention on the basis of determining normal priority, is determined the target switching cell in conjunction with the steady-state priority of sub-district, and the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 2 determines the overview flow chart of native region priority for the present invention, and as shown in Figure 2, definite method of the present invention may further comprise the steps:
Step 21: the steady-state priority of determining the sub-district.
How to determine that the sub-district steady-state priority specifically may further comprise the steps:
Step 211: radio network controller (RNC) is provided with the parameter of measurement event.Concrete, the thresholding that the measurement event 1E incident of co-frequency cell is set is T
1e, the thresholding of measurement event 1F incident is T
1f, the thresholding of the measurement event 2C incident of alien frequencies incident is T
2c, the thresholding of 2E incident is T
2e, wherein, 1E, 1F, 2C, 2E incident are the measurement report event in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system.
Generally speaking, the measurement parameter of 1E incident and 1F incident is: the pilot signal quality of Common Pilot Channel (CPICH Ec/N0), or Common Pilot Channel received signal code power (CPICH RSCP), or Common Pilot Channel propagation path loss (CPICH pathloss); The measurement parameter of 2C incident and 2E incident is CPICH Ec/N0 or CPICH RSCP, and what the incident of carrying out was judged is: the integrated value that all sub-district CPICH RSCP calculate under integrated value that all sub-district CPICH Ec/N0 calculate under the same frequency or the same frequency.
Different parameter threshold values are different, because parameter unit is all different, and can adjust threshold value as required.For the 1E incident, Ec/N0 is higher than thresholding, or RSCP is higher than thresholding, or pathloss is when being lower than thresholding, and the 1E incident is triggered; For the 1F incident, Ec/N0 is lower than thresholding, or RSCP is lower than thresholding, or pathloss is when being higher than thresholding, and the 1F incident is triggered; For the 2C incident, when the integrated value that is higher than thresholding or CPICH RSCP when the integrated value of CPICH Ec/N0 was higher than thresholding, the 2C incident was triggered; For the 2E incident, when CPICH Ec/N0 was lower than thresholding or CPICH RSCP and is lower than thresholding, the 2E incident was triggered.
Step 212:RNC reports subscriber equipment (UE) allocating and measuring.Here, RNC by measuring control messages to the measurement report of UE configuration is: comprise the same-frequency measure reporting of incident 1E and 1F and/or comprise the different-frequency measure reporting of incident 2C and 2E.
The steady-state priority of step 213:RNC initialization sub-district.
Here, weigh native region priority with numerical value, the excursion that limits priority is P
Min～P
Max, the numerical value of priority is big more, and expression priority is low more, and the more little priority of then representing of the numerical value of priority is high more, P
MinGenerally fixedly get 0, rationally choose P
MaxValue extremely important to the ordering of steady-state priority, if P
MaxToo small, be easy to just reach maximum or minimum value, there is not too big difference between the sub-district, can make the effect of steady-state priority little like this; If P
MaxExcessive, the priority that surpasses certain limit has not just had too big comparative sense.Generally speaking, P
MaxGet 15.
Because RNC can't grasp cell history information in initialization procedure, the steady-state priority of all sub-districts is identical, and therefore, described initialization is the priority initialize P that gives each sub-district in the excursion of native region priority
i=N (i=1,2 ..., T), wherein T is the number of cells of priority to be determined, Pmin≤N≤Pmax.
Step 214:RNC adjusts the steady-state priority of sub-district in real time according to measurement report.
Be provided with and judge that the stable time of system signal is t1, judge that the unsettled time of system signal is t2, in general, make t1 〉=t2, this is because jitter is thought in signal variation within a short period of time greatly, and signal continues the long little variation of time maintenance and just thinks signal stabilization.
For co-frequency cell r,, then adjust P if t2 has triggered 1F (1E) incident again in the time after having triggered 1E (1F) incident
r=P
r+ 1, reduce native region priority; If native region priority has been that priority remains unchanged under the minimum situation.If the sub-district continues the t1 time 1E or 1F incident do not take place, then adjust P
r=P
r-1, improve native region priority; If native region priority has been that priority remains unchanged under the highest situation.If 1E or 1F incident only took place in the sub-district t1 time, then priority remains unchanged.
Fig. 3 as shown in Figure 3, adjusts the sub-district steady-state priority and comprises for adjusting the local flow chart of co-frequency cell steady-state priority:
Steps A: the t1 timing begins.
Step B: whether judge the sub-district in t1 time internal trigger 1E (1F) incident, if, execution in step C; Otherwise adjust P
r=P
r-1, improve native region priority, and return steps A.Here, if native region priority is for the highest, then priority remains unchanged.
Step C:t1, the t2 timing begins.
Step D: judge whether t2 1F (1E) incident took place in the time, if, reduce native region priority, adjust P
r=P
r+ 1, execution in step F; Otherwise, execution in step E.Here, if native region priority has been minimum, then priority remains unchanged
Step e: whether judge the sub-district in t1 time internal trigger 1F (1E) incident, if, execution in step F; Otherwise adjust P
r=P
r-1, improve native region priority, and return steps A.Here, if native region priority is for the highest, then priority remains unchanged.
Step F: t1, the t2 time in.
Step G: judge whether t2 1E (1F) incident took place in the time, if, reduce native region priority, adjust P
r=P
r+ 1, return step C; Otherwise, execution in step H.Here, if native region priority has been minimum, then priority remains unchanged
Step H: whether judge the sub-district in t1 time internal trigger 1E (1F) incident, if, execution in step C; Otherwise adjust P
r=P
r-1, improve native region priority, and return steps A.Here, if native region priority is for the highest, then priority remains unchanged.
The adjustment principle of alien-frequency district priority is identical with co-frequency cell, the 1E/1F of co-frequency cell is replaced with 2C/2E get final product.
According to above-mentioned principle, the steady-state priority of sub-district is constantly carried out real-time update.
Step 22: the normal priority of determining the sub-district.According to the signal quality of sub-district, or path loss, or cell load, or its combination in any is carried out prioritization.Here, how to determine that according to different factors normal priority belongs to prior art, does not repeat them here.
Step 23: the normal priority that steady-state priority that integrating step 21 is determined and step 22 are determined, determine the target switching cell.Select a sub-district that above normal priority is higher earlier, therefrom select the highest sub-district of steady-state priority again as the Target cell that switches.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. an identification method for destination switching cell is characterized in that, this method may further comprise the steps:
A, determine the steady-state priority of sub-district;
B, determine the normal priority of sub-district;
C, select a sub-district that above normal priority is high, from selected sub-district, select the highest sub-district of steady-state priority again as the target switching cell.
2. method according to claim 1 is characterized in that, determines described in the step a that steady-state priority comprises:
A1, radio network controller (RNC) are provided with the parameter of measurement event, and to the measurement report of user equipment (UE) configuration based on set parameter;
The steady-state priority of a2, initialization sub-district;
A3, adjust the steady-state priority of sub-district in real time according to the measurement report of being received.
3. method according to claim 2 is characterized in that, the described measurement event of step a1 is at the 1E incident of co-frequency cell and 1F incident, and/or at the 2C incident and the 2E incident of alien-frequency district.
4. method according to claim 2 is characterized in that, the described measurement event of step a1 is at the 1E incident of co-frequency cell and 1F incident;
The described measurement parameter of step a1 is: the pilot signal quality CPICH Ec/N0 of Common Pilot Channel, or Common Pilot Channel letter of acceptance number power CPICH RSCP, or Common Pilot Channel propagation path loss CPICH pathloss;
The described parameter that measurement event is set of step a1 is: thresholding and the thresholding that the 1F incident is set that the 1E incident is set;
The described measurement report of step a2 is: the same-frequency measure reporting that comprises incident 1E/1F.
5. method according to claim 2 is characterized in that, the described measurement event of step a1 is at the 2C incident of alien-frequency district and 2E incident;
The described measurement parameter of step a1 is CPICH Ec/N0 or CPICH RSCP, and what the incident of carrying out was judged is the integrated value of all the sub-district CPICH Ec/N0 calculating under the same frequency or the integrated value that all the sub-district CPICH RSCP under the same frequency calculate;
The described parameter that measurement event is set of step a1 is: thresholding and the thresholding that the 2E incident is set that the 2C incident is set;
The described measurement report of step a2 is: the different-frequency measure reporting that comprises incident 2C/2E.
6. method according to claim 2 is characterized in that, comprises step before the step a2: the excursion that limits native region priority.
7. method according to claim 6 is characterized in that, the described initialization native region priority of step a2 is: make the priority of each sub-district identical in the excursion of native region priority.
8. according to claim 6 or 7 described methods, it is characterized in that the excursion of described native region priority is 0 to 15.
9. method according to claim 6 is characterized in that, following principle is followed in the adjustment described in the step a3:
For co-frequency cell,, then reduce native region priority if the sub-district has been triggered the 1F/1E incident again in a period of time after triggering the 1E/1F incident; For alien-frequency district,, then reduce native region priority if the sub-district has been triggered the 2E/2C incident again in a period of time after triggering the 2C/2E incident; When native region priority was minimum, native region priority remained unchanged;
Perhaps,
For co-frequency cell, 1E or 1F incident do not take place if the sub-district continues for some time, then improve native region priority; For alien-frequency district, 2C or 2E incident do not take place if the sub-district continues for some time, then improve native region priority; Native region priority is when the highest, and native region priority remains unchanged;
Perhaps,
For co-frequency cell, if 1E or 1F incident only took place in a period of time in the sub-district, then priority remains unchanged; For alien-frequency district, if 2C or 2E incident only took place in a period of time in the sub-district, then priority remains unchanged.
10. method according to claim 1 is characterized in that, the described definite normal priority of step b is: carry out prioritization according to the signal quality of sub-district or path loss or cell load or its combination in any.
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| CNA2007101542002A CN101128059A (en) | 2007-09-24 | 2007-09-24 | An identification method for destination switching cell |
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| CNA2007101542002A CN101128059A (en) | 2007-09-24 | 2007-09-24 | An identification method for destination switching cell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101557627B (en) * | 2008-04-10 | 2011-05-04 | 华为技术有限公司 | Method for reelecting cell, device and communication system |
| CN102131253A (en) * | 2008-04-10 | 2011-07-20 | 华为技术有限公司 | Method and device for cell reselection and communication system |
| CN102271362A (en) * | 2010-06-01 | 2011-12-07 | 鼎桥通信技术有限公司 | Method for cross RNC switching by user equipment and RNC |
| CN102892166A (en) * | 2012-09-19 | 2013-01-23 | 邦讯技术股份有限公司 | Method for controlling switching through home node B (HNB) |
| CN104661268A (en) * | 2015-03-16 | 2015-05-27 | 联想(北京)有限公司 | Information processing method, information processing device and mobile terminal |
| CN106664651A (en) * | 2014-08-08 | 2017-05-10 | 日本电气株式会社 | Communications system with idle mode terminal balancing |
| CN107969012A (en) * | 2017-11-28 | 2018-04-27 | 广东欧珀移动通信有限公司 | Network Access Method, mobile terminal and computer-readable recording medium |
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2007
- 2007-09-24 CN CNA2007101542002A patent/CN101128059A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101557627B (en) * | 2008-04-10 | 2011-05-04 | 华为技术有限公司 | Method for reelecting cell, device and communication system |
| CN102131253A (en) * | 2008-04-10 | 2011-07-20 | 华为技术有限公司 | Method and device for cell reselection and communication system |
| CN102131253B (en) * | 2008-04-10 | 2013-09-25 | 华为技术有限公司 | Method and device for cell reselection and communication system |
| CN102271362A (en) * | 2010-06-01 | 2011-12-07 | 鼎桥通信技术有限公司 | Method for cross RNC switching by user equipment and RNC |
| CN102271362B (en) * | 2010-06-01 | 2014-04-09 | 鼎桥通信技术有限公司 | Method for cross RNC switching by user equipment and RNC |
| CN102892166A (en) * | 2012-09-19 | 2013-01-23 | 邦讯技术股份有限公司 | Method for controlling switching through home node B (HNB) |
| CN106664651A (en) * | 2014-08-08 | 2017-05-10 | 日本电气株式会社 | Communications system with idle mode terminal balancing |
| US10805851B2 (en) | 2014-08-08 | 2020-10-13 | Nec Corporation | Communications system with idle mode terminal balancing |
| CN106664651B (en) * | 2014-08-08 | 2020-11-17 | 日本电气株式会社 | Communication system with idle mode terminal equalization |
| CN104661268A (en) * | 2015-03-16 | 2015-05-27 | 联想(北京)有限公司 | Information processing method, information processing device and mobile terminal |
| CN104661268B (en) * | 2015-03-16 | 2018-06-01 | 联想(北京)有限公司 | Information processing method, information processing unit and mobile terminal |
| CN107969012A (en) * | 2017-11-28 | 2018-04-27 | 广东欧珀移动通信有限公司 | Network Access Method, mobile terminal and computer-readable recording medium |
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