CN101084692A - Mobile terminal skip zone autonomous switching method - Google Patents

Mobile terminal skip zone autonomous switching method Download PDF

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Publication number
CN101084692A
CN101084692A CNA2005800436132A CN200580043613A CN101084692A CN 101084692 A CN101084692 A CN 101084692A CN A2005800436132 A CNA2005800436132 A CN A2005800436132A CN 200580043613 A CN200580043613 A CN 200580043613A CN 101084692 A CN101084692 A CN 101084692A
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pilot
mobile terminal
energy
activation
channel resource
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CN100551121C (en
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刘学敏
方惠英
张万帅
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection

Abstract

A method of mobile terminal autonomous handoff includes: determining a dispatch area; building channel resource of all adjacent cells in said dispatch area, and normally transmitting and receiving signals in calling procedure; transmitting channel resource of adjacent cells in forward channel; mobile terminal obtaining forward pilot energy and channel resource configuration information of adjacent cells from forward channel; mobile terminal measuring forward pilot energy and comparing it with handoff threshold, and when forward pilot energy meets the conditions of soft handoff , performing soft handoff; when forward pilot energy meets the conditions of hard handoff , performing operation steps of hard handoff etc . The present invention does not need to exchange signaling in advance between mobile terminal and base station and then obtain corresponding resource of adjacent cells in order to realize allocation of channel resource, but enable mobile terminal to directly obtain each pilot parameter of adjacent cells through base station issuing channel resource of all adjacent cells in the form of broadcast in dispatch area, and adjust and update its activate pilot set and pilot set of adjacent cells based on quality state of itself current received signals, consequently mobile terminal realizes autonomous handoff.

Description

Mobile terminal skip zone autonomous switching method
The method of mobile terminal skip zone autonomous switching
Technical field
The present invention relates to a kind of method of mobile terminal skip zone autonomous switching, particularly one kind is in mobile cellular communication system, mobile terminal interacts without the hand off signaling between base station and mobile terminal according to the signaling message of base station periodic broadcasting and performs the method independently switched.Background technology
In mobile cellular communication system, when mobile terminal carries out handover, it is the forward pilot signal energy information for measuring different districts first, and the district pilots energy measurement information reporting more than handoff threshold to base station, resource allocation is switched over by base station, and notify mobile terminal to set up corresponding channel resource, finally realize the handover of mobile terminal.Fig. 1 is handover schematic diagram, and mobile terminal, into cell A moving process, there occurs soft handover from cell B, while setting up voice channel with cell B and cell A.The handover procedure of usual mobile terminal is as follows：
When some pilot frequency intensity that mobile terminal MS detects adjacent pilot frequencies concentration exceedes soft handover plus thresholding T_ADD, Pilot Strength Measurement Message PS gangsters are sent to base station BS, and the pilot tone is moved on into candidate pilot and are concentrated；BS sends switch indicating information；The pilot tone is transferred in activation pilot set by MS, and sends handoff completion message.
When some pilot frequency intensity that mobile terminal MS is detected in activation pilot set removes thresholding DROP less than soft handover, MS starts switching and removes timer；If timer expiry is removed in switching, the pilot frequency intensity still is below T-DROP, and MS sends PSMM;BS sends switch indicating information；The pilot tone is moved on to adjacent pilot frequencies from activation pilot set and concentrated by MS, and sends handoff completion message.
, it is necessary to Signalling exchange between base station and mobile terminal in above-mentioned handoff procedure, and because signalling interactive process is possible to long, therefore it is unsuccessful to be easily caused switching, or even call drop.Quickly, before handoff procedure has not been completed, forward link quality is very by the Xin Shuai Minus of such as former activation cell Difference, is not enough to maintain link.Especially CDMA mobile cellular systems（Self-interference system）, because abutting subdistrict is with frequency, before switching, the strong pilot tone in adjacent area is exactly a strong jamming, after switching, can provide very high diversity gain, more short better it is desirable to switching time.Equally, the weak pilot tone that activation is concentrated, takes the more search capability of mobile terminal, have impact on the search speed of the strong pilot tone in adjacent area, is influenced each other with the strong Pilot Interference in adjacent area and more aggravates the probability that forward link is deteriorated.Due to switching plus with going, all triggered by mobile terminal, therefore, if mobile terminal can independently complete switching, it is not necessary to if carrying out Signalling exchange with base station, switch speed can be greatly improved, ensure link-quality, and reduce the probability of call drop.In some special systems, such as group system, multiple mobile terminal time-divisions share air traffic channel resource, so, using autonomous switching, there is no base station to interact signaling with the switching of mobile terminal, it is possible to the load of shared air traffic channel resource, prevent excessive signaling from colliding and channel congestion.
Therefore, disclosing a kind of method in United States Patent (USP) US006725043B2, it is not necessary to Signalling exchange, the autonomous switching of mobile terminal is realized.In that patent, after mobile terminal is received before certain amount to frame by mistake, transmitting is closed, and in base station side, it is found that receiving energy is less than certain thresholding（Because mobile terminal closes transmitting）, then some neighbor base stations can be can determine whether according to the pilot measurement message of mobile terminal reporting, adjacent area, call drop historical information etc. information（Referred to as rescue base station）Resource is set up, the reverse signal of the mobile terminal is searched for.After transmitting a period of time is closed, mobile terminal reopens transmitting, these rescue base stations are captured after the reverse signal of the mobile terminal, just in forward direction transmission signal, is linked so as to set up with mobile terminal.
The above method is directed to forward link and has been not enough in the case of maintaining signal quality, and now, mobile terminal can not carry out Signalling exchange substantially with base station, in order to switch successfully, determine that rescue base station is very crucial.Mistake in judgment, then link can not recover, if the rescue base station specified is excessive, the wasting of resources.Also, rescue base station, which sets up channel resource and search, needs the time, inevitably affects the impression of user, if overlong time, user can be because the on-hook without speech for a long time.
Under normal circumstances, if forward signal can also maintain link-quality, it can complete to switch by Signalling exchange.Only oversize when the hand-off process time, and in processing procedure, forward link signal becomes very weak, now, the autonomous switching method described by the patent prevents call drop, is actually One kind remedies mode.It can thus be seen that the method disclosed in above-mentioned patent is not inherently eliminated because handover delay causes systematic function to decline this problem.Therefore, autonomous switching mode can be used at any time, so as to avoid because signaling interaction time is long between base station and mobile terminal, realized being switched fast truly, be significantly for improving speech quality and reduction cutting off rate.The content of the invention
It is an object of the invention to for above-mentioned mobile terminal carry out handover procedure in due to signaling interaction time it is long and may caused by communication quality decline or call drop and current mobile terminal autonomous switching can not be inherently eliminated because handover delay cause systematic function to decline this problem, and a kind of method of mobile terminal skip zone autonomous switching is provided, this method is shared in mobile terminal under the premise of identical channel resource, switch decision can be passed through, corresponding channels of neighboring areas resource is selected, autonomous handover is realized.To achieve the above object, the present invention uses a kind of method of mobile terminal skip zone autonomous switching, comprises the following steps：Step 1:Determine a dispatch area, the dispatch area includes multiple geographically adjacent cells；Bu Sudden 2:In the dispatch area, at the beginning of calling, base station side sets up the channel resource of all adjacent cells, and is normally sent and received signal in calling procedure, until calling release；
Step 3:In each described cell, the base station sends the channel resource of adjacent cell on forward channels；
Step 4:Mobile terminal is conversed in the dispatch area with moving process, and the forward pilot energy and channel resource configuration information of the adjacent cell are obtained from forward channel；Step 5:The mobile terminal measures the forward pilot energy, and is compared with handoff threshold, when the forward pilot energy meets soft handoff condition, performs and gets over area's soft handover；When the forward pilot energy meets direct-cut operation condition, perform and get over area's direct-cut operation.
The present invention need not first carry out Signalling exchange it can be seen from above-mentioned technical proposal between mobile terminal and base station, then obtain corresponding resource in adjacent area, realize the distribution of channel resource, but by one In dispatch area, the channel resource of all adjacent areas is issued by the way of broadcast in base station, mobile terminal is set directly to obtain every resource parameters of adjacent area, according to the quality state of its own current Received Signal, adjust, its activation pilot set and neighbor pilot collection are updated, so as to realize skip zone autonomous switching.The present invention realizes that the skip zone autonomous switching of mobile terminal is more beneficial for playing systematic function for the mobile communcations system of some specific functions, such as cluster communication system.In a dispatch area of cluster communication system（The service range that group is exhaled in adjacent multiple cells, cluster-specific system typically on geographical position, there is provided group-calling service in dispatch area, outside dispatch area, is not then provided）, identical channel resource is shared between mobile terminal, the communication between all mobile terminals is realized.Under normal circumstances, in the dispatch area residing for mobile terminal, the channel resource of each adjacent area is it has been established that therefore, there is no need to carry out the distribution of channel resource again between mobile terminal and base station.Therefore, as long as mobile terminal can get the channel resource information of adjacent area, it is not necessary to switch over Signalling exchange between mobile terminal and base station, it is not required that
The mobile terminal of US006725043B2 patent requirements closes transmitting, determines that rescue base station, and mobile terminal re-emit process.Hereinafter, by the specific implementation process of the skip zone autonomous handoff procedure of mobile terminal in a cluster communication system and the present invention is described in further detail with reference to accompanying drawing.Brief description of the drawings
Fig. 1 handover schematic diagrames.
The autonomous switching flow of Fig. 2 mobile terminals.
Add flow to the autonomous soft handover of voice channel before Fig. 3.
Before Fig. 4 flow is gone to the autonomous soft handover of voice channel.
The autonomous direct-cut operation flow of Fig. 5 signaling channels.Embodiment
Mobile terminal is when carrying out skip zone autonomous switching, mainly by following steps：
Bu Sudden 1:Determine a dispatch area, the dispatch area includes multiple geographically adjacent cells. In cluster communication system, define a dispatch area for including multiple geographically adjacent cells first, the mobile terminal of cluster be dispersed in be fixed in the range of dispatch area or mobile status under PTT groups exhale.
Step 2:In dispatch area, at the beginning of calling, base station side sets up the channel resource of all adjacent cells, and is normally sent and received signal in calling procedure, is put until Hu is Feng.
The corresponding channel resource set up, including to voice channel and a forward signaling channel, and a reverse signalling channel before one, under the adjacent cell, the mobile terminal of all tins of users shares these channel resources.
Step 3:In each cell, base station sends the channel resource of neighbor cell on forward channels.Base station is on forward signaling channel, cycle sends the channel resource configuration information of adjacent area, because the Neighboring Cell List of different adjacent areas is different, therefore, mobile terminal can only realize direct-cut operation on forward signaling channel, and on forward direction voice channel, the content that different adjacent areas are sent is identical, soft handover can be realized, so as to improve speech quality.On reverse signalling channel, because the mobile terminal of all tins of users under the dispatch area is shared, after it uses autonomous switching, it is possible to reduce backward signaling is sent, and also just alleviates the load of the reverse sharing signaling channel, reduces collision, it is to avoid signaling congestion.Therefore, for the system using shared channel, mobile terminal independently switches, and can not only improve switch speed, and can reduce the collision of the signaling in shared channel.
The flow that Fig. 2 is provided is the principle process that mobile terminal carries out autonomous handover, in unit 201, and mobile terminal performs step 4:Mobile terminal is conversed in the dispatch area with moving process, and the forward pilot energy and channel resource configuration information of the adjacent cell are obtained from forward channel.
In unit 202, mobile terminal performs step 5:Mobile terminal measures forward pilot energy, and is compared with handoff threshold, when forward pilot energy meets soft handoff condition, performs and gets over area's soft handover, the soft handover that skip zone autonomous switching can be subdivided into voice channel is gone, soft handover adds；When forward pilot energy meets direct-cut operation condition, perform and get over area's direct-cut operation.More area's cut is changed to the direct-cut operation of signaling channel.
Fig. 3 to Fig. 5 sets forth mobile terminal and skip zone autonomous soft handover carried out to voice channel using method provided by the present invention and the concrete operations flow of skip zone autonomous direct-cut operation is carried out to signaling channel.
It should be clear that, the activation pilot set of voice channel and the activation of neighbor pilot collection and signaling channel Pilot set is different with neighbor pilot collection.Because voice channel supports soft handover, signaling channel uses hard handover approach, thus, the activation pilot set of voice channel can include multiple activation pilot tones, and its neighbor pilot collection is the combination of these all adjacent areas of activation pilot tone, and the activation pilot set only one of which activation pilot tone of signaling channel, its neighbor pilot collection both can be the neighbor pilot of the activation pilot tone or the neighbor pilot collection of voice channel.
Mobile terminal is in skip zone autonomous switching is carried out, and the flow shown in corresponding diagram 3, Fig. 4 and Fig. 5, in whole calling procedure, circulates and perform above voice channel soft handover and signaling channel direct-cut operation step respectively.
In figure 3, mobile terminal carries out the soft handover of voice channel and added first, and its complete process is as follows：Performed since unit 301 with each step described in lower unit.
Unit 302, the forward pilot energy for selecting first adjacent cell（It is assumed to be D) and obtain channel resource configuration information；
Unit 303, acquisition forward pilot energy S (t);
Unit 304, decide whether meet switching plus condition, that is whether S (t) is more than or equal to soft handover thresholding T-ADD, if it is, into Unit 305, judging whether the activation pilot number activated in pilot set has reached the upper limit that system is set（Such as, system sets cubic soft handover, and activates pilot number and reach 4）If being not reaching to the upper limit, it is transferred to unit 306 and unit 310, the channel resource configuration information that mobile terminal is obtained in the mark and unit 302 according to neighbor cell, set up corresponding channel resource, update it and activate pilot set and neighbor pilot collection, realize that the soft handover of voice channel adds.S (t) is less than soft handover thresholding T-ADD, directlyMillion go to unit 311, select the forward pilot energy of next adjacent cell.In said units 305, if activation pilot number has reached the upper limit, take and replace most weak activation pilot approach, into unit 307, acquisition for mobile terminal activates the forward pilot energy P (t) of the minimum neighbor cell E of pilot energy in pilot set;Unit 308, judge whether difference S (the t)-P (t) of pilot energy of time pilot signal energy and the minimum neighbor cell is more than or equal to threshold T-C0MP that system is pre-set, if, then enter unit 309 and unit 310, the channel resource of the neighbor cell of minimum is first discharged, it is rear to carry out soft handover add operation；If not the then step in execution unit 311. If S (t)-P (t) difference is less than T_C0MP, unit 311 is jumped directly to.Unit 311 determine whether also other neighbor cells without handling, if so, being then transferred to unit 312, mobile terminal selects next neighbor cell to be simultaneously directed to the neighbor cell returning unit 303;If without the soft handover for entering voice channel is gone（A in figure), its flow such as Fig. 4.
In Fig. 4, unit 401, mobile terminal the 1st activation pilot tone of selection in activation pilot set is set to F;Unit 402, the energy Sf (t) for obtaining the activation pilot tone；
Unit 403, switch over judgement, if the energy Sf (t) of activation pilot tone removes thresholding T-DROP less than soft handover, it is transferred to unit 406, judge whether last moment Sf (t) is more than or equal to T-DROP, if it is, starting switching removes timer（Unit 407) after, judge that switching goes timer whether overtime in unit 408, if, in unit 409, switching is resetted to go after timer, judge whether activation pilot number is not less than 2 in unit 410, if, then the channel resource corresponding to first neighbor cell F is discharged in unit 411, and update activation pilot set and neighbor pilot collection, then whether there are other activation pilot tones in unit 412 judges activation pilot set, it is, then in unit 413, mobile terminal selects next activation pilot tone, and for the activation pilot tone returning unit 402 obtain the activation pilot tone energy make decisions, otherwise, it is transferred to the direct-cut operation flow of signaling channel（B in figure).
In above-mentioned processing procedure, when the energy Sf (t) that the court verdict of unit 403 is activation pilot tone is not less than T_DR0P, then jump to unit 404, whether the energy Sf (t) for adjudicating the last moment activation pilot tone is less than T-DROP, if it is, needing reset switching to remove timer（Unit405) unit 41 is transferred to after2；If it is not, jumping directly to unit 412.When the Sf (t) of last moment in unit 406 is less than T-DROP, then unit 408 is directly transferred to.In unit 408, if not timed out then jumping to unit "2.In unit 410, if activation pilot number is not less than 2, unit 412 is jumped to.
Carried out in the energy for activating pilot tone when soft handover is gone, it is necessary to meet two conditions, one is less than handoff threshold T-DROP, another is that requirement is kept for a period of time.Accordingly, it would be desirable to judge timer whether then in unit 408.In addition, mobile terminal must maintain at least one to activate pilot tone, if so, weak activation pilot tone then can be removed by switching.
The direct-cut operation of signaling channel is as shown in Figure 5.In figure, unit 501 obtains activation pilot tone（Only There is one）Energy is set to P (t), and unit 502 selects the 1st neighbor cell to be set to G.Unit 503 obtains neighbor cell G forward pilot energy Sg(t).Because the judgement of direct-cut operation is that neighbor cell forward pilot energy exceedes activation how many values of pilot energy, therefore difference is used as using T-C0MPG.The judgement of unit 504 is, if Sg(t) the pilot energy difference that-P (t) is obtained is not less than T_C0MPG, then into unit 505, first discharge the channel resource corresponding to the currently active pilot tone, after set up the channel resource of neighbor cell G corresponding to the pilot energy of adjacent area, in unit 506, make P (t)=Sg(t), and activation pilot set is updated；In unit 507, new signaling channel obtains and preserves new neighbor cell G list and corresponding channel resource configuration information from the channel resource set up；In unit 508, new neighbor pilot search listing is set.
In unit 504, if the pilot energy difference that Sg (t)-P (t) is obtained is less than T-COMPG, then jump to unit 509, judge whether also next neighbor cell, if, the returning unit 503 after unit 510 selects next neighboring cell pilot, otherwise, terminates to exit.So far, the skip zone autonomous handoff procedure of a mobile terminal is completed, and in next cycle period since new, i.e., since Fig. 3 unit 301, into the new skip zone autonomous handoff procedure of measurement.
In summary, the channel resource of each neighbor cell is established by realizing, and on forward channels, the neighboring cell channel resource distribution of mobile terminal is sent to mobile terminal, so, mobile terminal can just use autonomous switching method, accelerate switch speed.For group system etc., its performance of handoffs can be optimized, and reduce the load of shared channel, and its collision probability, the particular characteristic demand of system is preferably met.

Claims (4)

  1. Claim
    1st, a kind of method of mobile terminal skip zone autonomous switching, it is characterised in that：It comprises the following steps：Step 1:Determine a dispatch area, the dispatch area includes multiple geographically adjacent cells；Step 2:In the dispatch area, at the beginning of calling, base station side sets up the channel resource of all adjacent cells, and is normally sent and received signal in calling procedure, until calling release；
    Step 3:In each described cell, the base station sends the channel resource of neighbor cell on forward channels；
    Step 4:Mobile terminal is conversed in the dispatch area with moving process, and the forward pilot energy and channel resource configuration information of the adjacent cell are obtained from forward channel；
    Step 5:The mobile terminal measures the forward pilot energy, and is compared with handoff threshold, when the forward pilot energy meet soft handover how part when, perform and get over area's soft handover;When the forward pilot energy meets direct-cut operation condition, perform and get over area's direct-cut operation.
    2nd, the method for mobile terminal skip zone autonomous switching according to claim 1, it is characterised in that：Described step 5 is specifically included：
    Step 5a:The mobile terminal measures the forward pilot energy, when the forward pilot energy adds thresholding more than or equal to soft handover, and the mobile terminal carries out soft handover and added；The detailed process that the soft handover adds is the channel resource configuration information obtained in the mark and step 4 according to the neighbor cell, sets up corresponding channel resource, updates it and activates pilot set and neighbor pilot collection；Step 5b:Mobile terminal selection in the activation pilot set activates pilot tone and obtains the activation pilot energy of the activation pilot tone, when the activation pilot energy removes thresholding less than soft handover, the mobile terminal starts switching and removes timer, after timer expiry, directly discharge the corresponding channel resource of activation pilot energy and update it and activate pilot set and neighbor pilot collection；
    Step 5c:The mobile terminal obtains the energy of the currently active pilot tone in the activation pilot set, the forward pilot energy that the neighbor pilot concentrates a neighbor cell is obtained again, judges whether the difference of the energy of the currently active pilot tone and the pilot energy of the neighbor cell is more than or equal to preset reference Value, when more than or equal to when, first discharge the channel resource corresponding to the currently active pilot tone, the channel resource of the neighbor cell corresponding to the pilot energy of the neighbor cell is set up afterwards, the energy of the currently active pilot tone is replaced with into the pilot energy of the neighbor cell and the activation pilot set is updated, new signaling channel obtains and preserves new Neighboring Cell List and corresponding channel resource configuration information from the channel resource set up；New neighbor pilot search listing is set；When less than when, judge whether also next neighbor cell, if so, then obtaining the forward pilot energy of next neighbor cell, return and judge whether the activation pilot energy and the difference of the forward pilot energy are more than or equal to the operation that preset reference point is carried out；If it is not, then completing once more area's direct-cut operation.
    3rd, the method for mobile terminal skip zone autonomous switching according to claim 2, it is characterised in that：Described step 5a is still further comprised walks Sudden in detail below：Step 5a- 1, when the forward pilot energy adds thresholding more than or equal to soft handover, judge it is described activation pilot set in activation pilot number whether reached system set the upper limit, if be not up to, carry out the soft handover add operation;If having reached, following steps are continued executing with;When the pilot energy adds thresholding less than soft handover, step 5a -4 is jumped to；
    The pilot energy of the minimum neighbor cell of pilot energy in pilot set is activated described in step 5a- 2, the acquisition for mobile terminal；
    Step 5a-3, judge whether the difference of pilot energy of the time pilot signal energy and the minimum neighbor cell is more than or equal to the threshold value that system is pre-set, if then first discharging the channel resource of the minimum neighbor cell, the soft handover add operation is carried out afterwards；If not then continuing executing with following steps；
    Bu Sudden 5a- 4, judge whether also other neighbor cells, if so, the mobile terminal then carries out return to step 5a- 1 operation for next neighbor cell；If it is not, then performing Bu Sudden 5b.
    4th, the method for mobile terminal skip zone autonomous switching according to claim 2, it is characterised in that：Described step 5b is specially： The selection first in the activation pilot set of step 5b- 1, the mobile terminal activates pilot tone and obtains the energy of the activation pilot tone, when the energy of the activation pilot tone removes thresholding less than the soft handover, judge whether the energy that pilot tone is activated described in last moment removes thresholding more than or equal to the soft handover, go to perform Bu Sudden 5b- 2 after timer if so, the mobile terminal starts switching;If it is not, then directly performing Bu Sudden 5b-2;When the energy of the activation pilot tone removes thresholding not less than the soft handover, judge whether the energy that pilot tone is activated described in last moment removes thresholding less than the soft handover, if so, then going timer to reset the switching, then perform step 5b- 5;If it is not, then directly performing step 5b- 5;Bu Sudden 5b- 2, judge that the switching goes timer whether overtime, if so, then going timer to perform step 5b- 3 after resetting the switching;If it is not, then directly performing step 5b- 5;Step 5b- 3, judge whether the quantity of the activation pilot tone is not less than 2, if it is, performing step 5b-4;If it is not, then performing step 5b- 5;The channel resource of activation pilot tone correspondence neighbor cell described in step 5b-4, direct release steps 5b- 1 simultaneously updates activation pilot set and neighbor pilot collection；
    Step 5b- 5, judge it is described activation pilot set in whether also have other activation pilot tones, if so, the mobile terminal then be directed to next activation pilot tone, return to step 5b- 1;If it is not, then continuing executing with step 5c.
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