CN102088744A - Method for realizing quick cell reselection for mobile equipment in mobile communication system - Google Patents
Method for realizing quick cell reselection for mobile equipment in mobile communication system Download PDFInfo
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- CN102088744A CN102088744A CN2009102000927A CN200910200092A CN102088744A CN 102088744 A CN102088744 A CN 102088744A CN 2009102000927 A CN2009102000927 A CN 2009102000927A CN 200910200092 A CN200910200092 A CN 200910200092A CN 102088744 A CN102088744 A CN 102088744A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a method for realizing quick cell reselection for mobile equipment in a mobile communication system. The method comprises the following steps of: during monitoring of a service cell and an adjacent cell, maintaining all quasi-target cells which meet a certain condition but not meet a cell reselection condition in the aspect of measured level value; and when the quasi-target cells meet the reselection condition, reselecting the quasi-target cells. By adopting the method for realizing quick cell reselection of the mobile equipment in the mobile communication system, a plurality of reselection quasi-target cells can be monitored in advance, the overall network coverage situation in the range of the mobile equipment is known, advantages are drawn on, disadvantages are avoided, a cell reselection process is accelerated, and the success rate of reselection operation is higher; simultaneously, frequent signaling interaction caused by blind cell reselection in a network can be effectively reduced, operation cost is saved, wireless communication service quality is enhanced, operation efficiency is improved, energy is saved, consumption is lowered, working performance is stable and reliable, an application range is wide, and the solid foundation is laid for further development of a modern mobile communication technology.
Description
Technical field
The present invention relates to wireless communication field, particularly mobile device cell reselection technique field in the wireless communication system is meant that specifically mobile device in a kind of mobile communication system realizes the method for fast cell re-selection.
Background technology
In mobile communication system, portable terminal (UE) need carry out cell selecting and sub-district park operation after start.Get off in case proper cell of UE selection is resident, UE will produce a candidate cell tabulation, and this comprises selecteed sub-district and neighbor cell.The information of relevant neighbor cell obtains in the measuring control information that UE can be comprised from the system information of current persistent district.
The purpose of sub-district gravity treatment is exactly according to measurement result, finds more from candidate cell tabulation that the sub-district of " suitable " is resident gets off.When UE after a sub-district is resident, UE will monitor the system broadcast information of respective service sub-district, and measuring process is carried out in the adjacent sub-district in the coverage, determine that according to measurement result and adjacent system information of subdistricts the Target cell of gravity treatment tabulates.The select target sub-district is carried out the sub-district gravity treatment and is obtained system broadcast information on the broadcast channel of this sub-district, judges whether to satisfy again and is stationed condition, finishes and is stationed.UE may carry out cell reselection process under idle pulley and connection mode.
Summary is got off, and traditional sub-district gravity treatment generally comprises following step:
(1) at first measures, judge that according to measurement result needs carry out the sub-district gravity treatment;
(2) select target sub-district again obtains the system information on this CBCH;
(3) judge whether again and can be stationed.
Finish the change of a sub-district by above three steps.But can see, when the select target sub-district, mobile device is uncomprehending at all to all optional targets, that is to say, determine that the gravity treatment target is blindly, does not know whether this Target cell is forbidden by network, perhaps do not know this Target cell whether be with current service cell belong to a RNC or the like, because there is not the blindness that then causes the sub-district gravity treatment in these information, increased the possibility of gravity treatment failure, also increased the signaling consumption of the whole network after gravity treatment is successful.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of can be more fast and carry out the sub-district gravity treatment targetedly, avoid that Signalling exchange, reselection operation success rate a large amount of after the failure of sub-district gravity treatment and the gravity treatment is higher as far as possible, stable and reliable working performance, the scope of application comparatively widely in the mobile communication system mobile device realize the method for fast cell re-selection.
In order to realize above-mentioned purpose, mobile device realizes that the method for fast cell re-selection is as follows in the mobile communication system of the present invention:
Mobile device is realized the method for fast cell re-selection in this mobile communication system, and its main feature is that described method may further comprise the steps:
(1) mobile device carries out the cell selecting process after starting shooting successfully, finds Serving cell and is stationed and network registry, and produce adjacent subdistrict frequency point tabulation according to the system information of Web broadcast;
(2) mobile device carries out the maintenance of gravity treatment standard target cell list;
(3) when mobile device need carry out the sub-district gravity treatment, carry out the cell reselection process operation according to described gravity treatment standard target cell list.
The gravity treatment standard target cell list that carries out in this mobile communication system in the method for mobile device realization fast cell re-selection is safeguarded, may further comprise the steps:
(11) mobile device carries out the generation processing of gravity treatment standard target cell list;
(12) mobile device carries out the Synchronous Processing operation to the not synchronized cells that satisfies synchronization criterion.
Mobile device in this mobile communication system in the method for mobile device realization fast cell re-selection carries out the generation of gravity treatment standard target cell list to be handled, and may further comprise the steps:
(111) mobile device monitors Serving cell and the adjacent sub-district in its area of coverage and carries out signal quality measured;
(112) mobile device obtains corresponding measurement result and this measurement result is sorted;
(113) judge whether to exist effective measurement result; If there is no, then finish and return above-mentioned steps (1);
(114) if exist, then select the best sub-district of signal quality in the measurement result;
(115) judge whether the best sub-district of this signal quality satisfies the measurement reselection conditions;
(116) if satisfy, then satisfy the gravity treatment standard target cell list attended operation of measuring under the reselection conditions;
(117), then carry out not satisfying the gravity treatment standard target cell list attended operation of measuring under the reselection conditions if do not satisfy.
Gravity treatment standard target cell list attended operation under the satisfied measurement reselection conditions in this mobile communication system in the method for mobile device realization fast cell re-selection may further comprise the steps:
(1161) judge that this satisfies the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(1162) if this sub-district has been present in the gravity treatment standard target cell list, then return above-mentioned steps (113);
(1163) if this sub-district not in gravity treatment standard target cell list, then this sub-district is added in the reselection list of standard target sub-district, and this sub-district is set to not synchronous regime.
The satisfied gravity treatment standard target cell list attended operation of measuring under the reselection conditions in this mobile communication system in the method for mobile device realization fast cell re-selection may further comprise the steps:
(1171) judge that this does not satisfy the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(1172) if above-mentioned steps (113) not in this gravity treatment standard target cell list, is then returned in this sub-district;
(1173) if this sub-district has been present in this tabulation, whether the synchronizing process of then judging this sub-district well afoot;
(1174) if not, then this sub-district is directly deleted from gravity treatment standard target cell list;
(1174) if then allow synchronizing process to continue, and return above-mentioned steps (113).
Mobile device in this mobile communication system in the method for mobile device realization fast cell re-selection carries out the Synchronous Processing operation to the not synchronized cells that satisfies synchronization criterion, may further comprise the steps:
(121) check in the described gravity treatment standard target cell list whether have not synchronous sub-district;
(122) if there is no synchronized cells not, the operating process of then gravity treatment standard target cell list Synchronous Processing finishes, and returns above-mentioned steps (3);
(123), check then whether this sub-district satisfies the synchronizing process entry condition if there is not synchronized cells;
(124), then return above-mentioned steps (121) and carry out the inspection of next sub-district if do not satisfy;
(125), then carry out sub-district Synchronous Processing operation if satisfy.
The sub-district Synchronous Processing of carrying out in this mobile communication system in the method for mobile device realization fast cell re-selection is operated, and may further comprise the steps:
(1251) from the not synchronized cells of standard target sub-district, select the best sub-district of signal quality;
(1252) start public broadcasting (BCH) channel that monitors and insert the best sub-district of this signal quality;
(1253), then return above-mentioned steps (121) and carry out the inspection of next sub-district if configuration is unsuccessful;
(1254) if configuration successful then monitors the common broadcast channel of the sub-district that this signal quality is best, receive and memory channel on the system information broadcasted;
(1255) the best sub-district of this signal quality is set and is synchronous regime, and return above-mentioned steps (121) and carry out next sub-district and check.
Mobile device is realized carrying out the cell reselection process operation according to gravity treatment standard target cell list in the method for fast cell re-selection in this mobile communication system, may further comprise the steps:
(21) mobile device checks in the gravity treatment standard target cell list whether have the sub-district of satisfying reselection conditions;
(22) if there is no, then cell reselection process failure, and finish;
(23), then select the best sub-district of signal quality in the gravity treatment standard target cell list as the gravity treatment Target cell if exist;
(24) synchronizing process of checking current gravity treatment standard target cell list well afoot whether;
(25), judge then whether current synchronous sub-district is current selected gravity treatment Target cell if synchronizing process is underway; If not, then stop current synchronizing process; If, then continue current synchronizing process, and execution in step (29);
(26), judge that then whether described gravity treatment Target cell is synchronous regime if synchronizing process is not underway;
(27) if then directly carry out the sub-district reselection operation, and finish;
(28) if not, then carry out the sub-district synchronizing process;
(29) judge whether the sub-district synchronizing process is successful;
(210) if then carry out the sub-district reselection operation, and finish;
(211) if not, then return above-mentioned steps (21).
Mobile communication system in this mobile communication system in the method for mobile device realization fast cell re-selection can be WCDMA mobile communication system, CDMA2000 mobile communication system, TD-SCDMA mobile communication system or GSM/GPRS/EDGE mobile communication system.
Adopted mobile device in the mobile communication system of this invention to realize the method for fast cell re-selection, join in the tabulation of gravity treatment standard target owing to wherein will satisfy the gravity treatment measuring condition and be in the sub-district of reselection evaluation phase, by maintenance to this tabulation, learn each cell information in the residing network coverage of mobile device in advance, when needs carry out the sub-district gravity treatment, mobile device can be according to each cell information of knowing in advance, go after profits and advoid disadvantages, preferentially select the easy standard target sub-district of good, the follow-up signaling procedure of signal quality as the gravity treatment target; Simultaneously in reuse adoption process, owing to known the system information of Target cell in advance, so avoided in reuse adoption process, carrying out the process of the whole system informations of real time scan, quickened the whole process of sub-district gravity treatment, thereby guaranteed the optimization of the Target cell of sub-district gravity treatment as far as possible, implementation procedure is simple, can be more fast and carry out the sub-district gravity treatment targetedly, farthest avoided a large amount of Signalling exchange after the failure of sub-district gravity treatment and the gravity treatment, the reselection operation success rate is higher, stable and reliable working performance, the scope of application are comparatively extensive, for further developing of mobile communication technology established solid foundation.
Description of drawings
Fig. 1 is the overall flow figure that mobile device is realized the method for fast cell re-selection in the mobile communication system of the present invention.
Fig. 2 is that mobile device is realized gravity treatment standard target cell list control flow chart in the method for fast cell re-selection in the mobile communication system of the present invention.
Fig. 3 is that mobile device is realized gravity treatment standard target sub-district synchronizing process control flow chart in the method for fast cell re-selection in the mobile communication system of the present invention.
Fig. 4 is that mobile device is realized standard target sub-district gravity treatment control flow chart in the method for fast cell re-selection in the mobile communication system of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also Fig. 1 to shown in Figure 4, mobile device is realized the method for fast cell re-selection in this mobile communication system, and its main feature is that described method may further comprise the steps:
(1) mobile device carries out the cell selecting process after starting shooting successfully, finds Serving cell and is stationed and network registry, and produce adjacent subdistrict frequency point tabulation according to the system information of Web broadcast;
(2) mobile device carries out the maintenance of gravity treatment standard target cell list, may further comprise the steps:
(a) mobile device carries out the generation processing of gravity treatment standard target cell list, may further comprise the steps:
(i) mobile device monitors Serving cell and the adjacent sub-district in its area of coverage and carries out signal quality measured;
(ii) mobile device obtains corresponding measurement result and this measurement result is sorted;
(iii) judge whether to exist effective measurement result; If there is no, then finish and return above-mentioned steps (1);
If (iv) exist, then select the best sub-district of signal quality in the measurement result;
(judge v) whether the best sub-district of this signal quality satisfies the measurement reselection conditions;
If (vi) satisfy, then satisfy the gravity treatment standard target cell list attended operation of measuring under the reselection conditions, may further comprise the steps:
(I) judge that this satisfies the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(II) if this sub-district has been present in the gravity treatment standard target cell list, then return above-mentioned steps (iii);
(III) if this sub-district not in gravity treatment standard target cell list, then this sub-district is added in the reselection list of standard target sub-district, and this sub-district is set to not synchronous regime;
If (vii) do not satisfy, then carry out not satisfying the gravity treatment standard target cell list attended operation of measuring under the reselection conditions, may further comprise the steps:
(I) judge that this does not satisfy the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(II) if above-mentioned steps not in this gravity treatment standard target cell list, is then returned (iii) in this sub-district;
(III) if this sub-district has been present in this tabulation, whether the synchronizing process of then judging this sub-district well afoot;
(IX) if not, then this sub-district is directly deleted from gravity treatment standard target cell list;
(X) if then allow synchronizing process to continue, and return above-mentioned steps (iii);
(b) mobile device carries out the Synchronous Processing operation to the not synchronized cells that satisfies synchronization criterion, may further comprise the steps:
(i) check in the described gravity treatment standard target cell list whether have not synchronous sub-district;
(ii) if there is no synchronized cells not, the operating process of then gravity treatment standard target cell list Synchronous Processing finishes, and returns above-mentioned steps (3);
If (iii) there is not synchronized cells, check then whether this sub-district satisfies the synchronizing process entry condition;
If (iv) do not satisfy, then return above-mentioned steps (i) and carry out the inspection of next sub-district;
If (v) satisfy, then carry out sub-district Synchronous Processing operation, may further comprise the steps:
(I) from the not synchronized cells of standard target sub-district, select the best sub-district of signal quality;
(II) start public broadcasting (BCH) channel that monitors and insert the best sub-district of this signal quality;
(III), then return above-mentioned steps (i) and carry out the inspection of next sub-district if configuration is unsuccessful;
(IX) if configuration successful then monitors public broadcasting (BCH) channel of the sub-district that this signal quality is best, receive and memory channel on the system information broadcasted;
(X) the best sub-district of this signal quality is set and is synchronous regime, and return above-mentioned steps (i) and carry out next sub-district and check;
(3) when mobile device need carry out the sub-district gravity treatment, carry out the cell reselection process operation according to described gravity treatment standard target cell list, may further comprise the steps:
(a) mobile device checks in the gravity treatment standard target cell list whether have the sub-district of satisfying reselection conditions;
(b) if there is no, then cell reselection process failure, and finish;
(c), then select the best sub-district of signal quality in the gravity treatment standard target cell list as the gravity treatment Target cell if exist;
(d) synchronizing process of checking current gravity treatment standard target cell list well afoot whether;
(e), judge then whether current synchronous sub-district is current selected gravity treatment Target cell if synchronizing process is underway; If not, then stop current synchronizing process; If, then continue current synchronizing process, and execution in step (j);
(f), judge that then whether described gravity treatment Target cell is synchronous regime if synchronizing process is not underway;
(g) if then directly carry out the sub-district reselection operation, and finish;
(h) if not, then carry out the sub-district synchronizing process;
(j) judge whether the sub-district synchronizing process is successful;
(k) if then carry out the sub-district reselection operation, and finish;
(l) if not, then return above-mentioned steps (a).
Simultaneously, the mobile communication system among the present invention can be WCDMA mobile communication system, CDMA2000 mobile communication system, TD-SCDMA mobile communication system or GSM/GPRS/EDGE mobile communication system.
In the middle of reality was used, in order to realize above-mentioned purpose, the method for fast cell re-selection in the mobile communication system of the present invention may further comprise the steps:
(1) the mobile device cell selecting of starting shooting;
(2) when finish that the sub-district is stationed and network registry after carry out gravity treatment standard target cell list and safeguard that this process will be described in detail follow-up;
(3) when mobile device need carry out the sub-district gravity treatment, carry out the gravity treatment of standard target cell list.
Wherein in this mobile communication system in the method for fast cell re-selection the maintenance process of gravity treatment standard target cell list be specially:
The maintenance of gravity treatment standard target cell list mainly comprises two parts, the one, the generation of gravity treatment standard target cell list, the 2nd, to the not synchronized cells that satisfies synchronization criterion synchronously.
The generative process of gravity treatment standard target cell list specifically may further comprise the steps:
(21) mobile device monitors Serving cell and the adjacent sub-district in its area of coverage, obtains its measurement result;
(22) measurement result is sorted, select the best sub-district of measurement index;
(23) judge that whether this index best cell satisfies the measurement reselection conditions, that is to say that this sub-district is in the reselection evaluation phase; If satisfy, need then to judge whether this sub-district has been present in the gravity treatment standard target cell list; If in tabulation, then the maintenance to this sub-district finishes in this sub-district; If then dose this sub-district in the reselection list of standard target sub-district not in the reselection list of standard target sub-district this sub-district, and be set to not synchronous regime.
(24) do not measure reselection conditions if best cell does not satisfy, judge further then whether this sub-district has been present in the gravity treatment standard target cell list;
(25) if be present in this tabulation, whether the synchronizing process of then judging this sub-district well afoot, if not, then this sub-district is deleted from gravity treatment standard target cell list; If the synchronizing process well afoot of this sub-district then allows synchronizing process to continue;
(26) if the adjacent sub-district that has not satisfied condition in the step (22), then the generation maintenance process of this gravity treatment standard target cell list finishes, and returns.
The synchronizing process of the not synchronized cells that satisfies synchronization criterion of gravity treatment standard target cell list specifically may further comprise the steps:
(27) check whether gravity treatment standard target cell list exists not synchronous sub-district; If no, then gravity treatment standard target cell list synchronization detection process finishes, and returns.
(28) if there is not synchronized cells, check whether this sub-district satisfies the synchronizing process entry condition, if do not satisfy, then return step (27) and carry out next cell detection; If satisfy the synchronizing process entry condition, execution in step (29) then
(29) startup monitors the not BCH channel of synchronized cells, if supervision is unsuccessful, then returns step (27) and carries out next detection.If the success execution in step (30)
(30) monitor the not BCH channel of synchronized cells, the system information of broadcasting on reception and the memory channel.
(31) this sub-district is set and is synchronous regime.
In this mobile communication system in the method for fast cell re-selection the standard target cell reselection process be specially:
(40) mobile device detects and need carry out the sub-district gravity treatment;
(41) check in the gravity treatment standard target cell list whether have the sub-district of satisfying reselection conditions, if do not have, then cell reselection process failure is returned.If have, execution in step (42) then;
(42) best cell that satisfies condition in the selection gravity treatment standard target cell list is as the gravity treatment Target cell.Whether the synchronizing process of checking current gravity treatment standard target cell list well afoot, if, and synchronized cells is not the gravity treatment Target cell, then synchronizing process stopped; If synchronized cells is consistent with the gravity treatment Target cell, then proceed synchronizing process;
(43), judge that then whether the gravity treatment Target cell is synchronous regime if synchronizing process is not underway;
(44) if, then directly carry out the sub-district gravity treatment, successfully return;
(45) if the gravity treatment Target cell is a synchronous regime not, then begin to carry out synchronizing process;
(46) check whether synchronizing process is successful, if, then start the sub-district gravity treatment, successfully return.If the failure of the synchronizing process of gravity treatment Target cell then turns back to step (41), attempt finding new gravity treatment Target cell.
In order more to be expressly understood technology contents of the present invention, see also Fig. 1 to shown in Figure 4:
Wherein Fig. 1 is the overall flow figure of fast cell re-selection:
S100---start;
S101---start shooting successfully after, UE will carry out the cell selecting process, find Serving cell and be stationed, the read system information data block produces adjacent subdistrict frequency point tabulation;
S102---UE carries out measuring process, and produces the candidate cell tabulation of sub-district gravity treatment according to measurement result, and safeguards, produces the standard target sub-district;
S103---synchronizing process is carried out in the sub-district that aims at the mark, and finishes the sub-district gravity treatment;
See also shown in Figure 2ly again, it is the gravity treatment standard target cell list control flow chart in the method for fast cell re-selection:
S200---the control procedure of beginning gravity treatment standard target cell list;
S201---UE measures Serving cell and adjacent sub-district;
S202---obtain measurement result and sort according to the quality index in the measurement result;
S203---judge whether to exist measurement result, if exist, then select to measure top-quality sub-district and execution in step S204, if there is no, execution in step S210 then finishes this tabulation maintenance process and returns;
S204---judge whether top-quality sub-district satisfies and measure reselection conditions, if satisfy, execution in step S208 then, otherwise, execution in step S205 then;
S205---this is measured top-quality sub-district and does not satisfy the measurement reselection conditions, judges then whether this sub-district is present in the standard target cell list; If exist, execution in step S206 then, otherwise, return execution in step S203;
S206---judge whether this sub-district is carrying out synchronizing process; If carrying out then returning execution in step S203 synchronously, otherwise, execution in step S207;
S207---this sub-district is deleted from the standard target cell list, and return execution in step S203;
If S208---top-quality sub-district is present in the standard target cell list, then returns execution in step S203, on the contrary execution in step S209;
S209---this sub-district is not present in the standard target cell list, then this cell update is entered in the standard target cell list;
S210---finish this tabulation maintenance process and returning.
See also shown in Figure 3ly again, it is the gravity treatment standard target sub-district synchronizing process control flow chart in the method for fast cell re-selection:
S300---beginning gravity treatment standard target sub-district synchronizing process;
S301---judge whether there is not synchronous sub-district in the standard target sub-district, if exist, execution in step S302 then, otherwise execution in step S308 finish synchronizing process and return;
S302---judge that whether this sub-district satisfy the standard that starts synchronizing process, if satisfy, execution in step S303 then, otherwise return execution in step S301;
S303---from the not synchronized cells of standard target sub-district, select the best sub-district of signal quality, and execution in step S304;
S304---to this cell configuration BCH channel, and execution in step S305;
S305---judge whether configuration successful of BCH channel, if success, execution in step S306 then, otherwise return execution in step S301;
S306---receive and storage SIB, and execution in step S307;
S307---it is synchronous regime that this sub-district is set, and returns execution in step S301;
S308---synchronizing process is finished, and returns;
See also shown in Figure 4ly again, it is the standard target sub-district gravity treatment control flow chart in the method for fast cell re-selection:
S400---UE monitors and need carry out the sub-district gravity treatment, and execution in step S401;
S401---judge whether there is the sub-district of satisfying gravity treatment in the standard target cell list, if exist, execution in step S402 then, otherwise reuse adoption process finishes also to return;
S402---selecting the top-quality sub-district of standard target sub-district is Target cell, and execution in step S403;
S403---judge whether the sub-district of synchronizing process and Target cell carry out, if synchronizing process is carried out, then execution in step S404 finishes execution in step S407 otherwise carry out synchronizing process;
S404---judge whether the sub-district of carrying out synchronizing process is Target cell, if then execution in step S406 continues to carry out synchronizing process, if not, then execution in step S405 abandons synchronizing process;
S405---finish synchronizing process;
S406---continue to carry out synchronizing process, then execution in step S409;
S407---judge whether the gravity treatment Target cell is finished synchronously, if finish, then execution in step S410 carries out the sub-district gravity treatment, if do not finish, execution in step S408 then;
S408---beginning synchronizing process;
S409---judge synchronously whether success, if success, execution in step S410 then, that denys returns execution in step S401;
S410---carry out cell reselection process.
In the time of in method of the present invention being applied to the second third-generation mobile communication system such as GSM/GPRS/EDGE, then can be after the cell selecting process to be finished, message such as resolution system information type 2 or 2bis generate adjacent cell list according to its adjacent cell carrier that comprises.Again Serving cell and adjacent cell list are measured, it mainly is signal level (RSSI) value that obtains each carrier frequency point, according to the RSSI value all cell measurement results are sorted, detect current whether the existence and satisfy the sub-district that enters gravity treatment standard target cell list, this standard considers mainly whether the comparing difference of RSSI value has reached the requirement of gravity treatment.Synchronizing process of the present invention mainly is divided into two purposes in gsm system, and the one, the BSIC of acquisition sub-district, and the synchronization time difference of mobile device between base station (BSS); The 2nd, obtain the part system information of this sub-district, comprised basic description in this information to this sub-district, such as residing lane place, be access in such as current area and forbid etc.
In the time of in method of the present invention being applied to 3G (Third Generation) Moblie systems such as WCDMA/CDMA2000/TD-SCDMA, the generation of adjacent cell list then is mainly derived from system information type 11, the measurement of Serving cell and adjacent cell list is then mainly paid close attention to the RSCP value and the ECN0 value of sub-district, according to these two measured values, whether decision carries out the preliminary maintenance of gravity treatment standard target cell list.And in the WCDMA system, counterweight is made an accurate selection of the synchronizing process of Target cell and is then mainly paid close attention to two purposes, the one, and the main scrambler of Target cell and the time offset value of mobile device and base station; The 2nd, the part broadcast message of Target cell, such as main information data block, system information type 3 etc., more complicated signaling procedure of needs etc. whether after understanding this sub-district and whether being fit to be stationed and be stationed.
In sum, although the communication system that the present invention uses is variant, but finished the synchronizing process of gravity treatment standard target sub-district when mobile device after, mobile device will be than more comprehensive understanding Target cell, that is to say, mobile device is enough good at signal, do not need just to have understood very much before carrying out the sub-district gravity treatment situation of other sub-district in its current coverage range, if current area need be carried out gravity treatment, then can be according to the situation of the adjacent sub-district of prior grasp, selectively determine the gravity treatment Target cell, make that the sub-district gravity treatment is targeted, efficiently convenient.Simultaneously, owing to there is the basic thresholding of gravity treatment standard target cell maintenance, this just can guarantee that mobile device can not carry out undying measurement, gravity treatment standard target cell maintenance process such as synchronous under idle condition, reduced the mobile device unnecessary power loss.
The method of fast cell re-selection can join in the tabulation of gravity treatment standard target satisfying the gravity treatment measuring condition and being in the sub-district of reselection evaluation phase in the mobile communication system of the present invention, by maintenance, learn each cell information in the residing network coverage of mobile device in advance to this tabulation.When needs carried out the sub-district gravity treatment, mobile device can be gone after profits and advoided disadvantages according to each cell information of knowing in advance, preferentially selects signal quality good, and the easy standard target sub-district of follow-up signaling procedure is as the gravity treatment target.Such as can preferentially selecting change in signal strength sub-district stably, also can preferentially select sub-district that belongs to current service cell a RNC etc.In reuse adoption process,,, quickened the whole process of sub-district gravity treatment simultaneously admittedly avoided in reuse adoption process, carrying out the process of the whole system informations of real time scan owing to known the system information of Target cell in advance.
Adopted the method for mobile device realization fast cell re-selection in the above-mentioned mobile communication system, join in the tabulation of gravity treatment standard target owing to wherein will satisfy the gravity treatment measuring condition and be in the sub-district of reselection evaluation phase, by maintenance to this tabulation, learn each cell information in the residing network coverage of mobile device in advance, when needs carry out the sub-district gravity treatment, mobile device can be according to each cell information of knowing in advance, go after profits and advoid disadvantages, preferentially select the easy standard target sub-district of good, the follow-up signaling procedure of signal quality as the gravity treatment target; Simultaneously in reuse adoption process, owing to known the system information of Target cell in advance, so avoided in reuse adoption process, carrying out the process of the whole system informations of real time scan, quickened the whole process of sub-district gravity treatment, thereby guaranteed the optimization of the Target cell of sub-district gravity treatment as far as possible, implementation procedure is simple, can be more fast and carry out the sub-district gravity treatment targetedly, farthest avoided a large amount of Signalling exchange after the failure of sub-district gravity treatment and the gravity treatment, the reselection operation success rate is higher, stable and reliable working performance, the scope of application are comparatively extensive, for further developing of mobile communication technology established solid foundation.
In this specification, the present invention is described with reference to embodiment.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (9)
1. mobile device is realized the method for fast cell re-selection it is characterized in that described method may further comprise the steps in the mobile communication system:
(1) mobile device carries out the cell selecting process after starting shooting successfully, finds Serving cell and is stationed and network registry, and produce adjacent subdistrict frequency point tabulation according to the system information of Web broadcast;
(2) mobile device carries out the maintenance of gravity treatment standard target cell list;
(3) when mobile device need carry out the sub-district gravity treatment, carry out the cell reselection process operation according to described gravity treatment standard target cell list.
2. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 1, it is characterized in that, the described gravity treatment standard target cell list that carries out is safeguarded, may further comprise the steps:
(11) mobile device carries out the generation processing of gravity treatment standard target cell list;
(12) mobile device carries out the Synchronous Processing operation to the not synchronized cells that satisfies synchronization criterion.
3. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 2, it is characterized in that, described mobile device carries out the generation of gravity treatment standard target cell list to be handled, and may further comprise the steps:
(111) mobile device monitors Serving cell and the adjacent sub-district in its area of coverage and carries out signal quality measured;
(112) mobile device obtains corresponding measurement result and this measurement result is sorted;
(113) judge whether to exist effective measurement result; If there is no, then finish and return above-mentioned steps (1);
(114) if exist, then select the best sub-district of signal quality in the measurement result;
(115) judge whether the best sub-district of this signal quality satisfies the measurement reselection conditions;
(116) if satisfy, then satisfy the gravity treatment standard target cell list attended operation of measuring under the reselection conditions;
(117), then carry out not satisfying the gravity treatment standard target cell list attended operation of measuring under the reselection conditions if do not satisfy.
4. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 3, it is characterized in that the gravity treatment standard target cell list attended operation under the described satisfied measurement reselection conditions may further comprise the steps:
(1161) judge that this satisfies the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(1162) if this sub-district has been present in the gravity treatment standard target cell list, then return above-mentioned steps (113);
(1163) if this sub-district not in gravity treatment standard target cell list, then this sub-district is added in the reselection list of standard target sub-district, and this sub-district is set to not synchronous regime.
5. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 3, it is characterized in that, the described gravity treatment standard target cell list attended operation that does not satisfy under the measurement reselection conditions may further comprise the steps:
(1171) judge that this does not satisfy the sub-district of measuring reselection conditions and whether has been present in the gravity treatment standard target cell list;
(1172) if above-mentioned steps (113) not in this gravity treatment standard target cell list, is then returned in this sub-district;
(1173) if this sub-district has been present in this tabulation, whether the synchronizing process of then judging this sub-district well afoot;
(1174) if not, then this sub-district is directly deleted from gravity treatment standard target cell list;
(1174) if then allow synchronizing process to continue, and return above-mentioned steps (113).
6. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 2, it is characterized in that, described mobile device carries out the Synchronous Processing operation to the not synchronized cells that satisfies synchronization criterion, may further comprise the steps:
(121) check in the described gravity treatment standard target cell list whether have not synchronous sub-district;
(122) if there is no synchronized cells not, the operating process of then gravity treatment standard target cell list Synchronous Processing finishes, and returns above-mentioned steps (3);
(123), check then whether this sub-district satisfies the synchronizing process entry condition if there is not synchronized cells;
(124), then return above-mentioned steps (121) and carry out the inspection of next sub-district if do not satisfy;
(125), then carry out sub-district Synchronous Processing operation if satisfy.
7. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 6, it is characterized in that, the described sub-district Synchronous Processing of carrying out is operated, and may further comprise the steps:
(1251) from the not synchronized cells of standard target sub-district, select the best sub-district of signal quality;
(1252) start the common broadcast channel that monitors and insert the best sub-district of this signal quality;
(1253), then return above-mentioned steps (121) and carry out the inspection of next sub-district if configuration is unsuccessful;
(1254) if configuration successful then monitors the common broadcast channel of the sub-district that this signal quality is best, receive and memory channel on the system information broadcasted;
(1255) the best sub-district of this signal quality is set and is synchronous regime, and return above-mentioned steps (121) and carry out next sub-district and check.
8. mobile device is realized the method for fast cell re-selection in the mobile communication system according to claim 1, it is characterized in that, describedly carries out the cell reselection process operation according to gravity treatment standard target cell list, may further comprise the steps:
(21) mobile device checks in the gravity treatment standard target cell list whether have the sub-district of satisfying reselection conditions;
(22) if there is no, then cell reselection process failure, and finish;
(23), then select the best sub-district of signal quality in the gravity treatment standard target cell list as the gravity treatment Target cell if exist;
(24) synchronizing process of checking current gravity treatment standard target cell list well afoot whether;
(25), judge then whether current synchronous sub-district is current selected gravity treatment Target cell if synchronizing process is underway; If not, then stop current synchronizing process; If, then continue current synchronizing process, and execution in step (29);
(26), judge that then whether described gravity treatment Target cell is synchronous regime if synchronizing process is not underway;
(27) if then directly carry out the sub-district reselection operation, and finish;
(28) if not, then carry out the sub-district synchronizing process;
(29) judge whether the sub-district synchronizing process is successful;
(210) if then carry out the sub-district reselection operation, and finish;
(211) if not, then return above-mentioned steps (21).
9. realize the method for fast cell re-selection according to mobile device in each described mobile communication system in the claim 1 to 8, it is characterized in that described mobile communication system is WCDMA mobile communication system, CDMA2000 mobile communication system, TD-SCDMA mobile communication system or GSM/GPRS/EDGE mobile communication system.
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