CN1160889C - Compresision mode control method of CDMA system - Google Patents
Compresision mode control method of CDMA system Download PDFInfo
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- CN1160889C CN1160889C CNB001277057A CN00127705A CN1160889C CN 1160889 C CN1160889 C CN 1160889C CN B001277057 A CNB001277057 A CN B001277057A CN 00127705 A CN00127705 A CN 00127705A CN 1160889 C CN1160889 C CN 1160889C
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Abstract
The present invention relates to a method for controlling the compression modes of a CDMA system. The method comprises the steps: making the repetition periods of all compression modes in a multiple relation or not in a multiple relation according to a series of measurement requirements; preplanning by adjusting the shape parameters of the corresponding compression modes to obtain a series of non-conflict compression mode combinations and form a compression mode combination set. When a system network side judges that a mobile station needs to carry out alien-frequency measurement, the system network side requests to control the compression modes and provides corresponding request values. The system is judged whether to completely satisfy the measurement requirements according to the request values and corresponding channel conditions; if the system completely satisfies the measurement requirements, one compression mode combination is selected from the compression mode combination set; when the system incompletely satisfies the measurement requirements, one optimal compression mode combination is selected from the compression mode combination set according to the principle of satisfying the measurement requirements as much as possibly. Multiple measurements without conflict are realized.
Description
Technical field
The present invention relates to a kind of CDMA (code division multiple access) system, relate in particular to a kind of method of cdma system compact model control.
Background technology
In the existing cell mobile communication systems,, make that the radio-frequency power of base station is confined within certain scope (sub-district) in the system for the utilance that improves frequency spectrum resource and the capacity of whole system.Enter the another one sub-district when travelling carriage leaves a sub-district, the signal of the original sub-district that this travelling carriage is received inevitable more and more a little less than, and its received signal that enters the sub-district will be more and more stronger just also.In order to keep the communication quality of travelling carriage, must switch to the stronger base station of signal that newly enters by original base station to continuing of this travelling carriage, the notion of switching in Here it is the cell mobile communication systems.
The strategy that switches has strategies such as network control switching, Mobile Assisted Handover, travelling carriage control switching, the strategy that initial cell mobile communication systems generally adopts network control to switch.And the system that upgrades, as GSM (global system for mobile communications), IS-95 (Narrowband CDMA) system etc. all adopts the strategy of Mobile Assisted Handover.In 3G-WCDMA (third generation-Wideband Code Division Multiple Access (WCDMA)), also adopt the strategy of Mobile Assisted Handover.
In the strategy of Mobile Assisted Handover, travelling carriage and base station are measured the quality (as received signal quality RSSI, signal interference ratio SIR or bit error rate BER etc.) of forward direction and backward channel respectively, and respectively measurement result being reported network, network based measurement result is carried out switch decision.Therefore, in the strategy of Mobile Assisted Handover, travelling carriage needs constantly to measure the quality of forward channel.
In traditional time division multiple access (TDMA) cell mobile communication systems, time slot of the general every N Time Slot Occupancy of travelling carriage communicates, and is in " free time " state at other time slot.Because general travelling carriage only has a radio-frequency transmitter, so travelling carriage can utilize these idle conditions that target frequency is measured, so that travelling carriage is to the channel conditions of network-reporting target frequency.
But, be different from tdma system, in code division multiple access (CDMA) cell mobile communication systems, neighbor cell may use identical frequency, so that carry out soft handover, and different mobile stations is also no longer divided the time slot frequency of utilization.For the travelling carriage in the cdma system, " free time " that they no longer have resembling among the TDMA comes the measurement target frequency like this.Therefore, must adopt the measurement of other method realization to target frequency.And, can't measure the signal of two different frequencies simultaneously for the travelling carriage that has only a receiver.Know the intensity of alien frequencies signal if desired, just must use downlink compression mode.
Compact model is a kind of mechanism that produces certain idle periods in radio frames, and mobile subscriber equipment can carry out inter-frequency measurement by these idle periods.Compact model is a kind of technology that is used to support the alien frequencies hard cut measurement in the cdma system.
As shown in Figure 1, in downlink compression mode, form the transmission data " slit " of a period of time by technology such as sign indicating number punchings, in this section slit, any data are not transmitted to travelling carriage in the base station.Travelling carriage can utilize this slit that its radio-frequency transmitter is transformed into the target frequency that needs supervision, and target frequency is measured.
In general, the measurement that needs during switching is all a kind of incessantly.Use under the cdma system actual conditions of compact model at all, often do not need to carry out simultaneously all measurements, but an in most cases more than certainly compact model exists.
Conflict between the so-called compact model just is meant and the slit that a plurality of compact models produce occurred in the middle of same radio frames.Exist simultaneously under the situation of many compressed mode sequence, have conflict probably.As shown in Figure 2, when two compact models existed simultaneously, the result of stack was exactly the slit that two compact models are arranged in the middle of same frame, thereby produced conflict.This conflict will cause being can not realize between system's each several part of compact model cooperation, can not realize that in the physical layer of network side mobile station side will have a plurality of measurement purposes at the same time, can not realize.
In addition, the cdma system air interface adopts frame structure to carry out the transmission of data, and the inside just is regarded as conflict if the slit of two or more compact models appears at same frame.According to general way, to the repetition period neither one constraint of compact model.Because each compact model all has cycle of a repetition, if the cycle difference, may not conflict in first cycle of beginning, but the position of repeatedly repeating latter two compact model slit will wrongly will occur conflicting to same frame the inside.As shown in Figure 3, the cycle is respectively 8 and 7, conflict all do not occur in first cycle of two compact models, but conflict just occurred at the 3rd frame of two compact models.Like this, the least common multiple between the compressed mode period will be very big.Guaranteeing not have between the compact model conflict will calculate does not exactly all have conflict in the time of whole least common multiple.Such amount of calculation will be very big, and in case after calculating conflict, will change compact model and calculate again, but also may clash, constantly calculate.As shown in Figure 4, the calculating through twice compact model conflict does not still obtain operable simultaneous compact model.The appearance that avoids conflict is a difficulty for simultaneous compressed-mode parameter is set.
Summary of the invention
The object of the present invention is to provide a kind of method of cdma system compact model control, use this method, not only avoided the conflict between the simultaneous compact model, and do not needed to carry out a large amount of calculating, avoided system effectively because the mistake that simultaneous compact model causes.
To achieve these goals, the method of a kind of cdma system compact model control provided by the present invention, comprise the following steps: according to a series of measurement requirement, make and become multiple between repetition period of each compact model or do not become the multiple relation, and by adjusting corresponding compact model form parameter, carry out pre-planning, obtain a series of compact model combinations that do not conflict, thereby obtain the compact model combination of sets; When grid side judgement travelling carriage need carry out different-frequency measure, the control of compact model was carried out in request, and provides corresponding value request; Value request and corresponding channel conditions according to the compact model request, can the judgement system satisfy measurement requirement fully: satisfy fully when system under the situation of measurement requirement, from the compact model combination of sets, select a kind of compact model combination, realize the multiple measurement that does not conflict; Not exclusively satisfy when system under the situation of measurement requirement, measure the principle that needs, from the compact model combination of sets, select a kind of optimal compact model combination, realize the multiple measurement that does not conflict according to As soon as possible Promising Policy.
In the method for above-mentioned cdma system compact model control, wherein, becoming the multiple relation can be that each compact model repetition period is identical.
In the method for above-mentioned cdma system compact model control, wherein, becoming the multiple relation can be that the maximum repetition period is the least common multiple of all repetition periods.
Adopted above-mentioned technical solution, real-time combination of selecting for use between certain compact model in the time of can measuring by needs, the real generation that avoids conflict.And avoided bigger amount of calculation, and avoided the generation of double counting, make that can obtain compact model timely when needing to measure effectively measures.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is the compressed mode frame structural representation;
Fig. 2 is the conflict schematic diagram between the compact model;
Fig. 3 is the conflict schematic diagram that repeats to cause owing to the cycle;
Fig. 4 is that the explanation schematic diagram that repeats is calculated in conflict in real time;
Fig. 5 be conflict between the identical compact model of repetition period avoid the embodiment schematic diagram;
Fig. 6 be conflict between proportional compact model of repetition period avoid the embodiment schematic diagram;
Fig. 7 becomes compact model schematic diagram to be selected for use among the embodiment of multiple the compact model combination of sets repetition period;
Fig. 8 becomes the situation schematic diagram that compact model to be selected for use occurs simultaneously among the embodiment of multiple the compact model combination of sets repetition period;
Fig. 9 becomes that 3 situation schematic diagram appears in compact model to be selected for use simultaneously among the embodiment of multiple the compact model combination of sets repetition period;
Figure 10 is the compact model schematic diagram that does not become the compact model combination of sets repetition period to be selected for use among the embodiment of multiple;
3 situation schematic diagram appears in Figure 11 simultaneously in the compact model that does not become the compact model combination of sets repetition period to be selected for use among the embodiment of multiple.
Embodiment
The present invention, promptly a kind of method of cdma system compact model control comprises the following steps:
Can satisfy in system under the situation of measurement requirement, make and become multiple between repetition period of each compact model or do not become the multiple relation, becoming the multiple relation can be that each compact model repetition period is identical, also can be that the maximum repetition period is the least common multiple of all repetition periods, and by adjusting corresponding compact model form parameter, carry out pre-planning, obtain a series of compact model combinations that do not conflict, what the compact model combination was corresponding is that one or more measure the mode that needs and realize, thereby obtains the compact model combination of sets;
When grid side judgement travelling carriage need carry out different-frequency measure, the control of compact model was carried out in request, and provides corresponding value request;
According to the value request and the corresponding channel conditions of compact model request, according to satisfy the strategy of measuring needs as far as possible, from the compact model combination of sets, select a kind of suitable compact model combination, realize multiple measurement, and do not conflict.
Referring to Fig. 5, if the cycle of simultaneous compact model is identical, adjust the compact model form parameter, promptly do not clash in first cycle, thereby avoided conflict between the identical compact model of repetition period.
Referring to Fig. 6, if the cycle of simultaneous compact model is proportional, the cycle of one of them is the least common multiple in all cycles, adjust the compact model form parameter, promptly in this cycle, do not clash, even infinite repeating down later on can not clash yet, thereby avoided the conflict between proportional compact model of repetition period.
As shown in Figure 7, be many situations that compact models use compact model combination of sets is controlled that become multiple the simultaneous repetition period.Have 4 compressed mode pattern simultaneously, the cycle is respectively 24,8,12,12.
At first, it is infeasible that 4 compact models exist simultaneously, as shown in Figure 8.Compact model 1,2,3 can exist simultaneously; Compact model 1,3,4 can exist simultaneously, as shown in Figure 9.Through similar method, the compact model combination of sets is as follows:
{{1}，{2}，{3}，{4}，{1，2}，{1，3}，{1，4}，{2，3}，?3，4}，{1，2，3}，{1，3，4}}
Can select for use as required for the combination in the combination of sets, can not clash.
As shown in figure 10, be many situations that compact models use compact model combination of sets is controlled that do not become multiple the simultaneous repetition period.Have 4 compressed mode pattern simultaneously, the cycle is respectively 24,8,12,9.
At first, it is infeasible that 4 compact models exist simultaneously, is that 9 compact model exists because the cycle is arranged.But compact model the 1,2, the 3rd, can be simultaneous, as shown in figure 11.Through similarly calculating, the compact model combination of sets is as follows:
{{1}，{2}，{3}，{4}，{1，2}，{1，3}，{2，3}，{1，2，3}}
Can select for use as required for the combination in the combination of sets, can not clash.
In sum, judge between the simultaneous compact model that needing to judge in time of several frames of least common multiple in cycle of all compact models that exist at the same time all not have to conflict through repeating not conflict of back.In order to address this problem, at first, make has a multiple relation as far as possible between repetition period of each compact model.Best situation is that the maximum repetition period is exactly the least common multiple of all repetition periods, as long as verified in the time of first maximum cycle by calculating and not clash, passes through so and repeats also can not clash like this.Two kinds of situations are arranged:, anyway repeat can not clash if the cycle of two compact models is just the same; If the cycle of two compact models becomes the multiple relation, as long as not conflict in the cycle of maximum can not clash after repeating yet.
Because the needs of measuring, perhaps can not satisfy the maximum repetition period is exactly this requirement of least common multiple of all repetition periods, at this moment still needs to carry out a large amount of calculating.The compact model number that result of calculation may cause occurring simultaneously will be restricted, and perhaps has only the combination between some compact model to be only operable.
Therefore, can be in advance to calculate between the compact model that might use, determine the combination of all possible compact model, can not clash between the inner compact model of each combination, the set that might make up be called the compact model combination of sets.Just select a kind of compact model combination for use according to measuring needs in the compact model combination of sets like this when reality is used, the principle of selecting for use is to satisfy the needs of measuring as far as possible.So promptly avoided the burden of real-time calculating, also really guaranteed avoiding of conflict simultaneously system, but also can be timely and effective, satisfy the needs of various measurements to greatest extent.
Claims (3)
1. the method for a cdma system compact model control is characterized in that, comprises the following steps:
According to a series of measurement requirement, make to become multiple between repetition period of each compact model or do not become the multiple relation, and, carry out pre-planning by adjusting corresponding compact model form parameter, obtain a series of compact model combinations that do not conflict, thereby obtain the compact model combination of sets;
When grid side judgement travelling carriage need carry out different-frequency measure, the control of compact model was carried out in request, and provides corresponding value request;
According to the value request and the corresponding channel conditions of compact model request, can the judgement system satisfy measurement requirement fully:
Satisfy fully when system under the situation of measurement requirement, from the compact model combination of sets, select a kind of compact model combination, realize the multiple measurement that does not conflict;
Not exclusively satisfy when system under the situation of measurement requirement, measure the principle that needs, from the compact model combination of sets, select a kind of optimal compact model combination, realize the multiple measurement that does not conflict according to As soon as possible Promising Policy.
2. the method for a kind of cdma system compact model control according to claim 1 is characterized in that: described one-tenth multiple relation can be that each compact model repetition period is identical.
3. the method for a kind of cdma system compact model control according to claim 1 is characterized in that: described one-tenth multiple relation can be that the maximum repetition period is the least common multiple of all repetition periods.
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| CNB001277057A CN1160889C (en) | 2000-12-05 | 2000-12-05 | Compresision mode control method of CDMA system |
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| CNB001277057A CN1160889C (en) | 2000-12-05 | 2000-12-05 | Compresision mode control method of CDMA system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1317862C (en) * | 2003-06-27 | 2007-05-23 | 联想(北京)有限公司 | A method for preventing environment mode conflict on home network |
| CN100403842C (en) * | 2004-06-07 | 2008-07-16 | 华为技术有限公司 | Method for checking effectiveness of compression mode pattern sequence |
| CN100344093C (en) * | 2004-12-16 | 2007-10-17 | 华为技术有限公司 | Downlink compression mode scheduling method |
| CN100438689C (en) * | 2004-12-21 | 2008-11-26 | 华为技术有限公司 | Method for setting up parameters in compress mode in CDMA system |
| CN100417280C (en) * | 2005-01-21 | 2008-09-03 | 华为技术有限公司 | Non-coverage switching method and system in cellular mobile communication |
| CN101087440B (en) * | 2006-06-06 | 2010-05-12 | 大唐移动通信设备有限公司 | A method for data adjustment in mobile communication system |
| DE602008001784D1 (en) * | 2008-05-08 | 2010-08-26 | Research In Motion Ltd | Method and apparatus for managing the communication of compressed mode capabilities |
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