CN101137241B - User equipment and method to improve high speed downlink shared control channel cell change - Google Patents
User equipment and method to improve high speed downlink shared control channel cell change Download PDFInfo
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- CN101137241B CN101137241B CN2007101538149A CN200710153814A CN101137241B CN 101137241 B CN101137241 B CN 101137241B CN 2007101538149 A CN2007101538149 A CN 2007101538149A CN 200710153814 A CN200710153814 A CN 200710153814A CN 101137241 B CN101137241 B CN 101137241B
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- 230000003139 buffering effect Effects 0.000 claims description 18
- 230000008707 rearrangement Effects 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 38
- 238000011084 recovery Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 8
- 230000015654 memory Effects 0.000 description 4
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- 238000013461 design Methods 0.000 description 2
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- 230000003044 adaptive effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
- H04W36/023—Buffering or recovering information during reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
Abstract
The present invention relates to efficient recovery of High Speed Downlink Packet Access (HSDPA) data following handover. The present invention discloses a method and system for the UE to perform a serial of actions in order to reduce the latency and potentially prevent loss of PDU transmission during the serving HS-DSCH cell change procedure. A new criterion is introduced for UE generation of the status report of RLC PDU. The UE generates status report of the PDUs as soon as possible following notification of the HS-DSCH cell change indicated by the RRC procedure to more efficiently recover source Node B buffered data. PDU status may be signaled for each AM RLC instance associated with the HS-DSCH transport channel. Furthermore, upon Inter Node B serving HS-DSCH cell change the SRNC may wait for PDU status report before initiating transmission of new data in target cell.
Description
Related application
The application is that application number is 03807731.0 (the PCT international application no is PCT/US03/10037), the applying date to be the dividing an application of Chinese invention patent application on April 2nd, 2003.
Technical field
The present invention relates to the field of radio communication.More specifically say, after the present invention relates in the wireless system that distributes from the data of intermediate point, switch to the efficient recovery that has of the data of buffering.Have the telecommunication network controller (RNC) that is coupled to one or more Node B and utilize adaptive modulation and coding (AMC) and the third generation (3G) system that hybrid automatic repeat requests (H-ARQ) technology wirelessly is coupled to a plurality of subscriber equipmenies (UE) successively is merely an instance of this system.
Background technology
3G Universal Terrestrial Radio Access Network network (UTRAN) comprises several RNC, and wherein each RNC all can be coupled on several Node B.Node B is the entity that comprises one or more base stations, and wherein each BTS management is for the business of one or more sub-districts.
3G FDD and TDD system typically use RNC to cushion and scheduled transmission to the data of UE.Yet, with regard to the IA High Speed Channel of 3G cellular system, be by Node B cushion and data dispatching be used for the transmission.One in these IA High Speed Channels for example is high-speed downlink shared channel (HS-DSCH).Because data are to be distributed by Node B, the data buffering that must will be used for transmitting is at Node B.Such system causes RNC can not obtain the last state of the Node B that Packet Data Unit (PDU) controlled.Therefore, in case when switching, then must coordinate to have the scheduling of the transfer of data of cell change in the minizone.Otherwise, behind cell change, the loss of data or the re-transmitted that need again synchrodata to be transmitted to avoid.In 3G network, by the switching between the RNC control sub-district.Therefore the control RNC that comprises the sub-district of UE can change, so data might be lost or repeat because of this switching.Because each RNC is associated with several Node B in this system, causes this problem more serious.Because needing RNC to change more than it, the switching of UE sub-district, the possibility that therefore moving UE needs Node B to change be greater.
HS-DSCH utilizes AMC to make it possible to high speed transmission data, and utilizes H-ARQ to increase the possibility of successful Data transmission.When this UE must change the cell associated of the UTRAN access point of carrying out transmission and reception service HS-DSCH radio link, service HS-DSCH cell change.When physical channel conditions that in the sub-district of replacement, has realized improving and/or physical capacity, then call service HS-SDCH cell change.The RNC place of other channel in UTRAN that is different from the 3G network stops, and HS-DSCH stops at Node B place.
The type that has two kinds of HS-DSCH cell changes.When UE with two sub-districts that identical Node B is associated between when changing, then be the service HS-DSCH cell change in the Node B.When this UE with two sub-districts that different N ode B is associated between when changing, then be the service HS-DSCH cell change between the Node B.In the cell change between Node B, the Node B before this service HS-DSCH cell change is called source Node B, and will serve the HS-DSCH cell change after Node B be called target Node B.
Equal radio link control (RLC) entity is all arranged among RNC and the UE, be provided for automatic re-send request may (ARQ) function of the transmission of data.This transmission RLC entity transmits Sequence Number (SN) with signal in the PDU header, receives the RLC entity and utilizes this sequence number not lose PDU to guarantee current transmission.If between current transmission period, lost PDU (because of not transmitting in order due to the PDU), then receive RLC entity status report PDU, some PDU has lost with notice transmission RLC entity.Utilize the state of this status report PDU with the declarative data transmission.Wherein this status report PDU identifies the SN of the PDU that loses or receive.If lose PDU, then send the RLC entity and can the duplicate of this PDU that loses be transferred to again reception RLC.
Send the RLC entity and also possibly perhaps periodically generate status report from receiving RLC entity polling status report PDU.The function of said poll provides a kind of mechanism, supplies to send the state of the said PDU transmission of RLC entity requests.
H-ARQ function among the Node B also provides the transmission again of failed transmission.Though H-ARQ moves the success rate that the transmission of some failure is removed and improves Data transmission, what assure success transmission at last but is the rlc protocol layer.
Since the dynamic change of propagation conditions, thus the HS-DSCH cell change must be carried out apace, to keep the quality of service.During service HS-DSCH cell change, UE possibly stop transmission and reception in the cell-of-origin before current all PDU that in the Node B of source, store are successfully transmitted.Because source Node B operation dispatching and buffered data; And because said data rate very high (for example 10Mb/ second or higher); Therefore when this UE carries out service HS-DSCH cell change (the particularly switching between the NodeB), the data that are buffered in a large number among the Node B of source might be lost.One of this loss of data is former because do not provide any mechanism in order to the buffered data on the Node B of source is transferred to target Node B in the UTRAN structure.In case the HS-DSCH cell change, then owing to fail to give notice RNCNode B data transmission scheduling, so this RNC does not know that how many loss of datas are arranged (if the words that have), and this RNC do not know yet UE whether success confirmation this transmission.Therefore, when the HS-DSCH cell change data buffering when keeping the transmission of no data loss, this RNC RLC must recover these data in the Node B of source.
At present, prior art systems has two kinds of preferred modes to recover the data of buffering on the Node B of source.Behind the HS-DSCH cell change: 1) RNC can be clearly to UE solicited status PDU; Or 2) the RNC place of can be only ending in the cell-of-origin begins transmission, and not transmitting in order of recognizing of UE will generate status PDU.
In first kind of situation, wherein to ask a status PDU clearly, this RNC must at first wait for till in new sub-district, having set up physical channel RNC through poll UE.Then, this status PDU request is sent out and is received and handle by UE.UE generates status PDU, and this status PDU is sent back to RNC, and this RNC handles this status PDU and judges that which PDU needs transmission again.
In second kind of situation, wherein RNC only begins to transmit PDU from stopping place the cell-of-origin, and this UE recognizes the data of not transmitting in order and generates a status PDU and transfers back to RNC.This RNC handles this status PDU and knows which PDU needs transmission again.
In above-mentioned two kinds of situation any recovers the data that in the Node B of source, cushion if desired, can handle a status PDU, yet but seriously incured loss through delay the time that the correct reception of this UE is transmitted data again.This is to produce the time of this PDU state because of having incured loss through delay this UE, thereby has incured loss through delay the time that this RNC receives this PDU state.
If when under the RLC answer-mode, carrying out transmission, data can not be passed to high-rise up to carrying out Data transmission in order.Therefore, UE is asked to the not sequenced data of buffering, till can transmitting the PDU that is lost again.So not only caused the delay of transmission, and require this UE have enough large memories with buffered data up to can successfully transmitting the data that are stored among the Node B of source.Otherwise effective speed can be lowered, thereby influences service quality.Because memory is very expensive, so this is undesirable design limit.
Therefore, the art methods that the data that in source Node B, cushion are transferred to this buffered data of target Node B elder generation's recovery before can produce unexpected consequence.Need a kind of system and method that the buffered data of this source of efficient recovery Node B can more be arranged in the short period of time, with suitable maintenance customer's service quality demand.
Summary of the invention
The object of the invention is to provide a kind of to implement a succession of action so that during this service HS-DSCH cell changing procedure, shorten the stand-by period and prevent losing of PDU transmission potentially.Introducing a new criterion supplies UE to produce the status report of RLC PDU.After having notified the indicated HS-DSCH cell change of this RRC changeover program, this UE just automatically produces the status report of PDU as early as possible, more effectively to recover the buffered data of source Node B.Can be each answer-mode (AM) RLC example that is associated with this HS-DSCH transfer channel and transmit the PDU state with signal.
According to an aspect of the present invention; A kind of method by the high-speed downlink shared channel HS-DSCH cell change of user equipment (UE) execution that is used to promote is provided; Said UE comprises high speed media access control MAC-hs device and the rearrangement buffering area related with MAC-hs, and this method comprises that utilizing UE to receive carries the wireless signal that the radio resource related with the HS-DSCH cell change controlled the RRC request message; This method comprises following subsequent step: after receiving wireless signal, empty said rearrangement buffering area; Utilize MAC-hs device notice rearrangement buffering area to be cleared; And generate status report in response to emptying said rearrangement buffering area; Each status report is separately corresponding to the answer-mode radio link control AM RLC example that is mapped to HS-DSCH, the HS-DSCH Packet Data Unit PDU that said status report indication UE loses.
According to a further aspect in the invention; Provide a kind of being used to promote the method by the high-speed downlink shared channel HS-DSCH cell change of user equipment (UE) execution, this method comprises: utilize said UE to receive and carry the wireless signal that the radio resource related with the HS-DSCH cell change controlled the RRC request message; Empty the rearrangement buffering area that is associated with MAC-hs in response to said wireless signal; And generating status report in response to emptying said rearrangement buffering area, said status report is corresponding to the answer-mode radio link control AM RLC example that is mapped to said HS-DSCH, the HS-DSCH PDU that said status report indicates said UE to lose.
Description of drawings
Fig. 1 for according to behind the HS-DSCH of the being used for cell change of the present invention to the flow chart of the effective procedure that efficient recovery is arranged of Node B buffered data;
Fig. 2 is the flow chart of replacement method, wherein this RNC wait state PDU before the transmission of beginning new data in Target cell.
Embodiment
Preferred implementation of the present invention will be with reference to description of drawings, wherein the assembly of same number TYP in institute's drawings attached.
According to the present invention; RNC obtains the state of PDU and the stand-by period of the data recovering to cushion among the Node B of this source in order to shorten; So behind this service HS-DSCH cell change, this UE just automatically with the state of PDU and then the notice of the indicated HS-DSCH cell change of RRC process send to said RNC at the back.Can the generation of status PDU be applied to each with AM RLC example that this HS-DSCH transfer channel is associated on.
With reference to the flow chart of figure 1, show a kind of according to the method 10 that the buffered data of efficient recovery Node B is arranged of the present invention.This RNC identifies the needs (step 12) for service HS-DSCH cell change.Then, notify this Node B should serve HS-DSCH cell change (step 14).As indicated via the RRC request message, notice UE service HS-DSCH cell change (step 16).Note that also maybe be in first invocation step 16 before the step 14, and does not have any disadvantageous consequence.
In case UE has received the RRC request message in step 18; Time of delay when shortening the data that cushion among the Node B of recovery source, and then this UE generates the status report (step 20) of an indication RLC PDU state after the notice of the indicated HS-DSCH cell change of RRC process as early as possible automatically.This UE does not wait for the triggering (for example this RNC request produces a status PDU or this UE detects the data of not transmitting in order) in order to generate status PDU in arbitrary prior art.
In UE, have that many UE can implement after service HS-DSCH cell change with the different alternative method of the generation of triggering PDU status report.Yet several instances are proposed here.Preferably, first selects, in case when the buffering area of its rearrangement of this MAC-hs notice RLC empties.Second is chosen as the 3rd layer of (L3) RRC process of this service of RRC notice RLC indication HS-DSCH cell change.The 3rd, physical layer can notify RLC to receive the HS-DSCH control channel in this Target cell, in case perhaps this physical layer can notify this RLC HS-DSCH to control transitions to this Target cell.Those skilled in the art must can be appreciated that the method that also has other can treat to be sent to from this UE the RLC PDU status message of RNC in order to triggering.Because this process causes producing in the short period of time this PDU state and this PDU state is sent to RNC (step 22), thereby causes more effectively recovering the buffered data of source NodeB.
According to step 22, there are some kinds of replacement methods can supply this UE that the status report of PDU is sent to RNC.These methods of sending these status PDU are the instance how the PDU state transmits with signal to RNC from UE, and are not main affairs of the present invention, and it relates to based on new criterion and generates status PDU.Preferably, UE generates the RLC status report for the AM RLC example that each is mapped to the HS-DSCH transfer channel.
In second kind of replacement method, in case obtain status report, UE just sends the PDU status report to RNC via the first existing uplink message from this UE.For the Serving cell in the Node B changes (and supposing that this HS-DSCH transfer channel and radio bearer parameter do not change), this message is " physical channel reconfigures completion " on DCCH.If HS-DSCH transfer channel and radio bearer parameter change and/or change for the Serving cell between the Node B, this message is " transfer channel reconfigures completion " on DCCH.The PDU state can identify in arbitrary RRC signaling message.Then, the state of the said PDU of RNC RRC entity notice RLC is to restart to the transmission of target Node B.
In the third replacement method, UE sends the status report of the new L3 signaling message on this relevant DCCH to this RNC from this UE.This new information sends the rrc layer of this RNC to from radio resource control (RRC) layer of this UE.Then, this RNC notifies the state of the said PDU of this rlc layer, to restart to the transmission of target Node B.In this case, the PDU status message shown in Fig. 1 can comprise two separate message: " RRC completion " and " RLC state ".
Should be noted that the specific format of the status report of this PDU can change.For example, the form of the status report of said PDU can comprise: the 1) sequence number of last PDU that successfully transmits (SN) in the sequence; 2) the highest SN of the PDU that successfully receives; 3) SN of the PDU (PDU that promptly loses) that does not have successfully to receive, paramount the highest SN to the PDU that successfully receives; 4) or the tabulation of the SN of the PDU that successfully receives.
In case when RNC receives the message of carrying the PDU state, then handle this PDU status message (step 24), with the PDU that confirms to be lost by this RNC RLC.This RNC recognizes the data of losing because of this cell change now, and can these data of losing be transferred to this UE (step 26) again.Should be noted that said message can have many kind replacements, and is not limited to only carry the PDU status report.
Be to be further noted that in embodiments of the present invention RNC can continue to transmit the data that will be transferred to this UE in the Target cell between step 16 and 24.If successfully transmit because fail during buffered data on the active Node B order of data will disorderly fall, therefore can force this these data of UE RLC buffering, make data can be delivered to high level in order.This requires UE to have the memory of the chaotic PDU of the said order of enough storages.After the data of having lost any order, transmission is restricted to the memory capabilities of this UE, till the data of successfully having transmitted the order of losing.
Refer now to the flow chart of Fig. 2, show a kind of according to the present invention the method 40 of the buffered data that efficient recovery Node B is arranged of another execution mode.This method 40 is similar to method shown in Figure 1 10, and identical with the step of the step of Fig. 1 same tag and Fig. 1 among Fig. 2.Yet according to the embodiment of the present invention, this method 40 comprises a new step 17, and wherein this RNC suspends all down link HS-DSCH transmission to UE, up to handled said PDU status message in step 24 till.This execution mode has minimized the delay of transmission again of the buffered data of source Node B, and has limited the data volume that on UE, must cushion.
With regard to this minimize latency, Node B does not also know the transmission sequence number of RLC, and the transmitting and scheduling in the Node B is based on first in first out (FIFO).Therefore, if data are to be transmitted before this PDU state is processed by the RNC in the Target cell, then these data can at first be sent.Such data queue among the Node B can cause the further delay of transmission again of possible source Node B buffered data.
The present invention is applicable to the HS-DSCH cell change in the cell change in cell change between the Node B and the Node B.Because in the situation in Node B, come because indoor design problem and can not be for Node B, so RNC can indicate the needs for the generation of the PDU state of two kinds of situation the HS-DSCH data of buffering target goal sub-district again.This UE also possibly can't pick out cell change between the Node B still be the cell change in the Node B, this will cause between the Node B with Node B in the generation of PDU state of two kinds of situation.For switching between the Node B of Target cell buffered data or for the situation of the cell change in the Node B, transmit status PDU is useful by this way.
Though the present invention has been detailed, will be appreciated that the present invention does not limit to be formed on this, and can do various changes to it to the present invention in defined spirit and the scope not breaking away from accompanying claims.
Claims (3)
1. one kind is used to promote the method by the high-speed downlink shared channel HS-DSCH cell change of user equipment (UE) execution; Said UE comprises high speed media access control MAC-hs device and the rearrangement buffering area related with MAC-hs, and this method comprises that utilizing UE to receive carries the wireless signal that the radio resource related with the HS-DSCH cell change controlled the RRC request message; It is characterized in that this method comprises following subsequent step:
After receiving wireless signal, empty said rearrangement buffering area;
Utilize MAC-hs device notice rearrangement buffering area to be cleared; And
Generate status report in response to emptying said rearrangement buffering area; Each status report is separately corresponding to the answer-mode radio link control AM RLC example that is mapped to HS-DSCH, the HS-DSCH Packet Data Unit PDU that said status report indication UE loses.
2. method according to claim 1, wherein UE generates status report automatically.
3. method according to claim 1 and 2, wherein UE comprises radio link control RLC device, this RLC device is implemented the generation of status report.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37074002P | 2002-04-05 | 2002-04-05 | |
| US60/370,740 | 2002-04-05 | ||
| US10/334,489 | 2002-12-30 | ||
| US10/334,489 US6717927B2 (en) | 2002-04-05 | 2002-12-30 | System for efficient recovery of node B buffered data following serving high speed downlink shared channel cell change |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038077310A Division CN100559902C (en) | 2002-04-05 | 2003-04-02 | The subscriber equipment and the method that help high speed-downlink shared channel cell change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101137241A CN101137241A (en) | 2008-03-05 |
| CN101137241B true CN101137241B (en) | 2012-04-25 |
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| CN2009101746259A Expired - Lifetime CN101662803B (en) | 2002-04-05 | 2003-04-02 | System and method which facilitate high speed-downlink shared channel cell change |
| CN2007101538149A Expired - Lifetime CN101137241B (en) | 2002-04-05 | 2003-04-02 | User equipment and method to improve high speed downlink shared control channel cell change |
| CN2007101538134A Expired - Lifetime CN101137240B (en) | 2002-04-05 | 2003-04-02 | User equipment and method to improve high speed downlink shared control channel cell change |
| CN200910174624.4A Expired - Lifetime CN101662801B (en) | 2002-04-05 | 2003-04-02 | User equipment and method which facilitate high speed-downlink shared channel cell change |
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| CN2007101538134A Expired - Lifetime CN101137240B (en) | 2002-04-05 | 2003-04-02 | User equipment and method to improve high speed downlink shared control channel cell change |
| CN200910174624.4A Expired - Lifetime CN101662801B (en) | 2002-04-05 | 2003-04-02 | User equipment and method which facilitate high speed-downlink shared channel cell change |
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| EP2262303B1 (en) * | 2008-03-31 | 2018-06-13 | NEC Corporation | Concealment processing device, concealment processing method, and concealment processing program |
| CN105356926A (en) | 2009-06-17 | 2016-02-24 | 交互数字专利控股公司 | Relay node and method for performing handover |
| US8867494B2 (en) * | 2009-11-09 | 2014-10-21 | Qualcomm Incorporated | System and method for single frequency dual cell high speed downlink packet access |
| CN104811997B (en) * | 2014-01-26 | 2019-07-05 | 中兴通讯股份有限公司 | Configuration status management method, radio network controller and the base station of user equipment |
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| US5751719A (en) * | 1995-11-30 | 1998-05-12 | Lucent Technologies Inc. | Method and system for data transfer in the presence of disconnects |
| US5987326A (en) * | 1997-02-11 | 1999-11-16 | Qualcomm Incorporated | Transmit power reduction for a high speed CDMA link in soft handoff |
| US6230013B1 (en) * | 1997-11-26 | 2001-05-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Diversity handling moveover for CDMA mobile telecommunications |
| US6445917B1 (en) * | 1999-05-19 | 2002-09-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile station measurements with event-based reporting |
| US6301479B1 (en) * | 1999-07-08 | 2001-10-09 | Telefonaktiebolaget Lm Ericsson | Technique for providing a secure link in a mobile communication system |
| SE516727C2 (en) * | 2000-04-11 | 2002-02-19 | Ericsson Telefon Ab L M | Method and apparatus for reducing the amount of hand-related signal traffic in a telecommunications system |
| FR2809577B1 (en) * | 2000-05-25 | 2002-10-18 | Mitsubishi Electric Inf Tech | DATA TRANSMISSION METHOD COMBATING THE DEGRADATION OF QUALITY OF SERVICE |
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2003
- 2003-04-02 CN CN2009101746259A patent/CN101662803B/en not_active Expired - Lifetime
- 2003-04-02 CN CN2007101538149A patent/CN101137241B/en not_active Expired - Lifetime
- 2003-04-02 CN CN2007101538134A patent/CN101137240B/en not_active Expired - Lifetime
- 2003-04-02 CN CN200910174624.4A patent/CN101662801B/en not_active Expired - Lifetime
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2015
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101662803A (en) | 2010-03-03 |
| NO339864B1 (en) | 2017-02-13 |
| NO20151369L (en) | 2004-10-04 |
| CN101662801B (en) | 2014-02-26 |
| CN101137240B (en) | 2011-01-26 |
| CN101137240A (en) | 2008-03-05 |
| CN101137241A (en) | 2008-03-05 |
| CN101662801A (en) | 2010-03-03 |
| CN101662803B (en) | 2013-01-02 |
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