CN101547484B - Method for realizing cell re-selection by mobile device in mobile communication system - Google Patents
Method for realizing cell re-selection by mobile device in mobile communication system Download PDFInfo
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Abstract
The invention relates to a method for realizing cell re-selection by a mobile device in a mobile communication system, which comprises the steps that: the mobile device performs the cell selection process and records a measurement result, performs the processing operation of generating a cell re-selection measurement target list according to the measurement result, performs the detection operation of the cell re-selection according to the cell re-selection measurement target list and acquires re-selected target cells which satisfy cell re-selection conditions, and performs the cell re-selection process according to the re-selected target cells. The adoption of the method for realizing the cell re-selection by the mobile device in the mobile communication system effectively realizes the operation of cell selection, also has higher success ratio, remarkably reduces the power consumption of the system under DRX state at the same time, solves the problem of frequent cell re-selection caused by level fluctuation, saves operating cost, improves wireless communication service quality and operation efficiency, saves the energy and reduces the consumption, has steady and reliable working performance and broader application range, and lays a solid foundation for the further development of modern mobile communication technology.
Description
Technical field
The present invention relates to wireless communication field, particularly mobile device cell selecting technical field in the wireless communication system is meant that specifically mobile device is realized method of cell reselection in a kind of mobile communication system.
Background technology
In wireless mobile communications GSM (digital cellular mobile communication systems) system of operation at present, network carries out omnibearing covering with honeycomb style, after mobile device selects certain sub-district to be current service cell, change under the little situation in various conditions, mobile device will reside in the selected sub-district, finish the cell selecting process.After this, mobile device will continue the network coverage of monitoring in the current environment, comprise Serving cell that mobile device is stationed and some adjacent sub-districts around it.In gsm system, Serving cell can be by the various types of system informations of broadcasting of its BCCH (Broadcast Control Channel) channel cycle, wherein just comprised the needed adjacent subdistrict frequency point allocation list of sub-district gravity treatment, mobile device will be monitored the bcch carrier that is present in the subdistrict frequency point allocation list.
Mobile device need be measured the bcch carrier of adjacent sub-district, measurement to their incoming levels needs 5 measurement sampling points to average at least, and tackle all bcch carriers and get same sampling point number, and the sampling point of distributing to each carrier wave each measuring period the planted agent average as far as possible, in per minute, upgrade 6 the strongest carrier waves at least.Simultaneously mobile device also comprises the task of measuring present Serving cell bcch carrier in the routine measurement program, requires at least the whole system messages that the BCCH of Serving cell broadcasts of attempting to decode 30 seconds planted agents; At least the bcch carrier to 6 adjacent sub-districts the strongest carries out the decoding of BCCH all data blocks in 5 minutes, and this data sub-district comprises the parameter that influences the sub-district gravity treatment.constantly measure and decode procedure in, if mobile device recognizes a new BCCH carrier frequency when having become one of 6 carrier frequency that level is the strongest, these BCCH carrier frequency data should can decode in 30s.At least all attempting to detect the BSIC (BCC) of the strongest non-service cell BCCH carrier frequency of 6 level every 30 seconds mobile phones, is same sub-district with what confirm that it is monitored.If BSIC changes, this carrier frequency will be regarded as new carrier frequency, thereby read the BCCH data again.In above situation, MS does not interrupt intercepting PCH (Paging Control Channel) as far as possible.If when the process that monitors adjacent sub-district finds to satisfy the sub-district reselection conditions, mobile device will be initiated reuse adoption process.
The path loss criterion of parameters C 1 for being stationed for the sub-district, the C1 of Serving cell must be greater than 0, and its formula is as follows:
C1＝RXLEV-RXLEV_ACCESS_MIN-MAX((MS_TXPWR_MAX_CCH-P)，0)
Unit: dBm
Wherein:
● RXLEV is the average level that travelling carriage receives
● the minimum incoming level of RXLEV_ACCESS_MIN for allowing travelling carriage to insert
● spendable maximum transmit power level when MS_TXPWR_MAX_CCH is the travelling carriage connecting system
● P is the peak power output of travelling carriage
If do not find proper cell yet after 30 radio-frequency channels the strongest are all searched, then mobile device will continue all RF channels of monitoring, search C1 is greater than 0 and the Broadcast Control Channel (BCCH) that is not under an embargo and inserts, after finding this carrier wave, mobile device will be stationed this sub-district, and do not consider public mobile communication net (PLMN) information, this moment, mobile device was only supported urgent call.
Simultaneously, the algorithm that the sub-district gravity treatment is adopted is the C2 algorithm, and computing formula is as follows:
When PT is not equal to 11111:
C2＝C1+CRO-TO×H(PT-T)
When PT equals 11111:
C2＝C1-CRO
Wherein,
PT:PENALTY TIME is a Penalty time;
CRO:CELL RESELECT OFFSET is the cell reselection offset amount;
TO:TEMPORARY OFFSET is interim side-play amount;
Wherein when X＞0, function H (x)=0; As X≤O, function H (x)=1;
T is a timer, its initial value is 0, when certain sub-district is moved platform and is recorded in six adjacent sub-districts of signal level maximum, then counter T that should the sub-district is picked up counting, when removed from six adjacent sub-district tables of mobile station signal level maximum this sub-district, corresponding timer T was reset; Find the signal appearance of a certain sub-district from mobile device after, the value that timer T begins to be set to timer T will be given the correction of a negative bias of C2 algorithm of this sub-district according to the defined value of TEMPORARY OFFSET before arriving PENALTY TIME official hour, and this way is to be used for preventing selecting a microcellulor or covering the situation of less sub-district as Serving cell during in fast moving when travelling carriage.If surpass the signal of still receiving this sub-district in the time; Otherwise,, will not consider interim side-play amount if the time has surpassed PENALTY TIME after the defined time.Here it should be noted that, only this Several Parameters of C2 algorithm just works when sub-district gravity treatment indication (CELL RESELECTION INDICATION) activates, otherwise travelling carriage will not considered the situation that is provided with of CELL_RESELECT OFFSET, TEMPORARY OFFSET and PENALTYTIME, thus this moment C2=C1.
When following situation takes place, with triggering cell gravity treatment (if the un-activation still of C2 algorithm, then C2=C1):
1) travelling carriage calculates the C2 value continuous 5s of the C2 value of certain sub-district (belonging to the same position district with current area) above the travelling carriage current service cell.
2) travelling carriage calculates C2 value and sub-district gravity treatment lagged value (CELL SELECTION HYSTERESIS) the sum continuous 5s of the C1 value of certain sub-district (not belonging to same lane place with current area) above the travelling carriage current service cell.If in 15s before this, the sub-district gravity treatment is arranged then the sub-district gravity treatment does not take place immediately.
3) current service cell is under an embargo
4) travelling carriage is monitored out downlink failure.
The downlink signaling fault criteria is based on downlink signaling failure counter DSC, when mobile station in selecting during certain sub-district, DSC is changed to [90/BS_PA_MFRMS] and rounds, BS_PA_MFRMS gives 51TDMA frame multi-frame number between the same paging group MS for the base station transmits paging information.Therefore when travelling carriage will be deciphered on its paging subchannel, if success then DSC adds 1, if failure, DSC subtracted 4, when DSC is 0, then concludes the downlink signaling fault to have occurred.
5) the continuous 5s of C1 value of Serving cell is less than 0.
When 6) mobile phone inserts at random, under the still unsuccessful situation of access attempts after the maximum retransmit.
Under the situation that the sub-district reselection conditions satisfies, mobile device should carry out the BCCH all data blocks decodes to the Target cell of gravity treatment, and when condition satisfied, mobile device just carried out gravity treatment.
Can imagine, if according to present traditional operation, to be in level fluctuation frequent if mobile device is current, when disturbing bigger environment, the Serving cell level fluctuation is bigger, and the adjacent sub-district that is present among the TOP6 must constantly be adjusted, such as the monitored cells number of variations among the TOP6, the sub-district ordering changes or the like, and the thing followed is that operations such as measuring operation, the simultaneous operation to the sub-district that changes and the BCCH channel data piece of decoding then can increase greatly so.
In sum, adopt traditional residence reselecting to the power consumption of mobile device, to assess the cost all be great consumption, also will inevitably increase considerably the use cost of mobile device simultaneously.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of and can carry out more effectively that cell selecting operation, success rate are higher, energy-saving and cost-reducing, stable and reliable working performance, scope of application mobile device realization method of cell reselection in the mobile communication system comparatively widely.
In order to realize above-mentioned purpose, mobile device realizes that method of cell reselection is as follows in the mobile communication system of the present invention:
Mobile device is realized method of cell reselection in this mobile communication system, and its main feature is that described method may further comprise the steps:
(1) mobile device carries out the opening initialization operation, and obtains the information in the storage inside module;
(2) carry out cell selecting process and write down measurement result;
(3) generate the processing operation that gravity treatment measurement target in sub-district is tabulated according to described measurement result;
(4) carry out sub-district gravity treatment detecting operation according to described sub-district gravity treatment measurement target tabulation, and the gravity treatment Target cell that satisfies the sub-district reselection conditions that obtains;
(5) according to described gravity treatment Target cell, carry out follow-up cell reselection process.
Mobile device is realized the cell selecting process of carrying out in the method for cell reselection and is write down measurement result in this mobile communication system, is specially:
Carry out the cell selecting process according to cell selecting algorithm default in the system of mobile device, and write down the full range band measurement result in this cell selecting process.
Mobile device is realized the processing operation that generates the tabulation of sub-district gravity treatment measurement target in the method for cell reselection in this mobile communication system, may further comprise the steps:
(11) generate the processing operation that basic sub-district gravity treatment measurement target is tabulated according to described full range band measurement result;
(12) processing that generates the tabulation of sub-district gravity treatment measurement target according to described basic sub-district gravity treatment measurement target tabulation is operated.
Mobile device is realized generating the processing operation of basic sub-district gravity treatment measurement target tabulation according to full range band measurement result in the method for cell reselection in this mobile communication system, may further comprise the steps:
System information when (111) mobile device is analyzed the cell selecting success, and the neighbor cell list that obtains wherein to be comprised;
(112) measure level value according to the frequency of each sub-district in the described full range band measurement result, determine the measurement priority of each sub-district in the described neighbor cell list;
(113) the highest frequency of described neighbor cell list medium priority is joined in the basic sub-district gravity treatment measurement target tabulation;
(114) whether system's capacity of detecting current described basic sub-district gravity treatment measurement target tabulation has reached the basic sub-district reselection list capacity threshold of systemic presupposition;
(115) if not, then return above-mentioned steps (113); If then basic sub-district gravity treatment measurement target tabulation generates successfully.
Mobile device is realized the processing operation that generates the tabulation of sub-district gravity treatment measurement target in the method for cell reselection in this mobile communication system, may further comprise the steps:
(121) each frequency in the described basic sub-district gravity treatment measurement target tabulation is measured, obtained the level value of each frequency;
(122) level value according to each frequency sorts to each sub-district in this basic sub-district gravity treatment measurement target tabulation, and determines the assessment priority of each sub-district in this basic sub-district gravity treatment measurement target tabulation;
(123) according to this each sub-district in this basic sub-district gravity treatment measurement target tabulation is assessed according to described assessment priority, detected this sub-district and whether meet the condition that is present in the tabulation of sub-district gravity treatment measurement target;
(124) if not, then with the deletion from described basic sub-district gravity treatment measurement target tabulation of this sub-district, and execution in step (126); If, then this sub-district is added in the tabulation of sub-district gravity treatment measurement target, and execution in step (125);
(125) whether the capacity of the described sub-district gravity treatment measurement target tabulation of detection is higher than the sub-district reselection list capacity threshold of systemic presupposition; If then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns; If not, execution in step (126) then;
(126) detect whether also to exist in the tabulation of this sub-district gravity treatment measurement target and do not have evaluated sub-district;
(127) if then return above-mentioned steps (122);
(128) if not, whether the capacity that then detects the tabulation of described sub-district gravity treatment measurement target is lower than the sub-district reselection list capacity threshold of systemic presupposition;
(129) if not, then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns;
(130) if then the processing that mobile device remeasures and additional sub-district gravity treatment measurement target is tabulated is operated.
Mobile device realizes that whether the detected cells in the method for cell reselection meets the condition that is present in the tabulation of sub-district gravity treatment measurement target, may further comprise the steps in this mobile communication system:
(21) judge the whether success synchronously of described sub-district, if synchronous success, then execution in step (22); Otherwise execution in step (26);
(22) judge whether success of decoding on the Broadcast Control Channel of described sub-district, if success, then execution in step (23); Otherwise execution in step (28);
(23) according to the measurement level value calculating path loss C1 of described sub-district;
(24) whether the path loss C1 that judges described sub-district is greater than 0, if then the loss fail counter is subtracted 1; Otherwise, the loss fail counter is added 4;
(25) judge that whether current loss failure calculator reaches the loss failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
(26) the synchronization failure counter is added 1;
(27) judge whether the synchronization failure counter has reached the synchronization failure threshold value of systemic presupposition,, then return the sub-district and do not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target if reach; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
(28) fail counter of will decoding adds 1;
(29) judge that whether the decoding fail counter has reached the decoding failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target.
Mobile device is realized remeasuring and the processing operation of additional sub-district gravity treatment measurement target tabulation in the method for cell reselection in this mobile communication system, may further comprise the steps:
Select the frequency in the non-basic sub-district gravity treatment measurement target tabulation system information when (31) mobile device is from the cell selecting success;
(32) this frequency is measured, obtained the level value of corresponding frequency;
(33) regenerate basic sub-district gravity treatment measurement target tabulation according to the pairing sub-district of each frequency, and sorted in the sub-district, and determine the assessment priority of each sub-district according to the level value of corresponding frequency;
(34) repeat above-mentioned steps (123).
Adopted in the mobile communication system of this invention mobile device to realize method of cell reselection, because its system information according to full range band measurement result and when analyzing the cell selecting success generates the tabulation of sub-district gravity treatment measurement target, make mobile device fix the number of the neighbor cell that need monitor basically, greatly reduced the fluctuation that changes the neighbor cell ordering that causes because of the measurement level, and then reduced being monitored the measurement of neighbor cell, synchronously with the operation of obtaining whole system informations, not only effectively realized the cell selecting operation, and success rate is higher, significantly reduced simultaneously the power consumption under the DRX state of system, more avoided because the problem of the frequent gravity treatment in sub-district that level fluctuation caused, saved operation cost, radio communication service quality and efficiency of operation have been improved, energy-saving and cost-reducing, stable and reliable working performance, the scope of application is comparatively extensive, for further developing of present mobile communication technology established solid foundation.
Description of drawings
Fig. 1 is the overall flow figure that mobile device is realized method of cell reselection in the mobile communication system of the present invention.
Fig. 2 is the process chart that mobile device is realized the basic sub-district gravity treatment of the generation measurement target tabulation in the method for cell reselection in the mobile communication system of the present invention.
Fig. 3 is the process chart that mobile device is realized the generation sub-district gravity treatment measurement target tabulation in the method for cell reselection in the mobile communication system of the present invention.
Fig. 4 realizes for mobile device in the mobile communication system of the present invention whether the detected cells in the method for cell reselection meets the flow chart that is present in the condition in the tabulation of sub-district gravity treatment measurement target.
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 method of cell reselection in this mobile communication system, may further comprise the steps:
(1) mobile device carries out the opening initialization operation, and obtains the information in the storage inside module;
(2) carry out cell selecting process and write down measurement result, be specially:
Carry out the cell selecting process according to cell selecting algorithm default in the system of mobile device, and write down the full range band measurement result in this cell selecting process;
(3) generate the processing operation that gravity treatment measurement target in sub-district is tabulated according to described measurement result, may further comprise the steps:
(a) generate the processing operation that basic sub-district gravity treatment measurement target is tabulated according to described full range band measurement result, may further comprise the steps:
System information when (i) mobile device is analyzed the cell selecting success, and the neighbor cell list that obtains wherein to be comprised;
(ii) measure level value, determine the measurement priority of each sub-district in the described neighbor cell list according to the frequency of each sub-district in the described full range band measurement result;
(iii) the highest frequency of described neighbor cell list medium priority is joined in the basic sub-district gravity treatment measurement target tabulation;
(iv) whether system's capacity of detecting current described basic sub-district gravity treatment measurement target tabulation has reached the basic sub-district reselection list capacity threshold of systemic presupposition;
(v) if not, then return above-mentioned steps (iii); If then basic sub-district gravity treatment measurement target tabulation generates successfully;
(b) processing that generates the tabulation of sub-district gravity treatment measurement target according to described basic sub-district gravity treatment measurement target tabulation is operated, and may further comprise the steps:
(i) each frequency in the described basic sub-district gravity treatment measurement target tabulation is measured, obtained the level value of each frequency;
(ii) the level value according to each frequency sorts to each sub-district in this basic sub-district gravity treatment measurement target tabulation, and determines the assessment priority of each sub-district in this basic sub-district gravity treatment measurement target tabulation;
(iii) according to this each sub-district in this basic sub-district gravity treatment measurement target tabulation is assessed, detected this sub-district and whether meet the condition that is present in the tabulation of sub-district gravity treatment measurement target according to described assessment priority; Whether this detected cells meets the condition that is present in the tabulation of sub-district gravity treatment measurement target, may further comprise the steps:
1. judge the success synchronously of described sub-district whether, if success synchronously, then execution in step 2.; Otherwise execution in step 6.;
2. judge the whether success of decoding on the Broadcast Control Channel of described sub-district, if success, then execution in step 3.; Otherwise execution in step 8.;
3. according to the measurement level value calculating path loss C1 of described sub-district;
Whether the path loss C1 that 4. judges described sub-district is greater than 0, if then the loss fail counter is subtracted 1; Otherwise, the loss fail counter is added 4;
5. judge that whether current loss failure calculator reaches the loss failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
6. the synchronization failure counter is added 1;
7. judge whether the synchronization failure counter has reached the synchronization failure threshold value of systemic presupposition,, then return the sub-district and do not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target if reach; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
8. the fail counter of will decoding adds 1;
9. judge that whether the decoding fail counter has reached the decoding failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
(iv) if not, then with the deletion from described basic sub-district gravity treatment measurement target tabulation of this sub-district, and execution in step (vi); If then this sub-district is added in the tabulation of sub-district gravity treatment measurement target, and execution in step (v);
(whether the capacity that v) detects the tabulation of described sub-district gravity treatment measurement target is higher than the sub-district reselection list capacity threshold of systemic presupposition; If then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns; If not, then execution in step is (vi);
(vi) detect whether also to exist in this sub-district gravity treatment measurement target tabulation and do not have evaluated sub-district;
(vii) if then return above-mentioned steps (ii);
(viii) if not, whether the capacity that then detects the tabulation of described sub-district gravity treatment measurement target is lower than the sub-district reselection list capacity threshold of systemic presupposition;
(xi) if not, then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns;
(x) if the processing operation that then mobile device remeasures and additional sub-district gravity treatment measurement target is tabulated may further comprise the steps:
Select the frequency in the non-basic sub-district gravity treatment measurement target tabulation system information when 1. mobile device is from the cell selecting success;
2. this frequency is measured, obtained the level value of corresponding frequency;
3. regenerate basic sub-district gravity treatment measurement target tabulation according to the pairing sub-district of each frequency, and sorted in the sub-district, and determine the assessment priority of each sub-district according to the level value of corresponding frequency;
4. repeat above-mentioned steps (iii);
(4) carry out sub-district gravity treatment detecting operation according to described sub-district gravity treatment measurement target tabulation, and the gravity treatment Target cell that satisfies the sub-district reselection conditions that obtains;
(5) according to described gravity treatment Target cell, carry out follow-up cell reselection process.
In sum, mobile communication equipment of the present invention realizes that the basic thought of method of cell reselection is as follows:
1. information in the memory device is obtained in mobile device opening initialization operation;
2. carry out cell selecting;
3. generate the tabulation of sub-district gravity treatment measurement target;
4. according to the tabulation of sub-district gravity treatment measurement target, carry out the sub-district gravity treatment and detect;
5. satisfy the sub-district reselection conditions, carry out cell reselection process;
Wherein, need to generate basic sub-district gravity treatment measurement target tabulation, this operation mainly may further comprise the steps:
1. write down the result that the full range band is measured in the cell selecting process;
2. determine the priority of each frequency according to measuring level value;
3. select the limit priority sub-district to join in the basic sub-district gravity treatment measurement target tabulation;
4. whether full, if not full, then return step 3 if detecting basic sub-district gravity treatment measurement target list size;
5., then generate basic sub-district gravity treatment measurement target and tabulate successfully if full.
Wherein, also need to generate the tabulation of sub-district gravity treatment measurement target, this operation mainly may further comprise the steps:
1. to measuring, obtain it and measure level value according to each sub-district in the basic sub-district gravity treatment measurement target tabulation;
2. select certain sub-district to assess in order, detect it and whether satisfy the condition that is present in the tabulation of sub-district gravity treatment measurement target;
3. if do not satisfy the condition that is present in the tabulation of sub-district gravity treatment measurement target
(1) with its deletion from the tabulation of sub-district gravity treatment measurement target;
(2) detect current whether all assessments are all finished;
If a) do not finish, then return step 2;
B) if finish, whether the capacity that then continues the tabulation of detection current area gravity treatment measurement target is lower than the lowest capacity threshold value;
I) if be lower than the lowest capacity capacity threshold, then non-sub-district gravity treatment measurement target tabulation in the adjacent cell list (BA) is measured, return step 2;
II) if be higher than the lowest capacity threshold value, then the tabulation of current area gravity treatment measurement target generates successfully.Return.
4. if satisfy the condition that is present in the tabulation of sub-district gravity treatment measurement target,
(1) it is joined in the tabulation of sub-district gravity treatment measurement target;
(2) whether the capacity of detection current area gravity treatment measurement target tabulation is higher than the heap(ed) capacity threshold value;
If a) be higher than the heap(ed) capacity threshold value, then withdraw from detection, the tabulation of current area gravity treatment measurement target generates successfully;
B) if be lower than the heap(ed) capacity threshold value, then turn back to above-mentioned steps 3 (2).
In the middle of reality was used, this mobile communication equipment was realized method of cell reselection, may further comprise the steps:
In step 100, at first finish the cell selecting process according to the algorithm of cell selecting, need the result that the full range band is measured in the recording cell selection course this moment;
In step 101, measurement result according to record in the step 100 generates the tabulation of sub-district gravity treatment measurement target, this process will describe in detail in the back, the Target cell frequency that has comprised the sub-district gravity treatment in the tabulation of sub-district gravity treatment measurement target, mobile device is measured action according to this frequency, obtain its measurement result, and in subsequent process, bring in constant renewal in, safeguard this tabulation;
In step 102, carry out the detection of sub-district gravity treatment according to the result who obtains in the step 101, this process gets final product according to the algorithm of at present existing sub-district gravity treatment, does not elaborate herein;
In step 103, gravity treatment target in sub-district is definite, carries out the sub-district gravity treatment.
Below explanation will mainly be paid close attention to and generate basic sub-district gravity treatment measurement target tabulation (step 200 is to step 204) and sub-district gravity treatment measurement target tabulation (step 300 is to step 310), and the several Control variable is provided in the table one,
Table one, sub-district gravity treatment measurement target list controls variable
| Variable | Implication |
| CRM_TGT_LIST_MAX_NUM | Sub-district gravity treatment measurement target list size |
| CRM_TGT_LIST_MIN_NUM | Sub-district gravity treatment measurement target tabulation lowest capacity |
Mobile device realizes that the process that generates basic sub-district gravity treatment measurement target tabulation in the method for cell reselection may further comprise the steps:
In step 200, mobile device carries out the full range band of cell selecting and measures action, writes down the measurement result of all sub-districts;
In step 201, the cell selecting success, the adjacent cell list that the analytical system information acquisition wherein comprises (BA) again according to the measurement result in the step 200, is an order with RSSI, determines the measurement priority of each sub-district in the adjacent cell list;
In step 202, during the basic sub-district gravity treatment measurement target of selecting the highest frequency of step 201 medium priority to add is tabulated;
In step 203, detect current basic sub-district gravity treatment measurement target list size and whether reached capacity thresholding CRM_TGT_LIST_MAX_NUM, if do not have, then return step 202; If reach, then execution in step 204;
In step 204, basic sub-district gravity treatment measurement target tabulation generates successfully.
Mobile device realizes that the process that generates the tabulation of sub-district gravity treatment measurement target in the method for cell reselection may further comprise the steps:
In step 300, basic sub-district gravity treatment measurement target tabulation has generated success;
In the step 301, each frequency in the tabulation of the sub-district gravity treatment measurement target in the step 300 is measured, obtained the level value (RSSI value) of each frequency;
In step 302, according to measurement result sorted in each sub-district in the sub-district gravity treatment measurement target tabulation, determine the tabulate priority of each cell measurement results assessment of sub-district gravity treatment measurement target;
In step 303, the sub-district of selecting is assessed, detect it and whether still may reside in the tabulation of current area gravity treatment measurement target, if do not satisfy the condition that exists, then execution in step 304;
In step 304, with the deletion from the tabulation of current area gravity treatment measurement target of detected sub-district;
In step 305, detecting current existence whether does not also have evaluated sub-district, if also have, then returns step 302; If finish, then execution in step 306;
In step 306, whether the capacity that detects the tabulation of current area gravity treatment measurement target is lower than the threshold value CRM_TGT_LIST_MIN_NUM of regulation, if do not have, then execution in step 310, generate sub-district gravity treatment measurement target and tabulate successfully, return.If the capacity of current area gravity treatment measurement target tabulation has been lower than CRM_TGT_LIST_MIN_NUM, then execution in step 307;
In step 307, mobile device will be measured again, to replenish current sub-district gravity treatment measurement target tabulation.Non-sub-district gravity treatment measurement target tabulation intermediate-frequeney point is measured in the selective system information, obtain its measurement result after, repeating step 302;
In the judgement of step 303, if current area meets the condition of adding the tabulation of sub-district gravity treatment measurement target to, then execution in step 308;
In step 308, mobile device adds current detected sub-district in the tabulation of sub-district gravity treatment measurement target to;
In step 309, whether the capacity that detects the tabulation of current area gravity treatment measurement target is higher than the threshold value CRM_TGT_LIST_MAX_NUM of regulation, if do not have, then execution in step 305; If be higher than threshold value, then execution in step 310;
In step 310, the tabulation of sub-district gravity treatment measurement target generates successfully, returns.
This paper introduces the condition judgment flow chart that Target cell is present in the tabulation of sub-district gravity treatment measurement target among Fig. 4, and table two has provided required variable among Fig. 4.
Table two, sub-district gravity treatment measurement target condition judgment variable
| Variable | Implication |
| TGT_FAIL_SYNC_THRESHOLD | Synchronization failure counter thresholding |
| TGT_FAIL_DECODE_THRESHOLD | Decoding fail counter thresholding |
| TGT_FAIL_C1_THRESHOLD | Loss fail counter thresholding |
In step 400, obtain measurement result value to Target cell.
In step 401, judge the whether success synchronously of current target sub-district, if success synchronously, then execution in step 402; Otherwise execution in step 408;
In step 402, upward whether decoding is successful to judge current target sub-district BCCH, if success, then execution in step 403; Otherwise execution in step 410;
In step 403, according to the measured value calculating path loss C1 of current area;
In step 404, whether judge the current path loss greater than 0, if then execution in step 405; Otherwise execution in step 406;
In step 405, the loss fail counter is subtracted 1,
In step 406, the loss fail counter is added 4,
In step 407, judge whether current loss failure calculator reaches the threshold T GT_FAIL_C1_THRESHOLD of regulation, if reach, then execution in step 413, return failure, and process finishes; Otherwise execution in step 412 returns success;
In step 408, the synchronization failure counter is added one, show current the failure once;
In step 409, detect the synchronization failure counter and whether reached threshold T GT_FAIL_SYNC_THRESHOLD, if reach, then execution in step 413 is returned failure, this process finishes; If do not reach, then execution in step 412 returns success, and process finishes;
In step 410, the fail counter of will decoding adds one, shows that current decoding BCCH channel failed once;
In step 411, judge whether the decoding fail counter has reached threshold T GT_FAIL_DECODE_THRESHOLD, if reach, then execution in step 413 is returned failure, and this process finishes; If do not reach, then execution in step 412 returns success, and process finishes.
Adopted mobile device realization method of cell reselection in the above-mentioned mobile communication system, because its system information according to full range band measurement result and when analyzing the cell selecting success generates the tabulation of sub-district gravity treatment measurement target, make mobile device fix the number of the neighbor cell that need monitor basically, greatly reduced the fluctuation that changes the neighbor cell ordering that causes because of the measurement level, and then reduced being monitored the measurement of neighbor cell, synchronously with the operation of obtaining whole system informations, not only effectively realized the cell selecting operation, and success rate is higher, significantly reduced simultaneously the power consumption under the DRX state of system, more avoided because the problem of the frequent gravity treatment in sub-district that level fluctuation caused, saved operation cost, radio communication service quality and efficiency of operation have been improved, energy-saving and cost-reducing, stable and reliable working performance, the scope of application is comparatively extensive, for further developing of present mobile communication technology established solid foundation.
In this specification, the present invention is described with reference to its certain embodiments.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 (5)
1. mobile device is realized method of cell reselection in the mobile communication system, it is characterized in that described method may further comprise the steps:
(1) mobile device carries out the opening initialization operation, and obtains the information in the storage inside module;
(2) carry out cell selecting process and write down measurement result, be specially:
Carry out the cell selecting process according to cell selecting algorithm default in the system of mobile device, and write down the full range band measurement result in this cell selecting process;
(3) generate the processing operation that gravity treatment measurement target in sub-district is tabulated according to described measurement result, may further comprise the steps:
(a) generate the processing operation that basic sub-district gravity treatment measurement target is tabulated according to described full range band measurement result;
(b) processing that generates the tabulation of sub-district gravity treatment measurement target according to described basic sub-district gravity treatment measurement target tabulation is operated;
(4) carry out sub-district gravity treatment detecting operation according to described sub-district gravity treatment measurement target tabulation, and obtain to satisfy the gravity treatment Target cell of sub-district reselection conditions;
(5) according to described gravity treatment Target cell, carry out follow-up cell reselection process.
2. mobile device is realized it is characterized in that method of cell reselection in the mobile communication system according to claim 1, describedly generates the processing operation of basic sub-district gravity treatment measurement target tabulation according to full range band measurement result, may further comprise the steps:
System information when (111) mobile device is analyzed the cell selecting success, and the neighbor cell list that obtains wherein to be comprised;
(112) measure level value according to the frequency of each sub-district in the described full range band measurement result, determine the measurement priority of each sub-district in the described neighbor cell list;
(113) the highest frequency of described neighbor cell list medium priority is joined in the basic sub-district gravity treatment measurement target tabulation;
(114) whether system's capacity of detecting current described basic sub-district gravity treatment measurement target tabulation has reached the basic sub-district reselection list capacity threshold of systemic presupposition;
(115) if not, then return above-mentioned steps (113); If then basic sub-district gravity treatment measurement target tabulation generates successfully.
3. mobile device is realized method of cell reselection in the mobile communication system according to claim 2, it is characterized in that, operate according to the processing that described basic sub-district gravity treatment measurement target tabulation generates the tabulation of sub-district gravity treatment measurement target, may further comprise the steps:
(121) each frequency in the described basic sub-district gravity treatment measurement target tabulation is measured, obtained the level value of each frequency;
(122) level value according to each frequency sorts to each sub-district in this basic sub-district gravity treatment measurement target tabulation, and determines the assessment priority of each sub-district in this basic sub-district gravity treatment measurement target tabulation;
(123) according to this each sub-district in this basic sub-district gravity treatment measurement target tabulation is assessed according to described assessment priority, detected this sub-district and whether meet the condition that is present in the tabulation of sub-district gravity treatment measurement target;
(124) if not, then with the deletion from described basic sub-district gravity treatment measurement target tabulation of this sub-district, and execution in step (126); If, then this sub-district is added in the tabulation of sub-district gravity treatment measurement target, and execution in step (125);
(125) whether the capacity of the described sub-district gravity treatment measurement target tabulation of detection is higher than the sub-district reselection list capacity threshold of systemic presupposition; If then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns; If not, execution in step (126) then;
(126) detect whether also to exist in the tabulation of this sub-district gravity treatment measurement target and do not have evaluated sub-district;
(127) if then return above-mentioned steps (122);
(128) if not, whether the capacity that then detects the tabulation of described sub-district gravity treatment measurement target is lower than the sub-district reselection list capacity threshold of systemic presupposition;
(129) if not, then the tabulation of sub-district gravity treatment measurement target generates successfully, and returns;
(130) if then the processing that mobile device remeasures and additional sub-district gravity treatment measurement target is tabulated is operated.
4. mobile device is realized method of cell reselection in the mobile communication system according to claim 3, it is characterized in that, whether described detected cells meets the condition that is present in the tabulation of sub-district gravity treatment measurement target, may further comprise the steps:
(21) judge the whether success synchronously of described sub-district, if synchronous success, then execution in step (22); Otherwise execution in step (26);
(22) judge whether success of decoding on the Broadcast Control Channel of described sub-district, if success, then execution in step (23); Otherwise execution in step (28);
(23) according to the measurement level value calculating path loss C1 of described sub-district;
(24) whether the path loss C1 that judges described sub-district is greater than 0, if then the loss fail counter is subtracted 1; Otherwise, the loss fail counter is added 4;
(25) judge that whether current loss failure calculator reaches the loss failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
(26) the synchronization failure counter is added 1;
(27) judge whether the synchronization failure counter has reached the synchronization failure threshold value of systemic presupposition,, then return the sub-district and do not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target if reach; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target;
(28) fail counter of will decoding adds 1;
(29) judge that whether the decoding fail counter has reached the decoding failure threshold value of systemic presupposition, if reach, then returns the sub-district and does not meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target; Otherwise return the sub-district and meet the result who is present in the condition in the tabulation of sub-district gravity treatment measurement target.
5. mobile device is realized it is characterized in that method of cell reselection in the mobile communication system according to claim 3, and described remeasuring and the processing operation of additional sub-district gravity treatment measurement target tabulation may further comprise the steps:
Select the frequency in the non-basic sub-district gravity treatment measurement target tabulation system information when (31) mobile device is from the cell selecting success;
(32) this frequency is measured, obtained the level value of corresponding frequency;
(33) regenerate basic sub-district gravity treatment measurement target tabulation according to the pairing sub-district of each frequency, and sorted in the sub-district, and determine the assessment priority of each sub-district according to the level value of corresponding frequency;
(34) repeat above-mentioned steps (123).
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| CN102111787B (en) * | 2009-12-28 | 2015-01-07 | 重庆重邮信科通信技术有限公司 | Method for reselecting mobile terminal cell |
| CN102137461B (en) * | 2010-01-26 | 2015-02-04 | 上海摩波彼克半导体有限公司 | Method for maintaining reselected target cell in wireless communication system |
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| CN102281601B (en) * | 2010-06-09 | 2014-12-31 | 华为技术有限公司 | Method, equipment and system for carrying out handover processing between cells |
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