CN103139855B - A kind of method, equipment and system being switched to target BS by source base station - Google Patents
A kind of method, equipment and system being switched to target BS by source base station Download PDFInfo
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- CN103139855B CN103139855B CN201110374231.5A CN201110374231A CN103139855B CN 103139855 B CN103139855 B CN 103139855B CN 201110374231 A CN201110374231 A CN 201110374231A CN 103139855 B CN103139855 B CN 103139855B
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Abstract
The object of this invention is to provide a kind of method, equipment and system for user's set to be switched to target BS by source base station.A kind of base station switching device shifter for user's set to be switched to target BS by source base station is provided according to the solution of the present invention, described base station switching device shifter is contained in source base station, it comprises: first receiving device, for receiving the measurement report information from described user's set; Distance determining device, for when judging to start handover operation according to measurement report information, determines the range information of described user's set and described target BS; First dispensing device, for sending handover request information to target BS; Second receiving system, for receiving the switching confirmation from target BS; Second dispensing device, for being sent to described user's set by switching information of base station.The invention has the advantages that the stand-by period decreased needed for Stochastic accessing, improve switching efficiency, and decrease user's drop rate.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method, equipment and system for user's set to be switched to target BS by source base station.
Background technology
Current when switching to universal terrestrial radio access network, random access procedure must be adopted, but no matter be contention access or uncontested access, all necessary following two processes, that is: 1) by the Random Access Channel (RACH in up link, RandomAccessChannel) Stochastic accessing preamble code is transmitted, that is the process of transmission Message1; And 2) transmit Stochastic accessing return information (RandomAccessResponse) by downlink sharied signal channel (DLSCH, DownLinkSharingChannel), that is the process of transmission Message2.But these two processes often need the longer stand-by period, when user's set switches to target BS by source base station, can be longer and cause user's set cannot be connected to target BS in time after disconnecting with source base station due to waiting time, cause user's set to break.
Summary of the invention
The object of this invention is to provide a kind of method, equipment and system for user's set to be switched to target BS by source base station.
According to an aspect of the present invention, provide a kind of base station switching device shifter for user's set to be switched to target BS by source base station, described in be contained in the source base station corresponding with described user's set, wherein, described first base station switching device shifter comprises:
First receiving device, for receiving the measurement report information from described user's set;
Distance determining device, for when judging to start handover operation according to measurement report information, determines the range information of described user's set and described target BS;
First dispensing device, for sending handover request information to target BS; Wherein, described handover request packets of information is containing described range information;
Second receiving system, for receiving the switching confirmation from target BS, wherein, comprises the Timing Advance information of described target BS relative to described user's set in described switching confirmation;
Second dispensing device, for switching information of base station is sent to described user's set, wherein said switching information of base station comprises RRC reconfiguration information, Timing Advance information and does not perform the information of Stochastic accessing.
According to an aspect of the present invention, also provide a kind of user's switching device shifter for user's set to be switched to target BS by source base station, described user's switching device shifter is contained in described user's set, and wherein, described user's switching device shifter comprises:
3rd dispensing device, for sending the measurement report information to described target BS to the source base station corresponding with described user's set;
3rd receiving system, for receiving the switching information of base station from described source base station, wherein, described switching information of base station comprises RRC reconfiguration information, Timing Advance information and does not perform the information of Stochastic accessing;
Switch synchronizer, for being separated with source base station and carrying out synchronous with target BS;
Connect dispensing device, for comprising the message of RRC reconfiguration information to complete connection to described target BS transmission.
According to an aspect of the present invention, also provide a kind of jockey for user's set to be switched to target BS by source base station, described jockey is contained in described target BS, and wherein, described jockey comprises:
4th receiving system, for receiving the handover request information from described source base station; Wherein, described handover request packets of information contains the range information of described user's set and described target BS;
Calculation element, obtains Timing Advance information for calculating according to described range information;
4th dispensing device, for sending the switching confirmation comprising the information of described Timing Advance to described source base station;
Timing determining device, for determining the time of implementation of compulsory execution uplink scheduling and carrying out timing based on described Timing Advance information;
Connect finishing device, for when arriving the time of implementation, compulsory execution uplink scheduling is until the RRC reconfiguration information of successfully decoding from user's set connects to complete.
According to an aspect of the present invention, a kind of method for user's set to be switched to target BS by source base station is also provided, wherein, said method comprising the steps of:
A source base station receives the measurement report information from described user's set;
B source base station, when judging to start handover operation according to measurement report information, determines the range information of described user's set and described target BS;
C source base station sends handover request information to target BS; Wherein, described handover request packets of information is containing described range information;
D source base station receives the switching confirmation from target BS, wherein, comprises the Timing Advance information of described target BS relative to described user's set in described switching confirmation;
Switching information of base station is sent to described user's set by e source base station, and wherein said switching information of base station comprises RRC reconfiguration information, Timing Advance information and do not perform the information of Stochastic accessing.
According to an aspect of the present invention, provide a kind of switched system for user's set to be switched to target BS by source base station, described switched system comprises described base station switching device shifter, described user's switching device shifter and described jockey.
Compared with prior art, the present invention has the following advantages: in the present invention, user's set can send directly to target BS the Message3 comprising RRC reconfiguration information, and complete Stochastic accessing with target BS by performing the step corresponding with Message1 and Message2 without the need to elder generation, thus avoid the stand-by period of causing owing to performing the step corresponding with Message1 and Message2, improve efficiency during cell merge.Wherein, the average turn-on time needed for common scheme is 40 to 60TTIs, and on average can be shortened about 14TTIs turn-on time according to the solution of the present invention, can shorten the turn-on time of about 23%-35%, thus larger minimizing user drop rate.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the structural representation of the switched system for user's set to be switched to target BS by source base station of one aspect of the present invention;
Fig. 2 is the method flow diagram for user's set to be switched to target BS by source base station of one aspect of the present invention.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 illustrates the structural representation of the switched system for user's set to be switched to target BS by source base station of one aspect of the present invention.The jockey 3 that switched system according to the present invention comprises the base station switching device shifter 1 be contained in source base station, is contained in the user's switching device shifter 2 in user's set and is contained in target BS.
Wherein, described user's set comprises and wirelessly directly or indirectly and the electronic installation of base station communication, can include but not limited to mobile phone, PDA etc.Described base station includes but not limited to BS, e-NodeB, Home eNodeB, macro base station etc.It should be noted that, it should be appreciated by those skilled in the art that described switched system, base station and user's set are not limited with described.
Described base station switching device shifter 1 comprises first receiving device 11, distance determining device 12, first dispensing device 13, second receiving system 14, second dispensing device 15; Described user's switching device shifter 2 comprises the 3rd dispensing device 21, the 3rd receiving system 22, switches synchronizer 23 and connect dispensing device 24; Described jockey 3 comprises the 4th receiving system 31, calculation element 32, the 4th dispensing device 33, time set 34 and connects finishing device 35.
The 3rd dispensing device 21 being contained in user's switching device shifter 2 first sends the measurement report information corresponding to described target BS to the source base station corresponding with described user's set.
Then, the first receiving device 11 being contained in base station switching device shifter 1 receives the measurement report information from described user's set.
When judging to start handover operation according to measurement report information, distance determining device 12 determines the range information of described user's set and described target BS.
Preferably, described distance determining device 12 determines described range information by self comprising with lower device: loss determining device (not shown), the first incidence angle determining device (not shown), the first son distance determining device (not shown), the second incidence angle determining device (not shown) and the second son distance determining device (not shown).
Wherein, loss determining device is according to the path loss uploading the up link of link power determination user's set of user's set.
First incidence angle determining device, based on multiple antennas DOA technology, determines first incidence angle of described user's set relative to described source base station.
First son distance determining device, based on the path loss of channelling mode and user's set, determines the distance between described user's set and described source base station.
Second incidence angle determining device, based on the position of known target BS, determines second incidence angle of described user's set relative to described target BS.
Second son distance determining device is according to described first incidence angle, distance between described user's set and described source base station, and described second incidence angle, determines the range information between described user's set and described target BS by trigonometric function.
It should be noted that, described first incidence angle determining device, the first son distance determining device and described second incidence angle determining device not priority operating sequence.
Then, the first dispensing device 13 sends handover request information to target BS; Wherein, described handover request packets of information is containing described range information.
Then, the 4th receiving system 31 be contained in the jockey 3 of target BS receives the handover request information from described source base station.
Calculation element 32 calculates according to the range information in described handover request information and obtains Timing Advance information.
Particularly, described calculation element 32 obtains the range information of user's set and the target BS comprised in described handover request information, and by described range information and the velocity of radio waves, determines Timing Advance information.
Then, the 4th dispensing device 33 sends the switching confirmation comprising described Timing Advance information to described source base station.
Then, the second receiving system 14 be contained in the base station switching device shifter 1 of source base station receives the described switching confirmation from target BS.
Switching information of base station is sent to described user's set by the second dispensing device 15, and wherein, described switching information of base station comprises RRC reconfiguration information, Timing Advance information and do not perform the information of Stochastic accessing.
Then, the 3rd receiving system 22 be contained in user's switching device shifter 2 of user's set receives the described switching information of base station from described source base station.
Then switch synchronizer 23 according to described switching information of base station, be separated with source base station and carry out synchronous with target BS.
Particularly, described switching synchronizer 23 disconnects described linking with described source base station, and according to the simultaneous operation of the Timing Advance information and executing in described switching information of base station and target BS.
Then, connect dispensing device 24 and comprise the message of described RRC reconfiguration information to complete the connection with target BS to described target BS transmission.
Wherein, the time set 34 be contained in the jockey 3 of target BS is determined to enforce the time of implementation of uplink scheduling based on the Timing Advance information that aforementioned 4th receiving system 31 obtains and carries out timing.
Preferably, described time set 34 determines the described time of implementation based on following formula according to Timing Advance information:
forced_UL_scheduling＝initial_forced_UL_scheduling-(HO_successful_ratio-target_HO_successful_ratio)/target_HO_successful_ratio*step。
Then, when time set 34 judges to arrive the time of implementation, connection finishing device 35 receives the RRC reconfiguration information from user's set, connects to complete.
According to method of the present invention, user's set can send directly to target BS the Message3 comprising RRC reconfiguration information, and complete Stochastic accessing with target BS by performing the step corresponding with Message1 and Message2 without the need to elder generation, thus avoid the stand-by period of causing owing to performing the step corresponding with Message1 and Message2, improve efficiency during cell merge.Wherein, the average turn-on time needed for common scheme is 40 to 60TTIs, and on average can be shortened about 14TTIs turn-on time according to the solution of the present invention, can shorten the turn-on time of about 23%-35%, thus larger minimizing user drop rate.
Fig. 2 illustrates the method flow diagram for user's set to be switched to target BS by source base station of one aspect of the present invention.Method according to the present invention comprises the step S11, step S12, step S13, step S14 and the step S15 that are performed by source base station, the step S21 performed by user's set, step S22, step S23 and step S24, and the step S31, step S32, step S33, step S34 and the step S35 that are performed by target BS.
In the step s 21, described user's set sends the measurement report information corresponding to described target BS to described source base station.
Then, in step s 11, source base station receives the measurement report information from described user's set.
In step s 11, when source base station judges to start handover operation according to measurement report information, source base station determines the range information of described user's set and described target BS.
Preferably, described step S11 is further comprising the steps of: step S111 (not shown), step S112 (not shown), step S113 (not shown), step S114 (not shown) and step S115 (not shown).
Wherein, in step S111, source base station is according to the path loss uploading the up link of link power determination user's set of user's set.
In step S112, source base station, based on multiple antennas DOA technology, determines first incidence angle of described user's set relative to described source base station.
In step S113, source base station, based on the path loss of channelling mode and user's set, determines the distance between described user's set and described source base station.
In step S114, source base station, based on the position of known target BS, determines second incidence angle of described user's set relative to described target BS.
In step sl 15, source base station is according to described first incidence angle, distance between described user's set and described source base station, and described second incidence angle, determines the range information between described user's set and described target BS by trigonometric function.
It should be noted that, the execution of described step S113, step S114 and step S115 does not have sequencing.
Then, in step s 13, source base station sends handover request information to target BS; Wherein, described handover request packets of information is containing described range information.
Then, in step S31, target BS receives the handover request information from described source base station.
In step s 32, target BS calculates according to the range information in described handover request information and obtains Timing Advance information.
Particularly, target BS obtains the range information of user's set and the target BS comprised in described handover request information, and by described range information and the velocity of radio waves, determines Timing Advance information.
Then, in step S33, target BS sends the switching confirmation comprising described Timing Advance information to described source base station.
Then, in step S14, source base station receives the described switching confirmation from target BS.
In step S15, switching information of base station is sent to described user's set by source base station, and wherein, described switching information of base station comprises RRC reconfiguration information, Timing Advance information and do not perform the information of Stochastic accessing.
Then, in step S22, user's set receives the described switching information of base station from described source base station.
In step S23, user's set, according to described switching information of base station, is separated with source base station and carries out synchronous with target BS.
Particularly, user's set disconnects described linking with described source base station, and according to the simultaneous operation of the Timing Advance information and executing in described switching information of base station and target BS.
Then, in step s 24 which, user's set comprises the message of described RRC reconfiguration information to complete the connection with target BS to described target BS transmission.
Wherein, in step S34, target BS is determined the time of implementation of compulsory execution uplink scheduling based on the Timing Advance information obtained in abovementioned steps S31 and is carried out timing.
Preferably, target BS determines the described time of implementation based on following formula according to Timing Advance information:
forced_UL_scheduling＝initial_forced_UL_scheduling-(HO_successful_ratio-target_HO_successful_ratio)/target_HO_successful_ratio*step。
It should be noted that, described step S34 can start to perform after step S32 is finished.
Then, in step s 35, when judging to arrive the time of implementation, target BS receives the RRC reconfiguration information from user's set, connects to complete.
According to method of the present invention, user's set can send directly to target BS the Message3 comprising RRC reconfiguration information, and complete Stochastic accessing with target BS by performing the step corresponding with Message1 and Message2 without the need to elder generation, thus avoid the stand-by period of causing owing to performing the step corresponding with Message1 and Message2, improve efficiency during cell merge., wherein, the average turn-on time needed for common scheme is 40 to 60TTIs, and on average can be shortened about 14TTIs turn-on time according to the solution of the present invention, can shorten the turn-on time of about 23%-35%, thus larger minimizing user drop rate.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.Multiple unit of stating in system claims or device also can be realized by software or hardware by a unit or device.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (9)
1. for user's set to be switched to a base station switching device shifter for target BS by source base station, described base station switching device shifter is contained in the source base station corresponding with described user's set, and wherein, described base station switching device shifter comprises:
First receiving device, for receiving the measurement report information from described user's set;
Distance determining device, for when judging to start handover operation according to measurement report information, determines the range information of described user's set and described target BS;
First dispensing device, for sending handover request information to target BS; Wherein, described handover request packets of information is containing described range information;
Second receiving system, for receiving the switching confirmation from target BS, wherein, comprises the Timing Advance information of described target BS relative to described user's set in described switching confirmation;
Second dispensing device, for switching information of base station is sent to described user's set, wherein said switching information of base station comprises RRC reconfiguration information, Timing Advance information and does not perform the information of Stochastic accessing.
2. base station according to claim 1 switching device shifter, wherein, described distance determining device comprises:
Loss determining device, for the path loss uploading the up link of link power determination user's set according to user's set;
First incidence angle determining device, for based on multiple antennas DOA technology, determines first incidence angle of user's set relative to source base station;
First son distance determining device, for the path loss based on channelling mode and user's set, determines the distance between user's set and source base station;
Second incidence angle determining device, for the position based on known target BS, determines second incidence angle of user's set relative to target BS;
Second son distance determining device, for according to described first incidence angle, distance between described user's set and source base station, and described second incidence angle, determine the range information between user's set and target BS by trigonometric function.
3. for user's set to be switched to user's switching device shifter of target BS by source base station, described user's switching device shifter is contained in described user's set, and wherein, described user's switching device shifter comprises:
3rd dispensing device, for sending the measurement report information to described target BS to the source base station corresponding with described user's set;
3rd receiving system, for receiving the switching information of base station from described source base station, wherein, described switching information of base station comprises RRC reconfiguration information, Timing Advance information and does not perform the information of Stochastic accessing;
Switch synchronizer, for being separated with source base station and carrying out synchronous with target BS;
Connect dispensing device, for comprising the message of RRC reconfiguration information to complete connection to described target BS transmission.
4. for user's set to be switched to a jockey for target BS by source base station, described jockey is contained in described target BS, and wherein, described jockey comprises:
4th receiving system, for receiving the handover request information from described source base station; Wherein, described handover request packets of information contains the range information of described user's set and described target BS;
Calculation element, obtains Timing Advance information for calculating according to described range information;
4th dispensing device, for sending the switching confirmation comprising the information of described Timing Advance to described source base station;
Timing determining device, for determining the time of implementation of compulsory execution uplink scheduling and carrying out timing based on described Timing Advance information;
Connect finishing device, for when arriving the time of implementation, compulsory execution uplink scheduling is until the RRC reconfiguration information of successfully decoding from user's set connects to complete.
5., for user's set to be switched to a switched system for target BS by source base station, described switched system comprises base station as claimed in claim 1 or 2 switching device shifter, user's switching device shifter as claimed in claim 3 and jockey as claimed in claim 4.
6., for user's set to be switched to a method for target BS by source base station, wherein, said method comprising the steps of:
A source base station receives the measurement report information from described user's set;
B source base station, when judging to start handover operation according to measurement report information, determines the range information of described user's set and described target BS;
C source base station sends handover request information to target BS; Wherein, described handover request packets of information is containing described range information;
D source base station receives the switching confirmation from target BS, wherein, comprises the Timing Advance information of described target BS relative to described user's set in described switching confirmation;
Switching information of base station is sent to described user's set by e source base station, and wherein said switching information of base station comprises RRC reconfiguration information, Timing Advance information and do not perform the information of Stochastic accessing.
7. method according to claim 6, wherein, described step b comprises the following steps:
-source base station is according to the path loss uploading the up link of link power determination user's set of user's set;
-source base station, based on multiple antennas DOA technology, determines first incidence angle of user's set relative to source base station;
-source base station, based on the path loss of channelling mode and user's set, determines the distance between user's set and source base station;
-source base station, based on the position of known target BS, determines second incidence angle of user's set relative to target BS;
-source base station is according to described first incidence angle, distance between described user's set and source base station, and described second incidence angle, determines the range information between user's set and target BS by trigonometric function.
8. the method according to claim 6 or 7, wherein, described method is further comprising the steps of:
-user's set sends the measurement report information to described target BS to the source base station corresponding to it;
-user's set receives the switching information of base station from described source base station, and wherein, described switching information of base station comprises RRC reconfiguration information, Timing Advance information and do not perform the information of Stochastic accessing;
-user's set is separated with source base station and carries out synchronous with target BS;
-user's set comprises the message of RRC reconfiguration information to complete connection to described target BS transmission.
9. the method according to claim 6 or 7, wherein, described method is further comprising the steps of:
-target BS receives the handover request information from described source base station; Wherein, described handover request packets of information contains the range information of described user's set and described target BS;
-target BS calculates according to described range information and obtains Timing Advance information;
-target BS sends the switching confirmation comprising described Timing Advance information to source base station;
-target BS is determined the time of implementation of compulsory execution uplink scheduling based on described Timing Advance information and is carried out timing;
-when arriving the time of implementation, target BS enforces uplink scheduling until the RRC reconfiguration information of successfully decoding from user's set connects to complete.
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| CN104735612B (en) * | 2013-12-23 | 2019-08-13 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for being communicated between target BS and user equipment |
| CN109819490B (en) * | 2014-10-30 | 2020-10-27 | 华为技术有限公司 | Method, device and system for switching among cells |
| CN107454634A (en) * | 2016-06-01 | 2017-12-08 | 中兴通讯股份有限公司 | A kind of method being switched fast, the device being switched fast, terminal and base station |
| CN106792557B (en) * | 2016-12-13 | 2021-01-15 | 武汉虹信科技发展有限责任公司 | Data scheduling method in LTE (Long term evolution) rail transit scene |
| CN111698735A (en) * | 2019-03-12 | 2020-09-22 | 华为技术有限公司 | Communication method and communication device in wireless communication technical field |
| WO2021174429A1 (en) * | 2020-03-03 | 2021-09-10 | Nokia Shanghai Bell Co., Ltd. | Measurement report in handover |
| CN113518418A (en) * | 2020-04-09 | 2021-10-19 | 华为技术有限公司 | Communication method and device |
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