Background technology
3G (Third Generation) Moblie Long Term Evolution (Long Term Evolution, referred to as LTE) " universal land radio access web (the Evolved Universal Terrestrial Radio AccessNetwork of evolution of system, referred to as E-UTRAN, formed by base station eNB, therefore also can be called base station eNB) " wave point media access control (Media Access Control, referred to as MAC) protocol layer, there is scheduling/processed (Scheduling/Priority handling) functional entity, wherein, scheduling feature is supported dynamic dispatching (Dynamic scheduling) and semi-persistent scheduling (Semi-persistentScheduling, or be called semi-persistent scheduling, be called for short SPS).
Dynamic dispatching (Dynamic Scheduling) refers to, E-UTRAN can pass through Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as PDCCH) on Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network Temporary Identifier, referred to as C-RNTI) at each Transmission Time Interval (Transmit Time Interval, referred to as TTI, corresponding to a subframe (subframe)) receive/send data to subscriber equipment (UE) dynamic assignment resource for UE, resource comprises Physical Resource Block (Physical Resource Block, referred to as PRB) and Modulation and Coding Scheme (Modulation and Coding Scheme, referred to as MCS) etc.The head of UE mixed automatic retransfer request (Hybrid ARQ, referred to as HARQ) passes and HARQ re-transmission all can be used dynamic dispatching.
Semi-persistent scheduling (Semi-persistent Scheduling:SPS) refers to, E-UTRAN can receive/send data for UE distributes semipersistent resource for UE by the semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI on PDCCH (Semi-PersistentScheduling C-RNTI:SPS C-RNTI), and resource comprises Physical Resource Block PRB, Modulation and Coding Scheme MCS etc.In semi-persistent scheduling, the first biography of the HARQ of UE used semipersistent resource, and HARQ retransmits the resource that uses dynamic dispatching.Semipersistent resource repeated to occur according to the configured cycle, be configured with the subframe (Subframe) of semipersistent resource at UE, if UE does not monitor its C-RNTI on PDCCH, receive/send according to semipersistent resource in corresponding subframe.Be configured with the subframe of semipersistent resource at UE, if UE monitors its C-RNTI on PDCCH, use the dynamic resource of PDCCH instruction to substitute (Override) semipersistent resource in corresponding subframe.
Typically, semi-persistent scheduling is applied to VoIP business, for the semipersistent resource of its distribution is taking 20ms as the cycle.E-UTRAN is by Radio Resource control (Radio Resource Control, referred to as RRC) signaling is UE configuration semi-persistent scheduling parameter, comprises semi-persistent scheduling community-Radio Network Temporary Identifier, the configuration of descending semi-persistent scheduling, up semi-persistent scheduling configuration etc.Descending/up semi-persistent scheduling parameter can configure respectively, descending semi-persistent scheduling parameter comprises descending semi-persistent scheduling cycle, the reserved information such as HARO process number, PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) feedback resources; Up semi-persistent scheduling parameter comprises up semi-persistent scheduling cycle, implicit expression dropout value, PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) information such as relevant parameter, also comprise two cycle configuration informations for TDD (time division multiplexing) pattern.E-UTRAN enables/goes to enable (enable/disable) descending/up semi-persistent scheduling by RRC signaling, and in the time that descending/up semi-persistent scheduling goes to enable, corresponding semipersistent resource is released.LTE frequency division multiplex (Frequency Divided Duplex:FDD) pattern is at descending/up one-period of supporting at most respectively.Time division multiplexing (Time Divided Duplex:TDD) pattern is at the descending one-period of only supporting, up two cycles of support be configured to avoid HARQ to retransmit and the conflict of semipersistent resource when the first biography of HARQ.Descending, E-UTRAN is the reserved HARO process number of UE configuration semi-persistent scheduling by RRC, and dynamic dispatching can be shared the HARO process of keeping for semi-persistent scheduling.Up, dynamic dispatching and semi-persistent scheduling also can be shared same HARO process.E-UTRAN is that UE activates semipersistent resource by PDCCH.In order to reduce the complexity of semi-persistent scheduling, semipersistent resource is distributed to whole UE, instead of distributes to certain concrete business.Descending/up maximum difference only configure a semipersistent resource (comprising the information such as PRB, MCS), and this semipersistent resource configures according to RRC signaling, and descending/up semi-persistent scheduling cycle occurs.E-UTRAN is by descending/up semipersistent resource of the explicit release of PDCCH UE.Up, also support implicit expression to discharge semipersistent resource, UE triggers semipersistent resource according to several continuous new MACPDU (media access control protocol data unit) that comprise 0 MAC SDU (media access control Service Data Unit) and discharges.
In order to meet the demand of growing large bandwidth high-speed mobile access, third generation partnership project (Third Generation Partnership Proiects, be called for short 3GPP) release senior Long Term Evolution (Long-Term Evolution advance, be called for short LTE-Advanced) standard.LTE-Advanced adopts series of new techniques to expand frequency domain, spatial domain on LTE basis, improves the availability of frequency spectrum, increases the objects such as power system capacity to reach.Wherein carrier aggregation technology can the two or more component carriers of polymerization (Component Carrier) to support wider frequency band, for example, arrive 100MHz and spectrum aggregating.UE can receive simultaneously/send data on one or more component carriers, can be configured in the different numbers of descending/up gathering and have the component carrier of different bandwidth.The corresponding HARQ entity of each component carrier and transmission channel.On each component carrier, there is respectively an independent PDCCH to indicate the resource on resource distribution or other component carrier on this component carrier to distribute, on PDCCH, have 0～3bit instruction component carrier identification information.
In LTE system, if have multiple business to be applicable to semi-persistent scheduling descending and/or up, need to consider service quality (the Quality of Service:QoS) requirement of different business, at the descending and/or up recurrent semipersistent resource that configures respectively at most 1 group of unified semi-persistent scheduling parameter and 1 unification.Cause to a certain extent the dumb or waste of radio resources of semi-persistent scheduling, sometimes have to utilize dynamic dispatching to compensate, waste PDCCH resource.In LTE-Advanced system carrier aggregation technology, also there is no the solution of semi-persistent scheduling at present.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multicarrier semi-persistent scheduling method and system, realize the semi-persistent scheduling in LTE-Advanced system carrier aggregation technology, and semi-durable dispatching flexibility is good under multi-service circumstances, wireless resource utility efficiency is high.
In order to address the above problem, the invention provides a kind of semi-persistent scheduling method, comprising: configure one or more component carriers for semi-persistent scheduling; For described each component carrier for semi-persistent scheduling configures corresponding semi-persistent scheduling parameter; For described each component carrier for semi-persistent scheduling independently activates and distributes corresponding semipersistent resource.
Further, said method also can have following characteristics, and described semi-persistent scheduling is up and/or descending semi-persistent scheduling.
Further, said method also can have following characteristics, and the semi-persistent scheduling parameter of different component carrier configurations is identical or different, and the semi-persistent scheduling parameter of same component carrier configuration is identical or different in uplink and downlink.
Further, said method also can have following characteristics, described method also comprises: configure the hybrid automatic repeat request process number for semi-persistent scheduling on described component carrier by radio resource control signaling, the hybrid automatic repeat request process number for semi-persistent scheduling on different component carriers is identical or different.
Further, said method also can have following characteristics, and at least having its semi-persistent scheduling cycle of a component carrier and the length in the semi-persistent scheduling cycle of another component carrier is at least integral multiple relation; The described semi-persistent scheduling cycle is the up and/or descending semi-persistent scheduling cycle.
Further, said method also can have following characteristics, for different component carriers activate and the semipersistent resource that distributes identical or different, for same component carrier activate and the semipersistent resource that distributes identical or different in uplink and downlink.
Further, said method also can have following characteristics, and the subframe position being positioned at when at least existing a component carrier to activate and distributing its semipersistent resource is with at least the recurrent subframe position of the above semipersistent resource of another component carrier is identical.
Further, said method also can have following characteristics, activate and distribute the semipersistent resource of different component carriers in identical or different subframe, to the same component carrier of collocating uplink and descending semi-persistent scheduling, activate and distribute the uplink and downlink semipersistent resource of described component carrier in identical or different subframe.
Further, said method also can have following characteristics, and the subframe that the semipersistent resource on described component carrier occurs is positioned at the duration of the discontinuous reception of this component carrier.
The present invention also provides a kind of semi-persistent scheduling system, comprising:
Configuration module, for configuring one or more component carriers for semi-persistent scheduling, for described each component carrier for semi-persistent scheduling configures corresponding semi-persistent scheduling parameter;
Resource distribution module, is used to and described independently activate and distribute corresponding semipersistent resource for each component carrier of semi-persistent scheduling.
Further, said system also can have following characteristics, and described configuration module, for configuring one or more component carriers for up and/or descending semi-persistent scheduling.
Further, said system also can have following characteristics, and described configuration module is used to different component carriers to configure identical or different semi-persistent scheduling parameter, for same component carrier configures identical or different uplink and downlink semi-persistent scheduling parameter.
Further, said system also can have following characteristics, described configuration module, for configuring the hybrid automatic repeat request process number for semi-persistent scheduling on described component carrier by radio resource control signaling, it is the identical or different hybrid automatic repeat request process number for semi-persistent scheduling of different component carrier configuration.
Further, said system also can have following characteristics, and described configuration module is integral multiple relation for configuring its semi-persistent scheduling cycle of at least one component carrier with the length in the semi-persistent scheduling cycle of another component carrier at least; The described semi-persistent scheduling cycle is the up and/or descending semi-persistent scheduling cycle.
Further, said system also can have following characteristics, and described resource distribution module is used to different component carriers to activate and distributes identical or different semipersistent resource, for same component carrier activates and distributes identical or different uplink and downlink semipersistent resource.
Further, said system also can have following characteristics, described resource distribution module, the subframe position being positioned at when activating and distribute its semipersistent resource at least one component carrier is with at least the recurrent subframe position of the above semipersistent resource of another component carrier is identical.
Further, said system also can have following characteristics, described resource distribution module, for activate and distribute the semipersistent resource of different component carriers in identical or different subframe, to the same component carrier of collocating uplink and descending semi-persistent scheduling, activate and distribute the uplink and downlink semipersistent resource of described component carrier in identical or different subframe.
Further, said system also can have following characteristics, described resource distribution module, and the semipersistent resource that is used to described component carrier to activate and distribute, the subframe that described semipersistent resource occurs is positioned at the duration of the discontinuous reception of this component carrier.
The present invention can configure different semi-persistent scheduling parameter and semipersistent resource for different component carriers in carrier aggregation technology, support that on different component carriers, semipersistent resource activates respectively or discharges, scheduling flexibly, improve the utilance of Radio Resource, better adaptive multi-service qos requirement.Because can tying up to some subframe according to certain cycle multiple pass, semipersistent resource on different component carriers occurs in addition simultaneously, thereby allow UE to carry out semi-persistent scheduling in some predetermined subframe for corresponding component carrier simultaneously, and the subframe that does not have semipersistent resource to occur is carried out discontinuous reception (DRX), be beneficial to UE power saving on some component carrier.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
The semi-persistent scheduling method that the invention provides carrier wave specific (Component carrier specific) in a kind of carrier aggregation technology, comprising:
Configure one or more component carriers for semi-persistent scheduling; For configuring corresponding semi-persistent scheduling parameter for each component carrier of semi-persistent scheduling; For independently activating for each component carrier of semi-persistent scheduling and distributing corresponding semipersistent resource.The described semipersistent resource activating and distribute periodically occurs according to the descending and/or up semi-persistent scheduling cycle parameter being configured on this component carrier.
Wherein, for semi-persistent scheduling, in RRC signaling, comprise the identification information of component carrier by the one or more component carriers of one or more RRC signal deployments, in RRC signaling, the identification information of component carrier and corresponding semi-persistent scheduling parameter correlation are joined.Number by RRC signal deployment for the component carrier of semi-persistent scheduling.
Configure one or more component carriers and refer to for semi-persistent scheduling, collocating uplink and/or descending semi-persistent scheduling on one or more component carriers, can collocating uplink and descending semi-persistent scheduling on same component carrier.Descending and up semi-persistent scheduling can use with 1 component carrier, or uses different component carriers; For example configuring respectively semi-persistent scheduling with the descending and up of 1 component carrier, or the downstream arrangements semi-persistent scheduling of 1 component carrier, the up configuration semi-persistent scheduling of another 1 component carrier.
By the semi-persistent scheduling parameter on one or more component carriers described in one or more RRC signal deployments.The semi-persistent scheduling parameter of same component carrier configuration descending and up can be identical or different; The described semi-persistent scheduling parameter of different component carriers can be identical or different.
Descending and up at same component carrier: in the uplink and downlink semi-persistent scheduling parameter of identical or different this component carrier of sub-frame configuration; The uplink and downlink semi-persistent scheduling parameter of same component carrier can separate configurations or configuration simultaneously.
Component carrier to different: in the semi-persistent scheduling parameter of the identical or different each component carrier of sub-frame configuration; The semi-persistent scheduling parameter of different component carriers can separate configurations or configuration simultaneously.
Described semi-persistent scheduling parameter at least includes but not limited to one or more in following parameter: semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (semiPersistSchedC-RNTI), the descending semi-persistent scheduling cycle (semiPersistSchedIntervalDL), descending semi-persistent scheduling is reserved HARQ process number (numberOfConfSPS-Processes), descending semi-persistent scheduling PUCCH feedback resources (n1-PUCCH-AN-PersistentList), the up semi-persistent scheduling cycle (semiPersistSchedIntervalUL), up semi-persistent scheduling implicit expression discharges empty transmission times (implicitReleaseAfter), up semi-persistent scheduling PUSCH relevant parameter (p0-Persistent: comprise p0-NominalPUSCH-Persistent, and the parameter such as tdd mode two cycles configurations (twoIntervalsConfig) p0-UE-PUSCH-Persistent).
Wherein, by the HARQ process number for semi-persistent scheduling on the each component carrier of RRC signal deployment.Can be identical or different for the HARQ process number of semi-persistent scheduling on different component carriers.
At least having its semi-persistent scheduling cycle of a component carrier and the length in the semi-persistent scheduling cycle of another component carrier is at least integral multiple relation; The described semi-persistent scheduling cycle is the up and/or descending semi-persistent scheduling cycle.Specifically can be: have a component carrier, the length in the semi-persistent scheduling cycle of all the other component carriers is the integral multiple of the length in this component carrier semi-persistent scheduling cycle.Also may be that the length in the descending semi-persistent scheduling cycle in the semi-persistent scheduling parameter of different component carriers is integral multiple relation; And/or the length in up semi-persistent scheduling cycle in the semi-persistent scheduling parameter of different component carriers is integral multiple relation.
Wherein, activate by PDCCH signaling and distribute described semipersistent resource.To one-component carrier wave, activate and distribute the semipersistent resource on this component carrier by the PDCCH on the PDCCH on this component carrier or other component carrier.
To same component carrier, activate and the semipersistent resource that distributes descending and up can be identical or different, activate and distribute the uplink and downlink semipersistent resource on same component carrier in identical or different subframe.For different component carriers activate and the semipersistent resource that distributes can be identical or different, activate and distribute the semipersistent resource of described component carrier in identical or different subframe.
The subframe position being positioned at when at least existing a component carrier to activate and distributing its semipersistent resource is with at least the recurrent subframe position of the above semipersistent resource of another component carrier is identical.
When activating on different component carriers and distributing described semipersistent resource to be positioned at different subframes, the subframe being positioned at when activating on certain component carrier and distributing described semipersistent resource is in recurrent certain subframe of the above semipersistent resource of another component carrier, thereby makes the semipersistent resource cycle on different component carriers occur in some identical subframe.The method makes semipersistent resource on different component carriers to close and tie up to some subframe and occur simultaneously according to certain cycle multiple, thereby allow UE to carry out semi-persistent scheduling in some predetermined subframe for corresponding component carrier simultaneously, and the subframe that does not have semipersistent resource to occur is carried out discontinuous reception (DRX), be beneficial to UE power saving on some component carrier.
Wherein, the subframe that on component carrier, semipersistent resource occurs is positioned at the duration (On-duration time) of the discontinuous reception of this component carrier (DRX:Discontinuous Reception).
Wherein, carrier wave semipersistent resource being close with carrier capability is corresponding.The information such as PRB, MCS that the bandwidth of this component carrier and transmittability and semipersistent resource configure is close.
Described method also comprises, discharges or discharge respectively simultaneously the semipersistent resource on different component carriers.The release of semipersistent resource is comprised to two kinds:
A) enable/go to enable (enable/disable) partly or entirely descending/up semi-persistent scheduling of component carrier by RRC signaling, in the time that descending/up semi-persistent scheduling goes to enable, semi-persistent scheduling parameter and the semipersistent resource of respective component carrier wave are released.Can remove to enable the semi-persistent scheduling on different component carriers by one or more RRC signalings.
B) also can discharge the semipersistent resource on each component carrier by PDCCH signaling, to one-component carrier wave, discharge its semipersistent resource by the PDCCH on the PDCCH on this component carrier or other component carrier.Can discharge the semipersistent resource on different component carriers by PDCCH signaling at the same time or separately.
Up, discharge described semipersistent resource by implicit, the semipersistent resource on different component carriers can discharge simultaneously, or discharges respectively.
Wherein, the described component carrier for semi-persistent scheduling is also for dynamic dispatching.
Wherein, described method comprises, in semi-persistent scheduling process, reconfigures other one or more component carriers for semi-persistent scheduling by RRC signaling, and discharges one or more component carriers for semi-persistent scheduling originally.
Fig. 1 shows according to the preferred embodiment of the present invention 1 semi-persistent scheduling method flow chart, and step is as follows:
Step 110: be used for the component carrier of semi-persistent scheduling by RRC signal deployment, be configured for the semi-persistent scheduling parameter of above-mentioned component carrier, as information such as semi-persistent scheduling cycles.
Each component carrier can use identical RRC signal deployment or use different RRC signalings to configure respectively.
Step 120: at the component carrier for semi-persistent scheduling, activate by PDCCH respectively and distribute the semipersistent resource on this component carrier.Semipersistent resource on each component carrier can activate simultaneously and distribute or activate respectively and distribute in different subframes.
Step 130: at the component carrier for semi-persistent scheduling, carry out semi-persistent scheduling according to configured semi-persistent scheduling parameter and semipersistent resource respectively.
Step 140: at the component carrier for semi-persistent scheduling, receive the deexcitation signaling on PDCCH or receive RRC and go to enable signaling, discharge semipersistent resource.Each component carrier can receive PDCCH deexcitation signaling simultaneously or RRC goes to enable signaling, or receives respectively PDCCH deexcitation signaling or RRC goes to enable signaling in different subframes.
Flow process shown in Fig. 1 is applicable to scene described in following each embodiment 2,3,4 and 5.
Fig. 2 shows the scene schematic diagram according to the preferred embodiment of the present invention 2, is described as follows:
UE has configured 4 downlink component carriers altogether, wherein has 2 component carriers also for up.UE has two kinds of qos requirements to be applicable to semi-persistent scheduling, and configuration wherein 2 component carriers is used for semi-persistent scheduling.The semi-persistent scheduling cycle that wherein component carrier 1 configures is 20ms, and the semi-persistent scheduling cycle that component carrier 2 configures is 40ms.Two component carriers have configured respectively two groups of semi-persistent scheduling parameters, and (two groups of semi-persistent scheduling parameters can be identical or one or more parameter differences wherein, the cycle difference of for example semi-persistent scheduling; If two is all descending semi-persistent scheduling, the HARQ process number configuring may be not equal).The semi-persistent scheduling cycle configuring on two component carriers is the subframe alignment that integral multiple and semipersistent resource occur.Two component carriers have configured respectively two recurrent semipersistent resources (two semipersistent resources can be identical or wherein one or more resource differences, for example PRB, MCS difference).
Based on the comprehensive description of above-mentioned scene, distinguish further various point of scene, be described below:
Point scene 1: establishing UE has two kinds of descending qos requirements to be applicable to semi-persistent scheduling, and component carrier 1 and component carrier 2 are descending.
Point scene 2: establishing UE has 1 descending qos requirement to be applicable to semi-persistent scheduling, 1 up qos requirement is applicable to semi-persistent scheduling, and component carrier 1 is descending, and component carrier 2 is up.
In another embodiment of the present invention, UE has two kinds of qos requirements to be applicable to semi-persistent scheduling, and establishing UE has 1 descending qos requirement to be applicable to semi-persistent scheduling, and 1 up qos requirement is applicable to semi-persistent scheduling, collocating uplink and descending semi-persistent scheduling on one-component carrier wave.Wherein the up semi-persistent scheduling cycle is 20ms, and the descending semi-persistent scheduling cycle is 40ms.For example, for uplink and downlink semi-persistent scheduling has configured respectively two groups of semi-persistent scheduling parameters (two groups of semi-persistent scheduling parameters can be identical or one or more parameter differences wherein, the cycle difference of semi-persistent scheduling).The uplink and downlink semi-persistent scheduling cycle is the subframe alignment that integral multiple and semipersistent resource occur.For example, for uplink and downlink semi-persistent scheduling has configured respectively two recurrent semipersistent resources (two semipersistent resources can be identical or wherein one or more resource differences, PRB, MCS difference).
Fig. 3 shows the scene schematic diagram according to the preferred embodiment of the present invention 3, is described as follows:
UE has configured semi-persistent scheduling (establish component carrier 1 and component carrier 2 is downlink component carrier) at two downlink component carriers; Or 1 downlink component carrier and 1 upstream components carrier wave (establish component carrier 1 for downlink component carrier, component carrier 2 is upstream components carrier wave) have configured semi-persistent scheduling.On two component carriers, semi-durable dispatching cycle, difference was not multiple relation yet, and the subframe that semipersistent resource occurs does not line up.
Fig. 4 shows the scene schematic diagram according to the preferred embodiment of the present invention 4, is described as follows:
UE, at two downlink component carriers (establish component carrier 1 and component carrier 2 is downlink component carrier) configuration semi-persistent scheduling, has configured semi-persistent scheduling at a upstream components carrier wave (establishing component carrier 3 for upstream components carrier wave); Or at 1 downlink component carrier (establishing component carrier 1 downlink component carrier) configuration semi-persistent scheduling, configure semi-persistent scheduling at two upstream components carrier waves (establish component carrier 2 and component carrier 3 is upstream components carrier wave).The semi-persistent scheduling cycle configuring on each component carrier is the subframe alignment that integral multiple and semipersistent resource occur.
Fig. 5 shows the scene schematic diagram according to the preferred embodiment of the present invention 5, is described as follows:
If component carrier 1 and component carrier 2 are the descending and up component carrier of all supporting, on these two component carriers, all configure descending and up semi-persistent scheduling.The semi-persistent scheduling cycle (comprising up semi-persistent scheduling cycle and descending semi-persistent scheduling cycle) configuring on each component carrier is the subframe alignment of integral multiple and semipersistent resource generation.
The present invention also provides a kind of semi-persistent scheduling system, comprising:
Configuration module, for configuring one or more component carriers for semi-persistent scheduling, for described each component carrier for semi-persistent scheduling configures corresponding semi-persistent scheduling parameter;
Resource distribution module, is used to and described independently activate and distribute corresponding semipersistent resource for each component carrier of semi-persistent scheduling.
How configuration module specifically configures component carrier, and how resource distribution module specifically to distribute semipersistent resource to see above described in face embodiment of the method, repeats no more herein.
As can be seen from the above description, above-described embodiment is compared with the semi-persistent scheduling scheme in LTE system, the specific semi-persistent scheduling scheme of the present invention's carrier wave in carrier aggregation technology has improved dispatching flexibility and wireless resource utility efficiency, adaptive multi-service qos requirement better, and be more conducive to UE economize on electricity.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.