CN101867967A - Method and device for realizing carrier aggregation - Google Patents
Method and device for realizing carrier aggregation Download PDFInfo
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- CN101867967A CN101867967A CN200910130926A CN200910130926A CN101867967A CN 101867967 A CN101867967 A CN 101867967A CN 200910130926 A CN200910130926 A CN 200910130926A CN 200910130926 A CN200910130926 A CN 200910130926A CN 101867967 A CN101867967 A CN 101867967A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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Abstract
The invention discloses a method and a device for realizing carrier aggregation. The method comprises the following steps that: a target base station determines a first interference base station causing interference thereto, a second interference base station causing the interference to user equipment, and a reference base station according to the first interference base station and the second interference base station sequentially and aggregates carrier resources of the bases except the reference base station according to the capacity of the user equipment. Through the technical scheme of the invention, the problems of overlarge system overhead, overlong to-and-fro time delay and large carrier re-selection possibility due to the consideration of inter-cell interference coordination for the carrier aggregation can be effectively solved; and inter-cell interference is effectively reduced and the wireless communication quality of the user equipment is guaranteed under the condition that the carrier aggregation meets bandwidth requirements of the user equipment.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of implementation method and device of carrier aggregation.
Background technology
In follow-on broadband wireless communication network, how solving in the cordless communication network supports bigger bandwidth to become a key factor that improves inter-cell user terminal (User Terminal abbreviates UT as) throughput and UT average throughput under the bandwidth in current wireless communication system.
At present, the Long Term Evolution of third generation partner program (Long Term Evolution, abbreviate LTE as) propose in the system to adopt the mode of carrier aggregation to come in current wireless communication system, to support effectively bigger bandwidth, to satisfy in the new generation of wireless standard demand to indexs such as throughput, peak rates.Carrier aggregation is to support the key technology of bigger bandwidth in the future broadband wireless communication systems, by different carrier waves is carried out polymerization, forms the carrier wave of bigger bandwidth, supports the UT with stronger ability on the bandwidth after the polymerization.For example, in advanced long-term evolution system (Long-Term Evolution Advanced abbreviates LTE-Advanced as), support to surpass the bandwidth of 100MHz.
But, at present the carrier aggregation of discussing among the LTE-Advanced is not considered the influence of the presence of intercell interference that minizone UT throughput and UT average throughput are played an important role, if the carrier wave of polymerization partly is subjected to serious presence of intercell interference, even then obtained bigger bandwidth, also can use throughput and the rate capability of the UT of this partially polymerized carrier wave to descend, thereby offset the benefit that carrier aggregation is brought because of serious presence of intercell interference.
Do not consider in the existing correlation technique that presence of intercell interference in the carrier aggregation causes the throughput of UT and the problem that rate capability descends to the influence of UT throughput and average throughput, and do not propose effective solution at present as yet.
Summary of the invention
At considering presence of intercell interference in the carrier aggregation influence of UT throughput and average throughput to be caused the throughput of UT and problem that rate capability descends in the prior art the present invention is not proposed, for this reason, main purpose of the present invention is to provide a kind of carrier aggregation scheme based on limited interference source, to address the above problem.
A kind of implementation method of carrier aggregation is provided according to an aspect of the present invention.
Implementation method according to carrier aggregation of the present invention comprises: target BS is determined it is caused first interference base station of interference; Target BS determines user terminal is caused second interference base station of interference; Target BS is determined reference base station according to first interference base station and second interference base station; Target BS carries out polymerization according to the ability of user terminal to the carrier resource of the base station except that reference base station.
Wherein, target BS is determined to cause first interference base station of interference to comprise to it: target BS is measured the interference signal intensity of each base station in its adjacent cell list, and selects the base station of threshold value to be defined as first interference base station greater than the limited interference source that sets in advance interference signal intensity.
Preferably, target BS determines that said method also comprises after first interference base station: for the target BS and first interference base station, hold consultation in per two base stations wherein, makes the carrier resource pairwise orthogonal of per two base stations.
Wherein, target BS is determined to cause second interference base station of interference to comprise to user terminal: the base station receives the measurement result by user terminal to send up, wherein, measurement result comprises that each base station in the adjacent cell list of target BS is to the interference signal intensity of user terminal; Target BS selects the base station of threshold value to be defined as second interference base station greater than the limited interference source that sets in advance interference signal intensity in the measurement result.
Wherein, target BS determines that reference base station comprises: target BS is got common factor to first interference base station and second interference base station, obtains reference base station.
Wherein, target BS carries out polymerization according to the ability of user terminal to the carrier resource of the base station except that reference base station and comprises: target BS is determined the ability of user terminal; Target BS is according to the ability of user terminal, determines to carry out the number of the base station of polymerization, and/or carries out the bandwidth sizes of each base station in the base station of polymerization.
Preferably, the ability of user terminal comprises: the bandwidth ability of user terminal.
According to another aspect of the present invention, provide a kind of implement device of carrier aggregation, this device can be positioned at base station side.
Implement device according to carrier aggregation of the present invention comprises: first determination module is used for definite first interference base station that the base station is caused interference; Second determination module is used for definite second interference base station that user terminal is caused interference; Acquisition module is used for first interference base station and second interference base station are got common factor, obtains reference base station; The carrier aggregation module is used for according to the ability of user terminal the carrier resource of the base station except that reference base station being carried out polymerization.
Wherein, above-mentioned first determination module comprises: measure submodule, be used for measuring the interference signal intensity of each base station of the adjacent cell list of base station; First determines submodule, is used for selecting the base station of threshold value to be defined as first interference base station greater than the limited interference source that sets in advance interference signal intensity.
Wherein, second determination module comprises: receive submodule, be used to receive the measurement result by user terminal to send up, wherein, measurement result comprises that each base station in the adjacent cell list of target BS is to the interference signal intensity of user terminal; Second determines submodule, is used for selecting the base station of threshold value to be defined as second interference base station greater than the limited interference source that sets in advance the measurement result interference signal intensity.
By above-mentioned at least one technical scheme of the present invention, the base station is when carrying out carrier aggregation for user terminal, selection produces limited interference source (interference base station) carrier resource in addition that disturbs to this user terminal and carries out polymerization, the problem excessive in the time of can effectively solving carrier aggregation, that round-trip delay is long, the change of carrier wave gravity treatment probability is big owing to the overhead of considering Inter-Cell Interference Coordination, and satisfy in carrier aggregation under the situation of user terminal bandwidth demand, reduce presence of intercell interference effectively, guaranteed the radio communication quality of user terminal.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of implementation method of the carrier aggregation of the embodiment of the invention;
Fig. 2 is the detail flowchart of implementation method of the carrier aggregation of the embodiment of the invention;
Fig. 3 is the structured flowchart of implement device of the carrier aggregation of the embodiment of the invention;
Fig. 4 is the structured flowchart of implement device of the carrier aggregation of the preferred embodiment of the present invention.
Embodiment
Functional overview
Consider and do not consider in the correlation technique that presence of intercell interference in the carrier aggregation causes the throughput of UT and the problem that rate capability descends to the influence of UT throughput and average throughput, the embodiment of the invention provides a kind of implementation of the carrier aggregation based on limited interference source, basic thought of the present invention is: select threshold value to determine the limited interference source of sub-district according to the interference source signal strength signal intensity, with the interference-limited of adjacent sub-district in certain scope, and when MRP, guarantee the complete quadrature of resource that limited interference source takies, the base station is selected that user terminal is produced the limited interference source carrier resource in addition that disturbs and is carried out polymerization when carrying out carrier aggregation for user terminal.When effectively having solved carrier aggregation because the overhead when considering Inter-Cell Interference Coordination (ICIC) is excessive, round-trip delay is long, carrier wave gravity treatment probability becomes big defective, carrier aggregation with the situation that satisfies the user terminal bandwidth demand under, reduce presence of intercell interference effectively, guaranteed the method for the radio communication quality of user terminal.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
According to the embodiment of the invention, provide a kind of implementation method of carrier aggregation.
Fig. 1 is the flow chart according to the base station state control method of the embodiment of the invention, need to prove, for convenience of description, in Fig. 1, illustrated and described the technical scheme of method embodiment of the present invention, can in computer system, carry out such as a set of computer-executable instructions in the step shown in Fig. 1 with the form of step.Though figure 1 illustrates logical order, in some cases, can carry out step shown or that describe with the order that is different from herein.As shown in Figure 1, this method is used to determine to treat transmission block and cuts apart required parameter, mainly may further comprise the steps (step S102 is to step S108).
Step S102, target BS is determined to it (promptly, this target BS) causes first interference base station (being limited interference source mentioned above) of interference, concrete operations are: target BS is measured the interference signal intensity of each base station in its adjacent cell list, and select the base station of threshold value to be defined as first interference base station greater than the limited interference source that sets in advance the interference signal intensity, as can be seen, this first interference base station is a collection of base stations, afterwards, for the target BS and first interference base station, holding consultation in per two base stations wherein, makes the carrier resource pairwise orthogonal of per two base stations.
Step S104, target BS determines user terminal is caused second interference base station of interference, the current target BS that belongs to of this user terminal, that is, this target BS is the serving BS of this user terminal.The concrete operations of this step are: the base station receives the measurement result by user terminal to send up, and wherein, measurement result comprises that each base station in the adjacent cell list of target BS is to the interference signal intensity of user terminal; Target BS selects the base station of threshold value to be defined as second interference base station greater than the limited interference source that sets in advance interference signal intensity in the measurement result, and as can be seen, this second interference base station is a collection of base stations.
Step S106, target BS is determined reference base station according to first interference base station and second interference base station, concrete operations are: target BS is got common factor to first interference base station and second interference base station, obtain reference base station, this reference base station is a collection of base stations, and this set can be empty set, for example, first interference base station is BS 1, BS 2, BS 3, BS 4, BS 7, second interference base station is BS 3, BS 5, BS 6, BS 7, BS 8, first interference base station and second interference base station are got after the common factor, and the reference base station of acquisition is: BS 3 and BS 7.
Step S108, target BS carries out polymerization according to the ability of user terminal to the carrier resource of the base station except that reference base station in the above-mentioned adjacent cell list, concrete operations are: target BS is determined the ability of user terminal, when UE is linked into target BS, the base station will obtain the ability of user terminal according to relevant physical process (for example, random access procedure); Target BS is according to the ability of user terminal, determine to carry out the number of the base station of polymerization, and/or carry out the amount of bandwidth of each base station in the base station of polymerization, wherein, the ability of user terminal can comprise the bandwidth ability (for example, the amount of bandwidth of user terminal) of user terminal, for example, the amount of bandwidth of supposing user terminal is 20M, and then can select 4 amount of bandwidth is the base station of 5M, and carrier aggregation is carried out in these 4 base stations; Also can select 2 amount of bandwidth is the base station of 10M, and carrier aggregation is carried out in these 2 base stations; Can also select 2 amount of bandwidth is 5M and 1 base station that amount of bandwidth is 10M, and carrier aggregation is carried out in these 3 base stations, and other system of selection, gives unnecessary details no longer one by one here.
Need to prove, along with the variation of the residing condition of user terminal (for example, the change of the moving of user terminal, ability of user terminal etc.), if use the new carrier wave that forms after the said method polymerization to produce the strategy that does not satisfy presence of intercell interference in the current system again, then can reuse and the invention provides said method and reselect new reference base station, to carry out carrier aggregation.For example, during new resources after user terminal uses polymerization, if this user terminal detects interference that new resources cause its (that is this user terminal) when big, then can reuse and the invention provides said method, make that the base station is the new resource of this user terminal selecting.
The technical scheme that provides by the embodiment of the invention, the base station is when carrying out carrier aggregation for user terminal, selection produces limited interference source (interference base station) carrier resource in addition that disturbs to this user terminal and carries out polymerization, the problem excessive in the time of can effectively solving carrier aggregation, that round-trip delay is long, the change of carrier wave gravity treatment probability is big owing to the overhead of considering Inter-Cell Interference Coordination, and satisfy in carrier aggregation under the situation of user terminal bandwidth demand, reduce presence of intercell interference effectively, guaranteed the radio communication quality of user terminal.
Fig. 2 is the detailed process flow chart according to the implementation method of the carrier aggregation of the inventive method embodiment, as shown in Figure 2, and main following handle (step S201 is to step S209):
Step S201, target BS is determined limited interference source selection threshold value, wherein, this limited interference source selects threshold value to be used for distinguishing all base stations that this cell base station caused strong presence of intercell interference, the orthogonality of the running time-frequency resource that overhead, round-trip delay when this threshold value can finally influence Inter-Cell Interference Coordination and the limited interference source of determining are shared, and, in different base stations, different values can be set, help effectively determining main interference source.
Step S202, target BS measure the interference signal intensity of each base station in its adjacent cell list.
Step S203, target BS select interference signal intensity to be higher than base station that limited interference source selects threshold value as its limited interference source (that is, mentioned above first interference base station).
In step S202 and step S203, target BS is finally determined current area is produced several interference sources of presence of intercell interference by force according to the comparing result of interference signal intensity of measuring and limited interference source selection threshold value.
Step S204, target BS is that limited interference source is divided carrier resource, and guarantee that carrier resource keeps quadrature, be to hold consultation in per two base stations in target BS and above-mentioned several interference sources, make the carrier resource pairwise orthogonal of per two base stations, like this, can reduce the interference of minizone effectively.
Step S205, target BS determine the ability of user terminal, and the ability of this user terminal mainly comprises the bandwidth ability of user terminal, and the bandwidth ability of user terminal can influence the number of the carrier wave that carries out polymerization, and/or the size of each carrier wave.
Step S206, the interference signal intensity of each base station in the user terminal measurement adjacent cell list, and measurement result reported target BS.
Step S207, target BS selects the base station of threshold value to be defined as second interference base station greater than the limited interference source that sets in advance interference signal intensity in the measurement result, interference can be caused to user terminal in base station in this second interference base station, the target BS inspection causes to user terminal whether the base station of interference is limited interference source, if judged result is for being, then forward step S208 to, otherwise forward step S209 to.
Step S208, target BS determine in the limited interference source user terminal is caused interference the base station (promptly, reference base station above), and selects carrier resource to carry out polymerization, form new carrier wave to satisfy the ability need of user terminal from any carrier resource except that these reference base station.For example, the amount of bandwidth of supposing user terminal is 30M, and then can select 3 amount of bandwidth is the base station of 10M, and carrier aggregation is carried out in these 3 base stations; Also can select 6 amount of bandwidth is the base station of 5M, and carrier aggregation is carried out in these 6 base stations; Can also select 2 amount of bandwidth is 5M and 2 base stations that amount of bandwidth is 10M, and carrier aggregation is carried out in these 4 base stations, and other system of selection, gives unnecessary details no longer one by one here.
In step S207 and step S208, when target BS is the user terminal selecting carrier resource, select those that user terminal is produced the less carrier resource of presence of intercell interference, promptly avoid the limited interference source of direct interference user terminal, help further reducing presence of intercell interference like this.
Step S209, target BS can select any carrier resource in the adjacent cell list to carry out polymerization, form new carrier wave to satisfy the ability need of user terminal.Like this, the base station can form the bigger new carrier wave that satisfies ability of user terminal by polymerization.
The method of above-mentioned carrier aggregation based on limited interference source is to have considered a kind of blanket, easy, the easy-to-use method of presence of intercell interference.
Device embodiment
According to embodiments of the invention, a kind of implement device of carrier aggregation is provided, this device can be positioned at base station side, and can be used to realize the implementation method of above-mentioned carrier aggregation.
Fig. 3 is the structured flowchart according to the implement device of the carrier aggregation of the embodiment of the invention; As shown in Figure 3, this device comprises first determination module 1, second determination module 2, acquisition module 3 and carrier aggregation module 4.
Function to each module is described below.
First determination module 1 is used for definite first interference base station that the base station is caused interference; Second determination module 2 is used for definite second interference base station that user terminal is caused interference; Acquisition module 3 is connected to first determination module 1 and second determination module 2, is used for first interference base station and second interference base station are got common factor, obtains reference base station; Carrier aggregation module 4 is connected to acquisition module 3, is used for according to the ability of user terminal the carrier resource of the base station except that reference base station being carried out polymerization.
Fig. 4 shows the preferred structure frame diagram of implement device of the carrier aggregation of the embodiment of the invention, as shown in Figure 4, on the basis of device shown in Figure 3, first determination module 1 comprises that measuring submodule 12 and first determines that submodule 14, the second determination modules 2 comprise that receiving submodule 22 and second determines submodule 24.
First determination module 1 comprises: measure submodule 12, be used for measuring the interference signal intensity of each base station of the adjacent cell list of base station; First determines submodule 14, is connected to and measures submodule 12, is used for selecting the base station of threshold value to be defined as first interference base station greater than the limited interference source that sets in advance interference signal intensity.
Second determination module 2 comprises: receive submodule 22, be used to receive the measurement result by user terminal to send up, wherein, measurement result comprises that each base station in the adjacent cell list of target BS is to the interference signal intensity of user terminal; Second determines submodule 24, is connected to and receives submodule 22, is used for selecting the base station of threshold value to be defined as second interference base station greater than the limited interference source that sets in advance the measurement result interference signal intensity.
As mentioned above, implementation method and/or device by means of carrier aggregation provided by the invention, select threshold value to determine the limited interference source of sub-district according to the interference source signal strength signal intensity, with the interference-limited of adjacent sub-district in certain scope, and when MRP, guarantee the complete quadrature of resource that limited interference source takies, the base station is selected that user terminal is produced the limited interference source carrier resource in addition that disturbs and is carried out polymerization when carrying out carrier aggregation for user terminal.When effectively having solved carrier aggregation because the overhead when considering Inter-Cell Interference Coordination (ICIC) is excessive, round-trip delay is long, carrier wave gravity treatment probability becomes big defective, carrier aggregation with the situation that satisfies the user terminal bandwidth demand under, reduce presence of intercell interference effectively, guaranteed the method for the radio communication quality of user terminal.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the implementation method of a carrier aggregation is characterized in that, comprising:
Target BS is determined it is caused first interference base station of interference;
Described target BS determines user terminal is caused second interference base station of interference;
Described target BS is determined reference base station according to described first interference base station and described second interference base station;
Described target BS carries out polymerization according to the ability of described user terminal to the carrier resource of the base station except that described reference base station.
2. method according to claim 1 is characterized in that, described target BS is determined to cause first interference base station of interference to comprise to it:
Described target BS is measured the interference signal intensity of each base station in its adjacent cell list, and selects the base station of threshold value to be defined as described first interference base station greater than the limited interference source that sets in advance interference signal intensity.
3. method according to claim 2 is characterized in that, described target BS determines that described method also comprises after described first interference base station:
For described target BS and described first interference base station, hold consultation in per two base stations wherein, makes the carrier resource pairwise orthogonal of per two base stations.
4. method according to claim 1 is characterized in that, described target BS is determined to cause second interference base station of interference to comprise to user terminal:
Described base station receives the measurement result by described user terminal to send up, and wherein, described measurement result comprises that each base station in the adjacent cell list of described target BS is to the interference signal intensity of described user terminal;
Described target BS selects the base station of threshold value to be defined as described second interference base station greater than the limited interference source that sets in advance interference signal intensity in the described measurement result.
5. method according to claim 1 is characterized in that, described target BS determines that described reference base station comprises:
Described target BS is got common factor to described first interference base station and described second interference base station, obtains described reference base station.
6. method according to claim 1 is characterized in that, described target BS carries out polymerization according to the ability of described user terminal to the carrier resource of the base station except that described reference base station and comprises:
Described target BS is determined the ability of described user terminal;
Described target BS is according to the ability of described user terminal, determines to carry out the number of the base station of polymerization, and/or carries out the bandwidth sizes of each base station in the base station of polymerization.
7. according to each described method in the claim 1 to 6, it is characterized in that the ability of described user terminal comprises: the bandwidth ability of user terminal.
8. the implement device of a carrier aggregation is positioned at base station side, it is characterized in that, described device comprises:
First determination module is used for definite first interference base station that the base station is caused interference;
Second determination module is used for definite second interference base station that user terminal is caused interference;
Acquisition module is used for described first interference base station and described second interference base station are got common factor, obtains reference base station;
The carrier aggregation module is used for according to the ability of described user terminal the carrier resource of the base station except that described reference base station being carried out polymerization.
9. device according to claim 8 is characterized in that, described first determination module comprises:
Measure submodule, be used for measuring the interference signal intensity of each base station of the adjacent cell list of described base station;
First determines submodule, is used for selecting the base station of threshold value to be defined as described first interference base station greater than the limited interference source that sets in advance interference signal intensity.
10. according to Claim 8 or 9 described devices, it is characterized in that described second determination module comprises:
Receive submodule, be used to receive the measurement result by described user terminal to send up, wherein, described measurement result comprises that each base station in the adjacent cell list of described target BS is to the interference signal intensity of described user terminal;
Second determines submodule, is used for selecting the base station of threshold value to be defined as described second interference base station greater than the limited interference source that sets in advance described measurement result interference signal intensity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910130926A CN101867967A (en) | 2009-04-20 | 2009-04-20 | Method and device for realizing carrier aggregation |
| PCT/CN2009/072727 WO2010121448A1 (en) | 2009-04-20 | 2009-07-10 | Method and device for realizing carrier aggregation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910130926A CN101867967A (en) | 2009-04-20 | 2009-04-20 | Method and device for realizing carrier aggregation |
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| CN106465167A (en) * | 2014-04-30 | 2017-02-22 | 瑞典爱立信有限公司 | A user equipment, a network node and methods therein for enabling device-to-device (d2d) communication in a radio communications network |
| CN106465167B (en) * | 2014-04-30 | 2020-01-14 | Oppo广东移动通信有限公司 | User equipment, network node and methods therein for enabling device-to-device (D2D) communication in a radio communications network |
| CN106507368A (en) * | 2015-09-08 | 2017-03-15 | 上海无线通信研究中心 | A method and system for network spectrum sharing |
| WO2020097942A1 (en) * | 2018-11-16 | 2020-05-22 | 华为技术有限公司 | Method for identifying bandwidth capability of terminal, device, and system |
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| WO2010121448A1 (en) | 2010-10-28 |
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