CN101588624B - Method and device for determining target cell - Google Patents
Method and device for determining target cell Download PDFInfo
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- CN101588624B CN101588624B CN2008101126872A CN200810112687A CN101588624B CN 101588624 B CN101588624 B CN 101588624B CN 2008101126872 A CN2008101126872 A CN 2008101126872A CN 200810112687 A CN200810112687 A CN 200810112687A CN 101588624 B CN101588624 B CN 101588624B
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Abstract
The invention discloses a method and a device for determining a target cell, which is suitable for determining the target cell when a mobile terminal moves along a designated area. The method comprises the following steps of: determining a first cell sequence which is formed by cells passed in sequence by the mobile terminal in the designated area after establishing a call connection; determining a sub sequence which comprises a current service cell of the mobile terminal from the first cell sequence, and matching a matching cell sequence which comprises the sub sequence from each predetermined each second cell sequence respectively; determining that the next cell of the current service cell in the matching cell sequence is a target adjacent area of the mobile terminal; and determining that the cell meeting the switching condition in the target adjacent area is the target cell of the mobile terminal. The cell can be quickly and accurately switched to the cell with the same direction asthe movement direction in the process that the mobile terminal fast moves so as to reduce time delay of a switch judgment and call dropping caused by switching.
Description
Technical field
The present invention relates to moving communicating field, refer to that especially a kind of portable terminal Target cell when mobile in the appointed area determines method and device.
Background technology
Along with improving constantly of the level of economic development and continuing to increase of infrastructure construction dynamics, high speed means of transportation such as highway, high-speed railway, subway and magnetic suspension are increasing.How providing the mobile network to cover solution in this high-speed motion scene is major issue during the mobile network runs, builds.
Portable terminal realizes that in moving process the step that switch the sub-district is at present:
1. (Radio Network Controller RNC) issues handover measurement control (Measurement Conetrol) message and gives mobile terminal UE radio network controller;
2.UE according to the measurement control messages that radio network controller (RNC) issues, neighbor cell is measured, satisfy switching condition after, reporting measurement reports (Measurement Report) is given RNC;
3.RNC the measurement report that UE is reported and the threshold values of setting compare, and determine whether and need switch;
4. by Signalling exchange between RNC and the base station node B, carry out and switch.
Under high speed environment such as highway, high-speed railway, subway and magnetic suspension, the translational speed of customer mobile terminal itself is very fast, if use above-mentioned changing method, under the certain situation of handover delay, in order to switch the switching time that provides enough for portable terminal in the minizone, for common low speed environments, need bigger covering overlapping area be set in each minizone, in other words, need the distance between base station and the base station to reduce, therefore need to build more base station, increased construction cost.If the time delay of accelerating switch decision, reducing switch decision is set by wireless parameter, the table tennis that occurs easily again causing because of signal fluctuation switches; In a single day and switch to the neighbor cell opposite with the direction of motion, because the translational speed of customer mobile terminal is very fast, will certainly cause call drop.In addition, under the high speed scene, the wireless communications environment complexity also occurs easily owing to switching to the phenomenon that wrong sub-district causes call drop.Therefore, need new technical solution avoids taking place table tennis switching and call drop in high speed moving field scapes such as highway, high-speed railway, urban track traffic generation.
Summary of the invention
The embodiment of the invention provides a kind of Target cell to determine method and device, realizes determining faster, exactly portable terminal Target cell when mobile in the appointed area.
A kind of Target cell is determined method, comprising:
Determine portable terminal in the appointed area set up to call out connect after first sequence of cells formed of the sub-district of process successively;
From described first sequence of cells, determine to comprise the subsequence of described portable terminal current service cell, in predetermined each second sequence of cells, match the coupling sequence of cells that comprises described subsequence respectively; Wherein, sequence of cells is formed in the sub-district crossed over successively by fixed route in the described appointed area of described each second sequence of cells;
When the next sub-district of current service cell described in the described coupling sequence of cells of determining was unique, the next sub-district of determining described current service cell was the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining is not unique, the next sub-district of determining each described current service cell is the target adjacent area of described portable terminal, or, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal according to the moving direction of the described portable terminal of determining;
Determine to satisfy in the described target adjacent area Target cell that the sub-district is described portable terminal of switching condition.
According to said method of the present invention, determine the moving direction of described portable terminal, comprising:
Frequency offseting value between the signal frequency that sends by the described portable terminal of duration calculation at interval and the centre frequency of current service cell respective base station, if each frequency offseting value be on the occasion of, and absolute value reduces, and determines that described portable terminal moves to the direction near the current service cell respective base station along described fixed route; If each frequency offseting value is a negative value, and the absolute value increase, determine that described portable terminal moves to the direction away from the current service cell respective base station along described fixed route; Or
Write down the current service cell of described portable terminal and the signal strength signal intensity of adjacent sub-district by the interval duration, determine that place, the adjacent sub-district direction that signal strength signal intensity increases gradually is the moving direction of described portable terminal; Or
Determine the positional information of described portable terminal by the interval duration,, determine the moving direction of described portable terminal according to the change in location of described portable terminal.
According to said method of the present invention, a described Target cell that the sub-district is described portable terminal determining to satisfy in the described target adjacent area switching condition specifically comprises:
Obtain the sub-district of satisfying switching condition of carrying in the measurement report of described mobile terminal reporting;
To be included in the described target adjacent area, and be included in the Target cell that a sub-district in the described measurement report is defined as described portable terminal.
According to said method of the present invention, before the sub-district of satisfying switching condition of in obtaining the measurement report of described mobile terminal reporting, carrying, also comprise:
The sending measuring control messages is given described portable terminal; Receive carrying of described mobile terminal reporting and satisfy the measurement report of the neighbor cell of switching condition; Or
Issue the measurement control messages that comprises described target neighboring BS information and give described portable terminal; Receive carrying of described mobile terminal reporting and satisfy the measurement report of the target adjacent area of switching condition.
According to said method of the present invention, if be included in the described target adjacent area, and be included in sub-district in the described measurement report and have a plurality ofly, then will a highest sub-district of this a plurality of sub-districts medium priority be defined as the Target cell of described portable terminal.
Said method of the present invention also comprises: after determining described Target cell, indicate described portable terminal to switch to described Target cell; And after finishing switching, upgrade described first sequence of cells.
Said method of the present invention also comprises: after described mobile terminal calling connects end, delete described first sequence of cells.
A kind of Target cell is determined device, comprising:
Logging modle, be used to be recorded in the appointed area portable terminal that moves set up call out connect after the sub-district of process successively, obtain first sequence of cells;
Memory module is used to store predetermined each second sequence of cells, and described each second sequence of cells is formed sequence of cells by the sub-district of being crossed over successively by fixed route in the described appointed area;
Matching module is used for determining to comprise from described first sequence of cells subsequence of described portable terminal current service cell, matches the coupling sequence of cells that comprises described subsequence respectively in predetermined each second sequence of cells;
Target adjacent area determination module is used for when the next sub-district of current service cell described in the described coupling sequence of cells of determining is unique, and the next sub-district of determining described current service cell is the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining is not unique, the next sub-district of determining each described current service cell is the target adjacent area of described portable terminal, or, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal according to the moving direction of the described portable terminal of determining;
The Target cell determination module is used for the Target cell that the sub-district is described portable terminal that switching condition is satisfied in definite described target adjacent area.
According to said apparatus of the present invention, described target adjacent area determination module comprises:
The direction judging unit is used to judge the moving direction of described portable terminal;
Determining unit is used for when the next sub-district of determining current service cell described in the described coupling sequence of cells is unique, and the next sub-district of determining described current service cell is the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining was not unique, the next sub-district of determining each described current service cell was the target adjacent area of described portable terminal; Or the moving direction of the described portable terminal that goes out according to described direction judgment unit judges, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal.
According to said apparatus of the present invention, described Target cell determination module comprises:
First transmitting element is used for the sending measuring control messages and gives described portable terminal;
First receiving element is used to receive the measurement report that carrying of described mobile terminal reporting satisfied the neighbor cell of switching condition;
First determining unit, be used for obtaining the sub-district of satisfying switching condition that the measurement report of described mobile terminal reporting carries, to be included in the described target adjacent area, and be included in the Target cell that a highest sub-district of priority in the described measurement report is defined as described portable terminal.
According to said apparatus of the present invention, described Target cell determination module comprises:
Second transmitting element is used to issue the measurement control messages that comprises described target neighboring BS information and gives described portable terminal;
Second receiving element is used to receive the measurement report that carrying of described mobile terminal reporting satisfied the target adjacent area of switching condition;
Second determining unit, a highest sub-district of priority that is used for being included in described measurement report is defined as the Target cell of described portable terminal.
Said apparatus of the present invention also comprises:
Indicating module is used to obtain the Target cell that described Target cell determination module is determined, and indicates described portable terminal to switch to described Target cell.
According to said apparatus of the present invention, described logging modle also is used for after described portable terminal is finished switching, upgrades described first sequence of cells; And after described mobile terminal calling connects end, delete described first sequence of cells.
The Target cell that the embodiment of the invention provides is determined method and device, by determine in the appointed area portable terminal set up call out connect after first sequence of cells formed of the sub-district of process successively; From described first sequence of cells, determine to comprise the subsequence of described portable terminal current service cell, in predetermined each second sequence of cells, match the coupling sequence of cells that comprises described subsequence respectively; The next sub-district of determining current service cell described in the described coupling sequence of cells is the target adjacent area of described portable terminal; Determine to satisfy in the described target adjacent area Target cell that the sub-district is described portable terminal of switching condition; By pre-determining the target adjacent area, the Target cell when determining portable terminal along the appointed area high-speed mobile quickly and accurately makes portable terminal in the fast moving process, can accurately switch to the Target cell consistent with its moving direction; Avoided switching in the sub-district opposite, and gone owing to signal fluctuation switches in the wrong sub-district with its direction of motion; Reduce the time delay of switch decision, avoided switching the call drop that causes.
Description of drawings
Fig. 1 determines the flow chart of method for Target cell in the embodiment of the invention one;
Fig. 2 is portable terminal schematic diagram when mobile in the appointed area in the embodiment of the invention one;
Fig. 3 is the principle schematic that Doppler frequency deviation is judged moving direction in the embodiment of the invention one;
Fig. 4 determines the flow chart of method for Target cell in the embodiment of the invention two;
A kind of Target cell that Fig. 5 provides for the embodiment of the invention is determined the structural representation of device;
Another Target cell that Fig. 6 provides for the embodiment of the invention is determined the structural representation of device.
Embodiment
In order to adapt to the switching demand under the high velocity environment, because the call drop that causes is switched in the sub-district, reduce the handover delay of portable terminal when solving the portable terminal high-speed mobile.The embodiment of the invention provides a kind of Target cell to determine method, according to portable terminal set up conversation connect the back the sub-district of process, determine the target adjacent area that this portable terminal may enter, determine the Target cell that satisfies switching condition according to above-mentioned target adjacent area then, and indicating mobile terminal is carried out switching.
Embodiment one:
The Target cell that the embodiment of the invention one provides is determined method, its flow chart as shown in Figure 1, execution in step is as follows:
Step S101: be recorded in the appointed area portable terminal that moves set up call out connect after the sub-district of process successively, obtain first sequence of cells.Be specially:
When portable terminal initiation/receipt of call, after setting up the calling connection, if the Serving cell at this current place of portable terminal belongs to sub-district in second sequence of cells of having stored (second sequence of cells is that sequence of cells is formed in the sub-district of setting up in advance at the appointed area, each second sequence of cells is crossed over successively by fixed route in the described appointed area), then write down this portable terminal set up call out connect after the sub-district of process successively, obtain first sequence of cells.
Preferable, if initiating a call to call out, portable terminal connects in the process of setting up, the sub-district switching has taken place, can be connected the sub-district that foundation finishes and note successively with calling out making a call, form first sequence of cells.
Be that example is elaborated with (the represented road of heavy black line bar shown in Fig. 2) the mobile mobile terminal UE a in the appointed area shown in Fig. 2 below.
At first, according to all possible mobile alignment of finding out in the appointed area, the possible mobile alignment of each bar all can be used as a fixed route, the sub-district that every fixed route is crossed over is successively formed the corresponding district sequence in order, obtain each second sequence of cells and the storage of appointed area.Wherein, the appointed area can comprise one or more highway, railway, urban track traffic etc. and has existing path.
The road of representing with the heavy black line bar shown in Fig. 2 is an example, this road can be determined from N1 to N2, N1 to N3, N2 to N3, N2 to N1, N3 to N1 and N3 to six mobile alignments of N2, set up pairing six sequence of cells of above-mentioned six mobile alignments respectively, include whole sub-districts of crossing over successively in order on the route in each sequence of cells, obtain the second sequence of cells table, as shown in table 1.
Table 1
| Sequence of cells | Cross over sub-district 1 | Cross over sub-district 2 | Cross over sub-district 3 | Cross over sub-district 4 | Cross over sub-district 5 |
| Sequence of |
Sub-district A | Sub-district B | Sub-district C | Sub-district D | Sub-district E |
| Sequence of |
Sub-district A | Sub-district B | Sub-district C | Sub-district F | -- |
| Sequence of |
Sub-district E | Sub-district D | Sub-district C | Sub-district B | Sub-district A |
| Sequence of |
Sub-district E | Sub-district D | Sub-district C | Sub-district F | -- |
| Sequence of cells 5 | Sub-district F | Sub-district C | Sub-district B | Sub-district A | -- |
| Sequence of cells 6 | Sub-district F | Sub-district C | Sub-district D | Sub-district E | -- |
Supposing that position 1 place of mobile terminal UE a in sub-district B coverage shown in Figure 2 makes a call and set up call out to connect, because sub-district B belongs to sub-district in second sequence of cells of having stored, therefore write down mobile terminal UE a set up call out connect after the sub-district of process successively.
At first, the record mobile terminal UE is set up the sub-district B that calls out place when connecting, and it is as shown in table 2 to obtain first sequence of cells.
Table 2
| Portable terminal | Through sub-district 1 | Through sub-district 2 | Through sub-district 3 | Through sub-district 4 | Through sub-district 5 |
| UEa | Sub-district B | ? | ? | ? | ? |
When mobile terminal UE a moves right position 2 to Fig. 2, finish by sub-district B after the switching of sub-district C, the sub-district C of record process upgrades its first sequence of cells, and first sequence of cells after the renewal is as shown in table 3.
Table 3
| Portable terminal | Through sub-district 1 | Through sub-district 2 | Through sub-district 3 | Through sub-district 4 | Through sub-district 5 |
| UEa | Sub-district B | Sub-district C | ? | ? | ? |
When mobile terminal UE a moves right position 3 to Fig. 2, finish by sub-district C after the switching of sub-district D, the sub-district D of record process upgrades its first sequence of cells once more.First sequence of cells after the renewal is as shown in table 4.
Table 4
| Portable terminal | Through sub-district 1 | Through sub-district 2 | Through sub-district 3 | Through sub-district 4 | Through sub-district 5 |
| UEa | Sub-district B | Sub-district C | Sub-district D | ? | ? |
After mobile terminal UE a finishes this conversation, delete its first sequence of cells.
Step S102:, match the coupling sequence of cells corresponding with this portable terminal according to second sequence of cells of first sequence of cells and storage.Be specially:
From first sequence of cells of portable terminal of record, determine to comprise the subsequence of this portable terminal current service cell, in each second sequence of cells of each bar specified path correspondence of the appointed area of storage, match the coupling sequence of cells that comprises above-mentioned subsequence respectively.
Especially, the subsequence of being got can comprise: form subsequence by all sub-districts that comprise current service cell in first sequence of cells, be about to current first sequence of cells as subsequence; Perhaps, only form subsequence by the part sub-district that comprises current service cell in first sequence of cells.
Continue to use the example of top, when the position 1 of mobile terminal UE a from Fig. 2 when move position 2, first sequence of cells of UEa in the above-mentioned table 2 is mated as second sequence of cells in subsequence and the table 1.The coupling sequence of cells that obtains comprises: the sequence of cells 1 in the table 1, sequence of cells 2, sequence of cells 3 and sequence of cells 5.
When the position 2 of mobile terminal UE a from Fig. 2 when move position 3, first sequence of cells of UEa in the above-mentioned table 3 is mated as second sequence of cells in subsequence and the table 1.The coupling sequence of cells that obtains comprises: sequence of cells 1 in the table 1 and sequence of cells 2.
When the position 3 of mobile terminal UE a from Fig. 2 continues to move right, first sequence of cells of UEa in the above-mentioned table 4 to be mated as second sequence of cells in subsequence and the table 1, the coupling sequence of cells that obtains comprises: the sequence of cells 1 in the table 1.
Especially, when the position 3 of mobile terminal UE a from Fig. 2 continues to move right, being example, can this comprise the subsequence (promptly directly using first sequence of cells) of whole sub-districts as said extracted sub-district B, sub-district C, sub-district D, can also extract sub-district C, sub-district D and form subsequence or only mate as each sequence of cells of storing in subsequence and the table 1 by sub-district D as subsequence.For example, when second sequence of cells (comprising sequence of cells 1-6) of forming the storage in subsequence and the table 1 with sub-district C, sub-district D when mating, the coupling sequence of cells that obtains comprises: sequence of cells 1 in the table 1 and sequence of cells 6.When only with sub-district D as subsequence and table 1 in second sequence of cells (comprising sequence of cells 1-6) when mating of storage, the coupling sequence of cells that obtains comprises: the sequence of cells 1 in the table 1, sequence of cells 3, sequence of cells 4 and sequence of cells 6.
As the above analysis, the sub-district that comprises in the subsequence is many more, and the coupling sequence of cells that then matches is few more; On the contrary, the sub-district that comprises in the subsequence is few more, and the coupling sequence of cells that then matches is many more.The number of cells that comprises in the subsequence can be determined according to actual conditions.
Step S103: the next sub-district of this portable terminal current service cell is the target adjacent area of this portable terminal in the coupling sequence of cells of determining to obtain.Be specially:
When the coupling sequence of cells that obtains is one, though or more than one of the coupling sequence of cells that obtains, but when the next sub-district of current service cell is identical in a plurality of coupling sequence of cells that obtain, determine the target adjacent area of the next sub-district of current service cell in the above-mentioned coupling sequence of cells for this portable terminal;
When more than one of the coupling sequence of cells that obtains, and when the next sub-district of current service cell is inequality in a plurality of coupling sequence of cells that obtain, then adopt following two kinds of methods to handle:
Method one: determine the next sub-district of current service cell in each coupling sequence of cells, with all next sub-districts that obtain all as the target adjacent area of this portable terminal.
Method two: the moving direction of this portable terminal of further determining will meet the target adjacent area of the next sub-district of current service cell in the coupling sequence of cells of this portable terminal moving direction as this portable terminal.
The method of judging the portable terminal moving direction can comprise following several:
(1) Doppler (Doppler) frequency deviation method
The moving direction of portable terminal can be judged according to signal frequency that receives the portable terminal transmission and the deviant between the base station center frequency in the base station.
Under high velocity environment, the Doppler effect in the mobile communication system is especially obvious, and the caused additional frequency displacement of Doppler effect is called Doppler frequency shift, Doppler frequency shift f
dFormulate below available:
Wherein:
θ is the moving direction of portable terminal and the angle between the signal propagation direction;
V is the translational speed of portable terminal;
C is an electromagnetic wave propagation speed;
F is a carrier frequency.
As seen, Doppler frequency shift is relevant with the angle between portable terminal moving direction and the signal propagation direction, and the principle of judging the portable terminal moving direction by the Doppler frequency deviation method as shown in Figure 3.Be specially:
According to the frequency offseting value between the centre frequency of the signal frequency of setting duration calculation portable terminal transmission at interval and current service cell respective base station, if each frequency offseting value be on the occasion of, and absolute value reduces, and determines that this portable terminal moves to the direction near the current service cell respective base station along fixed route; If each frequency offseting value is a negative value, and the absolute value increase, determine that this portable terminal moves to the direction away from the current service cell respective base station along fixed route.
The Doppler frequency deviation method is applicable under the situation of portable terminal high-speed motion, if portable terminal is in static or the low-speed motion state, adopt the Doppler frequency deviation rule can't determine the moving direction of portable terminal, so this method is specially adapted to high speed environment such as highway, railway, subway.
(2) signal strength signal intensity judgement method
According to the 3GPP25.331 code requirement, portable terminal is reporting measurement reports periodically, has comprised the signal strength signal intensity of this sub-district and adjacent sub-district in this measurement report.For example: the received signal intensity of WCDMA/TD-SCDMA system (Received Signal Code Power after dispreading, RSCP)/the mobile phone radio frequency signal strength signal intensity (RELEV) of gsm system.
By periodically obtaining several measurement reports of mobile terminal reporting, obtain the current service cell of portable terminal and several signal strength values of adjacent sub-district, relatively each sub-district obtains the size of several signal strength values, determines that place, the adjacent sub-district direction that signal strength values increases gradually is the moving direction of this portable terminal.
(3) mobile positioning information judgement method
By assistant GPS location (AGPS), the time of advent, (at least a localization method in the location methods of the prior art such as sub-district-ID+TA), observed time difference location (OTDOA), the angle of arrival (AOA) location was determined the position of portable terminal in the location.
According to default interval duration, periodically obtain the positional information of portable terminal, relatively the change in location situation of different time portable terminal according to the change in location of portable terminal, is determined the moving direction of portable terminal.
Especially, in actual application, can select a kind of moving direction of determining portable terminal in the method for above-mentioned several judgement portable terminal moving directions for use; Also can select for use several different methods in the method for above-mentioned several judgement portable terminal moving directions to determine the moving direction of portable terminal.If adopt several different methods to make up judgement, judged result appears when not quite identical, and can be by for every kind of method is provided with weight, priority is judged final result.
Continue to use top example, when the position 1 of mobile terminal UE a from Fig. 2 when move position 2, the next sub-districts of current service cell (sub-district B) are respectively in obtain three coupling sequence of cells: sub-district C and sub-district A.Then the mobile terminal UE a target adjacent area that may enter comprises: sub-district A and sub-district C.The RSCP/RELEV value that periodically receives current service cell (sub-district B) as if mobile terminal UE a is more and more littler, the RSCP/RELEV value that periodically receives adjacent sub-district (sub-district A) is also more and more littler, meanwhile, the RSCP/RELEV value that periodically receives adjacent sub-district (sub-district C) is increasing, the moving direction that then can judge this portable terminal is for to the right, and the target adjacent area should be sub-district C.
When the position 2 of mobile terminal UE a from Fig. 2 when move position 3, the next sub-districts of current service cell (sub-district C) are respectively in obtain two coupling sequence of cells: sub-district D and sub-district F.Then the mobile terminal UE a target adjacent area that may enter comprises: sub-district D and sub-district F.Then sub-district D and sub-district F all are defined as the target adjacent area of mobile terminal UE a; Or adopt at least a in the method for above-mentioned several judgement portable terminal moving directions, and judge the moving direction of mobile terminal UE a, determine the target adjacent area that a sub-district among sub-district D and the sub-district F is mobile terminal UE a.
When the position 3 of mobile terminal UE a from Fig. 2 continued to move right, the next sub-district of current service cell in the coupling sequence of cells that obtains (sub-district D) was respectively: sub-district E.Then the target adjacent area of mobile terminal UE a is sub-district E.
Step S104: the sending measuring control messages is given portable terminal.
Switch back sending measuring control messages each, or periodicity sending measuring control messages.
Step S105: the measurement report that carries the neighbor cell that satisfies switching condition that mobile terminal receive reports.
Portable terminal is measured neighbor cell according to the measuring control information that receives, find the sub-district of satisfying switching condition after, report the measurement report that carries the neighbor cell that satisfies switching condition.
Step S106: judge that whether the sub-district of satisfying switching condition that comprises in the measurement report is the sub-district in the target adjacent area of this portable terminal of obtaining.Be specially:
After receiving the measurement report of mobile terminal reporting, obtain the sub-district of satisfying switching condition of carrying in the measurement report, judge that then whether the sub-district of satisfying switching condition that comprises in the measurement report is the sub-district in the target adjacent area of this portable terminal of obtaining of step S103.
If the sub-district of satisfying switching condition that comprises in the measurement report is not the sub-district in the above-mentioned target adjacent area, then this information is abandoned, and return and re-execute step S105;
If the sub-district of satisfying switching condition that comprises in the measurement report is the sub-district in the above-mentioned target adjacent area, then execution in step S107.
Step S107: satisfy the Target cell of a sub-district of switching condition in the target adjacent area of determining to obtain for this portable terminal.Start the Signalling exchange flow process, finish the switching of portable terminal to above-mentioned qualified Target cell.
When the sub-district of satisfying switching condition in the target adjacent area has only one, determine the Target cell of this sub-district for this portable terminal; When more than one of the sub-district of satisfying switching condition in the target adjacent area, the sub-district that priority is the highest is defined as the Target cell of this portable terminal.
Wherein, native region priority can be determined according to idling-resource, level value or the carrier/interface ratio of sub-district.The standard of priority can preestablish, and for example, set the many native region priorities of idling-resource and be higher than the few sub-district of idling-resource, or the like.
Continue to use top example, when the position 1 of mobile terminal UE a from Fig. 2 when move position 2, if after receiving the measurement report that mobile terminal UE a reports, when judging the sub-district of satisfying switching condition in the measurement report and comprising sub-district C, determine that then sub-district C is a mobile terminal UE a Target cell, indicating mobile terminal UEa switches to Target cell (sub-district C) from Serving cell (sub-district B); If when judging the sub-district of satisfying switching condition in the measurement report and not comprising sub-district C, for example, owing to signal strength signal intensity fluctuation occurs, when the sub-district of satisfying switching condition in the measurement report that makes the mobile terminal UE a that receives report is sub-district A, then continue to wait for mobile terminal UE a reporting measurement reports.Thereby avoid mobile terminal UE a to move right and switched to sub-district A in the process, final because the sub-district a-signal dies down and the phenomenon of call drop.
When the position 2 of mobile terminal UE a from Fig. 2 when move position 3, when the target adjacent area of determining comprises sub-district D and sub-district F, if after receiving the measurement report that mobile terminal UE a reports, when judging the sub-district of satisfying switching condition in the measurement report and comprising among sub-district D and the sub-district F one, determine that then a sub-district that is comprised in the measurement report among sub-district D and the sub-district F is a mobile terminal UE a Target cell; If when judging the sub-district of satisfying switching condition in the measurement report and comprising sub-district D and sub-district F, then determine that according to the priority principle sub-district D and a highest sub-district of sub-district F medium priority are mobile terminal UE a Target cell; Indicating mobile terminal UEa switches to Target cell (sub-district D or sub-district F) from Serving cell (sub-district C) then.If when judging the sub-district of satisfying switching condition in the measurement report and not comprising sub-district D and sub-district F, for example, owing to the signal strength signal intensity fluctuation occurs, when the sub-district of satisfying switching condition in the measurement report that makes the mobile terminal UE a receive report is sub-district B, then continue to wait for mobile terminal UE a reporting measurement reports.
When the position 3 of mobile terminal UE a from Fig. 2 continues to move right, if after receiving the measurement report that mobile terminal UE a reports, when judging the sub-district of satisfying switching condition in the measurement report and comprising sub-district E, determine that then sub-district E is a mobile terminal UE a Target cell, indicating mobile terminal UEa switches to Target cell (sub-district E) from Serving cell (sub-district D); If when judging the sub-district of satisfying switching condition in the measurement report and not comprising sub-district E, for example, owing to signal strength signal intensity fluctuation occurs, when the sub-district of satisfying switching condition in the measurement report that makes the mobile terminal UE a that receives report is sub-district C, then continue to wait for mobile terminal UE a reporting measurement reports.
Finish to switch and return step S101 afterwards, upgrade first sequence of cells of portable terminal, said process is carried out in circulation.When portable terminal finishes this conversation, delete first sequence of cells of its correspondence.
Embodiment two:
The Target cell that the embodiment of the invention two provides is determined method, at mobile terminal records corresponding first sequence of cells, and after determining the target adjacent area of this portable terminal according to first sequence of cells of setting up, during to this portable terminal sending measuring control messages, in measuring control messages, only comprise the target neighboring BS information, by the sub-district of satisfying switching condition in the mobile terminal reporting target adjacent area.The flow chart of embodiment two as shown in Figure 4, its execution in step is as follows:
Wherein, step S201, step S202 and step S203 respectively with embodiment one in step S101, step S102 identical with step S103, repeat no more herein.
Step S204: issue the measurement control messages that comprises the target neighboring BS information and give portable terminal.
Generally switch back sending measuring control messages each, or periodicity sending measuring control messages.
Step S205: the measurement report that carries the target adjacent area of satisfying switching condition that mobile terminal receive reports.
Portable terminal is measured the target adjacent area according to the measuring control information that receives, find the sub-district of satisfying switching condition after, report the measurement report that carries the target adjacent area of satisfying switching condition.
Still be example with Fig. 2, when the position 1 of mobile terminal UE a from Fig. 2 when move position 2, only target adjacent area (sub-district C) measured, after sub-district C satisfies switching condition, the mobile terminal reporting measurement report.
When the position 2 of mobile terminal UE a from Fig. 2 when move position 3, only target adjacent area (sub-district D and sub-district F) measured, after D/ sub-district, sub-district F satisfies switching condition, the mobile terminal reporting measurement report.
When the position 3 of mobile terminal UE a from Fig. 2 continues to move right, only target adjacent area (sub-district E) measured, after sub-district C satisfies switching condition, the mobile terminal reporting measurement report.
Step S206: determine the Target cell of portable terminal, start the Signalling exchange flow process then, carry out the switching of portable terminal to Target cell.
After receiving the measurement report of mobile terminal reporting, obtain the sub-district of satisfying switching condition of carrying in the measurement report.
When the sub-district of satisfying switching condition has only one, determine that the sub-district of satisfying switching condition that obtains is the Target cell of this portable terminal, and indicating mobile terminal switches to Target cell from the current service cell switching.
When more than one of the sub-district of satisfying switching condition, determine the Target cell of a highest sub-district of the sub-district medium priority that satisfies switching condition that obtains, and indicating mobile terminal switches from current service cell and switches to Target cell for this portable terminal.
Finish to switch and return step S201 afterwards, upgrade first sequence of cells of portable terminal, said process is carried out in circulation.When portable terminal finishes this conversation, delete first sequence of cells of its correspondence.
Continue to use top example, when the position 1 of mobile terminal UE a from Fig. 2 when move position 2, the sub-district C that satisfies switching condition is the Target cell of mobile terminal UE a, and indicating mobile terminal UEa switches to sub-district C from sub-district B.
When the position 2 of mobile terminal UE a from Fig. 2 when move position 3, if when the sub-district of satisfying switching condition comprises among sub-district D and the sub-district F one, a sub-district then determining to satisfy among sub-district D and the sub-district F switching condition is a mobile terminal UE a Target cell; When comprising sub-district D and sub-district F, then determine that according to the priority principle sub-district D and a highest sub-district of sub-district F medium priority are mobile terminal UE a Target cell as if the sub-district of satisfying switching condition; And indicating mobile terminal UEa switches to sub-district D or sub-district F from sub-district C.
When the position 3 of mobile terminal UE a from Fig. 2 continued to move right, the sub-district E that satisfies switching condition was the Target cell of mobile terminal UE a, and indicating mobile terminal UEa switches to sub-district E from sub-district D.
The foregoing description one and embodiment two when mobile, determine its Target cell so that carry out the process that switch the sub-district at a portable terminal in the appointed area.In actual applications, can set up the first sequence of cells table of the portable terminal of a sky in advance, first sequence of cells of each portable terminal of record is stored as a list records in the table.After portable terminal is set up the calling connection,, after the calling connection finishes, delete the corresponding list records of this portable terminal in the list records that the first sequence of cells table adds this portable terminal.
Especially, the cell switch determining method that embodiment one and embodiment two are provided can use separately, also can use simultaneously.
Target cell according to embodiments of the invention one is determined method, can make up a kind of Target cell and determine device, as shown in Figure 5, comprising: logging modle 101, memory module 102, matching module 103, target adjacent area determination module 104 and Target cell determination module 105a.
Target adjacent area determination module 104, the next sub-district of the coupling sequence of cells current service cell that is used for determining that matching module 103 obtains is the target adjacent area of this portable terminal.
Preferable, target adjacent area determination module 104 further can comprise: direction judging unit 1041 and determining unit 1042.
Determining unit 1042 when the coupling sequence of cells that is used for obtaining when matching module 103 is one, is determined the target adjacent area of the next sub-district of current service cell in this coupling sequence of cells for this portable terminal; During more than one of the coupling sequence of cells that obtains when matching module 103, determine the target adjacent area of next sub-district of current service cell in each coupling sequence of cells for this portable terminal; Or the moving direction of the portable terminal of determining according to direction judging unit 1041, will meet the target adjacent area of the next sub-district of current service cell in the coupling sequence of cells of this moving direction as this portable terminal.
Target cell determination module 105a is used for determining that it is the Target cell of this portable terminal that a sub-district of switching condition is satisfied in the target adjacent area.
Preferable, Target cell determination module 105a further comprises: first transmitting element 1051, first receiving element 1052 and first determining unit 1053.
First transmitting element 1051 is used for the sending measuring control messages and gives portable terminal.
First receiving element 1052 is used for the measurement report that carries the neighbor cell that satisfies switching condition that mobile terminal receive reports.
First determining unit 1053, be used for obtaining the sub-district of satisfying switching condition that the measurement report of mobile terminal reporting carries, to be included in the target adjacent area that target adjacent area determination module 104 obtains, and be included in the Target cell that a highest sub-district of priority in the measurement report that first receiving element 1052 receives is defined as this portable terminal.
Above-mentioned Target cell is determined device, also comprises: indicating module 106, be used to obtain the Target cell that Target cell determination module 105a determines, and indicating mobile terminal switches to this Target cell.
Target cell according to embodiments of the invention two is determined method, can also make up another kind of Target cell and determine device, as shown in Figure 6, comprising: logging modle 101, memory module 102, matching module 103, target adjacent area determination module 104 and Target cell determination module 105b.Also comprise: indicating module 106.Wherein:
Preferable, Target cell determination module 105b further comprises: second transmitting element 1056, second receiving element 1057 and second determining unit 1058.
Second determining unit 1058, the highest sub-district of the priority that is used for being included in the measurement report that second receiving element 1057 receives is for determining the Target cell of this portable terminal.
Indicating module 106 is used to obtain the Target cell that Target cell determination module 105b determines, and indicating mobile terminal switches to this Target cell.
All the other modular structures and function determine that with the Target cell that makes up according to embodiment one corresponding module in the device is identical, do not repeat them here.
The Target cell that the embodiment of the invention provides is determined method and device, by be recorded in the appointed area portable terminal that moves set up call out connect after the sub-district of process successively, obtain first sequence of cells, from described first sequence of cells, determine to comprise the subsequence of described portable terminal current service cell, in predetermined each second sequence of cells, match the coupling sequence of cells that comprises described subsequence respectively, and the next sub-district of finding current service cell in the described coupling sequence of cells, determine the target adjacent area of portable terminal, simplified the neighboring BS relationship of portable terminal; According to the measurement report of the target adjacent area of determining, determine to satisfy in the described target adjacent area Target cell that the sub-district is a portable terminal of switching condition with the mobile terminal reporting that receives.
By pre-determining the target adjacent area, determine portable terminal Target cell during high-speed mobile in the appointed area faster, exactly; Make portable terminal in the fast moving process, can accurately switch in the sub-district consistent and go with its moving direction; Avoided switching in the sub-district opposite with its direction of motion, and gone owing to signal fluctuation switches in the wrong sub-district, it is quick, accurate that the sub-district is switched; Reduced the time delay of switch decision, avoided switching the call drop and the table tennis that cause and switched.
By in the measurement control messages that issues, carrying the target neighboring BS information of determining, make portable terminal to measure at the target adjacent area, reduce the number of sub-district to be measured, thereby reduced measurement and time delay for switching.
The inventive method can also further be judged the moving direction that is in the portable terminal of calling out connection status, accurately determine unique target adjacent area of portable terminal, under the prerequisite of the framework that does not change existing network, realized quicker, the accurate switching of portable terminal under high velocity environment.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily, replace or be applied to other similar devices, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (13)
1. a Target cell is determined method, it is characterized in that, comprising:
Determine portable terminal in the appointed area set up to call out connect after first sequence of cells formed of the sub-district of process successively;
From described first sequence of cells, determine to comprise the subsequence of described portable terminal current service cell, in predetermined each second sequence of cells, match the coupling sequence of cells that comprises described subsequence respectively; Wherein, sequence of cells is formed in the sub-district crossed over successively by fixed route in the described appointed area of described each second sequence of cells;
When the next sub-district of current service cell described in the described coupling sequence of cells of determining was unique, the next sub-district of determining described current service cell was the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining is not unique, the next sub-district of determining each described current service cell is the target adjacent area of described portable terminal, or, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal according to the moving direction of the described portable terminal of determining;
Determine to satisfy in the described target adjacent area Target cell that the sub-district is described portable terminal of switching condition.
2. the method for claim 1 is characterized in that, determines the moving direction of described portable terminal, comprising:
Frequency offseting value between the signal frequency that sends by the described portable terminal of duration calculation at interval and the centre frequency of current service cell respective base station, if each frequency offseting value be on the occasion of, and absolute value reduces, and determines that described portable terminal moves to the direction near the current service cell respective base station along described fixed route; If each frequency offseting value is a negative value, and the absolute value increase, determine that described portable terminal moves to the direction away from the current service cell respective base station along described fixed route; Or
Write down the current service cell of described portable terminal and the signal strength signal intensity of adjacent sub-district by the interval duration, determine that place, the adjacent sub-district direction that signal strength signal intensity increases gradually is the moving direction of described portable terminal; Or
Determine the positional information of described portable terminal by the interval duration,, determine the moving direction of described portable terminal according to the change in location of described portable terminal.
3. the method for claim 1 is characterized in that, a described Target cell that the sub-district is described portable terminal determining to satisfy in the described target adjacent area switching condition specifically comprises:
Obtain the sub-district of satisfying switching condition of carrying in the measurement report of described mobile terminal reporting;
To be included in the described target adjacent area, and be included in the Target cell that a sub-district in the described measurement report is defined as described portable terminal.
4. method as claimed in claim 3 is characterized in that, before the sub-district of satisfying switching condition of carrying in obtaining the measurement report of described mobile terminal reporting, also comprises:
The sending measuring control messages is given described portable terminal; Receive carrying of described mobile terminal reporting and satisfy the measurement report of the neighbor cell of switching condition; Or
Issue the measurement control messages that comprises described target neighboring BS information and give described portable terminal; Receive carrying of described mobile terminal reporting and satisfy the measurement report of the target adjacent area of switching condition.
5. method as claimed in claim 4 is characterized in that, if be included in the described target adjacent area, and be included in sub-district in the described measurement report and have a plurality ofly, then will a highest sub-district of this a plurality of sub-districts medium priority be defined as the Target cell of described portable terminal.
6. the method for claim 1 is characterized in that, also comprises: after determining described Target cell, indicate described portable terminal to switch to described Target cell; And after finishing switching, upgrade described first sequence of cells.
7. as the arbitrary described method of claim 1-6, it is characterized in that, also comprise: after described mobile terminal calling connects end, delete described first sequence of cells.
8. a Target cell is determined device, it is characterized in that, comprising:
Logging modle, be used to be recorded in the appointed area portable terminal that moves set up call out connect after the sub-district of process successively, obtain first sequence of cells;
Memory module is used to store predetermined each second sequence of cells, and described each second sequence of cells is formed sequence of cells by the sub-district of being crossed over successively by fixed route in the described appointed area;
Matching module is used for determining to comprise from described first sequence of cells subsequence of described portable terminal current service cell, matches the coupling sequence of cells that comprises described subsequence respectively in predetermined each second sequence of cells;
Target adjacent area determination module is used for when the next sub-district of current service cell described in the described coupling sequence of cells of determining is unique, and the next sub-district of determining described current service cell is the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining is not unique, the next sub-district of determining each described current service cell is the target adjacent area of described portable terminal, or, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal according to the moving direction of the described portable terminal of determining;
The Target cell determination module is used for the Target cell that the sub-district is described portable terminal that switching condition is satisfied in definite described target adjacent area.
9. device as claimed in claim 8 is characterized in that, described target adjacent area determination module comprises:
The direction judging unit is used to judge the moving direction of described portable terminal;
Determining unit is used for when the next sub-district of determining current service cell described in the described coupling sequence of cells is unique, and the next sub-district of determining described current service cell is the target adjacent area of described portable terminal; When the next sub-district of current service cell described in the described coupling sequence of cells of determining was not unique, the next sub-district of determining each described current service cell was the target adjacent area of described portable terminal; Or the moving direction of the described portable terminal that goes out according to described direction judgment unit judges, will meet the target adjacent area of the next sub-district of current service cell described in the coupling sequence of cells of described moving direction as described portable terminal.
10. install as claimed in claim 8 or 9, it is characterized in that described Target cell determination module comprises:
First transmitting element is used for the sending measuring control messages and gives described portable terminal;
First receiving element is used to receive the measurement report that carrying of described mobile terminal reporting satisfied the neighbor cell of switching condition;
First determining unit, be used for obtaining the sub-district of satisfying switching condition that the measurement report of described mobile terminal reporting carries, to be included in the described target adjacent area, and be included in the Target cell that a highest sub-district of priority in the described measurement report is defined as described portable terminal.
11. install as claimed in claim 8 or 9, it is characterized in that described Target cell determination module comprises:
Second transmitting element is used to issue the measurement control messages that comprises described target neighboring BS information and gives described portable terminal;
Second receiving element is used to receive the measurement report that carrying of described mobile terminal reporting satisfied the target adjacent area of switching condition;
Second determining unit, a highest sub-district of priority that is used for being included in described measurement report is defined as the Target cell of described portable terminal.
12. device as claimed in claim 8 is characterized in that, also comprises:
Indicating module is used to obtain the Target cell that described Target cell determination module is determined, and indicates described portable terminal to switch to described Target cell.
13. device as claimed in claim 8 is characterized in that, described logging modle also is used for after described portable terminal is finished switching, upgrades described first sequence of cells; And after described mobile terminal calling connects end, delete described first sequence of cells.
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| CN2008101126872A CN101588624B (en) | 2008-05-23 | 2008-05-23 | Method and device for determining target cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102480769A (en) * | 2010-11-24 | 2012-05-30 | 中兴通讯股份有限公司 | Cell switching method and base station controller |
| WO2011107054A2 (en) * | 2011-04-20 | 2011-09-09 | 华为技术有限公司 | Method for transmitting neighboring cell information of multi-site cell, apparatus and system thereof |
| CN102917421B (en) * | 2011-08-05 | 2015-07-15 | 北京信威通信技术股份有限公司 | Method and system for realizing rapid switching in communication network |
| US9414276B2 (en) | 2011-12-31 | 2016-08-09 | Telefonaktiebolaget L M Ericsson (Publ) | Mobility management method and apparatus in high speed railway |
| CN105376810A (en) * | 2014-08-13 | 2016-03-02 | 中兴通讯股份有限公司 | Method and device for improving cell switching speed |
| CN105188097B (en) * | 2015-08-31 | 2018-06-15 | 宇龙计算机通信科技(深圳)有限公司 | Method of handover and base station under a kind of scene based on high ferro |
| CN110505686B (en) * | 2016-03-31 | 2020-12-25 | 展讯通信（上海）有限公司 | Mobile terminal positioning method and device |
| CN107396371B (en) * | 2017-07-13 | 2020-07-03 | 深圳市盛路物联通讯技术有限公司 | Frequency point selection method and related product |
| CN109982395B (en) * | 2017-12-27 | 2021-05-04 | 中国移动通信集团吉林有限公司 | Method and device for configuring switching parameters |
| CN111222364B (en) * | 2018-11-23 | 2023-08-18 | 中移物联网有限公司 | Meter reading method and meter reading device |
| CN113286333B (en) * | 2020-02-19 | 2022-08-19 | 华为技术有限公司 | Network selection method and device |
| CN113810962A (en) * | 2020-06-16 | 2021-12-17 | 中兴通讯股份有限公司 | Cell switching method, device, communication equipment and storage medium |
| CN114339904B (en) * | 2020-09-30 | 2024-05-24 | 北京小米移动软件有限公司 | Cell switching method, cell switching device and storage medium |
| CN115166798A (en) * | 2022-06-27 | 2022-10-11 | 北京邮电大学 | Ambiguity fixing method and device in rail transit scene and train positioning terminal |
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