CN101848476A - Method, device and system for realizing self-optimization of switching parameter - Google Patents
Method, device and system for realizing self-optimization of switching parameter Download PDFInfo
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- CN101848476A CN101848476A CN200910080789A CN200910080789A CN101848476A CN 101848476 A CN101848476 A CN 101848476A CN 200910080789 A CN200910080789 A CN 200910080789A CN 200910080789 A CN200910080789 A CN 200910080789A CN 101848476 A CN101848476 A CN 101848476A
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Abstract
The invention relates to a method, a device and a system for realizing self-optimization of a switching parameter. The method comprises the following steps of: acquiring a reestablishment reason for UE to initiate RRC connection reestablishment request and a mark of a source cell of the UE; counting the reported frequency of the cell over the current reestablishment reason; and if the reported frequency is higher than a preset threshold, correspondingly adjusting the switching parameter according to the reestablishment reason. The invention shows that the method, the device and the system can realize self-optimization of the switching parameter, reduce the human intervention of the network planning and the operation and maintenance and lower the establishment cost and the operation cost for the network.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of methods, devices and systems of realizing self-optimization of switching parameter.
Background technology
In mobile communication system, when the UE of connection status (user terminal) when a sub-district moves to another sub-district, or owing to reasons such as wireless transmission, service load quantity adjustment, equipment faults, for the continuity that guarantees that the user serves, network side often needs this user is switched to new sub-district, provides service by new better sub-district for it.
At UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) and LTE (Long Term Evolution, Long Term Evolution) in the system, all be to carry out switch decision according to the mobility measurements report of UE, switch with the select target sub-district by network node:
UE carries out according to measurement control order and measures, and when satisfying report condition, triggers reporting measurement reports; Usually the measurement event of utilizing is: the individual character skew+switching relative threshold of the sub-district individual character skew＞Serving cell measured value+Serving cell of adjacent cell measuring value+adjacent sub-district; When the measured value of adjacent sub-district satisfies following formula condition and duration when reaching the triggered time (time to trigger), trigger to measure reporting, network node triggers handoff procedure after receiving measurement report then; Wherein, the handoff parameter that the influences handoff procedure individual character skew that mainly contains time to trigger, switch relative threshold and Serving cell.
But, improper if handoff parameter is provided with, will increase the UE Radio Link Failure (Radio Link Failure, RLF) or the probability of handoff failure (handover failure), this just need be optimized handoff parameter; And in LTE system Previous System, the setting of handoff parameter all is by manually being provided with, and the optimization of corresponding handoff parameter is also by manually being optimized: concrete, network optimization personnel are by actual drive test, statistical measurements, and measurement result is analyzed the back adjust handoff parameter; But improved the cost of networking and operation greatly by the optimization of manually carrying out handoff parameter, be difficult to satisfy the requirement of operator.Therefore, in LTE and later system, the urgent artificial participation of wishing to reduce by the prioritization scheme that improves handoff parameter the network planning and Operation and Maintenance reduces the construction and the operation cost of network, and does not still improve the ideal scheme of optimizing handoff parameter in the prior art at present.
Summary of the invention
In view of this, the invention provides a kind of methods, devices and systems of realizing self-optimization of switching parameter,, reduce the construction and the operation cost of network to reduce the artificial participation of the network planning and Operation and Maintenance.
For addressing the above problem, technical scheme provided by the invention is as follows:
A kind of method that realizes self-optimization of switching parameter comprises:
Obtain the reconstruction reason and cell-of-origin, the UE place sign that cause UE to initiate the request of RRC connection reconstruction;
Add up the frequency that described sub-district is reported under the current reconstruction reason;
If the described frequency of being reported is higher than predetermined threshold value, then adjust handoff parameter according to rebuilding reason.
Preferably, the described reconstruction that causes UE to initiate the request of RRC connection reconstruction is former because Radio Link Failure.
Preferably, describedly adjust handoff parameter and comprise according to rebuilding reason:
At least execution reduces any one in triggered time, reduction switching relative threshold, the reduction Serving cell individual character offset operation.
Preferably, the described reconstruction that causes UE to initiate the request of RRC connection reconstruction is former because handoff failure.
Preferably, describedly adjust handoff parameter and comprise according to rebuilding reason:
At least execution increases any one in triggered time, raising switching relative threshold, the raising reduction Serving cell individual character offset operation.
Preferably, number of users is proportional in the size of described threshold value and the described sub-district.
A kind of device of realizing self-optimization of switching parameter, this device comprises: receiving element, statistic unit and adjustment unit; Wherein,
Described receiving element is used to obtain the reconstruction reason that causes UE to initiate the request of RRC connection reconstruction and the sign of cell-of-origin, UE place, and notifies described statistic unit;
Described statistic unit is used for the notice according to described receiving element, adds up the frequency that described sub-district is reported under the described reconstruction reason, and notifies described adjustment unit;
Described adjustment unit is used for adjusting handoff parameter according to rebuilding reason when frequency that the described sub-district of described statistic unit statistics is reported is higher than default threshold value.
Preferably, described reconstruction reason comprises Radio Link Failure and handoff failure.
Preferably, described adjustment unit comprises: judge module and processing module; Wherein,
Described judge module is used to judge the frequency that the described sub-district of described statistic unit statistics is reported and the size of described predetermined threshold value, and when the described frequency of being reported during greater than described predetermined threshold value, notifies described processing module;
Described processing module is used for the notice according to described judge module, at least carry out and reduce the triggered time, reduce and switch relative threshold, reduce in the Serving cell individual character offset operation any one, perhaps carry out at least and increase the triggered time, improve and switch relative threshold, improve and reduce in the Serving cell individual character offset operation any one.
A kind of system that realizes self-optimization of switching parameter comprises: base station and Operation and Maintenance platform; Wherein,
Described base station is used to receive the RRC connection reconstruction request that UE initiates, and the reconstruction reason that causes the request of UE initiation RRC connection reconstruction that will comprise in will asking and the sign of cell-of-origin, UE place report described Operation and Maintenance platform;
Described Operation and Maintenance platform is used to receive described reconstruction reason and the described cell ID that the base station reports, and add up the frequency that described sub-district is reported under the current reconstruction reason, if the described frequency of being reported is higher than default threshold value, then adjust handoff parameter according to rebuilding reason.
As can be seen, adopt method of the present invention, device and system, according to of the influence of each handoff parameter to handoff procedure, utilize and initiate RRC (Radio Resource Control, Radio Resource control) the reconstruction reason of connection reconstruction request and cell-of-origin, UE place identify and add up the described heavy frequency that described sub-district is reported under the reason that adds, and itself and default thresholding compared, suitable to determine whether described handoff parameter is provided with, if it is improper, then carry out the adjustment of handoff parameter, thereby influence handoff procedure, and then realized the self-optimizing of handoff parameter, reduce the artificial participation of the network planning and Operation and Maintenance, reduce the construction and the operation cost of network.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of RRC connection reconstruction process;
Fig. 2 is the method flow schematic diagram of the embodiment of the invention 1;
Fig. 3 is the method flow schematic diagram of the embodiment of the invention 2;
Fig. 4 is the method flow schematic diagram of the embodiment of the invention 3;
Fig. 5 is the apparatus structure schematic diagram of the embodiment of the invention 4.
Embodiment
In the LTE system, UE takes place can trigger RRC connection reconstruction process behind Radio Link Failure or the handoff failure at present, as shown in Figure 1, wherein, in RRC connection reconstruction request message, can carry the sign of rebuilding reason and cell-of-origin; If but the handoff parameter setting is improper, might cause too early switching: promptly source base station sends switching command notice UE when Target cell is initiated random access procedure to UE, owing to switch too early, UE distance objective base station is also distant, and cause handoff failure, the reconstruction reason that this moment, UE initiated to carry in the RRC connection reconstruction request message promptly to be designated as handoff failure; Simultaneously, if it is improper that handoff parameter is provided with, also may cause switching late: reaching to UE that promptly base station is not also come sends switching command, UE also has little time in the cell-of-origin to switch RLF has promptly taken place, this moment, the reconstruction reason of carrying in the RRC connection reconstruction request message promptly was designated as RLF when carrying out the RRC connection reconstruction in the another one sub-district.
Therefore, adjust the described handoff parameter be provided with promptly corresponding adjust handoff procedure too early or slow excessively: as reducing the size of time to trigger value, perhaps reduce and switch relative threshold, perhaps reduce the individual character skew of Serving cell, will be more early triggering measurement report, thereby triggering handoff procedure more early; Opposite these handover parameter values that increase then can be postponed the triggering of handoff procedure.
At above-mentioned analysis, the basic thought of the realization self-optimization of switching parameter that the present invention proposes is according to the influence of each handoff parameter to handoff procedure, utilize the information of carrying in the RRC connection reconstruction request message to adjust handoff parameter, concrete mainly is to adjust handoff parameter according to the reconstruction reason of carrying in the RRC connection reconstruction request message, to influence handoff procedure, thereby realized the self-optimizing of handoff parameter, and then the artificial participation of the minimizing network planning and Operation and Maintenance, the construction and the operation cost of reduction network.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described; Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention 1 provides a kind of method that realizes self-optimization of switching parameter, and as shown in Figure 2, this method comprises:
In step 201, obtain the sign that UE initiates RRC connection reconstruction reason and cell-of-origin, UE place;
Concrete, when UE initiates the request of RRC connection reconstruction, can send RRC connection reconstruction request message to the base station, can comprise the cell-of-origin sign of rebuilding reason and UE place in this request message; And after the base station receives RRC connection reconstruction request message, give network equipment with reconstruction reason in this request message and cell-of-origin Identify Report, network equipment is with Operation and Maintenance (O﹠amp in the present embodiment; M) platform is an example, but is not limited to this; It should be noted that described in embodiments of the present invention reconstruction reason includes but not limited to Radio Link Failure and handoff failure; Wherein, if handoff parameter is provided with the improper too early switching that causes, then source base station sends switching command notice UE when Target cell is initiated random access procedure to UE, owing to switch too early, thereby and the also distant handoff failure that causes in UE distance objective base station, this moment described reconstruction reason promptly be designated as handoff failure; And if that handoff parameter is provided with is improper, caused switching late, then the base station also do not come and to UE transmission switching command, RLF has taken place in UE when also not switching, described reconstruction reason promptly is designated as RLF at this moment;
In step 202, add up the frequency that described sub-district is reported under the current reconstruction reason; With the Operation and Maintenance platform is example, after the described reconstruction reason and cell ID that receive the base station report, add up the frequency that the cell-of-origin at UE place under the current reconstruction reason is reported, because of just saying the cell-of-origin with respect to UE, and do not distinguish so-called cell-of-origin and Target cell for network equipment, just add up the frequency that the sub-district is reported under the described reconstruction reason, but in fact, the sub-district that add up this moment and the cell-of-origin at UE place are same sub-district, these those skilled in the art should readily understand, not repeat them here; Wherein, the Radio Link Failure if described reconstruction is former, the then frequency that described sub-district is reported under the no circuit failure scenarios of Operation and Maintenance platform statistics; The handoff failure if described reconstruction is former, the then frequency that described sub-district is reported under the Operation and Maintenance platform statistics failed handoff scenario;
In step 203, when the described frequency of being reported is higher than default threshold value, adjust handoff parameter according to rebuilding reason; If the described frequency of being reported is not higher than described threshold value, can think that then the setting of current handoff parameter is in normal situation, do not adjust, this paper does not do detailed description;
Concrete, described report frequency refers to times of reporting in the unit interval, promptly in the current reconstruction following unit interval of reason described sub-district by times of reporting; Wherein, if cell load is than higher, number of users is many, then report the number of times sub-district light just many with respect to load, the report frequency is just high, therefore but it is improper that the handoff parameter of not representing this sub-district is provided with, and a threshold value need be set be used for whether described to report frequency to compare with the setting of determining described handoff parameter suitable; It should be noted that, the size of described threshold value and number of users are the relations of direct ratio, and the size of threshold value can be considered factors such as excited user number in the sub-district or edge customer number, certainly, those skilled in the art also readily understand, actual conditions when the setting of this threshold value also can be according to concrete implement specifically are provided with, and do not repeat them here;
Owing to described reconstruction reason has multiple situation, therefore follow-up adjustment for handoff parameter also will be carried out accordingly according to concrete reconstruction reason; For example, the Radio Link Failure if current reconstruction is former, then it might be to be provided with due to improper caused mistake switches late by handoff parameter, in such cases, when described by the report frequency when being higher than described threshold value, it is slow to show that then this sub-district UE switched, and the handoff parameter adjustment of carrying out this moment can be to reduce time to trigger or reduce to switch relative threshold or reduce Serving cell individual character skew etc.; Again for example, the handoff failure if current reconstruction is former, then it might be to be provided with due to the improper caused too early switching by handoff parameter, in such cases, when described by the report frequency when being higher than described threshold value, show that then this sub-district UE switches too early, the adjustment of the handoff parameter that carry out this moment can be to increase time to trigger or improve to switch relative threshold or improve Serving cell individual character skew etc.; Certainly, the adjustment of handoff parameter also can comprehensively be carried out in above-mentioned two examples: promptly when rebuilding former because during Radio Link Failure, carry out at least and reduce time to trigger, reduce and switch relative threshold, reduce any one operation in the skew of Serving cell individual character; , carry out at least and increase time to trigger, improve and switch relative threshold, increase any one operation in the skew of Serving cell individual character because during handoff failure when rebuilding former.
The method of the invention described above embodiment, focus on adjusting handoff parameter qualitatively to realize the self-optimizing of handoff parameter according to rebuilding reason, qualitative adjustment during as for concrete enforcement, those skilled in the art understand easily, on the basis of above-mentioned qualitative adjustment, specifically can carry out, not repeat them here according to actual conditions.
Below by concrete reconstruction reason the foregoing description is realized that the method for self-optimization of switching parameter is described in detail, embodiment 2 as shown in Figure 3, being designated as Radio Link Failure with the reconstruction reason is example:
If handoff parameter is provided with improper, can cause switching late, UE has little time in the cell-of-origin to switch and RLF takes place, at this moment,
In step S301, UE initiates the request of RRC connection reconstruction to the base station;
In step S302, the base station receives UE because the RRC connection reconstruction request message that RLF initiated has comprised the reconstruction reason and the cell-of-origin sign that are designated as RLF in this request message;
In step S303, O﹠amp is given with reconstruction reason in the described request message and cell-of-origin Identify Report in the base station; M;
In step S304, O﹠amp; The frequency that described sub-district is reported under the M statistics RLF reason;
In step S305, judge described by the report frequency whether be higher than default threshold value, if it is slow to show that then this sub-district UE switched, execution in step S306; Otherwise, disregard;
In step S306, O﹠amp; M adjusts handoff parameter by at least one the operation that execution reduces in time to trigger, reduction switching relative threshold, the reduction Serving cell individual character offset operation, realizes the self-optimizing of handoff parameter.
Embodiment 3 as shown in Figure 4, being designated as handoff failure with the reconstruction reason is example:
If handoff parameter is provided with improper, can cause too early switching, source base station sends switching command to UE, and UE initiates random access procedure to Target cell, owing to switch too early, UE distance objective base station is also distant, thereby causes handoff failure, at this moment,
In step S401, UE can initiate the RRC connection reconstruction request of handoff failure to the base station;
In step S402, the base station receives UE because the RRC connection reconstruction request message that handoff failure is initiated has comprised the reconstruction reason and the cell-of-origin sign that are designated as handoff failure in this request message;
In step S403, O﹠amp is given with reconstruction reason in the described request message and cell-of-origin Identify Report in the base station; M;
In step S404, O﹠amp; The frequency that described sub-district is reported under the M statistics handoff failure reason;
In step S405, judge describedly whether be higher than default threshold value, if show that then this sub-district UE switches too early execution in step S406 by the report frequency; Otherwise, disregard;
In step S406, O﹠amp; M adjusts handoff parameter by carrying out at least one the operation that increases in time to trigger, raising switching relative threshold, the raising Serving cell individual character offset operation, realizes the self-optimizing of handoff parameter.
As can be seen, adopt the method for the embodiment of the invention, according to of the influence of each handoff parameter to handoff procedure, utilize the reconstruction reason of carrying in the RRC connection reconstruction request message to adjust handoff parameter, to influence handoff procedure, thereby realized the self-optimizing of handoff parameter, and then reduced the artificial participation of the network planning and Operation and Maintenance, reduced the construction and the operation cost of network.
Based on above-mentioned thought, the embodiment of the invention 4 has proposed a kind of device of realizing self-optimization of switching parameter again, and as shown in Figure 5, this device 500 comprises: receiving element 510, statistic unit 520 and adjustment unit 530; Wherein,
Described receiving element 510 is used to obtain the reconstruction reason that causes UE to initiate the request of RRC connection reconstruction and the sign of cell-of-origin, UE place, and notifies described statistic unit 520;
Described statistic unit 520 is used for the notice according to described receiving element 510, adds up the frequency that described sub-district is reported under the described reconstruction reason, and notifies described adjustment unit 530;
Described adjustment unit 530 is used for when frequency that the described sub-district of described statistic unit 520 statistics is reported is higher than default threshold value, according to rebuilding the corresponding adjustment handoff parameter of reason.
Wherein, described reconstruction reason comprises Radio Link Failure and handoff failure.
During concrete enforcement, the preferred described adjustment unit 530 of situation comprises: judge module 531 and processing module 532; Wherein, described judge module 531 is used to judge the frequency that the described sub-district of described statistic unit 520 statistics is reported and the size of described predetermined threshold value, and when the described frequency of being reported during greater than described predetermined threshold value, notifies described processing module 532; Described processing module 532 is used for the notice according to described judge module 531, at least carry out and reduce the triggered time, reduce and switch relative threshold, reduce in the Serving cell individual character offset operation any one, perhaps carry out at least and increase the triggered time, improve and switch relative threshold, improve and reduce in the Serving cell individual character offset operation any one.
In addition, the embodiment of the invention 5 has also proposed a kind of system that realizes self-optimization of switching parameter, and this system comprises: base station and Operation and Maintenance platform; Wherein,
Described base station except the function that possesses existing base station and have and with the annexation of other devices, also should receive the RRC connection reconstruction request that UE initiates, and the reconstruction reason that causes the request of UE initiation RRC connection reconstruction that will comprise in will asking and the sign of cell-of-origin, UE place report described Operation and Maintenance platform;
Described Operation and Maintenance platform is used to receive described reconstruction reason and the described cell ID that the base station reports, and add up the frequency that described sub-district is reported under the current reconstruction reason, if the described frequency of being reported is higher than default threshold value, then according to rebuilding the corresponding adjustment handoff parameter of reason; Concrete, Operation and Maintenance platform in the present embodiment is identical in fact with device in the foregoing description 4, also can possess the foregoing description included but the receiving element 510, statistic unit 520 and the adjustment unit 530 that are not limited to, and annexation between each unit and the function that is realized also with the foregoing description in device described consistent, do not repeat them here.
It will be understood by those skilled in the art that and to use many different technologies and in the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
The professional can also further should be able to recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method that realizes self-optimization of switching parameter is characterized in that, comprising:
Obtain the reconstruction reason that causes UE to initiate the request of RRC connection reconstruction and the sign of cell-of-origin, UE place;
Add up the frequency that described sub-district is reported under the current reconstruction reason;
If the described frequency of being reported is higher than predetermined threshold value, then adjust handoff parameter according to rebuilding reason.
2. method according to claim 1 is characterized in that:
The described reconstruction that causes UE to initiate the request of RRC connection reconstruction is former because Radio Link Failure.
3. method according to claim 2 is characterized in that, describedly adjusts handoff parameter and comprises according to rebuilding reason:
At least execution reduces any one in triggered time, reduction switching relative threshold, the reduction Serving cell individual character offset operation.
4. method according to claim 1 is characterized in that:
The described reconstruction that causes UE to initiate the request of RRC connection reconstruction is former because handoff failure.
5. method according to claim 4 is characterized in that, describedly adjusts handoff parameter and comprises according to rebuilding reason:
At least execution increases any one in triggered time, raising switching relative threshold, the raising reduction Serving cell individual character offset operation.
6. according to claim 3 or 5 any described methods, it is characterized in that:
Number of users is proportional in the size of described threshold value and the described sub-district.
7. a device of realizing self-optimization of switching parameter is characterized in that, this device comprises: receiving element, statistic unit and adjustment unit; Wherein,
Described receiving element is used to obtain the reconstruction reason that causes UE to initiate the request of RRC connection reconstruction and the sign of cell-of-origin, UE place, and notifies described statistic unit;
Described statistic unit is used for the notice according to described receiving element, adds up the frequency that described sub-district is reported under the described reconstruction reason, and notifies described adjustment unit;
Described adjustment unit is used for adjusting handoff parameter according to rebuilding reason when frequency that the described sub-district of described statistic unit statistics is reported is higher than default threshold value.
8. device according to claim 7 is characterized in that:
Described reconstruction reason comprises Radio Link Failure and handoff failure.
9. device according to claim 8 is characterized in that, described adjustment unit comprises: judge module and processing module; Wherein,
Described judge module is used to judge the frequency that the described sub-district of described statistic unit statistics is reported and the size of described predetermined threshold value, and when the described frequency of being reported during greater than described predetermined threshold value, notifies described processing module;
Described processing module is used for the notice according to described judge module, at least carry out and reduce the triggered time, reduce and switch relative threshold, reduce in the Serving cell individual character offset operation any one, perhaps carry out at least and increase the triggered time, improve and switch relative threshold, improve and reduce in the Serving cell individual character offset operation any one.
10. a system that realizes self-optimization of switching parameter is characterized in that, comprising: base station and Operation and Maintenance platform; Wherein,
Described base station is used to receive the RRC connection reconstruction request that UE initiates, and the reconstruction reason that causes the request of UE initiation RRC connection reconstruction that will comprise in will asking and the sign of cell-of-origin, UE place report described Operation and Maintenance platform;
Described Operation and Maintenance platform is used to receive described reconstruction reason and the described cell ID that the base station reports, and add up the frequency that described sub-district is reported under the current reconstruction reason, if the described frequency of being reported is higher than default threshold value, then adjust handoff parameter according to rebuilding reason.
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