CN104144445A - Cell selection method, base station and wireless communication system - Google Patents
Cell selection method, base station and wireless communication system Download PDFInfo
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- CN104144445A CN104144445A CN201310172507.0A CN201310172507A CN104144445A CN 104144445 A CN104144445 A CN 104144445A CN 201310172507 A CN201310172507 A CN 201310172507A CN 104144445 A CN104144445 A CN 104144445A
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- 238000010187 selection method Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims description 112
- 238000005259 measurement Methods 0.000 claims description 50
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention provides a cell selection method, a base station and a wireless communication system. Particularly, the cell selection method includes the steps that A, a target cell is found for each user terminal in a wireless access point to be closed; B, when each user terminal has the corresponding target cell, the user terminals in the wireless access point to be closed are transferred to the corresponding target cells, and the wireless access point to be closed is closed. The cell selection scheme is simple and effective.
Description
Technical field
The present invention relates to the communications field, espespecially a kind of cell selecting method, and realize base station and the wireless communication system of the method.
Background technology
In wireless communication system, can be deployed with multiple WAP (wireless access point), these dissimilar WAP (wireless access point) may have different operating frequencies, or the coverage of different magnitudes etc.Such as, macro cell base station and cellulor (small cell) base station just belongs to two kinds of dissimilar WAP (wireless access point).Generally, macro cell base station is operated in 2GHz, and cellulor base station is operated in 3.5GHz.Dense network (dense network) can comprise one or more cellulors, conventionally be deployed in the region that communication flows is larger, such as subway platform of stadium, shopping center, the downtown area of period on daytime, peak period etc., improve the capacity of whole wireless communication system.The multiple cellulors that are deployed in certain region have formed cellulor group or cellulor layer.The coverage that it may be noted that cellulor is generally less than macrocell, can be specifically Microcell (micro cell), picocell (pico cell), Femto cell (femto cell), remote radio base station (RRH) etc.
3GPP has defined following scene in such as Rel-12 SCE SI, and the user in following scene can be distributed in indoor or outdoor.As shown in Figure 1a, macro cell base station is deployed in scene 1 outdoor (outdoor), and the base station in cellulor group is also deployed in outdoor, and the region that cellulor group covers is within macrocell coverage area, or the overlapped coverage of the two.Scene 2 as shown in Figure 1 b, different from scene 1, and the base station deployment in cellulor group is at indoor (indoor).Scene 3, as shown in Fig. 1 c, is only deployed in indoor cellulor group and provides communication service for user terminal.It may be noted that for same geographic area and have macrocell layer and the situation of the cellulor layer that formed by multiple cellulors, general by the most of communication flows in cellulor layer bearer network.
Under the environment with cellulor (such as Fig. 1 a-1c), when user terminal (UE) carries out community selection in cellulor layer, generally will there is maximum Reference Signal Received Power (RSRP, Reference Signal Receiving Power) cellulor as Serving cell (hereinafter referred to as RSRP method), thereby ensure UE can receive the strongest signal.Fig. 2 illustrates the RSRP method realization flow of (comprising step 202-204), and macro cell base station is obtained RSRP measurement report from certain UE in step 201, judges whether this UE needs to carry out community switching in step 202.If needed, in step 203 for this UE selects a RSRP base station as serving BS, and send switching command (handover command) to this UE in step 204, require this UE by a RSRP base station access communications network and finish the flow process of Fig. 2; If do not needed, directly finish the flow process of Fig. 2.Wherein, a RSRP base station can be the cellulor base station with maximum RSRP.
But there are following one or more problems in RSRP method.Such as, also can start work even if some cellulor load is very low, thereby increase the interference of communication network.And for example, do not consider the load height situation of cellulor and the communication problem such as even that whether distributes.When UE distributes and cellulor distributes when inconsistent, the communication flows distribution in cellulor group is inhomogeneous, but RSRP method is not considered this situation.
Summary of the invention
The embodiment of the present invention provides a kind of cell selecting method, and realizes base station and the wireless communication system of the method.
Particularly, the method that the embodiment of the present invention provides a kind of wireless communication system small area to select, comprising:
A, search Target cell for the each user terminal in WAP (wireless access point) to be closed;
B, in the time there is corresponding Target cell in described each user terminal, the user terminal in WAP (wireless access point) described to be closed is transferred to corresponding Target cell, and will described in WAP (wireless access point) to be closed close.
In a specific implementation, described A comprises: according to described user terminal measurement to signal strength signal intensity instruction, described system in the load instruction of WAP (wireless access point), and one or more parameters in the coverage of WAP (wireless access point), for described user terminal is searched Target cell.
In a specific implementation, described A comprises:
From the WAP (wireless access point) of described system, select to connect number of users or resource utilization and be greater than the first WAP (wireless access point) of presetting load-threshold as described Target cell; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
In a specific implementation, described A comprises:
According to this user terminal measurement to signal strength signal intensity instruction and the described system of WAP (wireless access point) to be closed in the difference of signal strength signal intensity instruction of other WAP (wireless access point) select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
In a specific implementation, described signal strength signal intensity instruction comprises following at least one parameter: Reference Signal Received Power RSRP, Reference Signal Received Quality RSRQ, Signal to Interference plus Noise Ratio SINR, received signal strength indicator RSSI.
The method further comprises: before steps A, according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, perform step A and B; Otherwise execution step C, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection; Or
Before steps A, cover according to default the area size that WAP (wireless access point) to be closed covers described in thresholding judgement, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, perform step A and B; Otherwise execution step C, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.
In a specific implementation, described step C further comprises: whether the communication described in judgement in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.
The method further comprises: according to load instruction and/or the coverage of WAP (wireless access point) in described system, and WAP (wireless access point) to be closed described in one or more WAP (wireless access point) minimum load or that covering is minimum are elected as.
The embodiment of the present invention also provides a kind of base station, comprising: be provided with Target cell and search the first community selected cell of module and community closing control module; Wherein
Module is searched in described Target cell, is used to the each user terminal in WAP (wireless access point) to be closed to search Target cell;
Described community closing control module, in the time that described each user terminal exists corresponding Target cell, transfers to corresponding Target cell by the user terminal in WAP (wireless access point) described to be closed, and described in inciting somebody to action, WAP (wireless access point) to be closed is closed.
In a specific implementation, described Target cell search module for: according to described user terminal measurement to signal strength signal intensity instruction, the load instruction of wireless communication system WAP (wireless access point) and the coverage of WAP (wireless access point) in one or more parameters, for described user terminal is searched Target cell.
In a specific implementation, described Target cell search module for: select to connect WAP (wireless access point) that number of users or resource utilization be greater than the first default load-threshold as described Target cell from the WAP (wireless access point) of wireless communication system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
In a specific implementation, described Target cell search module for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of other WAP (wireless access point) of wireless communication system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
This base station further comprises:
The second community selected cell, for according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection;
Control unit is selected in community, be used for according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, trigger described the first community selected cell startup work, otherwise trigger described the second community selected cell startup work; Or, the area size covering according to WAP (wireless access point) to be closed described in the judgement of default covering thresholding, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, trigger described the first community selected cell startup work, otherwise trigger described the second community selected cell startup work.
In a specific implementation, described the second community selected cell is further used for: whether the communication described in judgement in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.
In a specific implementation, described the first community selected cell further comprises: module is selected in Dai Guan community, be used for according to load instruction and/or the coverage of described system WAP (wireless access point) WAP (wireless access point) to be closed described in one or more WAP (wireless access point) minimum load or that covering is minimum are elected as.
The embodiment of the present invention also provides a kind of wireless communication system, comprising: one or more base stations, and user terminal;
Described user terminal is for receiving load instruction and/or coverage to search corresponding Target cell from described one or more base stations, and/or according to described user terminal measurement to signal strength signal intensity instruction search Target cell, and send the community of carrying determined Target Cell Identifier and select to report to the source cell base station of this user terminal;
When described source cell base station all finds corresponding Target cell for all user terminals of administering at self, each user terminal of administering to self sends switching command, and after switching completes, self is closed.
In a specific implementation, described user terminal is used for: select connection number of users or resource utilization to be greater than the first WAP (wireless access point) of presetting load-threshold as described Target cell from the WAP (wireless access point) of described system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
In a specific implementation, described user terminal is used for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of described other WAP (wireless access point) of system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
Can find out, the community selection scheme complexity that the embodiment of the present invention proposes is low, closes the improvement having brought communication qualities such as SINR, thereby reach balance by community between the factors such as the utilization of resources and communication quality (such as SINR).Further, the expense of the scheme that the embodiment of the present invention provides in signaling exchange is less.
Brief description of the drawings
Fig. 1 a-1c is the dense network schematic diagram defining in 3GPP;
Fig. 2 illustrates the realization flow of RSRP method;
Fig. 3 is the realization flow figure of IA method in one embodiment of the invention;
Fig. 4 is the realization flow figure of IA method in another embodiment of the present invention;
Fig. 5 a illustrates the concrete scene that in one embodiment of the invention, user plane separates with control plane;
Fig. 5 b is that of flow process shown in Fig. 4 realizes scene;
Fig. 6 illustrates in one embodiment of the invention and adopts IA method to carry out the idiographic flow of community selection;
Fig. 7 illustrates the idiographic flow that adopts IA method and RSRP method to carry out community selection in another embodiment of the present invention;
Fig. 8 illustrates the idiographic flow that adopts IA method, RSRP method and RA method to carry out community selection in another embodiment of the present invention;
Fig. 9 is the method flow diagram of being selected by UE side control community in one embodiment of the invention;
Figure 10 is the method flow diagram of being selected by UE side control community in another embodiment of the present invention;
Figure 11 is the method flow diagram of being selected by UE side control community in another embodiment of the present invention;
Figure 12 is for realizing the structural representation of the base station of selecting community in one embodiment of the invention;
Figure 13 is for realizing the structural representation of the base station of selecting community in another embodiment of the present invention;
Figure 14 is for realizing the structural representation of the wireless communication system of selecting community in one embodiment of the invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The embodiment of the present invention provides a kind of cell selecting method, for the each user terminal in WAP (wireless access point) to be closed is searched Target cell (step 301).In the time that described each user terminal exists corresponding Target cell, the user terminal in WAP (wireless access point) described to be closed is transferred to corresponding Target cell, and described in inciting somebody to action, WAP (wireless access point) to be closed is closed (step 302).It may be noted that it can be that its data channel is closed to (mute) that WAP (wireless access point) is closed, and makes this WAP (wireless access point) not send data.In another specific implementation, also can make this WAP (wireless access point) neither send data also not send reference signal by WAP (wireless access point) is closed.Further, the method also will be according to the load instruction of WAP (wireless access point) in wireless communication system, disturb the one or more parameters in instruction, coverage, by minimum load or disturb maximum or cover minimum one or more WAP (wireless access point) elect as described in WAP (wireless access point) to be closed (step 300).Alternatively, the method can be one by one carried out whether closable judgement to all WAP (wireless access point) in system.
In a specific implementation of step 301, can be according to the one or more parameters in the load instruction of WAP (wireless access point) in wireless communication system, interference instruction, coverage, for described user terminal is searched Target cell.Wherein, load instruction can be: connect number of users, and resource utilization, or average user throughput etc.; What disturb instruction measurement is the annoyance level of this WAP (wireless access point) to other communities; Coverage can be: antenna configuration (such as antenna structure, size, placement location etc.), or transmitting power etc.Or, in another specific implementation of step 301, can according to user terminal measurement to signal strength signal intensity instruction search Target cell.Or, according to the load instruction of WAP (wireless access point), disturb instruction, coverage, and one or more parameters such as the user terminal measurement signal strength signal intensity instruction of arriving, for this user terminal is searched Target cell.Such as, can according to described user terminal measurement to signal strength signal intensity instruction, described system in the load instruction of WAP (wireless access point), and one or more parameters in the coverage of WAP (wireless access point), for described user terminal is searched Target cell.
Particularly, can all wireless access point selection connection numbers of users or resource utilization from wireless communication system be greater than the first WAP (wireless access point) of presetting load-threshold as described Target cell.Also can the wireless access point selection average user throughput from wireless communication system be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.Particularly, can also select transmitting power to be greater than the default WAP (wireless access point) that covers thresholding as Target cell.
In another specific implementation of the present invention, also can according to this user terminal measurement to signal strength signal intensity instruction and the described system of WAP (wireless access point) to be closed in the difference of signal strength signal intensity instruction of other WAP (wireless access point) select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.Wherein, signal strength signal intensity instruction can comprise following at least one parameter: Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), received signal strength indicator (RSSI) etc.
It may be noted that according to load instruction, disturb the parameters such as instruction, coverage to select WAP (wireless access point) to be closed, is different from the mode of searching Target cell according to parameters such as load instruction, interference instruction, coverages.Selecting in the time closing WAP (wireless access point), can be preferentially by low load, disturb large, cover little WAP (wireless access point) and select.On the contrary, in the time searching Target cell, be by high load, disturb base station little, that cover large WAP (wireless access point) and be defined as Target cell.
In specific implementation of the present invention, WAP (wireless access point) to be closed can be the one or more cellulors in cellulor group.Also, the embodiment of the present invention can by cellulor group such as traffic load (traffic load) compare Di community mute, thereby reduced the interference of wireless communication system.Below also the cell selecting method of the embodiment of the present invention can be called to (IA, the Interference Awareness) method of attention of disturbing.
The IA method that the embodiment of the present invention provides, in the time closing one or more cellulor, can be controlled by base station side (eNB), also can and carry out Target cell selection by UE side by UE and base station Collaborative Control.For the flow process of base station side control, can carry out major control by macro cell base station again, or carry out major control by certain the cellulor base station in cellulor group.
Fig. 4 is the realization flow figure of IA method in one embodiment of the invention, in the method for Fig. 4, user plane (U-plane) separates with control plane (C-plane), and control plane is realized in macrocell layer, and user plane is realized at cellulor layer, this scene is referring to Fig. 5 a.Particularly, Fig. 4 comprises the following steps.
Certain user (hereinafter referred to as UE1) under cellulor A is undertaken, after conventional RSRP measurement, sending RSRP measurement report in step 402 to macro cell base station by step 401.Load instruction (load indicator) also can be sent to macro cell base station in step 403 in the base station of cellulor A.In a specific implementation, this load instruction can comprise: connect number of users, resource utilization (resource usage), average user throughput etc.In another specific implementation, the base station of cellulor A also can be sent and disturb instruction to macro cell base station in step 403, or its coverage is informed to macro cell base station.It may be noted that the sequencing on carrying out is not limited the present embodiment to step 403 and step 401-402.
In step 404, macro cell base station is elected cellulor A as cellulor to be closed, and is each user (comprising UE1) the select target community in cellulor A.Particularly, macro cell base station selects the condition of cellulor to be closed can be: this cellulor is greater than default thresholding to the interference of neighbor cell, or the connection number of users of this cellulor is less than the first default load-threshold etc.In addition, also can carry out the selection of Target cell according to following one or more constraints.Such as, select to connect the Target cell that number of users is greater than 0.And for example, if community A(is also cellulor A) RSRP and the difference of the RSRP of community B within preset difference value thresholding, Ke Jiang community B elects Target cell as.
In step 405, macro cell base station determines whether that all users in cellulor A select Target cell, if all users select one or more Target cells, in step 406, sends switching command to all users of this cellulor A.In step 407, UE1 receives after switching command, to corresponding Target cell, Physical Random Access Channel (PRACH, Physical Random Access Channel) random access request is sent in the base station of (such as cellulor B), and communication data is transferred to cellulor B from cellulor A.For other users in cellulor A, can operate with reference to the handling process of UE1, communication data is transferred to the respective target cells of selecting for it from cellulor A.
Such as, in the scene shown in Fig. 5 b, carrying out before the selection of community, in cellulor 1, there are 2 users (UE1 and UE2), cellulor 2 and 3 has respectively 3 users, and cellulor 4 has been closed data channel (mute).Select cellulor 1 for after closing cellulor, be required to be UE1 and UE2 select target community.Can find out, the Target cell of UE1 is cellulor 3, and the Target cell of UE2 is cellulor 2.Correspondingly, UE1 is transferred to cellulor 3, UE2 transfers to cellulor 2, and cellulor 1 is closed.
Fig. 6 illustrates in one embodiment of the invention and adopts IA method to carry out the idiographic flow of community selection, and wherein macro cell base station plays main control action, is the UE select target community in cellulor to be closed by it.
In step 601, macro cell base station receives the RSRP measurement report of one or more UE in its coverage.In step 602, this macro cell base station obtain with the corresponding cellulor group of this macrocell in the load instruction of each cellulor.In step 603, macro cell base station sorts all cellulors to obtain load bank sequence table according to load.In step 604, judge and can find corresponding Target cell for all UE in the minimum cellulor of load in list.If it is perform step 605, corresponding Target cell is elected as to the new Serving cell of this UE.In step 606, macro cell base station is sent switching command to all UE in the minimum cellulor of load, and performs step 607.If not, directly perform step 607.In step 607, cellulor minimum load is deleted from load bank sequence table.In step 608, judge whether the number of cells in load bank sequence table is greater than default work community thresholding, if be greater than, return to execution step 604, otherwise flow process finishes.When specific implementation, also can, according to the flow process termination condition in actual conditions setting steps 608, judge whether to finish such as close ratio according to community, exceed 50% if ratio is closed in this community, process ends.
In above-mentioned steps 403 and 602, cellulor base station feedback can be also to disturb instruction, macro cell base station correspondingly will, according to disturbing instruction select cellulor to be closed, and be carried out follow-up flow process.
It may be noted that, in the flow process shown in Fig. 3, before adopting IA method, also can be according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, carry out IA method; Otherwise according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.Or, before step 301, according to the interference height of WAP (wireless access point) to be closed to other WAP (wireless access point) described in default interference threshold judgement, if described in the interference of WAP (wireless access point) to be closed higher than described default interference threshold, perform step 301 and 302 IA method; Otherwise according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.Or, before step 301, cover according to default the area size that WAP (wireless access point) to be closed covers described in thresholding judgement, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, perform step 301 and 302; Otherwise according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.
In a specific implementation, load for WAP (wireless access point) to be closed is preset load-threshold higher than second, or the interference of WAP (wireless access point) to be closed is lower than the situation of default interference threshold, whether the communication described in can further judging in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.It may be noted that load-balancing method herein can be described as again resource and notes (RA, resource awareness) method.Particularly, RA method can be transferred to load Di community from load Gao community by UE, makes the multiple communities in wireless communication system reach load balancing.
Fig. 7 illustrates the idiographic flow that adopts IA method and RSRP method to carry out community selection in another embodiment of the present invention.In the embodiment shown in fig. 7, macro cell base station basis as shown in table 1 such as load height adopts different cell selecting methods to different cellulors.
Table 1
| Low load | High capacity | |
| Community is selected | IA method | RSRP method |
Particularly, the corresponding step 601 of step 701, the corresponding step 602 of step 702 repeats no more herein.In step 703, macro cell base station judges the load height of each cellulor.For the low cellulor execution step 704 of load, for the high cellulor execution step 705 of load, flow process finishes.It may be noted that macro cell base station can judge load height according to the second default load-threshold, higher than threshold value be high capacity, lower than threshold value is low load.IA method in step 704 can refer step 603-608 flow process, the flow process that the RSRP method in step 705 can refer step 202-204 repeats no more herein.Further, in step 703, macro cell base station also can be according to cellulor to be closed the interference height to other WAP (wireless access point), and/or the area size that covers of cellulor to be closed, decides IA method or the RSRP method selected.Generally speaking, low in load, disturb large and/or cover little in the situation that and can select IA method.
Fig. 8 illustrates the idiographic flow that adopts IA method, RSRP method and RA method to carry out community selection in another embodiment of the present invention.Wherein, RA method is load-balancing method, such as the UE that cellulor high load is administered transfers to the low cellulor of load, makes to reach load balance between multiple cellulors.Particularly, step 801-804 corresponds respectively to the step 701-704 in Fig. 7.In step 805, judge that whether the distribution of cellulor is even, if be evenly distributed, the 806 employing RSRP methods that perform step are carried out community selection, if skewness, the 807 employing RA methods that perform step are carried out community selection.Afterwards, flow process finishes.In step 805, macro cell base station can consider traffic load in cellulor group whether evenly or UE distribute whether even etc.
Also, in the embodiment shown in fig. 8, macro cell base station is as shown in table 2 considers load height and the situation such as be evenly distributed, and the cellulor of different situations is adopted to different cell selecting methods.Particularly, table 3 has carried out detailed comparison to RSRP method, RA method and IA method.
Table 2
| Low load | High capacity | |
| Be uniformly distributed | IA method | RSRP method |
| Non-uniform Distribution | IA method | RA method |
Table 3
For the scene without macro cell base station (such as Fig. 1 c), can be completed by certain the cellulor A in cellulor group the function of macro cell base station in Fig. 3-8, idiographic flow, referring to Fig. 3-8, repeats no more herein.It may be noted that this cellulor A not only obtains RSRP measurement report from the UE of self administration, also other cellulors from cellulor group receive the RSRP measurement report that the UE of these other cellulors provides.In one implementation, other cellulors first obtain RSRP measurement report from self UE, then the RSRP measurement report of self all UE is offered to cellulor A carry out Target cell selection.
In the one or more embodiment of the present invention shown in Fig. 9-11, carry out the major control flow process in cell selecting method by UE side.
In Fig. 9, UE1 carries out RSRP measurement in step 901.In step 902, load instruction (or disturbing instruction, coverage etc.) is sent to all UE that self administer by source cell base station.In step 903, UE1 is according to IA method select target community.In step 904, UE1 sends community to source cell base station and selects report.In a specific implementation, community selects report to carry Target cell ID, and can further carry cell selecting method designator.Wherein, what cell selecting method designator was used to indicate UE employing is RSRP method, or RA method, or IA method.Particularly, community is selected report can increase signaling newly or is adopted existing signaling (such as RSRP measurement report) to realize.In step 905, source cell base station judges that whether all users that self administer all select Target cell, if it is perform step 906.In step 906, source cell base station is sent a switching command to each user of self administration.The UE1 that receives switching command sends PRACH random access request in step 907 to target cell base station.
In Figure 10, step 1001 is corresponding with step 901, and step 1002 is corresponding with step 902.In step 1003, UE finds out one or more Target cells according to IA method.In step 1004, UE sends community and selects report to base station.Above-mentioned steps 1001-1004 is the operation that UE side is carried out.In step 1005, base station is that UE determines Target cell.In step 1006, base station determines whether that the each UE self administering determines Target cell.If it is perform step 1007, determined Target cell is elected as to the new Serving cell of corresponding UE.If not, execution step 1008, elects new Serving cell according to RSRP method as by a RSRP community (also having the cellulor of maximum RSRP).Afterwards, execution step 1009, sends switching command to corresponding UE, requires this UE to be switched to new Serving cell.
Flow process shown in Figure 11 and Fig. 9 is similar, under the difference it may be noted that is shown in.In step 1102, UE1 can receive the load instruction broadcast (or coverage broadcast) of its adjacent base station (comprising source cell base station and target cell base station).In step 1103, source cell base station is sent base station to UE1 and is treated out code, makes UE1 execution step 1104 for self select target community.In step 1105, UE1 offers source cell base station by virtual RSRP measurement report by the Target cell ID selecting.It may be noted that can in conventional RSRP measurement report, increase respective field constructs described virtual RSRP measurement report, the field increasing is optional instead of essential for indicate this Target cell to source cell base station.In step 1106, source cell base station can determine whether to close voluntarily, while all user terminals of administering at self all being found to Target cell such as source cell base station, closes.In the time of definite closing, this source cell base station is sent switching command to all user terminals (comprising UE1) of its service.
Correspondingly, the base station shown in Figure 12 can be used for carrying out the community selection flow process that said method embodiment (such as Fig. 3-8) mentions.Particularly, this base station comprises: module 1201 is searched in Target cell, is used to the each user terminal in WAP (wireless access point) to be closed to search Target cell; Community closing control module 1202, in the time that described each user terminal exists corresponding Target cell, transfers to corresponding Target cell by the user terminal in WAP (wireless access point) described to be closed, and described in inciting somebody to action, WAP (wireless access point) to be closed is closed.This base station further comprises: module 1203 is selected in Dai Guan community, for according to the load instruction of wireless communication system WAP (wireless access point), disturb the one or more parameters in instruction, coverage, by minimum load or disturb maximum or cover minimum one or more WAP (wireless access point) elect as described in WAP (wireless access point) to be closed.
In a specific implementation, Target cell search module 1201 for: according to the load instruction of wireless communication system WAP (wireless access point), disturb the one or more parameters in instruction, coverage, for described user terminal is searched Target cell; And/or, according to described user terminal measurement to signal strength signal intensity instruction search Target cell.
In a specific implementation, Target cell search module 1201 for: select to connect WAP (wireless access point) that number of users or resource utilization be greater than the first default load-threshold as described Target cell from the WAP (wireless access point) of wireless communication system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
In a specific implementation, Target cell search module 1201 for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of other WAP (wireless access point) of wireless communication system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
In another embodiment, the base station shown in Figure 13 can be used for carrying out the community selection flow process that said method embodiment (such as Fig. 3-8) mentions.Particularly, this base station comprises: be provided with Target cell and search the first community selected cell 131 of module 1201 and community closing control module 1202.Wherein, the function of module 1201 and community closing control module 1202 is searched referring to the associated description of Figure 11 in Target cell, repeats no more herein.Further, this first community selected cell 131 also comprises Dai Guan community selection module 1203.
Further, the base station shown in Figure 13 also comprises: the second community selected cell 132, and control unit 133 is selected in community.
In specific implementation of the present invention, the second community selected cell 132 can be used for according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.Community selects control unit 133 for according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, trigger described the first community selected cell 131 startup work, otherwise trigger described the second community selected cell 132 startup work.Also, base station can adopt IA method to carry out community selection, or adopts RSRP method to carry out community selection.
Or, the area size that community selects control unit 133 to cover according to WAP (wireless access point) to be closed described in the judgement of default covering thresholding, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, trigger described the first community selected cell 131 startup work, otherwise trigger described the second community selected cell 132 startup work.
In another specific implementation of the present invention, the second community selected cell 132 is further used for: whether the communication described in judgement in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.
Correspondingly, wireless communication system shown in Figure 14 can be used for carrying out the community selection flow process that said method embodiment (such as Fig. 9-11) mentions, this wireless communication system comprises: one or more base stations (such as base station 1412 and base station 1422), and user terminal 1401.
Wherein, user terminal 1401 is for receiving load instruction from described one or more base stations, disturbing one or more parameters of instruction, coverage to search corresponding Target cell, and/or according to described user terminal measurement to signal strength signal intensity instruction search Target cell, and send the community of carrying determined Target Cell Identifier and select to report to the source cell base station (being assumed to be base station 1412) of this user terminal.
When described source cell base station 1412 all finds corresponding Target cell for all user terminals 1401 of administering at self, each user terminal of administering to self sends switching command, and after switching completes, self is closed.
Particularly, described user terminal 1401 for: select to connect WAP (wireless access point) that number of users or resource utilization be greater than the first default load-threshold as described Target cell from the WAP (wireless access point) of described system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
Particularly, described user terminal 1401 for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of described other WAP (wireless access point) of system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
Can find out, cell selecting method, base station and wireless communication system implementation complexity that the embodiment of the present invention proposes are low, close the improvement having brought communication qualities such as SINR, thereby reach balance by community between the factor such as the utilization of resources and SINR.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (18)
1. the method that wireless communication system small area is selected, is characterized in that, comprising:
A, search Target cell for the each user terminal in WAP (wireless access point) to be closed;
B, in the time there is corresponding Target cell in described each user terminal, the user terminal in WAP (wireless access point) described to be closed is transferred to corresponding Target cell, and will described in WAP (wireless access point) to be closed close.
2. method according to claim 1, it is characterized in that, described A comprises: according to described user terminal measurement to signal strength signal intensity instruction, described system in the load instruction of WAP (wireless access point), and one or more parameters in the coverage of WAP (wireless access point), for described user terminal is searched Target cell.
3. method according to claim 1, is characterized in that, described A comprises:
From the WAP (wireless access point) of described system, select to connect number of users or resource utilization and be greater than the first WAP (wireless access point) of presetting load-threshold as described Target cell; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
4. method according to claim 1, is characterized in that, described A comprises:
According to this user terminal measurement to signal strength signal intensity instruction and the described system of WAP (wireless access point) to be closed in the difference of signal strength signal intensity instruction of other WAP (wireless access point) select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
5. method according to claim 4, it is characterized in that, described signal strength signal intensity instruction comprises following at least one parameter: Reference Signal Received Power RSRP, Reference Signal Received Quality RSRQ, Signal to Interference plus Noise Ratio SINR, received signal strength indicator RSSI.
6. method according to claim 1, it is characterized in that, further comprise: before steps A, according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, perform step A and B; Otherwise execution step C, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection; Or
Before steps A, cover according to default the area size that WAP (wireless access point) to be closed covers described in thresholding judgement, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, perform step A and B; Otherwise execution step C, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection.
7. method according to claim 6, it is characterized in that, described step C further comprises: whether the communication described in judgement in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.
8. according to the method described in claim 1-7 any one, it is characterized in that, further comprise: according to load instruction and/or the coverage of WAP (wireless access point) in described system, WAP (wireless access point) to be closed described in one or more WAP (wireless access point) minimum load or that covering is minimum are elected as.
9. a base station, is characterized in that, comprising: be provided with Target cell and search the first community selected cell of module and community closing control module; Wherein
Module is searched in described Target cell, is used to the each user terminal in WAP (wireless access point) to be closed to search Target cell;
Described community closing control module, in the time that described each user terminal exists corresponding Target cell, transfers to corresponding Target cell by the user terminal in WAP (wireless access point) described to be closed, and described in inciting somebody to action, WAP (wireless access point) to be closed is closed.
10. base station according to claim 9, it is characterized in that, described Target cell search module for: according to described user terminal measurement to signal strength signal intensity instruction, the load instruction of wireless communication system WAP (wireless access point) and the coverage of WAP (wireless access point) in one or more parameters, for described user terminal is searched Target cell.
11. base stations according to claim 9, it is characterized in that, described Target cell search module for: select to connect WAP (wireless access point) that number of users or resource utilization be greater than the first default load-threshold as described Target cell from the WAP (wireless access point) of wireless communication system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
12. base stations according to claim 9, it is characterized in that, described Target cell search module for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of other WAP (wireless access point) of wireless communication system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
13. base stations according to claim 9, is characterized in that, further comprise:
The second community selected cell, for according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection;
Control unit is selected in community, be used for according to the load height of WAP (wireless access point) to be closed described in the second default load-threshold judgement, if described in the load of WAP (wireless access point) to be closed lower than the described second default load-threshold, trigger described the first community selected cell startup work, otherwise trigger described the second community selected cell startup work; Or, the area size covering according to WAP (wireless access point) to be closed described in the judgement of default covering thresholding, if described in the overlay area of WAP (wireless access point) to be closed be less than described default covering thresholding, trigger described the first community selected cell startup work, otherwise trigger described the second community selected cell startup work.
14. base stations according to claim 13, it is characterized in that, described the second community selected cell is further used for: whether the communication described in judgement in WAP (wireless access point) to be closed distributes even, if evenly, according to user terminal measurement to the signal strength signal intensity instruction of multiple WAP (wireless access point) carry out community selection, if inhomogeneous, carry out community selection according to load-balancing method.
15. according to the base station described in claim 9-14 any one, it is characterized in that, described the first community selected cell further comprises: module is selected in Dai Guan community, be used for according to load instruction and/or the coverage of described system WAP (wireless access point) WAP (wireless access point) to be closed described in one or more WAP (wireless access point) minimum load or that covering is minimum are elected as.
16. 1 kinds of wireless communication systems, is characterized in that, comprising: one or more base stations, and user terminal;
Described user terminal is for receiving load instruction and/or coverage to search corresponding Target cell from described one or more base stations, and/or according to described user terminal measurement to signal strength signal intensity instruction search Target cell, and send the community of carrying determined Target Cell Identifier and select to report to the source cell base station of this user terminal;
When described source cell base station all finds corresponding Target cell for all user terminals of administering at self, each user terminal of administering to self sends switching command, and after switching completes, self is closed.
17. wireless communication systems according to claim 16, it is characterized in that, described user terminal is used for: select connection number of users or resource utilization to be greater than the first WAP (wireless access point) of presetting load-threshold as described Target cell from the WAP (wireless access point) of described system; Or
From the WAP (wireless access point) of described system, select average user throughput to be less than the first WAP (wireless access point) of presetting load-threshold as described Target cell.
18. wireless communication systems according to claim 16, it is characterized in that, described user terminal is used for: according to this user terminal measurement to the signal strength signal intensity instruction of WAP (wireless access point) to be closed and the difference of the signal strength signal intensity of described other WAP (wireless access point) of system instruction select described Target cell, other WAP (wireless access point) that described difference is less than to preset difference value thresholding are as described Target cell.
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| JP2014097338A JP6301186B2 (en) | 2013-05-10 | 2014-05-09 | Cell selection method, base station, and radio communication system |
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|---|---|---|---|---|
| CN114025411A (en) * | 2021-10-27 | 2022-02-08 | 浙江大华技术股份有限公司 | Method and device for selecting wireless access point and electronic equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812600A (en) * | 2005-01-26 | 2006-08-02 | 株式会社Ntt都科摩 | A mobile communication system |
| EP2056628A1 (en) * | 2007-10-30 | 2009-05-06 | Nokia Siemens Networks Oy | Communication network element and method of switching activity states |
| CN101815330A (en) * | 2009-02-25 | 2010-08-25 | 大唐移动通信设备有限公司 | Selection method, system and device for switching candidate target cells |
| CN101959292A (en) * | 2009-07-20 | 2011-01-26 | 华为技术有限公司 | Method, equipment and system for saving energy for base station |
| CN102487537A (en) * | 2010-12-02 | 2012-06-06 | 中兴通讯股份有限公司 | Method for selecting target base station (BS) during switching and system thereof |
| CN102696265A (en) * | 2010-01-08 | 2012-09-26 | 三星电子株式会社 | Method for reducing power consumption of base station in wireless communication system |
| CN102695251A (en) * | 2011-03-21 | 2012-09-26 | 上海贝尔股份有限公司 | Energy-saving method in mobile communication system |
| EP2141947B1 (en) * | 2008-07-04 | 2013-01-02 | Nokia Siemens Networks OY | Dynamic reconfiguration of a communication network for efficient energy consumption in case of double coverage detection |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011019039A (en) * | 2009-07-08 | 2011-01-27 | Nec Corp | Base station control method, base station, and base station control device |
| JP2012114753A (en) * | 2010-11-25 | 2012-06-14 | Fujitsu Ltd | Base station, base station control method and base station control program |
-
2013
- 2013-05-10 CN CN201310172507.0A patent/CN104144445B/en not_active Expired - Fee Related
-
2014
- 2014-05-09 JP JP2014097338A patent/JP6301186B2/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812600A (en) * | 2005-01-26 | 2006-08-02 | 株式会社Ntt都科摩 | A mobile communication system |
| EP2056628A1 (en) * | 2007-10-30 | 2009-05-06 | Nokia Siemens Networks Oy | Communication network element and method of switching activity states |
| EP2141947B1 (en) * | 2008-07-04 | 2013-01-02 | Nokia Siemens Networks OY | Dynamic reconfiguration of a communication network for efficient energy consumption in case of double coverage detection |
| CN101815330A (en) * | 2009-02-25 | 2010-08-25 | 大唐移动通信设备有限公司 | Selection method, system and device for switching candidate target cells |
| CN101959292A (en) * | 2009-07-20 | 2011-01-26 | 华为技术有限公司 | Method, equipment and system for saving energy for base station |
| CN102696265A (en) * | 2010-01-08 | 2012-09-26 | 三星电子株式会社 | Method for reducing power consumption of base station in wireless communication system |
| CN102487537A (en) * | 2010-12-02 | 2012-06-06 | 中兴通讯股份有限公司 | Method for selecting target base station (BS) during switching and system thereof |
| CN102695251A (en) * | 2011-03-21 | 2012-09-26 | 上海贝尔股份有限公司 | Energy-saving method in mobile communication system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114025411A (en) * | 2021-10-27 | 2022-02-08 | 浙江大华技术股份有限公司 | Method and device for selecting wireless access point and electronic equipment |
| CN114025411B (en) * | 2021-10-27 | 2024-04-19 | 浙江大华技术股份有限公司 | Method and device for selecting wireless access point and electronic equipment |
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| JP6301186B2 (en) | 2018-03-28 |
| JP2014220816A (en) | 2014-11-20 |
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