CN100399858C - Selecting method of switching target community in TDD/CDMA system - Google Patents
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Abstract
The present invention relates to a selecting method based on hard resources for switching target cells in a TDD/CDMA system. The present invention adopts a criterion that signal strength, signal quality and code channel resources are jointly judged to favorably ensure users' continuous communication quality. In the process of switching, adjacent cells which are in accordance with main switching conditions are used as candidate cells; the priority of the candidate cells is arrayed according to the number of free hard resources reacting spread spectrum code resources. The principles of arraying the priority comprises: the priority is arranged according to the number of the free resource units of the candidate cells; the priority is arranged according to the number of free resource units of the candidate cells, which are reserved for switching; the priority is arranged according to the maximum value of the number of the free resource units of each single time slot of the candidate cells; the priority is arranged according to the maximum value of the number of the free resource units of each single time slot of the candidate cells, and the free resource units are reserved for the switching; the principles can be used separately or partially or completely; the more the free hard resources are, and the higher the priority is. The cell which has the highest priority is used as a switching target cell.
Description
Technical field
The present invention relates to the handoff techniques in the cellular mobile communication technology, relate to the system of selection of a kind of switching target small area in time division duplex/code division multiple access (TDD/CDMA) mobile communication system or rather, in promptly a kind of handover procedure to the ordering and the system of selection of Target cell.
Background technology
In mobile communication system, handover procedure in the time of will leaving the service range of this sub-district owing to a variety of causes, will take place in user terminal after initial Serving cell and network are realized being connected.Handover procedure as in Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system switches to other Serving cell by the connection with user terminal from former Serving cell exactly, thereby keeps communication continuity, can break in service.
Traditional switching controls process is: by Serving cell (base station equipment) signal level, the signal quality that moving table measuring received, and the parameters such as signal level of adjacent cell (base station equipment), and report network; Network calls handoff algorithms after receiving the measurement report of travelling carriage, adopts certain decision rule to carry out switch decision, need carry out the sub-district when switching when judging, and selects at least one adjacent cell as the candidate cell that switches according to measurement result; And then in candidate cell, adopt certain criterion, and for example according to signal strength signal intensity and signal quality etc., from candidate cell, select one and finally be used to the Target cell that switches, realize switching.The criterion of select target sub-district can consider that principle is to try not to switch in the Target cell that received signal is weak or interference level is high according to the signal level or the interference level of reception of neighboring cell.
The handoff algorithms of GSM specification recommends comprises uplink and downlink signal criterion of strength, uplink downlink quality criterion, power budget criterion and distance criterion.Constantly complicated along with network configuration also emerges some translational speeds and network reason criterions such as (pressure that triggers when referring to network congestion are switched).
The system of selection of present existing switching target small area has a lot, and the above-mentioned criterion of main foundation is assisted switch decision, and selects best target cell.As select the strongest adjacent sub-district of pilot signal as best target cell, and perhaps select the best adjacent sub-district of signal quality as best target cell, perhaps select adjacent sub-district that pilot signal arrives travelling carriage path loss minimum as best target cell etc.
The uplink and downlink signal criterion of strength is very important criterion in the switch decision (but being not unique criterion).Existing uplink and downlink signal criterion of strength, the main method that adopts is to come the assisted Selection Target cell according to some signal measurements.Because the wireless transmission environment is complicated and changeable, the precision of measured value and measurement filter algorithm will directly influence the order of accuarcy of switch decision.Measure error will directly influence court verdict sometimes, cause error in judgement.
Come the select target sub-district if rely on signal strength measurement report merely, and do not consider the current load condition of adjacent sub-district, occurring the strongest sub-district of signal does not probably but have the situation of enough idle channel resources, is not admitted by Target cell and causes handoff failure thereby cause switching the user.Just need attempt other sub-district in the candidate cell this moment again, carries out the admittance control procedure of Target cell, or wait for that measurement report next time carries out switch decision next time.Though the user also might occur is handover success by the Target cell admittance, because this Target cell load is very heavy, the call drop situation takes place in user soon under strong jamming.Both of these case all can make user's communication quality descend, even communication disruption occurs, and may cause the decline of entire system performance.
At present, mobile communication system also according to priority sorts to the adjacent sub-district (candidate cell) that meets basic switching condition according to signal measurements mostly, selects the highest sub-district of priority as Target cell.Such as user terminal (UE) is measured the pilot signal strength of neighbor cell and is carried out prioritization by pilot signal strength in the handoff procedure, select pilot signal the strongest, be that the highest sub-district of priority is soundd out as Target cell earlier and inserted.If this Target cell can not be admitted this user, then select time high sub-district exploration access in the prioritization, by that analogy.From this process, be not difficult to find, have only Target cell that enough resources are arranged, could guarantee to switch the user and when souning out access, have the higher probability of success.
The patent No. is 99116197.1, denomination of invention is a kind ofly calculated the method for Target cell dynamic priority based on idle transmission channel (TCH) percentage and power budget nargin in the sub-district for having proposed in the Chinese patent of " a kind of method for handover control based on dynamic priority in small region ", in order to assist to judge the Target cell that switches.
In the above-mentioned patented technology scheme, considered that when the target setting native region priority load condition that the sub-district is current, specific practice are to monitor payload with the form of idle transmission channel (TCH) percentage in the sub-district.Yet, the 3G system provides diversified form of service, because the required bandwidth difference of bearer service, the needed target signal to noise ratio of various traffic channels is also different, emission or the power that receives also differ greatly, and therefore the notion of idle transmission channel can not characterize the capacity and the load condition of sub-district exactly.With general cdma system is example, and a transmission channel may be carried by a plurality of spread spectrum code channels, and the spreading factor of each spread spectrum code channel may have nothing in common with each other; Even the spread spectrum code channel of the same same spreading factor of number, carrying different business desired power resource also differs widely.
Power resource is a most critical resource (parameter) of calculating the cdma system capacity, but except power parameter, the very important resource (parameter) when the code channel number also is the computing system capacity.For TDD-CDMA system, each time slot can only support limited a plurality of code channel to be used simultaneously, such as the TD-SCDMA system, each time slot can be supported 16 code channels (spread spectrum coefficient is 16) at most simultaneously, and Frequency Division Duplexing (FDD) (FDD) system has up to a hundred the code channels can be for using simultaneously.Therefore, an important feature of TDD/CDMA system is when the computing system capacity, the influence of power limited reduction, and the limited influence of code channel shows especially, thereby when selecting switching target small area, also should take into full account the code channel resource of switching target small area free time.
In 3G and back 3G system, will progressively adopt advanced mobile communication technology such as joint-detection (JD), smart antenna (SA), be used for alleviating the influence that multiple access disturbs and multipath disturbs of cdma system, thereby improve the channel utilization of system greatly.The influence of power limited reduction when the JD/SA technology makes the computing network capacity, and the limited influence of code channel shows especially, these characteristics yet are not fully utilized in selecting switching target small area.
Summary of the invention
The objective of the invention is to design the selecting method of switching target community in a kind of TDD/CDMA system, select optimal switching target small area by easy method based on hardware resources, thereby the raising handover success rate finally guarantees the continuity and the stability of telex network.
Involved hardware resources in the inventive method mainly refers to spread spectrum code resources, and what of hardware resources are weighed with the number of Resource Unit, and for the TDD/CDMA system, a Resource Unit is exactly a frequency/time slot/combination of spreading codes.Simpler saying is: Resource Unit be exactly a spreading factor be 16 code channel, be each code channel on each time slot of each carrier frequency.And the mode of the idle hardware resources quantity of adjacent sub-district by database in the polling of radio network controller (RNC) just can directly obtain.
The technical scheme that realizes the object of the invention is: the selecting method of switching target community in a kind of TDD/CDMA system comprises: the candidate cell that obtains to satisfy basic switching condition by measurement report; Candidate cell is carried out prioritization; Press the prioritization of candidate cell, the selective sequential Target cell is carried out cell switch process, it is characterized in that:
Described candidate cell is carried out prioritization, comprising:
A. obtain the idling-resource unit number of its spread spectrum code resources of reflection of each candidate cell under each predetermined principle, and carry out prioritization by idling-resource unit number size, obtain each candidate cell each prioritization value under each predetermined principle;
B. use the weight coefficient corresponding to be weighted processing respectively to each candidate cell each prioritization value under each predetermined principle with predetermined principle;
C. the weighted result to each the prioritization value of each candidate cell under each predetermined principle gathers, and obtains the priority of each candidate cell, and the priority to each candidate cell sorts again, obtains the prioritization of candidate cell.
Based on the selecting method of switching target community of hardware resources, in handoff procedure, will meet the adjacent sub-district of switching primary condition and classify candidate cell as in the TDD/CDMA of the present invention system; According to what of idle hardware resources is the candidate cell priority of disposing order, and idle hardware resources is many more, and priority is high more; Select the highest sub-district of priority as switching target small area, system sends to instruct and allows the user switch to this sub-district then.
The inventive method can comprise what according to idle hardware resources to the concrete principle that each candidate cell carries out prioritization: according to candidate cell idling-resource unit number priority is set, obtains the priority value K of this candidate cell
1According to the candidate cell free time, for the Resource Unit number of handoff reservation is provided with priority, obtain the priority value K of this candidate cell
2Maximum according to candidate cell list time slot idling-resource unit number is provided with priority, obtains the priority value K of this candidate cell
3According to the maximum candidate cell list time slot free time, that be the Resource Unit number of handoff reservation priority is set, obtains the priority value K of this candidate cell
4These prioritization principles can be used separately, also can partly or entirely unite use.When part is used or is all used, each candidate cell is by formula carried out certain weighted at the priority result that various principles obtain respectively, obtain the priority value of each candidate cell, and finally obtain the candidate cell prioritization.
The inventive method is compared with aforementioned cited prior art, TDD/CDMA system time division duplex and the limited characteristics of code channel have been taken into full account, idle hardware resources quantity and distribution situation select target sub-district according to candidate cell, help to improve mobile subscriber's handover success rate, keep communication continuity and stability; Adopt hardware resources-spread spectrum code resources as decision rule simultaneously, only need carry out radio network controller (RNC) can obtain candidate cell to the query manipulation of internal database spread spectrum code resources, carry out prioritization on this basis, sort by priority then and switch.Method is easy and accurately directly perceived, and this method helps the load of balance minizone, finally improves the resource utilization of system.
Technical scheme of the present invention is compared with the disclosed scheme of 99116197.1 Chinese patents, and their common ground is all to have considered the influence of system loading to switching target small area.Difference is: the present invention program is that unit investigates the load of switching target small area with the code channel, and is more direct and accurate; And it is the influence of handoff reservation code channel resource quantity that the present invention has also considered adjacent sub-district except the influence of considering idle code channel resource, can better guarantee user's handover success rate.
Description of drawings
Fig. 1 is that switching target small area of the present invention is selected FB(flow block).
Embodiment
As cell mobile communication systems, (UE) marches to the Serving cell edge when user terminal, the interference signal of adjacent cell strengthens because this cell signal dies down, the user's communications quality can't guarantee, need this moment triggering system to carry out the sub-district and switch, to guarantee the continuity of user terminal communication.
The triggering cell change action, common measurement report according to base station and terminal to report, these measurement reports mainly comprise the variation of indexs such as the pilot signal strength, signal quality, interference signal intensity of this sub-district of monitoring and adjacent sub-district, switch in case network terminal just triggered when finding that certain or some indexs change and surpassing corresponding default thresholding.The measurement index that is commonly used to trigger switching in the 3G system comprises pilot frequency channel signal intensity (basic Common Control Channel P-CCPCH, received signal code power RSCP and received signal intensity indication RSSI), signal quality (error rate/Block Error Rate BER/BLER), Interference Signal Code Power (slot interfering signal of time sign indicating number power Timeslot ISCP) etc.
In the inventive method, network terminal is that will to satisfy the adjacent sub-district of switching primary condition earlier be candidate cell, by the priority that how much is provided with of idle hardware resources when selecting switching target small area.
The primary condition of switching referred to the pilot signal strength that terminal measures this sub-district and continue to be lower than predetermined threshold value in a period of time, perhaps adjacent cell signal strength surpasses given thresholding of this cell signal strength, perhaps channel quality (BER/BLER) deteriorates into below the default thresholding, and above-mentioned these phenomenons have continued certain time interval T, then the triggering cell change action.
Then, according to candidate cell of priority selective sequential from high in the end as Target cell.Can be admitted at this Target cell if switch the user, then carry out channel and reshuffle, and discharge the communication link of former sub-district at Target cell; If do not admitted, then select priority time high candidate cell to continue to attempt admitting; If all candidate cells all can not be admitted, this handoff failure then, the communication link that the user will remain on former sub-district continues communication.
Simultaneously, the resource allocation conditions that constantly keeps each sub-district in the system information storehouse of radio network controller (RNC), just can directly obtain the idle hardware resources quantity of adjacent sub-district by the mode of Query Database, not only very easy, the more important thing is and can improve success rate for switching of user greatly.
The present invention carries out prioritization according to the hardware resources number to candidate cell and is provided with multiple principle, comprising: (1) is provided with priority according to candidate cell idling-resource unit number, obtains priority value K
1(2) according to the candidate cell free time, for the Resource Unit number of handoff reservation is provided with priority, obtain priority value K
2(3) maximum according to candidate cell list time slot idling-resource unit number is provided with priority, obtains priority value K
3(4) according to the maximum candidate cell list time slot free time, that be the Resource Unit number of handoff reservation priority is set, obtains priority value K
4
These four kinds of principles can be used separately, also can partly or entirely unite use.Be example with whole the use, system can obtain the priority value K of each candidate cell under four principles respectively according to above-mentioned four principles
1, K
2, K
3, K
4, then to K
1, K
2, K
3, K
4By being weighted processing with the weight coefficient under the corresponding principle respectively, finally determine the priority of each candidate cell; System will select that the highest candidate cell of priority is a switching target small area after the weighted.
Various principles are mainly adjusted by weighted factor candidate cell priority result's contribution, the priority of each candidate cell (cell-priority) expression-form as shown in Equation (1):
Cell_Priority＝α·K
1+β·K
2+γ·K
3+λ·K
4 (1)
α wherein, beta, gamma, λ represent the weight coefficient to the priority value that uses every principle (1), (2), (3), (4) generation respectively, span [0,1], and when value was 0, the influence of this principle was not considered in expression.
The concrete numerical value of weight coefficient can be determined by emulation, and in network operation process so that the whole system performance optimization is a purpose, constantly adjust by network maintenance staff and network optimization engineer.The value of weight coefficient also should be according to the different rates adjustment of switching customer service, as the switching user of low rate traffic, its K
1, K
2Weight coefficient α, β can obtain big; As the switching user of high-rate service, its K
3, K
4Weight coefficient γ, λ can obtain big, so both can guarantee higher handover success rate, the resource consolidation number of times in simultaneously again can the minimizing system, reduction system complexity.
Flow process referring to enforcement shown in Figure 1 further specifies technical scheme of the present invention.
Step 10, the candidate cell that is met basic switching condition is tabulated.Measurement report according to some basic user terminals and/or base station, measurement report as signal strength signal intensity and signal quality, the candidate cell tabulation of basic switching condition, the technical scheme that this step can adopt any existing acquisition candidate cell to be adopted are satisfied in acquisition.
Step 11 is set its priority value K to 14 by the size principle of candidate cell idling-resource unit number
1(step 11) is set its priority value K according to the size principle candidate cell free time, that be the Resource Unit number of handoff reservation
2(step 22) sets priority value K according to the peaked size principle of candidate cell list time slot idling-resource unit number
3(step 23) and set priority value K according to the peaked size principle of the Resource Unit number candidate cell list time slot free time, that be handoff reservation
4(step 24).The corresponding method of setting priority value is identical in each principle, sets its priority value K with first size principle by candidate cell idling-resource unit number
1Illustrate.Suppose to have n candidate cell, with they size orderings according to idling-resource unit number, the candidate cell priority that the idling-resource unit is maximum is the highest, K
1=1, idling-resource unit many for several times candidate cell priority is inferior high, K
1=2, by that analogy, number minimum candidate cell priority in idling-resource unit is minimum, K
1=n.
Step 15 is used weighted factor according to formula (1), and beta, gamma, λ are respectively to K
1, K
2, K
3, K
4Be weighted and handle and addition, obtain the priority value of a candidate cell, by the weighted of each candidate cell, the size ordering of addition result, obtain final, prioritized candidate cell tabulation again.When only consider wherein a certain principle or during certain several principle, the weighted factor of corresponding principle be one greater than zero less than 1 value, the pairing weighted factor of principle that be not considered this moment then is zero;
Step 16 selects the highest sub-district of priority as switching target small area from prioritized candidate cell tabulation, carries out handoff procedure.If this Target cell can be admitted this switching user, then carry out channel and reshuffle, and discharge the communication link of former sub-district at this Target cell; If this switching user is not admitted by this Target cell, then from prioritized candidate cell tabulation, select priority time high Target cell to continue to attempt admitting; If all candidate cells all can not be admitted this switching user as Target cell the time, this handoff failure then, this switches user and will keep its communication link in former sub-district to continue to communicate by letter.
The inventive method in switch decision at first the measurement result by signal strength signal intensity and signal quality etc. filter out and meet the candidate cell that switches primary condition, then the statistics of hardware resources is found out the maximum sub-district of idling-resource as switching target small area by formula (1).Therefore, the present invention has adopted the criterion of signal strength signal intensity, signal quality etc. and system code channel resource situation being united judgement, according to the simple handoff algorithms of measuring that relies on, can better guarantee user's continuous communiction quality.
Claims (8)
1. the selecting method of switching target community in the TDD/CDMA system comprises: the candidate cell that obtains to satisfy basic switching condition by measurement report; Candidate cell is carried out prioritization; Press the prioritization of candidate cell, the selective sequential Target cell is carried out cell switch process, it is characterized in that:
Described candidate cell is carried out prioritization, comprising:
A. obtain the idling-resource unit number of its spread spectrum code resources of reflection of each candidate cell under each predetermined principle, and carry out prioritization by idling-resource unit number size, obtain each candidate cell each prioritization value under each predetermined principle;
B. use the weight coefficient corresponding to be weighted processing respectively to each candidate cell each prioritization value under each predetermined principle with predetermined principle;
C. the weighted result to each the prioritization value of each candidate cell under each predetermined principle gathers, and obtains the priority of each candidate cell, and the priority to each candidate cell sorts again, obtains the prioritization of candidate cell.
2. method according to claim 1 is characterized in that: the Resource Unit in the described steps A is the combination of frequency, time slot and a code channel.
3. method according to claim 2 is characterized in that: the combination of described frequency, time slot and code channel is that spreading factor is 16 o'clock each code channels on each time slot of each carrier frequency.
4. method according to claim 1 is characterized in that: the predetermined principle in the described steps A is a candidate cell idling-resource unit number; Or the Resource Unit number candidate cell free time, that be handoff reservation; Or the maximum of candidate cell list time slot idling-resource unit number; Or the candidate cell list time slot free time is the maximum of the Resource Unit number of handoff reservation; Or above-mentioned every any combination.
5. method according to claim 1, it is characterized in that: in the described steps A, the idling-resource unit number of its spread spectrum code resources of reflection of described each candidate cell is that the system information storehouse by each local resource distribution condition of preserving in the direct polling of radio network controller obtains.
6. method according to claim 1 is characterized in that: the weight coefficient among the described step B is that a span of determining by emulation is the value of [0,1].
7. method according to claim 4, it is characterized in that: among the described step B, switching user terminal for low rate traffic, to the predetermined principle of pressing candidate cell idling-resource unit number and press the candidate cell free time, for the predetermined principle of the Resource Unit number of handoff reservation, handle with big weight coefficient; For the switching user terminal of high-rate service, to the predetermined principle of pressing candidate cell list time slot idling-resource unit number with press the predetermined principle of candidate cell list time slot free time, handle with big weight coefficient for the Resource Unit number of handoff reservation.
8. method according to claim 1 is characterized in that: described step C, described gathering comprises: at the priority value that obtains according to candidate cell idling-resource unit number is K
1, corresponding weight coefficient is set at α, is set at K at the priority value that obtains according to the Resource Unit number candidate cell free time, that be handoff reservation
2, corresponding weight coefficient is set at β, and the priority value that obtains in the maximum according to candidate cell list time slot idling-resource unit number is K
3, corresponding weight coefficient is set at γ, and the priority value that obtains in the maximum according to the Resource Unit number candidate cell list time slot free time, that be handoff reservation is K
4, when corresponding weight coefficient is set at λ, Cell_Priority=α K by formula
1+ β K
2+ γ K
3+ λ K
4Calculate the priority of each candidate cell, the span of α, β, γ, λ is [0,1].
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| CN101784087A (en) * | 2009-01-16 | 2010-07-21 | 华为技术有限公司 | Method, device and system for reporting measurement report |
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| CN102480767B (en) * | 2010-11-30 | 2014-03-19 | 普天信息技术研究院有限公司 | Establishment method of adjacent cell list |
| CN102572945A (en) * | 2010-12-08 | 2012-07-11 | 中兴通讯股份有限公司 | Selection method for switching object cell and system thereof |
| WO2011144062A2 (en) * | 2011-05-23 | 2011-11-24 | 华为技术有限公司 | Method, device, control network element and system for control device access |
| CN102857981B (en) * | 2011-06-29 | 2017-09-29 | 中兴通讯股份有限公司 | A kind of method and device for realizing cell reselection |
| CN103037462B (en) * | 2011-10-09 | 2016-04-06 | 京信通信系统（中国）有限公司 | Based on cell switching method and the device of Femto framework |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535425A (en) * | 1994-03-01 | 1996-07-09 | Fujitsu Limited | Channel switching control in mobile telecommunication system |
| CN1255815A (en) * | 1999-05-21 | 2000-06-07 | 深圳市中兴通讯股份有限公司 | Switching control method based on dynamic priority in small region |
| CN1416231A (en) * | 2001-10-29 | 2003-05-07 | 华为技术有限公司 | Method for broadcasting system information wireless packed data transmission |
-
2004
- 2004-09-02 CN CNB2004100737118A patent/CN100399858C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535425A (en) * | 1994-03-01 | 1996-07-09 | Fujitsu Limited | Channel switching control in mobile telecommunication system |
| CN1255815A (en) * | 1999-05-21 | 2000-06-07 | 深圳市中兴通讯股份有限公司 | Switching control method based on dynamic priority in small region |
| CN1416231A (en) * | 2001-10-29 | 2003-05-07 | 华为技术有限公司 | Method for broadcasting system information wireless packed data transmission |
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