CN103379571B - Method for handover control, Apparatus and system - Google Patents
Method for handover control, Apparatus and system Download PDFInfo
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Abstract
Embodiments of the invention provide a kind of method for handover control, Apparatus and system, it relates to communication technical field, and the method comprises: determine multiple candidate user devices UE; Determine to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, each region of this community described is by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, according to predetermined angle this community divided equally and obtain. The present invention can effectively reduce the congested degree of community, and improves the success ratio of switching.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method for handover control, Apparatus and system.
Background technology
UMTS (UniversalMobileTelecomSystem) radio communication system is widely deployed in worldwide. In order to provide the information of faster greater amount to transmit, telecom industry servers are developing existing network. Such as, UMTS system is further developed into so-called evolution UMTS Terrestrial Radio Access Network, also referred to as LTE radio communication system or 3.9G system. This system, by raising the efficiency, reduces costs, and exploitation service, utilizes new spectrum opportunities, and the means such as integrated are upgraded technology relatively early with other standard better.
In LTE, the framework of wireless network system is from not only support circuit-switched but also supports that packet switching develops into the system of a pure IP, pure packet switching. The framework of whole eUTRAN (evolvedUMTSTerrestrialRadioAccessNetwork) and its core network become simpler, both combines formation EPS (EvolvedPacketSystem), is also called SAE (SystemArchitectureEvolution).
In current LTE, basic framework comprises a wireless access network (eUTRAN), and it connects multiple UE (UserEquipment, user equipment) and multiple access node as a base station, simultaneously mutual with core net. EUTRAN accesses node and is called as eNodeB or eNB. In eUTRAN, eNB is exclusive node type, and the cordless communication network before comparing which simplify framework. The core net that eNB connects in LTE is called EPC (EvolvedPacketCore).
In the EPS being made up of eUTRAN and EPC, there is the restriction in certain operations, comprise physical restriction, such as device-restrictive, frequency assignation, power limit, base station is settled, antenna configuration, noise, environmental factors etc. In addition, the restriction in these operations also may derive from the irrational configuration of system. Based mobile communication equipment supplier can provide Radio Resource management (RRM, RadioResourceManagement) characteristic in the equipment supplied. This kind of radio management characteristic can regulate the congestion problems alleviated in EPS and cause because data volume, signaling amount and number of users are excessive. Congested in EPS comprises two aspects: one is the congested of eUTRAN wireless access mesh portions, and two is the congested of EPC core net part. In wireless access mesh portions, owing to user too much in same community and service access are on same eNB, competition takies the limited resources that this eNodeB has, thus causes the PRB in this community (PhysicalResourceBlock) shortage and cannot ensure the QoS (QualityofService) of business.
In prior art, congested in order to avoid in community, a kind of conventional method is: the base station in cell-of-origin judges that whether signal power that UE is sent to base station in this cell-of-origin is lower than a certain threshold value, if the signal power of UE is sent in cell-of-origin base station is lower than a certain threshold value, then UE is switched to target community, to reach the load reducing cell-of-origin, and then reduce the object of the congested degree of cell-of-origin. But, adopt the method, if the signal power of UE is sent in cell-of-origin base station is not lower than threshold value, even if under described cell-of-origin is in congested state, UE also cannot be switched to target community, thus also just cannot reduce the load of cell-of-origin, the congested degree of cell-of-origin cannot be reduced.
Another kind of conventional method is: carry out load information exchange between base station, selects UE to switch by load balancing. But, adopting the method to need between base station, to possess load information and exchange interface, exchange the system of interface for lacking load information between base station, this kind of method is not suitable for. If still adopting the method, then causing in handoff procedure, multiple UE is likely switched to same adjacent area by cell-of-origin, the load of this adjacent area is caused to increase suddenly, making part UE handoff failure, the success ratio of switching is lower, and then also cannot effectively reduce the congested degree of cell-of-origin.
Summary of the invention
Embodiments of the invention provide a kind of method for handover control, Apparatus and system, it is possible to effectively reduce the congested degree of community, and improve the success ratio of switching.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method for handover control, comprising:
Determine multiple candidate user devices UE;
Determine to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, each region of this community described is by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, according to predetermined angle this community divided equally and obtain.
A kind of switching control device, comprising:
Determination module, for determining multiple candidate user devices UE;
Control module, for determining to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, this community, by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, is divided equally according to predetermined angle and is obtained by each region of this community described.
A kind of handover control system, comprises above-mentioned switching control device and multiple user equipment (UE).
By in the embodiment of the present invention described by technique scheme, from described multiple candidate UE, determine that the dispersity needing the multiple object UE carrying out cell merge to form is maximum, that is, the degree of uniformity that multiple object UE is distributed in each region of this community is higher, thus, can effectively reduce the probability that the plurality of object UE is switched to identical adjacent area, the UE avoided in prior art Zhong Huijiangzhe community is switched to same adjacent area and causes the load of this adjacent area to increase suddenly, cause part UE handoff failure, the problem of this small area jam degree cannot be effectively reduced.
Compared with prior art, technical scheme provided by the invention is when community is in congested state, it is possible to effectively reduces the congested degree of community, and improves the success ratio of switching; When not being in congested state in community, it is also possible to the UE in community is carried out switching control, to prevent community to enter congested state.
Further, technical scheme provided by the invention does not need to possess load information between base station and exchanges interface, thus, exchanges the communication system of interface for lacking load information between base station, such as, based on the communication system of X2 interface information interaction, it is also possible to be suitable for.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schema of a kind of method for handover control that Fig. 1 provides for the embodiment of the present invention 1;
The schematic diagram in the region, a kind of average division of cells that Fig. 2 provides for the embodiment of the present invention 1;
The schema of step 101 in a kind of method for handover control that Fig. 3 provides for the embodiment of the present invention 1;
Fig. 4 provides the embodiment schema realizing method for handover control of 1 offer for the present invention;
Fig. 5 provides another embodiment schema realizing method for handover control of 1 offer for the present invention;
Fig. 6 provides the structure iron of a kind of switching control device for the embodiment of the present invention 2;
Fig. 7 provides the structure iron of determination module in a kind of switching control device for the embodiment of the present invention 2;
Fig. 8 provides the structure iron of another kind of switching control device for the embodiment of the present invention 2;
Fig. 9 provides the structure iron of control module in a kind of switching control device for the embodiment of the present invention 2;
Figure 10 provides the structure iron of another switching control device for the embodiment of the present invention 2;
Figure 11 provides the structure iron of another switching control device for the embodiment of the present invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
The embodiment of the present invention provides a kind of method for handover control, and as shown in Figure 1, the method can be performed by base station, and this base station includes but not limited to the NodeB etc. in eNodeB or eNB in LTE system, cdma system. The method comprises:
101, multiple candidate user devices UE is determined.
Exemplary, multiple candidate UE is determined in the base station of this community from each UE of this community.
102, determine to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, each region of this community described is by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, according to predetermined angle this community divided equally and obtain.
It should be noted that, this community is divided equally obtain each region time, can divide equally with reference to the adjacent area number of this community. Such as, when the adjacent area number of a community is 6, Ze Jianggai community is divided into 6 regions, certainly, it is also possible to this community being divided into multiple number or other numbers of adjacent area number, such as, this community is divided into 12 regions etc., this is not restricted.
In theory, the adjacent area number of a community is generally 6. Especially, hereinafter for the adjacent area number of a community as the explanation carrying out a kind of method for handover control when 6.
Exemplary, as shown in Figure 2, the schematic diagram in the region, a kind of average division of cells that the embodiment of the present invention provides, wherein, taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, starting with geographical direct north, this community is divided equally according to predetermined angle (60 ��) and is obtained region 1, region 2 ... region 6 by (or counter clockwise direction) along clockwise direction.
It should be noted that, all corresponding 2 adjacent areas, each region that above-mentioned Fig. 2 divides so that UE is when switching, and selectable adjacent area can be more some more.
In LTE system, can judge which region the UE of this community is specifically arranged according to AoA (AngleofArrival) value. The base station of this community can obtain the AoA value of UE from the uplink channel of UE. Wherein, AoA value is fleet angle angle value with reference direction after turning clockwise along reference direction, and reference direction is geographical positive north. Owing to when this community is carried out Region dividing, also dividing from geographical direct north, thus, after the base station of this community obtains the AoA value of UE, can know which region UE is specifically arranged in.
It should be noted that, the dispersity that UE is formed can represent and isWherein, P is the number in region, NkRepresenting the number of UE in kth region, 1��k��P, M is the mean number of UE in each region. Visible, when the dispersity that UE is formed is more big, the degree of uniformity that UE is distributed in each region of this community is more high.
In the embodiment of the present invention, from described multiple candidate UE, determine that the dispersity needing the multiple object UE carrying out cell merge to form is maximum, that is, the degree of uniformity that multiple object UE is distributed in each region of this community is higher, thus, can effectively reduce the probability that the plurality of object UE is switched to identical adjacent area, the UE avoided in prior art Zhong Huijiangzhe community is switched to same adjacent area and causes the load of this adjacent area to increase suddenly, cause part UE handoff failure, the problem of this small area jam degree cannot be effectively reduced.
Compared with prior art, technical scheme provided by the invention is when community is in congested state, it is possible to effectively reduces the congested degree of community, and improves the success ratio of switching; When not being in congested state in community, it is also possible to the UE in community is carried out switching control, to prevent community to enter congested state.
Further, technical scheme provided by the invention does not need to possess load information between base station and exchanges interface, thus, exchanges the communication system of interface for lacking load information between base station, such as, based on the communication system of X2 interface information interaction, it is also possible to be suitable for.
Further, as shown in Figure 3, in above-mentioned steps 101, it is determined that multiple candidate user devices UE can realize in the following way:
101-1, the signal measurements receiving each UE and sending, described signal measurements is the signal measurements obtained after this community is carried out signal measurement by UE, and described signal measurements is more little, more far away for the distance represented between the base station of described UE and this community described;
Optionally, in LTE system, described signal measurements is the RSRP observed value that this community is carried out obtaining after RSRP (LTEReferenceSignalReceivedPower, Reference Signal Received Power) measures by UE. This RSRP observed value is the linear average of the signal power obtained after the RS (ReferenceSignal, reference signal) of the some REs (ResourceElement) from base station is measured by UE.
When the base station of UE distance community is more near, the RSRP observed value of this community that this UE records is more big, otherwise, when the base station of UE distance community is more far away, the RSRP observed value of this community that this UE records is more little. Thus, by comparing the size of this RSRP observed value, it is possible to learn the distance of the spacing of UE and community.
101-2, UE corresponding for all signal measurements being less than predetermined threshold value is defined as candidate UE.
Wherein, it is less than the UE that all signal measurements of predetermined threshold value are corresponding, refers to the UE being positioned at this cell edge. Due to UE be positioned at this cell edge time, the success ratio being switched to other adjacent areas is higher, thus, chooses the UE alternatively UE being positioned at this cell edge herein, it is possible to improve switching success ratio.
Specifically, it is possible to after UE corresponding for all RSRP observed values being less than predetermined threshold value is arranged from small to large according to RSRP observed value, be kept in a handoff list.
As shown in Figure 4, the embodiment realizing method for handover control provided by the invention, the method is performed by the base station of this community, and the method comprises:
201, multiple candidate user devices UE is determined.
The implementation that this step adopts is identical with the implementation in above-mentioned steps 101, does not repeat them here.
202, the load calculating this community is from when currently value drops to target value, it is necessary to the PRB sum K1 of release, and wherein, described target value is make this community described be in the load value of non-congested state Shi Zhe community.
203, the PRB sum K2 that described multiple candidate UE takies is calculated.
204, determine to need the multiple object UE carrying out cell merge from described multiple candidate UE.
Specifically, this step can be divided into following sub-step to perform:
204-1, as K1 >=K2, described multiple candidate UE all is defined as needing carrying out the object UE of cell merge.
Wherein, as K1 >=K2, illustrate after described multiple candidate UE is all switched to adjacent area, the PRB sum discharged also cannot meet the load of this community from when currently value drops to target value, need the PRB sum K1 of release, thus, described multiple candidate UE all is defined as needing carrying out the object UE of cell merge, to carry out cell merge, alleviate the congested situation of this community to the full extent.
204-2, as K1 < K2, candidate UE minimum for signal measurements in described multiple candidate UE is defined as first aim UE, and start with described first aim UE region, in each region of this community, determine to be arranged in the minimum candidate UE of the signal measurements of one's respective area successively as object UE according to clock-wise order or sequence counter-clockwise, until described in the PRB sum that need to take of each object UE of determining equal K1.
Wherein, as K1 < K2, illustrate after described multiple candidate UE is all switched to adjacent area, the PRB sum discharged has exceeded the load of this community from when currently value drops to target value, need the PRB sum K1 of release, thus, part candidate UE (the PRB sum that described part candidate UE need to take equals K1) in described multiple candidate UE is defined as the object UE needing to carry out cell merge, the load of this community can be made to drop to target value from current value, thus reduce the congested degree of this community.
Wherein, in each region of this community, determine to be arranged in the minimum candidate UE of the signal measurements of one's respective area successively as object UE according to clock-wise order or sequence counter-clockwise, can guarantee that object UE is evenly distributed in each region as far as possible, with the success ratio of object UE switching.
205, switching command is sent to described multiple object UE, to indicate described multiple object UE to be switched to target adjacent area selected separately.
It should be noted that, the base station of this community sends the target adjacent area information can not carried described object UE in switching command and need to be switched to described multiple object UE. But, receive the switching command of base station transmission of this community by each object UE after, select a good adjacent area of signal quality to switch voluntarily.
As shown in Figure 5, another embodiment realizing method for handover control provided by the invention, the method is performed by the base station of this community, and the method comprises:
301, multiple candidate user devices UE is determined.
The implementation that this step adopts is identical with the implementation in above-mentioned steps 101, does not repeat them here.
302, determine to need the multiple object UE carrying out cell merge from described multiple candidate UE.
Specifically, this step can be divided into following sub-step to perform:
S1, the number R determining object UE, R are positive integer.
Exemplarily, 1/3 of the UE sum in Ke Jiangzhe community is the number R of object UE. Such as, the UE sum of this community is 32, then can determine that the number R of object UE is 12. That is from 32 UE, choose 12 UE carry out cell merge.
S2, respectively the initial value of position pointer counter N is set to 1, the initial value of general counter M is set to 0, the initial value of cycle index counter P is set to 1, and choose S candidate UE from described multiple candidate UE, described S candidate UE comprises: front S the candidate UE after arranging according to signal measurements ascending order, wherein, R > S > R/2, S is positive integer.
Such as, when the number R determining object UE is 12, this step can choose 10 candidate UE from described multiple candidate UE, and is left in first handoff list by select 10 candidate UE, so that follow-up, candidate UE is carried out selection process.
Hereinafter it is described to determine the number R of object UE as 12.
Whether S3, to judge rank identical with the region of rank in each candidate UE region of top N in the candidate UE region of N+1 position.
Such as, when first time performs this step, owing to the initial value of N is 1, then specifically judge that whether rank is identical with the region of rank in each candidate UE region of the 1st the candidate UE region of the 2nd.
If when performing this step, the value of N changes (see step S4-2), such as, increase 3, so specifically judge that whether rank is identical with the region of rank in each candidate UE region of first 3 the candidate UE region of the 4th.
If S4-1 is identical, being then move rank after the candidate UE of N+1 position on S position, and be that the candidate UE to the candidate UE of S position of N+2 position moves forward one successively by former rank, meanwhile, the value of general counter M adds 1.
Such as, if when performing this step, when the value of N is 1, it is move rank after the candidate UE of the 2nd on the 10th so specifically, and it is that the candidate UE to the candidate UE of the 10th of the 3rd moves forward one successively by former rank.
If S4-2 is not identical, then value by position pointer counter N adds 1.
S5, judge whether the value of position pointer counter N equals R/2, or, whether the value of general counter M equals S-R/2.
Such as, specifically judge whether the value of position pointer counter N equals 6, or, whether the value of general counter M equals 4.
S6-1, when the value of position pointer counter N is not equal to R/2, and, when the value of general counter M is not equal to S-R/2, jumps to S3 and continue to perform downwards.
S6-2, when the value of position pointer counter N equals R/2, or, when the value of general counter M equals S-R/2, rank is defined as object UE at the candidate UE of front R/2 position.
Such as, specifically, when P value is 1, in the candidate UE sequence that above-mentioned first handoff list obtains after above-mentioned steps S1-S7 processes, the candidate UE choosing first 6 is as object UE.
S7, judge whether the value of cycle index counter P equals 2.
S8-1, when the value of cycle index counter P is not equal to 2, value by position pointer counter N resets to initial value respectively, the value of general counter M is reset to initial value, the value of cycle index counter P is added 1, and, again S candidate UE is chosen, and jump to S3 and continue to perform downwards, wherein, described S the candidate UE again chosen comprises: the candidate UE of rank posterior S-R/2 position and choose front R/2 the candidate UE after arranging according to signal measurements ascending order from the candidate UE except front S candidate UE in front S position candidate UE.
Such as, during the candidate UE specifically obtained after above-mentioned steps S1-S7 processes in above-mentioned first handoff list sorts, choose the candidate UE of posterior 4 of rank in front 10 candidate UE and from the candidate UE except front 10 candidate UE, choose front 6 the candidate UE after arranging according to signal measurements ascending order, form 10 the candidate UE newly chosen, described 10 the candidate UE newly chosen, it is possible to be kept in the 2nd handoff list.
Continue to perform downwards when jumping to S3 from this step, and perform to S6-2 time, in the candidate UE sequence that above-mentioned 2nd handoff list obtains after above-mentioned steps S3-S6 processes, the candidate UE choosing first 6 is as object UE.
S8-2, when the value of cycle index counter P equals 2, terminate to determine the operation of object UE.
303, switching command is sent to described multiple object UE, to indicate described multiple object UE to be switched to target adjacent area selected separately.
The specific implementation of this step see the associated description in above-mentioned steps 205, can not repeat them here.
It should be noted that, in the present embodiment, 12 object UE are chosen for needs, in conjunction with distribution situation in the region of this community of the Distance geometry of UE and this cell base station, select to obtain 12 object UE by twice circulation, choosing 6 object UE, order of trying one's best is chosen 6 UE and is dropped in different regions, to improve the dispersity of UE every time. Considering, if candidate UE existing at least 12 UE be arranged in different regions, then, when choosing 6 UE from 10, can be ensured that by present method front 6 UE every time selected are arranged in different regions every time. In addition, the maximum computing amount that the method produces when single computing is very little, is 18 ((6+4-1) * 2), thus can not produce bigger computing overhead.
Embodiment 2:
As shown in Figure 6, the embodiment of the present invention provides a kind of switching control device, comprising:
Determination module 11, for determining multiple candidate user devices UE;
Control module 12, for determining to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, this community, by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, is divided equally according to predetermined angle and is obtained by each region of this community described.
The device that the embodiment of the present invention provides, from described multiple candidate UE, determine that the dispersity needing the multiple object UE carrying out cell merge to form is maximum, that is, the degree of uniformity that multiple object UE is distributed in each region of this community is higher, thus, can effectively reduce the probability that the plurality of object UE is switched to identical adjacent area, the UE avoided in prior art Zhong Huijiangzhe community is switched to same adjacent area and causes the load of this adjacent area to increase suddenly, cause part UE handoff failure, the problem of this small area jam degree cannot be effectively reduced.
Compared with prior art, technical scheme provided by the invention is when community is in congested state, it is possible to effectively reduces the congested degree of community, and improves the success ratio of switching; When not being in congested state in community, it is also possible to the UE in community is carried out switching control, to prevent community to enter congested state.
Further, technical scheme provided by the invention does not need to possess load information between base station and exchanges interface, thus, exchanges the communication system of interface for lacking load information between base station, such as, based on the communication system of X2 interface information interaction, it is also possible to be suitable for.
It should be noted that, this device is the base station in community.
Specifically, signal measurements is Reference Signal Received Power RSRP observed value.
Further, as shown in Figure 7, described determination module 11 comprises:
Receive unit 11-1, for receiving the signal measurements that each UE sends, described signal measurements is the signal measurements obtained after this community is carried out signal measurement by UE, and described signal measurements is more little, more far away for the distance represented between the base station of described UE and this community described;
Determining unit 11-2, for being defined as candidate UE by UE corresponding for all signal measurements being less than predetermined threshold value.
Further, as shown in Figure 8, this device also comprises:
Calculating module 13, when dropping to target value for calculating the load of this community from current value, it is necessary to the PRB sum K1 of release, wherein, described target value is make this community described be in the load value of non-congested state Shi Zhe community;
Described calculating module 13, also for calculating the PRB sum K2 that described multiple candidate UE takies.
Optionally, described control module 12 specifically for as K1 >=K2, all being defined as needing carrying out the object UE of cell merge by described multiple candidate UE;
Described control module 12, also specifically for as K1 < K2, candidate UE minimum for signal measurements in described multiple candidate UE is defined as first aim UE, and start with described first aim UE region, in each region of this community, determine to be arranged in the minimum candidate UE of the signal measurements of one's respective area successively as object UE according to clock-wise order or sequence counter-clockwise, until described in the PRB sum that need to take of each object UE of determining equal K1.
Optionally, as shown in Figure 9, described control module 12 comprises:
Determining unit 12-1, for determining the number R of object UE, R is positive integer;
Setting unit 12-2, for respectively the initial value of position pointer counter N being set to 1, is set to 0 by the initial value of general counter M, and the initial value of cycle index counter P is set to 1;
Selection unit 12-3, for choosing S candidate UE from described multiple candidate UE, described S candidate UE comprises: front S the candidate UE after arranging according to signal measurements ascending order, wherein, R > S > R/2, S is positive integer;
First judging unit 12-4, for judging that whether rank is identical with the region of rank in each candidate UE region of top N in the candidate UE region of N+1 position;
First processing unit 12-5, for when the result that described first judging unit draws is identical, then it is move rank after the candidate UE of N+1 position on S position, and it is that the candidate UE to the candidate UE of S position of N+2 position moves forward one successively by former rank, meanwhile, the value of general counter M adds 1;
Described first processing unit 12-5, also for when the result that described first judging unit draws is not identical, then value by position pointer counter N adds 1;
Whether the 2nd judging unit 12-6, equal R/2 for judging the value of position pointer counter N, or, whether the value of general counter M equals S-R/2;
2nd processing unit 12-7, for when described 2nd judging unit judges that the value of position pointer counter N is not equal to R/2, and, when the value of general counter M is not equal to S-R/2, instruction continues downward execution from described first judging unit;
Object UE determining unit 12-8, for when described 2nd judging unit judges that the value of position pointer counter N equals R/2, or, when the value of general counter M equals S-R/2, rank is defined as object UE at the candidate UE of front R/2 position;
Whether the 3rd judging unit 12-9, equal 2 for judging the value of cycle index counter P;
3rd processing unit 12-10, for when the value of cycle index counter P is not equal to 2, value by position pointer counter N resets to initial value respectively, the value of general counter M is reset to initial value, the value of cycle index counter P is added 1, and, again S candidate UE is chosen, and indicate and continue downward execution from described first judging unit, wherein, described S the candidate UE again chosen comprises: the candidate UE of rank posterior S-R/2 position and choose front R/2 the candidate UE after arranging according to signal measurements ascending order from the candidate UE except front S candidate UE in front S position candidate UE,
End unit 12-11, for when the value of cycle index counter P equals 2, terminating to determine the operation of object UE.
Further, as shown in either of figures 10 or 11, also comprise:
Sending module 14, for sending switching command to described multiple object UE, to indicate described multiple object UE to be switched to target adjacent area selected separately.
Each function module or the specific implementation of unit in said apparatus see the associated description in the corresponding step of method in embodiment 1, can not repeat them here.
Correspondingly, the embodiment of the present invention also provides a kind of handover control system, comprises above-mentioned switching control device and multiple user equipment (UE).
Through the above description of the embodiments, the technician of art can be well understood to the present invention and can realize by the mode that software adds required general hardware, naturally it is also possible to by hardware, but in a lot of situation, the former is better enforcement mode. Based on such understanding, the technical scheme of the present invention in essence or says that part prior art contributed can embody with the form of software product, this computer software product is stored in the storage media that can read, such as the floppy disk of computer, hard disk or CD etc., comprise some instructions with so that a computer equipment (can be Personal Computer, server, or the network equipment etc.) performs the method described in each embodiment of the present invention.
The above; it is only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any it is familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (13)
1. a method for handover control, it is characterised in that, comprising:
Determine multiple candidate user devices UE;
Determine to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, each region of this community described is by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, according to predetermined angle this community divided equally and obtain;
Described determine that multiple candidate user devices UE comprises:
Receiving the signal measurements that each UE sends, described signal measurements is the signal measurements obtained after this community is carried out signal measurement by UE, and described signal measurements is more little, more far away for the distance represented between the base station of described UE and this community described;
UE corresponding for all signal measurements being less than predetermined threshold value is defined as candidate UE.
2. method according to claim 1, it is characterised in that, also comprise:
The load calculating this community is from when currently value drops to target value, it is necessary to the PRB sum K1 of release, and wherein, described target value is make this community described be in the load value of non-congested state Shi Zhe community;
Calculate the PRB sum K2 that described multiple candidate UE takies.
3. method according to claim 2, it is characterised in that, described determine to need the multiple object UE carrying out cell merge to comprise from described multiple candidate UE:
As K1 >=K2, described multiple candidate UE all is defined as needing carrying out the object UE of cell merge;
As K1 < K2, candidate UE minimum for signal measurements in described multiple candidate UE is defined as first aim UE, and start with described first aim UE region, in each region of this community, determine to be arranged in the minimum candidate UE of the signal measurements of one's respective area successively as object UE according to clock-wise order or sequence counter-clockwise, until described in the PRB sum that need to take of each object UE of determining equal K1.
4. method according to claim 1, it is characterised in that, described determine to need the multiple object UE carrying out cell merge to comprise from described multiple candidate UE:
S1, the number R determining object UE, R are positive integer;
S2, respectively the initial value of position pointer counter N is set to 1, the initial value of general counter M is set to 0, the initial value of cycle index counter P is set to 1, and choose S candidate UE from described multiple candidate UE, described S candidate UE comprises: front S the candidate UE after arranging according to signal measurements ascending order, wherein, R > S > R/2, S is positive integer;
Whether S3, to judge rank identical with the region of rank in each candidate UE region of top N in the candidate UE region of N+1 position;
If S4-1 is identical, being then move rank after the candidate UE of N+1 position on S position, and be that the candidate UE to the candidate UE of S position of N+2 position moves forward one successively by former rank, meanwhile, the value of general counter M adds 1;
If S4-2 is not identical, then value by position pointer counter N adds 1;
S5, judge whether the value of position pointer counter N equals R/2, or, whether the value of general counter M equals S-R/2;
S6-1, when the value of position pointer counter N is not equal to R/2, and, when the value of general counter M is not equal to S-R/2, jumps to S3 and continue to perform downwards;
S6-2, when the value of position pointer counter N equals R/2, or, when the value of general counter M equals S-R/2, rank is defined as object UE at the candidate UE of front R/2 position;
S7, judge whether the value of cycle index counter P equals 2;
S8-1, when the value of cycle index counter P is not equal to 2, value by position pointer counter N resets to initial value respectively, the value of general counter M is reset to initial value, the value of cycle index counter P is added 1, and, again S candidate UE is chosen, and jump to S3 and continue to perform downwards, wherein, described S the candidate UE again chosen comprises: the candidate UE of rank posterior S-R/2 position and choose front R/2 the candidate UE after arranging according to signal measurements ascending order from the candidate UE except front S candidate UE in front S position candidate UE;
S8-2, when the value of cycle index counter P equals 2, terminate to determine the operation of object UE.
5. method according to the arbitrary item of claim 1-4, it is characterised in that, described signal measurements is Reference Signal Received Power RSRP observed value.
6. method according to the arbitrary item of claim 1-4, it is characterised in that, also comprise:
Switching command is sent, to indicate described multiple object UE to be switched to target adjacent area selected separately to described multiple object UE.
7. a switching control device, it is characterised in that, comprising:
Determination module, for determining multiple candidate user devices UE;
Control module, for determining to need the multiple object UE carrying out cell merge from described multiple candidate UE, the dispersity that described multiple object UE is formed is maximum, described dispersity is for representing the degree of uniformity that multiple UE is distributed in each region of this community, wherein, this community, by taking this little zone center as the center of circle, taking this little zone center to this cell edge as radius, is divided equally according to predetermined angle and is obtained by each region of this community described;
Described determination module comprises:
Receive unit, for receiving the signal measurements that each UE sends, described signal measurements is the signal measurements obtained after this community is carried out signal measurement by UE, and described signal measurements is more little, more far away for the distance represented between the base station of described UE and this community described;
Determining unit, for being defined as candidate UE by UE corresponding for all signal measurements being less than predetermined threshold value.
8. device according to claim 7, it is characterised in that, also comprise:
Calculating module, when dropping to target value for calculating the load of this community from current value, it is necessary to the PRB sum K1 of release, wherein, described target value is make this community described be in the load value of non-congested state Shi Zhe community;
Described calculating module, also for calculating the PRB sum K2 that described multiple candidate UE takies.
9. device according to claim 8, it is characterised in that, described control module specifically for as K1 >=K2, all being defined as needing carrying out the object UE of cell merge by described multiple candidate UE;
Described control module, also specifically for as K1 < K2, candidate UE minimum for signal measurements in described multiple candidate UE is defined as first aim UE, and start with described first aim UE region, in each region of this community, determine to be arranged in the minimum candidate UE of the signal measurements of one's respective area successively as object UE according to clock-wise order or sequence counter-clockwise, until described in the PRB sum that need to take of each object UE of determining equal K1.
10. device according to claim 7, it is characterised in that, described control module comprises:
Determining unit, for determining the number R of object UE, R is positive integer;
Setting unit, for respectively the initial value of position pointer counter N being set to 1, is set to 0 by the initial value of general counter M, and the initial value of cycle index counter P is set to 1;
Selection unit, for choosing S candidate UE from described multiple candidate UE, described S candidate UE comprises: front S the candidate UE after arranging according to signal measurements ascending order, wherein, and R > S > R/2, S is positive integer;
First judging unit, for judging that whether rank is identical with the region of rank in each candidate UE region of top N in the candidate UE region of N+1 position;
First processing unit, for when the result that described first judging unit draws is identical, then it is move rank after the candidate UE of N+1 position on S position, and it is that the candidate UE to the candidate UE of S position of N+2 position moves forward one successively by former rank, meanwhile, the value of general counter M adds 1;
Described first processing unit, also for when the result that described first judging unit draws is not identical, then value by position pointer counter N adds 1;
Whether the 2nd judging unit, equal R/2 for judging the value of position pointer counter N, or, whether the value of general counter M equals S-R/2;
2nd processing unit, for when described 2nd judging unit judges that the value of position pointer counter N is not equal to R/2, and, when the value of general counter M is not equal to S-R/2, instruction continues downward execution from described first judging unit;
Object UE determining unit, for when described 2nd judging unit judges that the value of position pointer counter N equals R/2, or, when the value of general counter M equals S-R/2, rank is defined as object UE at the candidate UE of front R/2 position;
Whether the 3rd judging unit, equal 2 for judging the value of cycle index counter P;
3rd processing unit, for when the value of cycle index counter P is not equal to 2, value by position pointer counter N resets to initial value respectively, the value of general counter M is reset to initial value, the value of cycle index counter P is added 1, and, again S candidate UE is chosen, and indicate and continue downward execution from described first judging unit, wherein, described S the candidate UE again chosen comprises: the candidate UE of rank posterior S-R/2 position and choose front R/2 the candidate UE after arranging according to signal measurements ascending order from the candidate UE except front S candidate UE in front S position candidate UE,
End unit, for when the value of cycle index counter P equals 2, terminating to determine the operation of object UE.
11. devices according to the arbitrary item of claim 7-10, it is characterised in that, described signal measurements is Reference Signal Received Power RSRP observed value.
12. devices according to the arbitrary item of claim 7-10, it is characterised in that, also comprise:
Sending module, for sending switching command to described multiple object UE, to indicate described multiple object UE to be switched to target adjacent area selected separately.
13. 1 kinds of handover control systems, it is characterised in that, comprise the switching control device described in the arbitrary item of the claims 8-12 and multiple user equipment (UE).
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| KR20160071603A (en) * | 2014-12-12 | 2016-06-22 | 삼성전자주식회사 | Method and Apparatus for controlling congestion in a wireless communication system |
| CN109474959A (en) * | 2017-09-07 | 2019-03-15 | 大唐移动通信设备有限公司 | A kind of method and apparatus of cell access |
| CN110972190A (en) * | 2018-09-30 | 2020-04-07 | 大唐移动通信设备有限公司 | Load balancing optimization method and device |
| CN113347621A (en) * | 2020-02-14 | 2021-09-03 | 华为技术有限公司 | Method and device for group switching |
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| CN1859754A (en) * | 2005-12-05 | 2006-11-08 | 华为技术有限公司 | Blind switching method in cell load control |
| EP2169998A2 (en) * | 2001-06-29 | 2010-03-31 | Qualcomm Incorporated | Communication system employing multiple handoff criteria |
| CN101883380A (en) * | 2009-05-04 | 2010-11-10 | 中兴通讯股份有限公司 | Method and device for selecting terminal during congestion processing |
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| EP2169998A2 (en) * | 2001-06-29 | 2010-03-31 | Qualcomm Incorporated | Communication system employing multiple handoff criteria |
| CN1859754A (en) * | 2005-12-05 | 2006-11-08 | 华为技术有限公司 | Blind switching method in cell load control |
| CN101883380A (en) * | 2009-05-04 | 2010-11-10 | 中兴通讯股份有限公司 | Method and device for selecting terminal during congestion processing |
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Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee before: COMBA TELECOM SYSTEMS (CHINA) Ltd. |
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