CN1134921C - Service channel frequency distributing method for CDMA mobile communication system - Google Patents
Service channel frequency distributing method for CDMA mobile communication system Download PDFInfo
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Abstract
The present invention relates to a method for realizing the selection of frequencies where channels are positioned when the channels are allocated for the channels in a code division multiple access mobile communication system. Whether a frequency point is accessed with new service is decided according to the total load capacity on the frequency point, and loads on frequency points are balanced. The method comprises that N load threshold values from small to big are set for each of the frequency points, and N+1 priority levels from small to big are correspondingly set; a base station periodically measures the current load of each of the frequency points which are compared with the load threshold values to determine the priority levels of each of the frequency points; the base station matches the frequency point with the highest priority level for users, users which are switched onto the frequency point establish service channel with the base station; the base station counts failure numbers for the matched frequency points and adjusts the priority levels.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the resource allocation techniques in code division multiple access (CDMA) mobile communication system, promptly a kind of method of selective channel place frequency when in CDMA mobile communication system, being embodied as the traffic assignments channel.
Background technology
Along with the sharp increase of mobile communication technology field business demand amount and number of users, power system capacity is the problem that the designer very pays close attention to always.Current code division multiple access (CDMA) mobile communication system, adopt new multi-access mode, comprise and utilize orthogonal code to distinguish the user, reduce interference etc. with spread spectrum, make on limited frequency spectrum resources and can improve access customer number greatly, power system capacity no longer is subject to concrete frequency number or timeslot number, but is subject to total interference of system.In other words, make system have heap(ed) capacity, interference should be reduced to minimum, promptly consider as a whole from every side to reach the catalogue that reduces system interference.Therefore, how to reduce the important content that system interference has just become to enlarge the CDMA mobile communication system capacity.
In frequency division multiple access (FDMA) and time division multiple access (TDMA) communication system, because the co-channel interference of interchannel and adjacent interference frequently are more remarkable to the influence of power system capacity, therefore, can reduce system interference by the frequency of making rational planning for, the research of making is corresponding also more therefrom.But in cdma communication system, owing to can think that in theory the frequency reuse of CDMA is 1, be that co-channel interference can be ignored, therefore its frequency planning problem just can be simplified, and also seldom relates to the problem of further optimizing the cdma system performance by planning, dividing frequency (frequency) in corresponding engineering and the correlation technique document.Yet realistic state is: because the non-complete orthogonality of pseudo noise code, minizone with frequency exists reverse interference, therefore the frequency reuse of CDMA mobile communication system is greater than 1, promptly can not ignore the capacity when this interference shows as the capacity of neighbor cell when shared frequency and is lower than different frequent points with the interference between frequently.
Take a broad view of existing C DMA mobile communication system,, generally use a shared frequency at least in all sub-districts for the ease of realizing soft handover.Yet as previously mentioned, still have co-channel interference in the cdma communication system, many at number of users so, when amount of switched is bigger, must wish to allow the big user priority of switching possibility take this shared frequency, to reduce the direct-cut operation number of times, to reduce cutting off rate.
In the CDMA mobile communication systems, existing during for the traffic assignments channel method of selective channel place frequency be: travelling carriage is searched for all pilot signals on the shared frequency under idle condition, so that and keep in touch between the enough good base station of wireless transmission situation, and when only all pilot signals on this shared frequency all were lower than a certain threshold value, travelling carriage just can select another different frequent points (also claiming pilot frequency point) to carry out pilot signal searches.That is to say, insert, just no longer search for other frequencies as long as on current shared frequency, can realize channel.After travelling carriage is initiating on the access channel to ask, the base station will be its distribution service channel on the frequency of travelling carriage place.
In this current methods, travelling carriage is not distinguished shared frequency and different frequent points when selecting frequency, when traffic carrying capacity is big, just might allow some shared frequencies that not too needed the CU that switches, allow quick user and edge customer use pilot frequency point on the contrary, cause the phenomenon of the direct-cut operation of having in the communication process carry out again and again, limited the advantage performance of CDMA soft handover greatly.
Simultaneously, when there was a plurality of frequency the sub-district, the load of each frequency was not the same, and disturbed also big on the heavy frequency of loading.And in the current methods, travelling carriage can not independently be selected the light optimum frequency of loading, but remain on search for pilot signals on the frequency that can insert always, just keep frequency constant as long as promptly can insert, so travelling carriage just might be chosen a frequency that load is heavier, interference is bigger, and this frequency is because load is very heavy, travelling carriage provides the service of high traffic for this reason probably, even so, even this frequency can provide service, also, increase interference to other users than the transmitting power of selecting other frequencies to consume base station and travelling carriage more.
As can be seen from the above analysis, because when travelling carriage inserts, system do not carry out between frequency duty ratio, final Traffic Channel of distributing might be on the heavier frequency of load, owing to disturb big on the frequency that load weighs, just having to bigger power emission in travelling carriage and base station, has increased the interference (comprising the interference with the frequency user of this sub-district and adjacent cell) to other user of this frequency conversely again, worsened channel conditions.And other lighter frequency free time of load usefulness has not formed the wasting of resources again.Because the unavoidable idle frequency frequency not selected, that select that takes place can only insert the phenomenon that service can not be provided again, though very likely cause the situation that is free ideler frequency point that service can't be provided for the user in the sub-district when serious.Analyze above-mentioned all situations, after all, this is not carry out the overall situation when distributing frequency because of the base station to travelling carriage to weigh, and shortage is adjusted function and caused the traffic assignments inequality.
In sum, be subject to the CDMA mobile communication system of interference for a capacity, capacity depends on interference, disturbs and depends on traffic load again, therefore only under the uniform situation of Load distribution, just might make power system capacity reach maximum.
Summary of the invention
The objective of the invention is to design the method for distribution service channel frequency in a kind of CDMA mobile communication systems, it is a kind of method of selective channel place frequency when being embodied as the traffic assignments channel, solve the defective of existing method to the frequency point allocation inequality, realize optimum frequency selection, be beneficial to reduce transmitting power, reduce to disturb, be of value to the increase power system capacity.
Method of the present invention is based on that the Frequency Distribution principle of each frequency load balancing makes, and comprises according to the total load amount on the frequency deciding this frequency whether to insert new business and making load balancing on each frequency.
The technical scheme that realizes the object of the invention is such: the method for distribution service channel frequency in a kind of CDMA mobile communication systems is characterized in that comprising following logical process step:
A. be lower than fully loaded load door limit value and a descending N+1 priority be set for each frequency point setting N for N ascending load door limit value correspondence;
B. periodic measurement each frequency in base station is worked as preload, and determines the priority of each frequency when the comparative result of preload and N load door limit value according to this frequency;
C. the base station is that user of mobile station is selected to distribute the highest frequency of priority, and Traffic Channel is set up in the user of mobile station and the base station that switch on this frequency;
D. the base station reduces the priority of this frequency or bans use of this frequency when the service access failure appears in certain frequency continuously fail number statistics of the frequency of selected distribution.
In the described steps A, described frequency comprises shared frequency and non-shared frequency, when the load door limit value is set, allows the load door limit value of shared each priority of frequency all be lower than the load door limit value of non-shared each respective priority of frequency.
Described non-shared frequency is respectively less than fully loaded 50%, fully loaded 50-70%, fully loaded 70-90%, fully loaded 90-95% at the load door limit value, and during greater than fully loaded 95%, pairing priority is respectively 1 to 5 grade; Described shared frequency is respectively less than fully loaded 40%, fully loaded 40-60%, fully loaded 60-80%, fully loaded 80-90% at the load door limit value, and during greater than fully loaded 90%, pairing priority is respectively 1 to 5 grade.
Among the described step B, periodic measurement each frequency in base station is worked as preload, comprises the forward signal load and reverse signal load of measuring each frequency; The priority of determining each frequency comprises the priority of definite forward signal load and the priority of reverse signal load; Load is the ratio of forward direction signal load priority and reverse signal load priority on this frequency on certain frequency.
Describedly working as preload by each frequency of base station periodic measurement, is forward signal load and reverse signal load by each frequency of base station transceiver periodic measurement, and the reporting base station controller; Carrying out priority by base station controller again judges.
The forward signal of described frequency load is that the ratio with the total transmitting power of base station on this frequency and the maximum transmission power of base station is a foundation; The reverse signal of described frequency load is to be foundation with base station received total interference volume (RSSI) on this frequency.
Described is foundation with base station received total interference volume (RSSI) on this frequency, is to utilize formula 1/ (1-M/M
Max) the calculating acquisition, M is the current mobile station number of users of this frequency, M
MaxIt is the supported maximum user of mobile station number of this frequency.
Described step C, the base station is that user of mobile station is selected to distribute the highest frequency of priority, is the preferential high frequency of priority of selecting to distribute the forward signal load; When the priority of the forward signal of two frequencies load is identical, the then preferential high frequency of priority of selecting to distribute the reverse signal load.
Among the described step C, the base station is that user of mobile station is selected to distribute the highest frequency of priority, also comprises the selection distribution of carrying out shared frequency and non-shared frequency according to the type of user of mobile station.
The judgement of described user of mobile station type, further comprise: monitor Reverse Access Channel by base station controller, during call initiation message when page-response message when receiving that user of mobile station is exhaled or user of mobile station master exhale, carry out the type of this user of mobile station according to pilot signal strength and pilot tone rate of fading and judge.
Describedly carry out the user of mobile station type according to pilot signal strength and pilot tone rate of fading and judge, comprising: the thresholding that pilot signal strength and pilot tone rate of fading are set respectively; Pilot signal strength is reported by user of mobile station, and the base station calculates the pilot tone rate of fading of reflection pilot signal variable quantity and rate of change according to the pilot signal strength that reports continuously; Compare with default pilot signal strength thresholding and pilot tone rate of fading thresholding; The user of mobile station that satisfies any thresholding is judged to be the switch type user, otherwise is resident type user.
Describedly user of mobile station is judged to be the switch type user or for resident type user, also comprises with parameter Tuser being 0 or being 1 to represent that respectively it is the switch type user or is resident type user.
The selection that described type according to user of mobile station is carried out shared frequency and non-shared frequency distributes, further comprise: when shared frequency and non-shared frequency are in same priority, for the switch type user of mobile station preferentially selects to distribute shared frequency, when the priority of shared frequency is hanged down, select at random to distribute the highest frequency of all the other priority, resident type user of mobile station preferentially selects to distribute non-shared frequency; In the priority of shared frequency and non-shared frequency not simultaneously, switch type or resident type user of mobile station all preferentially do not select to distribute the highest frequency of priority.
Among the described step D, the base station also comprises service fail number and two parameters of service fail threshold number are set to fail number statistics of the frequency of selected distribution.
Among the described step D, when appearring in certain frequency continuously, the service access failure reduces the priority of this frequency, further comprise: the every failure of service access once or call drop once, the service fail number is added 1, and at the service fail number during, the priority of corresponding frequency is reduced one-level greater than the service fail threshold number.
Described priority with corresponding frequency reduces the priority reduction one-level that one-level comprises that the priority that the forward signal of this frequency is loaded reduces one-level and the reverse signal of this frequency is loaded.
Realize the method for distribution service channel frequency in the CDMA mobile communication systems of the present invention, it is characterized in that it being may further comprise the steps:
A. periodic measurement each frequency in base station is worked as preload, comprises forward signal load and reverse signal load;
B. determine the priority of each frequency forward signal load and the priority of reverse signal load;
C. the base station determines that it is switch type user or resident type user to the user of mobile station that inserts;
D. the highest shared frequency of priority is selected for the switch type user in the base station, for resident type user selects the highest non-shared frequency of priority;
E. the base station is the Traffic Channel on the user the distributes selected frequency;
F. the priority of selected frequency is upgraded in the base station according to the service fail number of times.
Of the present invention in CDMA mobile communication systems the method for distribution service channel frequency, it is a kind of frequency allocation method based on load balancing, this method has also been taken into account soft handover for the convenience of the user simultaneously, treat shared frequency and different frequent points with a certain discrimination, distribute technology such as frequency by user's switching probability size.Comprise:, when being user's distribution service channel, carrying out frequency according to reverse load before the frequency and select for realizing frequency load balancingization; For making things convenient for soft handover to realize, reduce the direct-cut operation number of times, be preferably the big user of switching probability and distribute shared frequency; Judge that the frequency load comprises forward direction load and reverse load, ratio and the suffered total interference volume with the total transmitting power of base station on a certain frequency and maximum transmission power is foundation respectively; With the method for judging priority according to the frequency load, and this priority, need constantly to adjust according to the call completion rate after the frequency actual allocated.
Of the present invention in CDMA mobile communication systems the method for distribution service channel frequency, its algorithm is realized simple, can combine closely with agreement, is convenient to realize.Compare with existing algorithm, can make frequency load balancingization, reduce base station and transmission power of mobile station, reduce to disturb, increase power system capacity, reduced the possible number of times of direct-cut operation in addition, optimized systematic function from principle analysis.
Description of drawings
Fig. 1 is the system architecture diagram that adopts the CDMA mobile communication system of the inventive method.
Fig. 2 is that the inventive method is carried out the process flow block diagram that frequency is selected distribution.
Embodiment
Below in conjunction with a CDMA2000 mobile communication system, further specify technology of the present invention by embodiment and accompanying drawing.
Referring to Fig. 1, the CDMA mobile communication systems shown in the figure adopts the frequency allocation plan based on load balancing.Comprise a travelling carriage 20 and a base station 10.Wherein, travelling carriage 20 comprises a transreceiver, base station 10 comprises that several (being assumed to be 3) transreceivers (claim base station transceiver again, include the frequency processing unit) 101,102,103, be operated in respectively on 3 frequency f1, f2, the f3, and to establish shared frequency be f1, and each frequency can support a plurality of users to insert.104 is base station controllers among the figure, the 105th, and mobile switching centre.System works comprise travelling carriage 20 to the base station 10 reverse link and by the forward link of base station 10 to travelling carriage 20, a certain frequency could insert new business and depend on total load amount on this frequency.
In conjunction with referring to Fig. 2, the process of system assignment Traffic Channel frequency is:
Step 21, each frequency load of periodic measurement, base station transceiver 101 to 103 is the cycle with Tch, periodically measures reverse signal intensity RSSI (reverse load of reflection frequency) Rload1-Rload3 that the travelling carriage 20 on the frequency f1-f3 reports and the forward direction load Fload1-Fload3 of corresponding frequency f1-f3.Base station transceiver 101 to 103 reports base station controller 104 with load Fload1-Fload3 of the forward direction on the f1-f3 frequency that records and reverse load Rload1-Rload3, carries out priority by base station controller 104 and judges.
Measure on each frequency and load, should take all factors into consideration its preceding, reverse load, wherein, weighing the forward direction load can be foundation at the ratio of total transmitting power of a certain frequency and maximum transmission power with above-mentioned base station, is expressed as: forward direction load Fload=forward emitting power/base station gross power; Weighing reverse load can be foundation at total interference volume (RSSI) that a certain frequency receives with above-mentioned base station, and can be expressed as: reverse load Rload=RSSI=1/ (1-M/Mmax), M are active user's number, and Mmax is supported maximum number of user.
Periodic measurement is carried out to each frequency load in above-mentioned base station always, and measuring object comprises a forward direction and a reverse load on the frequency.
It should be noted that in the third generation (3G) CDMA mobile communication systems asymmetric forward direction load weight, the reverse load light (when downloading big speed ratio data service simultaneously) of being usually expressed as of load as a plurality of users; Simultaneously professional itself normally before, reverse traffic amount quite (as speech business) or forward direction ratio inverse traffic carrying capacity big (as the data business), so should be bottleneck when considering the frequency load with the forward direction load.
Step 22, determine each frequency priority, base station controller 104 is according to the corresponding relation between predefined frequency load and priority, forward direction load Fload1-Fload3 on the f1-f3 frequency that base station controller 104 is reported carries out priority with reverse load Rload1-Rload3 and judges, obtains forward direction frequency priority Fpri and reverse frequency priority Rpri respectively.
The concrete practice that each frequency priority is judged is:
When the preceding reverse load of a frequency is lower than the first threshold T h1, then this frequency priority is made as 1, when the preceding reverse load of a frequency is lower than the second threshold T h2 but is higher than the first threshold T h1, then this frequency priority is made as 2, and the like.Can be provided with N thresholding, (N+1) individual priority-level is just arranged accordingly.Hypothesis has 4 thresholdings herein, 50% (Th1) when being full load respectively, and 70% (Th2), 90% (Th3), 95% (Th4), 5 corresponding priority level values are respectively 1 to 5 from high to low.Because shared frequency f1 is used for soft handover more, and should be the adjacent cell soft handover and reserve more shared frequency resource, therefore shared frequency f1 priority decision threshold is chosen as fully loaded 40% (Th1) respectively, 60% (Th2), 80% (Th3), 90% (Th4).Corresponding shared frequency f1 and pilot frequency point f2, f3, five kinds of rank: G1 of each frequency priority generation (the frequency load＜Th1), G2 (Th1＜frequency load＜Th2), G3 (Th2＜frequency load＜Th3), G4 (Th3＜frequency load＜Th4), G5 (the frequency load＞Th4).
Because preceding reverse frequency is a symmetry uses, a frequency must all be no more than certain thresholding at the load on the preceding reverse link again, could the access business when oppositely all allowing access service before promptly.So weighing the frequency load, also must take all factors into consideration preceding reverse load when judging priority.So preceding, the reverse load of a frequency now respectively have a priority value.As described above under the situation, when weighing a certain frequency load, judging that its priority is that G4 (during Th3＜frequency load＜Th4), should call out and do not enter and switch access; When weighing a certain frequency load, judging that its priority is that G5 (during frequency load＞Th4), should carry out business and not enter.
Each frequency load (comprising shared frequency load and pilot frequency point load), its forward direction load Fload is this frequency load with the ratio of reverse load Rload, and the corresponding relation between priority can be shown in following table:
| The load value that records | Priority 1 | Priority 2 | Priority 3 | Priority 4 | Priority 5 |
| Fload/Rload (different frequent points) | ＜50％ | 50-70％ | 70-90％ | 90-95％ | ＞95％ |
| Fload/Rload (shared frequency) | ＜40％ | 40-60％ | 60-80％ | 80-90％ | ＞90％ |
Step 23 inserts user of mobile station, and base station controller 104 is being monitored Reverse Access Channel always, if travelling carriage 20 makes a call, the pilot tone of selecting during then according to its idle condition is oppositely sending call initiation message on (enhancing) access channel; If travelling carriage 20 is called out, then above-mentioned base station 10 is issuing page message on forward direction (fast) paging channel, travelling carriage 20 is being monitored forward direction (fast) paging channel always simultaneously, judge whether beep-page message conforms to the address of oneself, if conform to, then travelling carriage 20 reports page-response message through after necessarily handling on Reverse Access Channel, if be not inconsistent, then continue to carry out until conforming to.
Base station controller 104 is after receiving the page-response message or travelling carriage 14 main call initiation message of exhaling that travelling carriage 14 is exhaled, carry out the judgement of user of mobile station type according to pilot frequency intensity and pilot tone rate of fading earlier, judge that user of mobile station is switch type user or resident type user, and represent that with parameter Tuser (the switch type user is meant the new user who makes a call herein, represent that the probability that after this this user switch is bigger, be different from the user who is in the handoff procedure).Be the switch type user then parameter Tuser be 1, be resident type user then parameter Tuser be 0.
So-called switch type user of mobile station refers to the bigger user of the probability that switches, through rough analysis, can think that the switch type user is the imperfect user of mobile station of connection status of present and reference base station Radio Link, be the lower user of pilot frequency intensity, or fast moving and moving direction be away from the user of mobile station of current base station, and the patterns available rate of fading characterizes.
Concrete judgement can realize by two threshold values are set, one is the thresholding (Pilot_stre_th) of declaring pilot signal strength, another is a thresholding (Pilot_chanrate_th) of declaring the pilot tone rate of fading, judging it is fast moving type user among the switch type user with the thresholding of pilot tone rate of fading, is peripheral type user among the switch type user with the thresholding judgement of pilot signal strength.When any one thresholding in satisfied (or reaching) two thresholdings, just can be judged to switch type user, Tuser=1; Otherwise be resident type user Tuser=0.
Pilot frequency intensity can be reported by travelling carriage; The pilot tone rate of fading should be in the certain hour scope (when inserting attitude), the pilot frequency intensity several times that reports continuously according to travelling carriage, (BTS) calculates pilot tone variable quantity and rate of change by base station controller, draw after comparing with the thresholding of default pilot tone rate of fading, the unit of measured value can be dB/ms again.
Step 24 is to step 27, be the mobile station in selecting frequency, base station controller 104 is that the load condition of parameter Tuser and each frequency is priority Fpri/Rpri according to the result of determination of user of mobile station type, for user of mobile station is selected frequency, select target is to select the highest frequency f of priority for this user of mobile station, and selection principle is:
If the user of mobile station type is switch type Tuser=1 (fast moving user or an edge customer), in the highest frequency of priority preferential select shared frequency point allocation it, if shared frequency priority is lower, select the highest frequency point allocation of all the other priority it (step 24, step 25, step 27) at random; Correspondingly, if the user of mobile station type is resident type Tuser=0 (non-fast moving user or an edge customer), preferentially selecting non-shared frequency for use is that pilot frequency point is distributed it, and reserves shared frequency (step 26); Only when shared frequency and other frequencies are in same priority, then preferentially select shared frequency for use,, then select the highest frequency of priority earlier for use if the priority of shared frequency and other frequencies is different according to user type.
When determining priority according to load, because the preceding reverse load of each frequency respectively has a priority, select the higher frequency of forward direction priority during for the traffic assignments frequency, if two frequency forward direction priority are identical, then select the higher frequency of reverse priority for use.
Step 28, for user of mobile station distributes Traffic Channel on the selected frequency, base station controller 12 is handed down to travelling carriage 20 with the frequency of selecting by FCCH, travelling carriage 20 is switched on this frequency by base station controller 104 appointments, on corresponding this frequency, setting up Traffic Channel with base station transceiver then.
Step 29 is upgraded priority according to the service fail number of times, and base station controller 104 is adjusted the priority of this selected frequency according to the service access success or not after the frequency point allocation.Comprise: service access failure once or call drop once, then sign Cfail is done to add 1 and handles Cfail=Cfail+1; In the certain hour, if this sign Cfail is greater than a thresholding sign Thfail, Cfail＞Thfail, priority value Fpri/Rpri that then should the correspondence frequency falls 1 grade, i.e. Fpri/Rpri=Fpri/Rpri+1.The priority value of each frequency should be upgraded according to the periodic measurement result.Can characterize by parameter is set during enforcement: comprise service fail number and service fail thresholding, can be expressed as Ser_fail_num and Ser_fail_th respectively.
The service fail number of times is the service access frequency of failure that the reason owing to non-access parts such as hardware, networks causes, or algorithm is inconsiderate, it is excessive unexpected Zone load to occur, the professional situation that can't insert, in a word, the statistical service failure number line frequency point priority update of going forward side by side is to distribute for the mistake that remedies and correct frequency, and after this possibility of assignment error appears in reduction again.
If certain frequency service fail occurs for several times continuously, can note, reduce this frequency priority on the one hand even ban use of communication failure once more behind the access service after avoiding; But the detection trigger part checks whether the parts such as channel processor of this frequency occur unusually on the other hand.
When implementing method of the present invention, need to require base station transceiver to increase by two measured values again on the basis of existing CDMA mobile communication system design: pilot drop speed and service fail number and requirement are provided with the frequency load measurement cycle in background data base.
Claims (16)
1. the method for distribution service channel frequency in the CDMA mobile communication systems is characterized in that comprising following logical process step:
A. be lower than fully loaded load door limit value and a descending N+1 priority be set for each frequency point setting N for N ascending load door limit value correspondence;
B. periodic measurement each frequency in base station is worked as preload, and determines the priority of each frequency when the comparative result of preload and N load door limit value according to this frequency;
C. the base station is that user of mobile station is selected to distribute the highest frequency of priority, and Traffic Channel is set up in the user of mobile station and the base station that switch on this frequency;
D. the base station reduces the priority of this frequency or bans use of this frequency when the service access failure appears in certain frequency continuously fail number statistics of the frequency of selected distribution.
2. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 1, it is characterized in that: in the described steps A, described frequency comprises shared frequency and non-shared frequency, when the load door limit value is set, allow the load door limit value of shared each priority of frequency all be lower than the load door limit value of non-shared each respective priority of frequency.
3. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 2, it is characterized in that: described non-shared frequency, be respectively less than fully loaded 50%, fully loaded 50-70%, fully loaded 70-90%, fully loaded 90-95% at the load door limit value, and during greater than fully loaded 95%, pairing priority is respectively 1 to 5 grade; Described shared frequency is respectively less than fully loaded 40%, fully loaded 40-60%, fully loaded 60-80%, fully loaded 80-90% at the load door limit value, and during greater than fully loaded 90%, pairing priority is respectively 1 to 5 grade.
4. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 1, it is characterized in that: among the described step B, periodic measurement each frequency in base station is worked as preload, comprises the forward signal load and reverse signal load of measuring each frequency; The priority of determining each frequency comprises the priority of definite forward signal load and the priority of reverse signal load; Load is the ratio of forward direction signal load priority and reverse signal load priority on this frequency on certain frequency.
5. according to the method for distribution service channel frequency in claim 1 or the 4 described a kind of CDMA mobile communication systems, it is characterized in that: describedly work as preload by each frequency of base station periodic measurement, be forward signal load and reverse signal load by each frequency of base station transceiver periodic measurement, and the reporting base station controller; Carrying out priority by base station controller again judges.
6. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 4 is characterized in that: the forward signal of described frequency load is that the ratio with the total transmitting power of base station on this frequency and the maximum transmission power of base station is a foundation; The reverse signal of described frequency load is to be foundation with base station received total interference volume on this frequency.
7. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 6 is characterized in that: described is foundation with base station received total interference volume on this frequency, is to utilize formula 1/ (1-M/M
Max) the calculating acquisition, M is the current mobile station number of users of this frequency, M
MaxIt is the supported maximum user of mobile station number of this frequency.
8. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 1, it is characterized in that: described step C, the base station is that user of mobile station is selected to distribute the highest frequency of priority, is the preferential high frequency of priority of selecting to distribute the forward signal load; When the priority of the forward signal of two frequencies load is identical, the then preferential high frequency of priority of selecting to distribute the reverse signal load.
9. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 2, it is characterized in that: among the described step C, the base station is that user of mobile station is selected to distribute the highest frequency of priority, also comprises the selection distribution of carrying out shared frequency and non-shared frequency according to the type of user of mobile station.
10. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 9, it is characterized in that: the judgement of described user of mobile station type, further comprise: monitor Reverse Access Channel by base station controller, during call initiation message when page-response message when receiving that user of mobile station is exhaled or user of mobile station master exhale, carry out the type of this user of mobile station according to pilot signal strength and pilot tone rate of fading and judge.
11. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 10, it is characterized in that: describedly carry out the user of mobile station type according to pilot signal strength and pilot tone rate of fading and judge, comprising: the thresholding that pilot signal strength and pilot tone rate of fading are set respectively; Pilot signal strength is reported by user of mobile station, and the base station calculates the pilot tone rate of fading of reflection pilot signal variable quantity and rate of change according to the pilot signal strength that reports continuously; Compare with default pilot signal strength thresholding and pilot tone rate of fading thresholding; The user of mobile station that satisfies any thresholding is judged to be the switch type user, otherwise is resident type user.
12. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 11, it is characterized in that: describedly user of mobile station is judged to be the switch type user or for resident type user, also comprises with parameter Tuser being 0 or being 1 to represent that respectively it is the switch type user or is resident type user.
13. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 9, it is characterized in that: the selection that described type according to user of mobile station is carried out shared frequency and non-shared frequency distributes, further comprise: when shared frequency and non-shared frequency are in same priority, for the switch type user of mobile station preferentially selects to distribute shared frequency, when the priority of shared frequency is hanged down, select at random to distribute the highest frequency of all the other priority, for resident type user of mobile station preferentially selects to distribute non-shared frequency; In the priority of shared frequency and non-shared frequency not simultaneously, switch type or resident type user of mobile station are all preferentially selected the highest frequency of priority for use.
14. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 1, it is characterized in that: among the described step D, the base station also comprises service fail number and two parameters of service fail threshold number are set to fail number statistics of the frequency of selected distribution.
15. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 1, it is characterized in that: among the described step D, when appearring in certain frequency continuously, the service access failure reduces the priority of this frequency, further comprise: the every failure of service access once or call drop once, the service fail number is added 1, and at the service fail number during, the priority of corresponding frequency is reduced one-level greater than the service fail threshold number.
16. the method for distribution service channel frequency in a kind of CDMA mobile communication systems according to claim 15, it is characterized in that: described priority with corresponding frequency reduces the priority reduction one-level that one-level comprises that the priority that the forward signal of this frequency is loaded reduces one-level and the reverse signal of this frequency is loaded.
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| CNB011096497A CN1134921C (en) | 2001-03-14 | 2001-03-14 | Service channel frequency distributing method for CDMA mobile communication system |
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| CNB011096497A CN1134921C (en) | 2001-03-14 | 2001-03-14 | Service channel frequency distributing method for CDMA mobile communication system |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100964670B1 (en) * | 2003-05-12 | 2010-06-22 | 엘지전자 주식회사 | Method of generating data rate control bit in a mobile communication system |
| CN100544510C (en) * | 2003-09-07 | 2009-09-23 | 中兴通讯股份有限公司 | Load balance control method between the frequency when initially inserting in the broadband CDMA system |
| CN100359987C (en) * | 2004-08-17 | 2008-01-02 | 中兴通讯股份有限公司 | Method for carrying out orientation entity switch in continuous orientation |
| CN100417287C (en) * | 2005-03-03 | 2008-09-03 | 中兴通讯股份有限公司 | Positioning entity switching method when continuous positioning |
| CN101193413B (en) * | 2006-11-22 | 2010-07-28 | 大唐移动通信设备有限公司 | A multi-network mode switching method and its communication device |
| CN101198142B (en) * | 2006-12-06 | 2010-06-09 | 中兴通讯股份有限公司 | Load equalization method among frequency points of N frequency point cell |
| CN101242623B (en) * | 2007-02-08 | 2011-03-16 | 大唐移动通信设备有限公司 | Wireless resource managing method, wireless network controller and base station |
| CN101304594B (en) * | 2007-05-11 | 2011-11-30 | 电信科学技术研究院 | Management method and scheduling machine for wireless resource |
| CN101500269B (en) * | 2008-02-02 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for selecting multi-carrier high-speed downlink packet access frequency point |
| CN101754290A (en) * | 2008-12-18 | 2010-06-23 | 中兴通讯股份有限公司 | Community switching method, device and system based on MUROS technology |
| CN101873709B (en) | 2010-06-30 | 2013-06-26 | 华为技术有限公司 | Method, equipment and system for assigned calling |
| CN102065564B (en) * | 2010-12-22 | 2014-04-30 | 中兴通讯股份有限公司 | Method and device for improving access success rate of terminal in mobile communication system |
| CN103442439B (en) * | 2013-08-30 | 2016-06-22 | 哈尔滨海能达科技有限公司 | The method of PDT system, terminal, base station and acquisition or reporting orientation information |
| CN107396451B (en) * | 2016-05-16 | 2020-08-28 | 普天信息技术有限公司 | Method and device for adjusting resources among cells in same system |
| CN107426778B (en) * | 2017-07-27 | 2020-03-10 | 深圳市盛路物联通讯技术有限公司 | Selection method for frequency point switching and access equipment |
| CN107592657B (en) * | 2017-07-29 | 2020-04-14 | 深圳市盛路物联通讯技术有限公司 | Frequency point switching control method and terminal equipment |
| CN116054937B (en) * | 2023-03-31 | 2023-06-23 | 中国电子科技集团公司第五十四研究所 | Dual-frenquency point common aperture laser communication system |
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