WO2010096946A1 - 资源调度方法、调度器和基站 - Google Patents
资源调度方法、调度器和基站 Download PDFInfo
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- WO2010096946A1 WO2010096946A1 PCT/CN2009/000194 CN2009000194W WO2010096946A1 WO 2010096946 A1 WO2010096946 A1 WO 2010096946A1 CN 2009000194 W CN2009000194 W CN 2009000194W WO 2010096946 A1 WO2010096946 A1 WO 2010096946A1
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- Prior art keywords
- user equipment
- resource
- user
- base station
- probability
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000013468 resource allocation Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000011664 signaling Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
Definitions
- the present invention relates to the field of mobile communications, and more particularly to a distributed probability dynamic interference coordination scheme, which introduces an AL0HA mechanism into dynamic interference coordination, and proposes a resource scheduling method and a scheduler for implementing the foregoing resource scheduling method. And a base station (BS) including the above scheduler.
- BS base station
- orthogonal frequency division multiple access OFDM
- SC-FDMA single-carrier frequency division multiple access
- Static and semi-static coordination techniques are common interference coordination techniques in the LTE proposal. These small-interval interference coordination techniques impose restrictions on the way in which cells are coordinated. For example, it limits the time-frequency resources available to the resource manager or limits the transmission power available for a particular time-frequency resource.
- FIG. 1 shows the frequency reuse scheme proposed in the proposal.
- a total of seven cells are shown, and cells 2 to 7 are the neighboring cells of cell 1.
- the frequencies between adjacent cells should be selected to be orthogonal to each other at the cell edge, and
- the frequency reuse factor is increased as much as possible.
- cell 1 uses frequency 1
- cells 2, 4, and 6 use the same frequency 2
- cells 3, 5, and 7 use the same frequency 3.
- Cell edge users transmit and receive at full power.
- the cell center user uses the entire spectrum for transmission and reception with limited power, so even if the same frequency is used, it does not cause large inter-cell interference (IC I).
- IC I inter-cell interference
- I Reference [2] proposes another static solution called network power planning, which divides the entire frequency band into multiple subsets with corresponding power, for example, 7 to 9 subsets. According to this scheme, the frequency utilization rate of the cell edge user is 3/7.
- Reference [3] proposes a semi-static scheme: dividing the entire frequency band into N sub-bands, X sub-bands for cell edge users, and N-3X sub-bands for cell center users.
- the X subbands for cell edge users are orthogonal between neighboring cells, while the N-3X subbands for cell center users are the same for all cells.
- this scheme only part of the spectrum is used for intra-cell and cell edge, respectively. Summary of the invention
- the above solution is a static solution or a semi-static solution requiring network planning, and the semi-static solution requires additional signaling to indicate that an adjustment has occurred;
- the frequency reuse factor of the cell edge user is greater than 1, which reduces the spectrum efficiency
- the present invention proposes a distributed probability dynamic interference coordination scheme to reduce or eliminate inter-cell interference, wherein the AL0HA mechanism is introduced into dynamic interference coordination.
- a resource scheduling method including: selecting a resource to be scheduled from a scheduling list; selecting a first user equipment to be scheduled from a scheduling list; and if the first user equipment If it is an edge user, the selected resource is assigned to the first user equipment with a probability P, where 0 ⁇ p ⁇ 1.
- the resource scheduling method may further include: if the first user equipment is not an edge user, allocating the selected resource to the first user equipment.
- the resource scheduling method may further include: if the selected resource is not allocated to the first user equipment according to the probability p, returning to the first user equipment selecting step, selecting from the scheduling list The next first user device that is scheduled.
- the resource scheduling method may further include: notifying, to the first user equipment, information about allocating resources to the first user equipment; obtaining scheduling information from all relevant base stations; Scheduling information obtained by all relevant base stations, determining that at least one relevant base station may allocate resources scheduled to be scheduled to the first user equipment to a second user equipment that is an edge user of the at least one related base station, and then execute the resource Probability allocation step.
- the resource scheduling method may further include: if it is determined that all related base stations do not allocate resources scheduled to be scheduled to the first user equipment to the second user equipment, allocate the selected resources to the The first user equipment is described.
- the path loss difference between the first user equipment and its serving cell and its non-serving cell is less than a predetermined threshold PLD. thresho ld, the first user equipment is an edge user, and the non-serving cell
- PLD predetermined threshold
- the predetermined threshold S I R- t hresho l d is equal to the Euler number e.
- the resource probability allocation step may include: generating a random number Re (0, 1); if the random number R is smaller than the probability p, assigning the selected resource to the first user equipment .
- the probability p is pre-configured or dynamically adjustable.
- the scheduling list is determined according to a scheduling algorithm.
- a scheduler for implementing the foregoing resource scheduling method including: a resource selection unit, configured to select a resource to be scheduled from a scheduling list; and a user equipment selection unit, configured to use the scheduling list Selecting a first user equipment to be scheduled; an edge user determining unit, configured to determine whether the first user equipment is an edge user; and a resource probability allocation unit, configured to allocate the selected resource to the a first user equipment, where 0 ⁇ p ⁇ 1, wherein when the edge user determining unit determines that the first user equipment is an edge user, the resource probability allocation unit The resource selected by the resource selection unit is allocated to the first user equipment with the probability p.
- the edge user determining unit determines that the first user equipment is not allocated to the first user equipment.
- the user equipment selection unit selects from the scheduling list. The next first user device to be scheduled.
- the scheduler may further include: a resource allocation information notification unit, configured to: when the edge user determining unit determines that the first user equipment is an edge user, prepare to allocate resources to the first user equipment Information is sent to all relevant base stations of the first user equipment; a scheduling information receiving unit is configured to obtain scheduling information from all relevant base stations; and a relevant base station allocation determining unit is configured to determine all relevant information according to scheduling information obtained from all relevant base stations Whether the base station allocates resources to be scheduled to the first user equipment to the second user equipment that is an edge user of the related base station, where the relevant base station allocation determining unit determines that at least one relevant base station may be ready to be scheduled When the resource of the first user equipment is allocated to the second user equipment that is the edge user of the at least one related base station, the resource probability allocation unit allocates the resource selected by the resource selection unit by the probability p Giving the first user device.
- a resource allocation information notification unit configured to: when the edge user determining unit determines that the first user equipment is an edge user, prepare to allocate resources to the first
- the first user equipment is determined when the relevant base station allocation determining unit determines that all related base stations do not allocate resources scheduled to be scheduled to the first user equipment to the second user equipment.
- the edge user determining unit determines that the first user equipment is an edge. And determining, by the user, the base station to which the non-serving cell belongs is the relevant base station of the first user equipment.
- the edge user determining unit determines that the first user equipment is an edge user, and will be the first The base station immediately adjacent to the serving base station of the user equipment is determined as the relevant base station of the first user equipment. More preferably, the predetermined threshold SIR.threshold is equal to the Euler number e.
- the resource probability allocation unit may include: a random number generating unit, configured to generate a random number Re (0, 1); and a random decision unit, configured to determine whether the generated random number is smaller than the probability p; a resource allocation unit, configured to allocate, according to the generated random number R, the resource selected by the resource selection unit to the first user equipment.
- the probability p is pre-configured or dynamically adjustable.
- the scheduling list is determined according to a scheduling algorithm.
- a base station comprising a scheduler according to the second aspect of the invention is presented.
- the present invention proposes a flexible distributed probability dynamic interference coordination scheme for coordinating inter-cell interference (ICI), which is particularly advantageous in systems with low frequency reuse factors.
- ICI inter-cell interference
- the technical solution proposed by the present invention is completely distributed and dynamic, and does not require signaling exchange or a small amount of signaling exchange.
- FIG. 1 is a schematic diagram showing a frequency reuse scheme proposed in Reference [1];
- FIG. 2 is a flowchart showing a resource scheduling method according to the present invention
- FIG. 3 is a block diagram showing a scheduler 300 in accordance with the present invention.
- Fig. 4 is a schematic view showing an application example of the present invention. detailed description
- a distributed probability dynamic interference coordination scheme which introduces the ALOHA mechanism into dynamic interference coordination.
- the basic idea of the invention is:
- User equipment can be divided into two categories: central users and edge users;
- the user equipment i is regarded as an edge user; ⁇ Otherwise, the user equipment i is regarded as Central user.
- the user equipment i is considered as an edge user
- (B) Define the neighboring base station (near the serving base station) on the first lap of the serving base station as the relevant base station.
- Edge users are the main cause of inter-cell interference. Therefore, probabilistic dynamic interference coordination is performed for edge users. Probabilistic dynamic interference coordination scheme
- the scheduler assigns the resource to the edge user with probability P (0 ⁇ p ⁇ 1), and the probability of not assigning the resource to the edge user A is 1- p. If it is determined according to the random decision that the edge user A cannot be scheduled, the scheduler will attempt to allocate the resource to the next user in the scheduling list (determined according to the scheduling algorithm).
- the scheduler If the scheduler is to allocate resources to edge user A, the scheduler notifies all relevant base stations of edge user A of the resource allocation information, and the scheduler obtains scheduling information from all relevant base stations.
- FIG. 2 shows a detailed flow chart of a resource scheduling method in accordance with the present invention. Referring to FIG. 2, first in step S200, resources to be scheduled are selected from the scheduling list determined according to the scheduling algorithm.
- step S201 the first user equipment A to be scheduled is selected from the scheduling list determined according to the scheduling algorithm. That is, the resource selected in step S200 is prepared to be allocated to the first user equipment eight selected in step S201.
- step S202 it is determined whether the first user equipment A is an edge user, preferably, may be determined according to U) in the above-mentioned theoretical overview section.
- step S210 the resource scheduled to be scheduled for the first user equipment A is allocated to the first user equipment A, and the resource scheduling of the first user equipment A is completed, and the process proceeds to step S200, and the process proceeds to step S200.
- the next resource to be scheduled is allocated to the first user equipment A, and the resource scheduling of the first user equipment A is completed, and the process proceeds to step S200, and the process proceeds to step S200. The next resource to be scheduled.
- step S203 the information about preparing to allocate resources to the first user equipment A is notified to all relevant base stations of the first user equipment A, thereby, from the first All relevant base stations of user equipment A obtain scheduling information.
- step S204 according to scheduling information obtained from all relevant base stations of the first user equipment A, it is determined whether all relevant base stations of the first user equipment A are to allocate resources to be scheduled to the first user equipment A to the relevant base station. The second user device of the edge user.
- step S210 the resources scheduled to be scheduled for the first user equipment A are allocated to the first user equipment A, The resource scheduling of the first user equipment A is completed, and the process goes to step S200 to select the next resource to be scheduled.
- step S206 A random number R e (0, 1).
- step S208 it is determined whether the generated random number R is smaller than a pre-set or dynamically adjustable probability P (0 ⁇ p ⁇ 1). If it is determined that the generated random number R is smaller than the probability p, then in step S210, the resource to be scheduled for the first user equipment A is allocated to the first user equipment A, and the resource scheduling of the first user equipment A is completed, and the process proceeds to step S200. Select the next resource to schedule.
- step S200 determines whether the resource selected in step S200 cannot be allocated to the first user equipment A selected in step S201.
- the next first user equipment A' to be scheduled is selected from the scheduling list determined according to the scheduling algorithm. That is, it is attempted to allocate the resource selected in step S200 to the next first user equipment A' reselected in step S201. It should be noted that steps S203 and S204 of information interaction with the relevant base station in Fig. 2 are not necessarily performed.
- blind probability resource scheduling may be performed, that is, steps S203 and S204 are omitted, and when it is determined that the first user equipment A is an edge user, a random decision based on the random number R and the probability p is directly performed, and thus the basis is executed.
- Resource probability allocation of the present invention FIG. 3 shows a detailed block diagram of a scheduler 300 in accordance with the present invention.
- the scheduler 300 includes: a resource selection unit 310, configured to select a resource to be scheduled from a scheduling list determined according to a scheduling algorithm; a user equipment (UE) selecting unit 320, configured to The first UE A to be scheduled is selected in the scheduling list determined by the algorithm, that is, the resource selected by the resource selecting unit 310 is ready to be allocated to the first UE A selected by the UE selecting unit 320; the edge user determining unit 330 is configured to determine Whether the first UE A is an edge user, preferably, may be determined according to (1) in the above theoretical overview section; the resource allocation information notification unit 340 is configured to determine, at the edge user determining unit 330, the first UE A When it is an edge user, the information about the resources to be allocated to the first UE A is notified to all relevant BSs of the first UE A; the scheduling information receiving unit 350 is configured to obtain scheduling information from all relevant BSs; a determining unit 360, configured to determine, according to scheduling information obtained from
- the resource probability allocation unit 390 may include: a random number generating unit 370 for generating a random number Re (0, 1); a random decision unit 375, configured to determine whether the generated random number is smaller than the probability p; Minute
- the allocating unit 380 is configured to allocate the resource selected by the resource selecting unit 310 to the first UE A.
- the resource allocating unit 380 allocates the resource selected by the resource selecting unit 310 to the first UE A.
- the edge user determining unit 330 determines that the first UE A is an edge user
- the related BS allocation determining unit 360 operates.
- the related BS allocation determining unit 360 determines that at least one related BS C may allocate resources scheduled to be scheduled to the first UE A to the second UE B of the at least one related BS C
- the random number generating unit 370 operates .
- the resource allocating unit 380 allocates the resource selected by the resource selecting unit 310 to the first UE A.
- the resource allocating unit 380 allocates the resources selected by the resource selecting unit 31 0 Giving the first UE A.
- the UE selecting unit 320 selects the next first UE A' to be scheduled from the scheduling list. That is, an attempt is made to allocate the resource selected by the resource selection unit 310 to the next first UE A' reselected by the UE selection unit 320.
- the units 340-360 that interact with the relevant base stations in Figure 3 are not required units. In the simple case of performing blind probability resource scheduling, the units 340-360 may be omitted, and when the edge user determining unit 330 determines that the first UE A is an edge user, the resource probability assigning unit 365 directly operates. Fig.
- the base station 1 and base station 2 comprise separate scheduler subsystems.
- the base station 1 is a serving base station of the user equipment 1 and the user equipment 3, and the base station 2 is a serving base station of the user equipment 2 and the user equipment 4.
- User equipment 1 and user equipment 1 are edge users, and user equipment 3 and user equipment 4 are central users.
- the central user and the edge user can be determined based on (1) (A) in the above theoretical overview.
- (2) (A) in the above general overview the relevant base station of the user equipment 1 is the base station 2, and the relevant base station of the user equipment 2 is the base station 1. If the user equipment 1 and the user equipment 2 are scheduled at the same time, the interference may be large and the performance is deteriorated.
- the base station 1 will notify the base station 2 of the information to be scheduled for the edge user (user equipment 1), and the base station 2 will also notify the base station 1 of the information to be scheduled for the edge user (user equipment 2).
- the probability that user equipment 1 (user equipment 2) is scheduled is p ( 0 ⁇ p ⁇ 1), and the probability of not being scheduled is lp. If User Equipment 1 (User Equipment 2) is not scheduled, resources are allocated to other User Equipments, for example, User Equipment 3 (User Equipment 4). The probability that user equipment 1 and user equipment 2 are scheduled at the same time is reduced to p*p, thus effectively reducing interference, and resources are effectively reused by other user equipment.
- Table 2 shows the performance comparison of the simulation results of the present invention with the prior art. For the sake of simplicity, a blind probability scheme with no information exchange between base stations is employed (i.e., steps S203 and S204 above are omitted). If the edge user is scheduled, the resource is allocated with the probability p, and the resource is not allocated to it with the probability 1-p.
- the simulation results shown in Table 2 are based on the LTE uplink system, and Table 1 shows the specific simulation parameters (see reference [5]).
- the simulation results show that the above blind probability scheme according to the present invention can achieve a gain of 6% in terms of edge user throughput (5% throughput) and a small increase (1.4%) in the average throughput of the cell. Since there is no information exchange between base stations, scheduling is performed with blind information, whether or not there is known information of the user of the neighboring cell edge that is transmitting data.
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Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09840614.3A EP2403305A4 (en) | 2009-02-24 | 2009-02-24 | RESOURCE PLANNING METHOD, PROGRAMMER AND BASE STATION |
BRPI0924256A BRPI0924256A2 (pt) | 2009-02-24 | 2009-02-24 | método de programação de recurso, programador e estação de base. |
CN200980150486.4A CN102246571B (zh) | 2009-02-24 | 2009-02-24 | 资源调度方法、调度器和基站 |
PCT/CN2009/000194 WO2010096946A1 (zh) | 2009-02-24 | 2009-02-24 | 资源调度方法、调度器和基站 |
JP2011551382A JP5307904B2 (ja) | 2009-02-24 | 2009-02-24 | リソーススケジューリング方法、スケジューラ、および基地局 |
US13/202,908 US9107233B2 (en) | 2009-02-24 | 2009-02-24 | Resource scheduling method, scheduler and base station |
KR20117022039A KR101489704B1 (ko) | 2009-02-24 | 2009-02-24 | 자원 스케줄링 방법, 스케줄러 및 기지국 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2009/000194 WO2010096946A1 (zh) | 2009-02-24 | 2009-02-24 | 资源调度方法、调度器和基站 |
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WO2010096946A1 true WO2010096946A1 (zh) | 2010-09-02 |
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Family Applications (1)
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PCT/CN2009/000194 WO2010096946A1 (zh) | 2009-02-24 | 2009-02-24 | 资源调度方法、调度器和基站 |
Country Status (7)
Country | Link |
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US (1) | US9107233B2 (zh) |
EP (1) | EP2403305A4 (zh) |
JP (1) | JP5307904B2 (zh) |
KR (1) | KR101489704B1 (zh) |
CN (1) | CN102246571B (zh) |
BR (1) | BRPI0924256A2 (zh) |
WO (1) | WO2010096946A1 (zh) |
Cited By (2)
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JP2011188164A (ja) * | 2010-03-08 | 2011-09-22 | Fujitsu Ltd | 基地局装置および通信帯域割り当て方法 |
US20130215784A1 (en) * | 2010-11-10 | 2013-08-22 | Telefonaktiebolaget L M Ericsson (Publ) | Radio Base Station and a Method Therein |
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US8243670B2 (en) * | 2009-08-19 | 2012-08-14 | Chunghwa Telecom Co., Ltd. | User grouping method for inter-cell interference coordination in mobile telecommunication |
EP2684414B1 (en) * | 2011-03-11 | 2017-05-10 | Telefonaktiebolaget LM Ericsson (publ) | A radio base station and a method therein for scheduling radio resources |
JP6916446B2 (ja) * | 2018-09-13 | 2021-08-11 | 日本電信電話株式会社 | 基地局管理方法、基地局管理装置及びプログラム |
US11064463B2 (en) * | 2018-10-03 | 2021-07-13 | The Boeing Company | Systems and methods for reuse of spectrum resources |
EP3832464B1 (en) * | 2019-12-06 | 2024-07-10 | Tata Consultancy Services Limited | System and method for selection of cloud service providers in a multi-cloud |
WO2023144447A1 (en) * | 2022-01-26 | 2023-08-03 | Greatest Heroes Oy | Polarization switching |
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2009
- 2009-02-24 WO PCT/CN2009/000194 patent/WO2010096946A1/zh active Application Filing
- 2009-02-24 KR KR20117022039A patent/KR101489704B1/ko active IP Right Grant
- 2009-02-24 US US13/202,908 patent/US9107233B2/en not_active Expired - Fee Related
- 2009-02-24 BR BRPI0924256A patent/BRPI0924256A2/pt not_active Application Discontinuation
- 2009-02-24 CN CN200980150486.4A patent/CN102246571B/zh active Active
- 2009-02-24 EP EP09840614.3A patent/EP2403305A4/en not_active Withdrawn
- 2009-02-24 JP JP2011551382A patent/JP5307904B2/ja not_active Expired - Fee Related
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Also Published As
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JP2012518957A (ja) | 2012-08-16 |
KR101489704B1 (ko) | 2015-02-11 |
US20110300873A1 (en) | 2011-12-08 |
US9107233B2 (en) | 2015-08-11 |
BRPI0924256A2 (pt) | 2016-01-26 |
CN102246571A (zh) | 2011-11-16 |
JP5307904B2 (ja) | 2013-10-02 |
EP2403305A4 (en) | 2016-04-06 |
KR20110119817A (ko) | 2011-11-02 |
CN102246571B (zh) | 2015-12-16 |
EP2403305A1 (en) | 2012-01-04 |
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