CN102474798B - Method and device for processing handover channel state - Google Patents
Method and device for processing handover channel state Download PDFInfo
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- CN102474798B CN102474798B CN201080025140.4A CN201080025140A CN102474798B CN 102474798 B CN102474798 B CN 102474798B CN 201080025140 A CN201080025140 A CN 201080025140A CN 102474798 B CN102474798 B CN 102474798B
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- user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
Abstract
The present invention discloses a method and device for processing handover channel state, which are used for solving the problem that, after logical cells are utilized, handover collisions are easily caused when multiple user terminals are handed over to a logic cell in parallel. Add a state 4 in the state machine of the handover channel; when the handover channel is in the state 1, if there is handover access information transmitted from a user terminal to the base station, then the handover channel turns to the state 2; if handover access information transmitted by other user terminals is received at this time, then the handover channel turns to the state 4; in the state 4, the base station prevents the user terminals which will cause collisions from accessing to the handover channel. The present invention can effectively solve the problems of uplink interference, downlink crosstalk, and hang of the user terminals, which are caused by handover collisions of the Global System for Mobile Communication (GSM) micro micro base station system, thus greatly improves the success rate of handover, makes the GSM micro micro base station system to be utilized more widely, and provides better service for the users.
Description
Technical field
The present invention relates to GSM (global system for mobile communication) moving communicating field, relate in particular to a kind of switching channels condition processing method and device.
Background technology
Along with GSM mobile communications network is more and more ripe, development also becomes slowly, and new technology new thinking is fewer and feweri.Answer the demand in market this time, produced the femto base station that is covered as 100 meters.For this femto base station of extensive use, the technology using at present has two.One is logic district technology, and one is parallel handoff technique.
Logic district technology, briefly regards one " community " as the femto base station in a region with identical frequency, same color exactly, and this " community " is exactly logic district.This technology has solved when macro station is used slight station around on a large scale, this difficulty of neighbor cell configuration.Because a macro station can not exceed at most 64 in the adjacent area of configuration around, if use the technology of logic district just can well address this problem, the number at the slight station that can comprise in a logic district can be 1023.
Original so global unique cell identification CGI (Cell Global Identity) has just had following derivative product:
Logic district mark (CGI-Frequency, CGI-F) a: logic district is the set of some femto base stations that have identical frequency, colour coding.
The cellular global identity (CGI-Air, CGI-A) of single femto base station.
Determine the parameters such as cellular global identity CGI-A, frequency, colour coding for each femto base station, and the logic district CGI-F that specifies each CGI-A to belong to.
When macro station arranges adjacent area, only need to arrange as a logic district for this group femto base station with identical frequency same color like this.And the adjacent area of femto base station can be another femto base station, or a logic district, or a macro base station.
After having had logic district, simultaneously in order to make grand micro-switching become more excellent, use the method for parallel switching.So-called parallel switching refers on microcosmic, allows plural user terminal to be cut into logic district simultaneously, describedly refers to that at one time in section, system is processed the access procedure of plural user terminal simultaneously simultaneously.So just requiring the each femto base station in logic district, in carrying out the user terminal allocated channel of grand micro-switching, must be consistent.This consistent channel is exactly the switching dedicated channel using now.Be characterized in, the switching channels under same logic district externally performance is consistent, so just can naturally realize parallel switching.
After having used logic district and parallel switching, the flow process of switching between existing grand micro-base station as shown in Figure 1:
Step 101: user terminal is at Serving cell timing reporting measurement reports;
Step 102: user terminal is received the switching command of former network side, is required to be cut into the switching dedicated channel of this logic district;
Step 103: the user terminal of receiving switching command sends switching access message;
Step 104: base station sends and switches access response message to user terminal;
Step 105: receive that the base station of switching access message sends switching detection message to BSC (basic station controller, base station controller);
Step 106: the multiframe that user terminal sends in switching dedicated channel is set up message;
Step 107: base station sends acknowledge message to user terminal, and send and set up instruction to BSC;
Step 108: user terminal sends handoff completion message to BSC;
Step 109:BSC starts switching within cell flow process, and user terminal is cut into non-switching dedicated channel;
Step 110:BSC issues and has switched notice, and once grand micro-switching flow finishes, and discharges switching channels to upstate.
From flow process above, can find out, from the angle of user terminal, need to complete two main stages, as shown in Figure 3, first mutual stage is that user terminal sends switching access message, and waits for base station feedback switching access response message.Second mutual stage be user terminal receiving after the switching access response message of base station feedback, send multiframe to base station and set up message, and wait for that base station feedback multiframe sets up response message.
In first mutual stage, user terminal sends and switches after access message, if do not receive the switching access response message of base station in official hour, user terminal is thought handoff failure, can attempt to switch go back to former base station.
In second mutual stage, user terminal sends multiframe and sets up after message, if do not receive in official hour, the multiframe of base station sets up response message, and user terminal is thought handoff failure, can attempt equally to switch go back to former base station.
In above-mentioned first mutual stage, can there is such problem: if there are now multiple user terminals to need to cut toward a logic district simultaneously, i.e. parallel switching, just likely produces switching conflict.Switch conflict and here refer to, multiple user terminals do and switch toward a femto base station simultaneously.Furtherly, be that multiple user terminals above access toward the same channel (switching channels) of a femto base station simultaneously.Will inevitably produce so up interference, descending cross-talk, even user terminal is hung dead phenomenon.Switch in the situation of conflict generation, the principle of processing is that the switching of all conflict user terminals is all can not be successful.If femto base station has detected that switching conflict produces, three layers of base station will be finished this switching flow, no longer proceed toward next step.After but two layers of multiframe of receiving that conflict user terminal accesses of base station are set up message, will respond an acknowledge message, like this, user terminal just thinks that oneself has successfully been linked into femto base station, but three layers of femto base station have been finished this switching flow simultaneously, and on this channel, network side there will be no any message to user terminal like this.So just cause user terminal to hang extremely on switching channels.
Meanwhile, if logic district, one of the adjacent area of picocell, while switching in picocell Zhong Wang logic district so, switching flow is identical with grand micro-switching.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of switching channels condition processing method and device, uses behind logic district for solving, and easily produces the problem of switching conflict while being switched to a logic district multiple user terminals are parallel.
For achieving the above object, technical scheme of the present invention is achieved in that
First define 4 states on switching channels:
State 1: for characterizing the idle condition of switching channels, i.e. upstate;
State 2: for characterizing the collision detection state of switching channels, detect on switching channels whether conflict has occurred;
State 3: for characterizing the busy condition of switching channels, under busy condition, switching channels is waited for and being discharged, and does not receive other user's access message;
State 4: for characterizing the conflict situation of switching channels, stop conflict user access under conflict situation, this state is the newly-increased state of the present invention.
State definition based on above-mentioned switching channels, the present invention proposes a kind of switching channels condition processing method, comprises step:
Increase state 4 in the state machine of switching channels, when switching channels is during in state 1, switches access message if there is user terminal to send to base station, and switching channels gets the hang of 2; If now receive the switching access message that other user terminal sends, switching channels gets the hang of 4, and state 4 times, base station stops the user terminal that produces conflict to be linked on switching channels.
Further, state 4 times, base station sends to first multiframe that user terminal that switches access message do not respond its transmission and sets up message, thereby stops this user terminal to be linked on switching channels; To after send the user terminal that switches access message, stop and send the user terminal that switches access message after described and be linked on switching channels thereby base station does not respond the switching access message of its transmission.
Further, state 4 times, the multiframe that base station does not respond its transmission to the user terminal of all generation conflicts is set up message, thereby stops it to be linked on switching channels.
Further, get the hang of after 4 at switching channels, start a conflict timer, when after described conflict timer expiry, switching channels gets the hang of 1.The time that the timing length of described conflict timer switches go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.
Based on said method, the present invention proposes the system that switch corresponding logic district, and concrete scheme is as follows:
A kind of switching channels state processing device, increase state 4 in the state machine of switching channels, this device comprises:
Collision detection module, for detection of whether have multiple user terminals to prepare to access switching channels simultaneously, when switching channels after the switching access message that receives first user terminal transmission gets the hang of 2, if switching channels is in the time that state receives again the switching access message of other user terminal transmission for 2 times, switching channels gets the hang of 4, and notice conflict processing module is processed;
Conflict processing module, for stoping for 4 times the user terminal of conflict to be linked into switching channels at state.
Further, state 4 times, conflict processing module sends to first multiframe that user terminal that switches access message do not respond its transmission and sets up message, thereby stops this user terminal to be linked on switching channels; Switch to sending afterwards the user terminal that accesses message, the switching that conflict processing module does not respond its transmission accesses message, thereby stops the described user terminal that sends afterwards switching access message to be linked on switching channels.
Further, state 4 times, the multiframe that conflict processing module does not respond its transmission to the user terminal of all generation conflicts is set up message, thereby stops it to be linked on switching channels.
Further, get the hang of after 4 at switching channels, conflict processing module starts a conflict timer, and when after described conflict timer expiry, conflict processing module makes switching channels get the hang of 1.The time that the timing length of described conflict timer switches go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.
Adopt technical scheme of the present invention, can effectively solve GSM femto base station and hang dead problem owing to switching the uplink interference, descending cross-talk and user terminal that conflict causes, and then the success rate that raising is switched greatly, to make GSM femto base station system be used more widely, for user provides better business.
Brief description of the drawings
Fig. 1 is grand micro-switching flow figure;
Fig. 2 is switching channels state transition diagram of the present invention;
Fig. 3 is two stage access schematic diagrames of handoff procedure;
Fig. 4 is the process chart of the embodiment of the present invention 1;
Fig. 5 is the process chart of the embodiment of the present invention 2.
Embodiment
Core concept of the present invention is: in the state machine of switching channels, increase a state, it is state 4, state 4 times, base station can stop the user terminal that produces conflict to be linked on switching channels, thereby prevents that cross-talk, interference and user terminal from hanging the generation of the phenomenon of waiting indefinitely.
Fig. 2 is the state transition graph of the state machine of the switching channels that proposes of the present invention, and in prior art, the state machine of switching channels has three states, is respectively state 1, state 2 and state 3;
Switching channels be state 1 after activating, and state 1 time, switches and accesses message if receive, and proceeds to state 2; Will carry out collision detection 2 times at state, state 2 times, receive to switch access message and return to user terminal when base station and switch after access response message, start a wait multiframe and set up the waiting timer (T3105) of message, if this timer is set up message through Ny1 the overtime multiframe of all not receiving that user terminal sends, switching channels is got back to state 1, and the timing length of timer T3105 and expired times Ny1 are by default.
Switching channels is receiving that multiframe sets up after message, the multiframe of base station in response user terminal is set up message, after receiving response, user terminal could formally be linked into switching channels, base station receive user terminal set up Indication message after transfer switching channels to state 3, state 3 times, the switching of base station waits BSC completes notice, switched if receive notice or etc. to be switched complete to notify after overtime proceed to state 1; State 3 times, if receive the switching access message of other user terminal, do not process.
The present invention is increase state 4 in the state machine of switching channels, under collision detection state, if BTS receives the switching access of another one user terminal, conflict relatively can be detected by what switch reference number, switching channels gets the hang of 4, and report a connection failure message to BSC, former because switch conflict; The present invention state 4 times by stoping the response of step of first stage or second stage, thereby stop user terminal to be linked on switching channels, prevent the wait indefinitely object of generation of phenomenon of cross-talk, interference and user terminal extension to reach.The present invention is arranged with a conflict timer at state 4, after timer expiry, enter into state 1, the time that conflict timer can switch go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.Thereby ensure that the state of switching channels can return to idle condition after conflict disappears.
For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Embodiment 1:
Fig. 4 is the schematic diagram of the present invention's one preferred solution, and idiographic flow is as follows:
Step 401, switch after access message when first user terminal has sent to base station, switching channels gets the hang of 2, if now receive again the switching access message that other user terminal sends, switching channels now gets the hang of 4;
In the time that base station has detected switching conflict, base station is set up (Set Asynchronous Balanced Mode, SABM) message for the multiframe of the user terminal of access at first and is not responded (be under normal circumstances base station set up message for the multiframe of user terminal must respond).So just can stop first described user terminal to complete second mutual stage, and then first user terminal reaching described in stoping is linked into the object on switching channels.
Step 402, at switching channels during in state 4, the switching access message that base station sends follow-up other user terminal does not respond, user terminal accesses response message in the switching of waiting for base station and can automatically switch back in former base station after overtime like this.
Embodiment 2:
Fig. 5 is the schematic diagram of the second solution, and idiographic flow is as follows:
Step 50l, after base station detects to switch conflict,, when switching channels gets the hang of after 4, do not add differentiation for all conflict user terminals, all normally the carrying out alternately of their first mutual stage.
Step 502, when conflict user terminal is while proceeding to second mutual stage, multiframe to all conflict user terminal to send up is set up message, base station does not respond, and user terminal is waiting for that base station feedback multiframe sets up response message and can automatically switch back in former base station after overtime like this.
Based on above-mentioned solution, the present invention proposes a kind of switching channels state processing device, and this device is positioned at base station, and this device comprises: collision detection module and conflict processing module.
Whether collision detection module is for detection of have multiple user terminals to prepare to access switching channels simultaneously, after receiving first user terminal to access message to the switching of base station transmission, switching channels gets the hang of 2, if switching channels is in the time that state receives again the switching access message of other user terminal transmission for 2 times, switching channels gets the hang of 4, and notice conflict processing module is processed; Conflict processing module is for stoping for 4 times the user terminal of conflict to be linked into switching channels at state.
Based on aforementioned the first scheme, state 4 times, conflict processing module sends to first multiframe that user terminal that switches access message do not respond its transmission and sets up message, thereby stops this user terminal to be linked on switching channels; Switch to sending afterwards the user terminal that accesses message, the switching that conflict processing module does not respond its transmission accesses message, thereby stops the described user terminal that sends afterwards switching access message to be linked on switching channels.
Based on aforementioned first scheme, state 4 times, the multiframe that conflict processing module does not respond its transmission to the user terminal of all generation conflicts is set up message, thereby stops it to be linked on switching channels.
Get the hang of after 4 at switching channels, conflict processing module starts a conflict timer, and when after described conflict timer expiry, conflict processing module makes switching channels get the hang of 1.The time that the timing length of described conflict timer switches go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.
The above, be only preferred embodiment of the present invention, is not intended to limit protection range of the present invention.
Claims (6)
1. a switching channels condition processing method, is characterized in that, comprising:
Increase state 4 in the state machine of switching channels, when switching channels is during in state 1, switches access message if there is user terminal to send to base station, and switching channels gets the hang of 2; If state receives the switching access message that other user terminal sends for 2 times, switching channels gets the hang of 4, and state 4 times, base station stops the user terminal that produces conflict to be linked on switching channels;
Wherein, state 1: for characterizing the idle condition of switching channels, i.e. upstate;
State 2: for characterizing the collision detection state of switching channels, detect on switching channels whether conflict has occurred;
State 4: for characterizing the conflict situation of switching channels, stop conflict user access under conflict situation;
Described state 4 times, base station sends to first multiframe that user terminal that switches access message do not respond its transmission and sets up message, thereby stops this user terminal to be linked on switching channels; Access the user terminal of message to sending switching afterwards, the switching that base station does not respond its transmission accesses message, is linked on switching channels thereby the described transmission afterwards of prevention switching accesses the user terminal of message; Or,
State 4 times, the multiframe that base station does not respond its transmission to the user terminal of all generation conflicts is set up message, thereby stops it to be linked on switching channels.
2. method according to claim 1, is characterized in that, gets the hang of after 4 at switching channels, starts a conflict timer, and when after described conflict timer expiry, switching channels gets the hang of 1.
3. method according to claim 2, it is characterized in that, the time that the timing length of described conflict timer switches go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.
4. a switching channels state processing device, is characterized in that, increase state 4 in the state machine of switching channels, and this device comprises:
Collision detection module, for detection of whether have multiple user terminals to prepare to access switching channels simultaneously, when switching channels after the switching access message that receives first user terminal transmission gets the hang of 2, if switching channels is in the time that state receives again the switching access message of other user terminal transmission for 2 times, switching channels gets the hang of 4, and notice conflict processing module is processed;
Conflict processing module, for stoping for 4 times the user terminal of conflict to be linked into switching channels at state;
Wherein, state 1: for characterizing the idle condition of switching channels, i.e. upstate;
State 2: for characterizing the collision detection state of switching channels, detect on switching channels whether conflict has occurred;
State 4: for characterizing the conflict situation of switching channels, stop conflict user access under conflict situation;
Described state 4 times, conflict processing module sends to first multiframe that user terminal that switches access message do not respond its transmission and sets up message, thereby stops this user terminal to be linked on switching channels; Switch to sending afterwards the user terminal that accesses message, the switching that conflict processing module does not respond its transmission accesses message, thereby stops the described user terminal that sends afterwards switching access message to be linked on switching channels; Or,
State 4 times, the multiframe that conflict processing module does not respond its transmission to the user terminal of all generation conflicts is set up message, thereby stops it to be linked on switching channels.
5. device according to claim 4, is characterized in that, gets the hang of after 4 at switching channels, and conflict processing module starts a conflict timer, and when after described conflict timer expiry, conflict processing module makes switching channels get the hang of 1.
6. device according to claim 5, it is characterized in that, the time that the timing length of described conflict timer switches go back to former base station according to the user terminal that produces conflict add up settings, and the time that user terminal switches go back to former base station the overtime duration of to be switched access response message and the user terminal transmission multiframe such as is accessed after message by user terminal transmission switching and sets up and wait for that multiframe sets up the overtime duration of response message and determine after message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201080025140.4A CN102474798B (en) | 2009-07-17 | 2010-06-30 | Method and device for processing handover channel state |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101579453A CN101959264A (en) | 2009-07-17 | 2009-07-17 | Logic cell switching method and system |
| CN200910157945.3 | 2009-07-17 | ||
| PCT/CN2010/074793 WO2011006424A1 (en) | 2009-07-17 | 2010-06-30 | Method and device for processing handover channel state |
| CN201080025140.4A CN102474798B (en) | 2009-07-17 | 2010-06-30 | Method and device for processing handover channel state |
Publications (2)
| Publication Number | Publication Date |
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| CN102474798A CN102474798A (en) | 2012-05-23 |
| CN102474798B true CN102474798B (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101579453A Withdrawn CN101959264A (en) | 2009-07-17 | 2009-07-17 | Logic cell switching method and system |
| CN201080025140.4A Active CN102474798B (en) | 2009-07-17 | 2010-06-30 | Method and device for processing handover channel state |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101579453A Withdrawn CN101959264A (en) | 2009-07-17 | 2009-07-17 | Logic cell switching method and system |
Country Status (4)
| Country | Link |
|---|---|
| CN (2) | CN101959264A (en) |
| HK (1) | HK1164028A1 (en) |
| RU (1) | RU2504112C2 (en) |
| WO (1) | WO2011006424A1 (en) |
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| CN110839258B (en) * | 2018-08-17 | 2021-09-21 | 展讯通信（上海）有限公司 | Condition switching method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052205A (en) * | 2006-04-04 | 2007-10-10 | 中兴通讯股份有限公司 | User's terminal switch control method in mobile communication system |
| WO2009022860A1 (en) * | 2007-08-13 | 2009-02-19 | Lg Electronics Inc. | Method for performing handover in wireless communication system |
| CN101379855A (en) * | 2007-04-28 | 2009-03-04 | 华为技术有限公司 | Method and system for switching from a source district to a target district in honeycomb communication system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2595326A1 (en) * | 2003-01-21 | 2013-05-22 | Qualcomm Incorporated | Packet duplication |
| US20080232323A1 (en) * | 2007-03-22 | 2008-09-25 | Samsung Electronics Co., Ltd. | Method and apparatus for handover in a wireless communication system, and system thereof |
| ES2435195T5 (en) * | 2007-05-24 | 2017-07-06 | Huawei Technologies Co., Ltd. | Mobile communication system, base station device and mobile station device for random access without the need for operational conflict resolution |
-
2009
- 2009-07-17 CN CN2009101579453A patent/CN101959264A/en not_active Withdrawn
-
2010
- 2010-06-30 WO PCT/CN2010/074793 patent/WO2011006424A1/en active Application Filing
- 2010-06-30 CN CN201080025140.4A patent/CN102474798B/en active Active
- 2010-06-30 RU RU2012101257/08A patent/RU2504112C2/en not_active IP Right Cessation
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- 2012-05-14 HK HK12104693.8A patent/HK1164028A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052205A (en) * | 2006-04-04 | 2007-10-10 | 中兴通讯股份有限公司 | User's terminal switch control method in mobile communication system |
| CN101379855A (en) * | 2007-04-28 | 2009-03-04 | 华为技术有限公司 | Method and system for switching from a source district to a target district in honeycomb communication system |
| WO2009022860A1 (en) * | 2007-08-13 | 2009-02-19 | Lg Electronics Inc. | Method for performing handover in wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2504112C2 (en) | 2014-01-10 |
| HK1164028A1 (en) | 2012-09-14 |
| CN102474798A (en) | 2012-05-23 |
| CN101959264A (en) | 2011-01-26 |
| WO2011006424A1 (en) | 2011-01-20 |
| RU2012101257A (en) | 2013-08-27 |
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