CN1698389A - Method and system for avoiding power outages at the base station in cellular system using variable rate transmission - Google Patents
Method and system for avoiding power outages at the base station in cellular system using variable rate transmission Download PDFInfo
- Publication number
- CN1698389A CN1698389A CN 03811072 CN03811072A CN1698389A CN 1698389 A CN1698389 A CN 1698389A CN 03811072 CN03811072 CN 03811072 CN 03811072 A CN03811072 A CN 03811072A CN 1698389 A CN1698389 A CN 1698389A
- Authority
- CN
- China
- Prior art keywords
- transmission
- transmission power
- power requirements
- time slot
- transmission channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The present invention discloses a method and system for discarding the least amount of data in case a power outage is expected to occur in some timeslot during a future frame. The present invention discloses using Base Station (BS) information on the power transmitted during the last frame, along with information on the total amount of data, and the priority assigned thereto, that the BS has to transmit during upcoming frames, to make decisions on the type and quantity of data that should be removed to avoid severe power outage in the upcoming frames.
Description
Technical field
The relevant wireless communication field of the present invention.Particularly, the present invention is relevant in downlink transfer, utilizes the third generation cell phone system of variable rate transmission.
Background technology
The third generation (3G) cell phone system can use radio network controller (RNC) and base station (BS).Wherein, the flow (downlink transfer) that is sent to the user via core network is the base station (BS) that utilizes radio network controller (RNC) to route to given user's optimal service can be provided.For given user, the data that are sent to base station (BS) via radio network controller (RNC) can be divided into several transmission channels (DCH), and each transmission channel (DCH) all can have the feature of type of coding (coding type), speed (rate), interleave (interleaving).Base station (BS) is the transport block data of periodically collecting radio network controller (RNC), each transmission channel (DCH) is implemented the data of suitable coding and interleave, the different transmission channels of multitask (DCH) and data are transferred out via suitable physical channel (DPCH).Physical channel (DPCH) is to utilize spreading codes (spreading code) to reach, and under the situation of discontinuous transmission (time division duplex (TDD)), time slot is defined.
For given user, power at given physical channel (DPCH) transmission signals is to depend on Several Factors, such as the path loss (path loss) in the middle of: user and the base station, interference level that the user discovers, and the signal-to-jamming ratio (SIR) that needs of satisfied transmission.For given user, during the signal-to-jamming ratio (SIR) that given physical channel (DPCH) needs can depend on the special time cycle (news frame), desire via different transmission channels (DCH) data quantity transmitted.This data volume can be called transformat combination (TFC).
When signal-to-jamming ratio (SIR) when changing up or down, the user just can utilize uplink transport channel, periodically requires base station (BS) to adjust its power downward or upward.Base station (BS) can determine whether to satisfy user's requirement.In given time slot, the whole power that transmit all physical channels (DPCH) can not surpass certain threshold.If base station (BS) is found certain situation and may violate certain threshold that then base station (BS) just needs to reduce the power (reducing identical relative quantity respectively) of each physical channel (DPCH), so as to avoiding surpassing certain threshold.This situation is to be called interruption in power (power outage).
Crowded (congestion) is the general name of following situation, that is: base station (BS) can't transmit all satisfactorily and be sent to each user of connection base station (BS) or the data of user's equipment (UE) via radio network controller (RNC).This is to lead because of in the deficiency of hardware resource, processing power or through-put power.For a kind of mechanism is provided, so as to allowing the base station (BS) can be in the situation of crowded (congestion), priority between scheduled transmissions channel (DCH), radio network controller (RNC) is understood at each transmission channel (DCH) assigned priority, that is: news frame processing priority (FHP).News frame processing priority (FHP) are to utilize radio network controller (RNC) to assign and transfer to base station (BS), so as to most of significant data all can successfully be passed through in the situation of crowded (congestion).
Yet this method also can't be pointed out: should abandon the how low data of priority, so as to guaranteeing serious interruption in power (power outage) can not take place.In view of this, the present invention just proposes a kind of method and system, and it considers the power demand and the news frame processing priority (FHP) of transmission data simultaneously, so as in the situation of crowded (congestion), abandons amount of data optimal.
Summary of the invention
The purpose of this invention is to provide a kind of method and system,, avoid the interruption in power (power outage) of base station so as in utilizing the cell phone system of variable rate transmission.In the situation that crowded (congestion) takes place, the present invention can consider the power demand and the news frame processing priority (FHP) of data, so as to abandoning amount of data optimal.
According to an aspect of the present invention a kind of in order to avoid in utilizing the cell phone system of variable rate transmission, the method of the interruption in power of one base station, this method comprises the following steps: A) calculate at least one following news frame, the transmission power requirements prediction of each time slot; B) identification has the time slot greater than a transmission power requirements of a predetermined critical; C) select time slot with maximum transmission power demand; D) discern the transmission channel of this selected time slot; E) at first by increase news frame processing priority, secondly by reducing related transmission power, with this identification transmission channel that sorts; F) apply a label, and it is temporarily to represent: the data that apply in the transmission channel of this label will be abandoned, and according to the order of this transmission channel that sorted, recomputate this transmission power requirements prediction of this selected time slot of each identification transmission channel, be equal to or less than a predetermined critical up to this transmission power requirements prediction; G) according to the reverse order of this transmission channel that sorted, temporarily remove this label that each transmission channel had before applied, and after each continuous label is removed, recomputate this transmission power requirements prediction, whether can make this transmission power requirements prediction surpass this predetermined critical so as to the removal that determines any label; And H) data that suppress any transmission channel transmit, if the label removal of this any transmission channel can make this transmission power requirements prediction surpass this predetermined critical.
According to a further aspect of the invention a kind of in order to avoid system in the interruption in power of the cell phone system that utilizes variable rate transmission, this system comprises: an A) radio network controller, wherein, data are sent to a base station at least one user; B) wherein, the data that are sent to this base station by this radio network controller are to be assigned a news frame processing priority and to be separated into the transmission channel of videoing to physical channel, and are sent to this at least one user; And C) this base station is the time slot of predicting greater than a transmission power requirements of a predetermined critical that has of interrogating frame at least one future in order to discern, and according to this predetermined critical, and this transmission power requirements prediction of each identification time slot of optimization.
Understand purpose of the present invention, characteristics and advantage for making clear, preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a kind of method flow diagram of avoiding the interruption in power (poweroutage) of base station according to preferred embodiment of the present invention.
Fig. 2 is a kind of system block diagrams of abandoning amount of data optimal in the situation that crowded (congestion) takes place according to preferred embodiment of the present invention.
Embodiment
During the present invention is to use last news frame, the transmission power information of relevant base station (BS), and follow-up news frame during, base station (BS) must the transmission the total data amount, so as to decision data type and the quantity that should abandon, and then avoid the serious interruption in power (power outage) of follow-up news frame.This not only allows base station (BS) can determine the data that abandon, and can also determine the quantity that abandon.In addition, in decision process, base station (BS) is also considered the news frame processing priority (FHP) of data simultaneously.Abandon in the data conditions at needs, the present invention abandons data and minimizes the data volume that abandon according to priority, so as to avoiding interruption in power (power outage).
As discussed previously, for specific user, the data that are sent to base station (BS) via radio network controller (RNC) can be divided into several transmission channels (DCH).The data that transmit via one group of transmission channel (DCH) then can multitask to the mixed transport channel (CCTrCH) of encoding.Coding mixed transport channel (CCTrCH) is to transmit on the given number physical channel (DPCH) that this coding mixed transport channel (CCTrCH) is provided with.In given news frame, physical channel (DPCH) number that coding mixed transport channel (CCTrCH) uses be depend on this news frame during, need data quantity transmitted.
After the data of abandoning transmission channel (DCH), for given user, physical channel (DPCH) number of supporting transfer of data to need also can reduce.If selected time slot no longer needs part physical channel (DPCH), then transmission power requirements (the P of this selected time slot
S; n) also can reduce.In view of this, the present invention must the amount of commenting label remove different transmission channels (DCH) combination of data will be to the transmission power requirements (P of selected time slot
S; n) cause any effect.In addition, the transmission power requirements (P of selected time slot
S; n) can also recomputate and with the predetermined critical (P of expression maximum admissible through-put power
Thr) compare, suppose that the data of each transmission channel (DCH) alternately all can be transmitted and be abandoned.This allows base station (BS) can select to transmit/abandon transmission channel (DCH) combination of selected time slot, so as to obtaining the amount of data optimal that abandon and guaranteeing the transmission power requirements (P of selected time slot
S; n) can not surpass predetermined critical (P
Thr).
Can handle at base station (BS) (that is: coding (code), interleave (interleave), and multitask (multiplex)) and transmit the data of transport channel (DCH) before, base station (BS) must receive the data of radio network controller (RNC) in advance and with data buffering to be used for the transmission during frame is interrogated in n of back, wherein, n is the news frame number of transmission channel (DCH) interleave.The corresponding cycle is commonly referred to Transmission Time Interval (TTI), and it will change along with transmission channel (DCH) according to the characteristic of carrying data.So, the data of given transmission channel (DCH) just can cushion and transmit once every n news frame.
Interrogate in frame at each, base station can reach the through-put power of using at present based on the data that different transmission channels (DCH) tendency to develop is failed, so as to predicting that the next one is interrogated in frame or the following several news frames (if needs), the transmission power requirements (P of each time slot
S; n).If base station (BS) is according to transmission power requirements (P
S; n) and predetermined critical (P
Thr) relatively decision: the specific time slot of next news frame has the material risk of interruption in power (poweroutage), and then this time slot will be selected the further amount of commenting.That is to say that base station (BS) will be observed the buffered data of scheduled transmissions in the next one (following several) the news frame and abandon the data of part transmission channel (DCH), so as to allowing the transmission power requirements (P of influenced time slot and news frame
S; n) can not surpass predetermined critical (P
Thr).This predetermined critical (P
Thr) can adjust, so as to making this method rarer aggressiveness is arranged.
In order to calculate the transmission power requirements (P of following news frame
S; n), we must suppose or know following message:
For interrogating frame future, the through-put power of each physical channel (DPCH) of each coding mixed transport channel (CCTrCH).
During interrogate frame future, each the coding mixed transport channel (CCTrCH) transformat combination (TFC) because transformat combination (TFC) can determine to use the number of physical channel (DPCH).
Yet each uses the through-put power of physical channel (DPCH) and can't accurately know, even just next news frame.Therefore, the inventive method will be utilized ground floor control, that is: the ground floor (Layer1) of base station (BS), the up-to-date through-put power of report is so as to calculating the transmission power requirements (P of any following news frame
S; n) prediction.The up-to-date through-put power of ground floor control report is preferably interrogated the through-put power of frame or preceding news frame (if information can't in time obtain) use at present.
For instance, the transmission power requirements (P of time slot s
S; n) can calculate according to following equation:
Wherein, g (k, s; N) the hypothesis through-put power of physical channel (DPCH) during news frame n be among the time slot s, coding mixed transport channel (CCTrCH) k using; N
kThe person's of being to use number; c
k(n) be the expection transformat combination (TFC) of coding mixed transport channel (CCTrCH) k during news frame n; d
k(n) be to be illustrated in whether to expect during the news frame n and transmit special Cong Xun (noting:, hint that then transformat combination (TFC) does not have data) if expection transmits special Cong Xun; And u
k(physical channel (DPCH) number that s, c d) are among the time slot s, coding mixed transport channel (CCTrCH) uses is if transmit transformat combination (TFC) c or transmit special Cong Xun (wherein, d=1 represents that promptly expection transmits special Cong Xun).
In case the transmission power requirements (P of each time slot of following n following news frame
S; n) calculate after, transmission power requirements (P
S; n) will with predetermined critical (P
Thr) compare.If the inventive method calculates: the transmission power requirements (P of at least one time slot or news frame
S; n) above predetermined critical (P
Thr), then this time slot further the amount of commenting to abandon data.If transmission power requirements (P
S; n) greater than predetermined critical (P
Thr) more than one of time slot, then have maximum transmission power demand (P
S; n) time slot will at first select, and further the amount of commenting to abandon data.Then, all the other time slots then can be according to the transmission power requirements (P that successively decreases
S; n) the order amount of commenting.Relatively, if there is not transmission power requirements (P
S; n) greater than predetermined critical (P
Thr) time slot, then the inventive method does not just need to carry out any disposal and can transmit all data.
The transmission channel (DCH) that corresponding data is abandoned the time slot of considering and selecting can be called " be correlated with " transmission channel (DCH).In addition, these associated transport channels (DCH) can corresponding of the present invention being considered and are defined as follows:
This (these) transmission channel (DCH) is " involve " to the problem time slot (that is: transmission power requirements (P
S; n) greater than predetermined critical (P
Thr) time slot) the part of coding mixed transport channel (CCTrCH).If have at least one physical channel (DPCH) of this (this) transmission channel (DCH) of reflection in this time slot, as discussed previously, then this coding mixed transport channel (CCTrCH) just can be called: " involve " to the problem time slot.
These associated transport channels (DCH) are to sort according to predetermined condition.The preferably, the ordering of these transmission channels (DCH) be at first based on the news frame processing priority (FHP) of this transmission channel (DCH) (low news frame processing priority (FHP) are preferential), and then based on the related transmission power (high power is preferential) of this transmission channel (DCH).This related transmission power is the through-put power that is defined as the coding mixed transport channel (CCTrCH) that this transmission channel (DCH) is subordinate to.So, in specific news frame processing priority (FHP), the inventive method just can preferentially influence the transmission channel (DCH) of the coding mixed transport channel (CCTrCH) that constitutes high power requirements.These coding mixed transport channels (CCTrCH) can be under the jurisdiction of and have high path loss the user of (it is because with respect to the undesirable position of service base platform (BS)).
Subsequently, the inventive method can be placed on first transmission channel (DCH) in tabular " label " and recomputate selected problem time slot and interrogate the transmission power requirements (P of frame
S; n), as discussed previously, but must suppose that this label transmission channel (DCH) will can not transmit any data.If transmission power requirements (P
S; n) still greater than predetermined critical (P
Thr), then the inventive method will advance to next transmission channel (DCH) in the tabular, and continue to carry out above-mentioned steps, up to transmission power requirements (P
S; n) less than predetermined critical (P
Thr) or in tabular, do not have till other transmission channel (DCH).
So far, though transmission power requirements (P
S; n) may be less than predetermined critical (P
Thr), but the inventive method still can continue to carry out, because the label of part label transmission channel (DCH) may be taken away.That is to say that transport channel (DCH) may be replied, and do not allow transmission power requirements (P
S; n) go up to predetermined critical (P
Thr) above (or basic not rise).These transmission channels (DCH) should omit just right.Therefore, the inventive method will be utilized the reverse order of transmission channel (DCH) tabular, recomputates transmission power requirements (P
S; n), so as to the label of temporarily removing each transmission channel (DCH) and check transmission power requirements (P
S; n) whether increase and go up to predetermined critical (P
Thr) more than.If the removal of transport channel (DCH) label does not cause transmission power requirements (P
S; n) go up to predetermined critical (P
Thr) more than, then remove this transmission channel (DCH) label.Relatively, if the removal of transmission channel (DCH) label can make transmission power requirements (P
S; n) go up to predetermined critical (P
Thr) more than, just label and will can not transmit wherein data again of this transmission channel (DCH) then.
By the time after the program of abandoning of first (that is: the poorest) problem time slot was finished, the inventive method just can optionally be restarted.In this case, the transmission power requirements (P of all other time slots
S; n) all can recomputate, and the inventive method also can be by new " the poorest " the problem time slot restarts, if also have the words (not comprising the time slot of having carried out the program of abandoning) of other time slot in the tabular.Recomputate the transmission power requirements (P of other time slot
S; n) main cause be: the transmission power requirements (P of other time slot
S; n) also may abandon data at part transmission channel (DCH) and and then reduce after with crowded (congestion) situation that discharges other time slot.This may take place really, if coding mixed transport channel (CCTrCH) uses the physical channel (DPCH) of different time slots.
By the time after all problems time slot had all been handled, the inventive method just can finish.Subsequently, the transmission data just can be sent to ground floor control, and these label transmission channels (DCH) will can not transmit any data.In theory, the transformat of part transmission channel (DCH) is reduced to does not have data interrogating to produce wrong transformat combination (TFC) in the frame in part.After this abandoned program in execution, if the inventive method is found to be about to occur this situation, then the inventive method just can reduce the transformat of these transmission channels that transmit simultaneously (DCH), till correct transformat combination (TFC) occurring.If this method infeasible (for instance, because the data of other transmission channel (DCH) transmit in advance), then the inventive method transformat that just radio network controller (RNC) can be offered base station (BS) is given back.
Fig. 1 is the execution in step that the inventive method is implemented in expression, and its label list is shown 10.Via the inventive method, only have in selected time slot, assign the transmission channel that the user was subordinate to (DCH) data of physical channel (DPCH) just can be considered to abandon.
The inventive method at first starts from step 12, and in order to the identification problem time slot, wherein, the data of problem time slot will be considered and abandon.For the identification problem time slot, the present invention must calculate down in n the news frame, the transmission power requirements (P of each time slot s
S; n) prediction.Then, transmission power requirements (P
S; n) greater than power threshold (P
Thr) time slot just can be identified as the problem time slot.
Based on the maximum admissible power of base station (BS), this power threshold (P
Thr) be adjustable predetermined value.This power threshold (P
Thr) can be any number, but the integral multiple of the maximum admissible power of base station (BS) preferably, for instance: 1 times to 5 times.This power threshold (P
Thr) be to be used for the aggressiveness degree that control data abandons.Particularly, as this power threshold (P
Thr) higher, then the inventive method abandon the degree of data will be more conservative.That is to say higher power threshold (P
Thr) will recognize less problem time slot, and then reduce and consider transmission channel (DCH) number that data are abandoned.
In step 14, the present invention will deciding step 12, in fact, whether discerns any problem time slot.If step 12 does not recognize any problem time slot, then the inventive method will finish in step 15 and can optionally restart.On the contrary, if step 12 recognizes the problem time slot really, then the inventive method will advance to step 16, and selectedly has a maximum transmission power demand (P
S; n) the problem time slot.In step 18, the inventive method will be discerned associated transport channel (DCH).As discussed previously, for given user, the data that radio network controller (RNC) is sent to base station (BS) will be cut into one group of transmission channel (DCH), its be multitask to encode mixed transport channel (CCTrCH) and video to physical channel (DPCH) to send the user to.In selected at present problem time slot, utilize the transmission channel (DCH) of physical channel (DPCH) to be called " be correlated with " transmission channel (DCH).
In step 20, these associated transport channels (DCH) can sort according to the order that increases progressively the news frame processing priority and the related transmission power of successively decreasing.The related transmission power of transport channel (DCH) promptly is the through-put power of the coding mixed transport channel (CCTrCH) that is subordinate to of this transmission channel (DCH).In step 22, Dmax is the number that is defined as associated transport channel (DCH).In step 24, the inventive method can determine whether Dmax equals 0.If Dmax equals 0, then expression: do not have associated transport channel (DCH) in this time slot, and the inventive method will return step 16, and select time large transmission power demand (P
S; n) time slot.If Dmax is not equal to 0, then the inventive method will advance to step 26, and wherein, D can be defined as the certain relevant transmission channel of considering outside associated transport channel (DCH) group (DCH), and is set at 1.This can guarantee: the first associated transport channel (DCH) in the tabular can preferentially be considered, so as to allowing the preferential amount of commenting of associated transport channel (DCH) of lowest priority and maximum transmission power.
In step 28, and D (that is: first, second, third, etc. etc.) associated transport channel (DCH) can carry out label to abandon data.That is to say that if D equals 1, then the first associated transport channel (DCH) just can carry out label to abandon data.Subsequently, in step 30, the transmission power requirements (P of selected time slot
S; n) can recomputate, suppose that the data of D associated transport channel (DCH) will can not transmit.Then, in step 32, the inventive method can determine transmission power requirements (P
S; n) whether less than power threshold (P
Thr).If transmission power requirements (P
S; n) less than power threshold (P
Thr), then the inventive method will advance to step 36, and wherein, the label of D associated transport channel (DCH) can be removed, and can confirm so as to making the inventive method whether this transmission channel (DCH) must be abandoned.If transmission power requirements (P
S; n) be not less than power threshold (P
Thr), then the inventive method can determine in step 34 whether D equals Dmax, that is: whether all associated transport channels (DCH) are all considered.If D is not equal to Dmax, then expression: all associated transport channels (DCH) are not considered as yet fully, and the inventive method will advance to step 35.In step 35, D can increase progressively 1, and is so as to label and consider next associated transport channel (DCH) to abandon data, as discussed previously.
After in case step 28 to step 3 is all finished, for each associated transport channel (DCH), with transmission power requirements (P
S; n) reduce to power threshold (P
Thr) following necessary data all carried out label and abandoned.Yet, label and abandoned multidata and also may cause risk.Therefore, the inventive method also can continue the amount of commenting and abandons the effect that the different associated transport channels of label (DCH) combination may cause.This can guarantee: the present invention can abandon amount of data optimal, can optionally not abandoned so as to making most of data, also can reduce the transmission power requirements (P of selected time slot simultaneously
S; n).
As discussed previously, the label of D associated transport channel (DCH) can be removed in step 36.Subsequently, in step 38, the present invention will the computes transmit power demand (P '
S; n) temporary transient prediction.This transmission power requirements (P '
S; n) calculating can consider the current state (that is: whether have label) of these associated transport channels (DCH) simultaneously.
In step 40, the inventive method can be according to transmission power requirements (P
S; n) and power threshold (P
Thr) with the amount of commenting transmission power requirements (P '
S; n).Particularly, in step 40, the inventive method can determine transmission power requirements (P '
S; n) whether greater than transmission power requirements (P
S; n) and power threshold (P
Thr).If transmission power requirements (P '
S; n) simultaneously greater than transmission power requirements (P
S; n) and power threshold (P
Thr), then expression: the transmission power requirements (P of selected time slot
S; n) possibly can't utilize the data of D associated transport channel (DCH) fully to be reduced.Therefore, if the label removal of associated transport channel (DCH) can make transmission power requirements (P '
S; n) greater than transmission power requirements (P
S; n) and power threshold (P
Thr), then this associated transport channel (DCH) just need carry out label again in step 42, so as to abandoning the data of this associated transport channel (DCH).Relatively, determine in step 40 as if the inventive method: transmission power requirements (P '
S; n) be not more than transmission power requirements (P
S; n) and power threshold (P
Thr), then expression: the transmission power requirements (P of selected time slot
S; n) can fully reduce, and can transmit the data of D associated transport channel (DCH).In this case, D associated transport channel (DCH) will be kept the state of no label, and the inventive method will advance to step 41, wherein, and transmission power requirements (P
S; n) can set equal transmission power requirements (P '
S; n).
Then, no matter whether D associated transport channel (DCH) carries out label again, and the inventive method all can advance to step 44.In step 44, the inventive method will determine whether D associated transport channel (DCH) is the first associated transport channel (DCH), so as to guaranteeing that before considering all associated transport channels (DCH) that receive label all can utilize rightabout, similarly considers and remove label again.This can make abandons the combination of the suitable associated transport channel (DCH) of label, so as to according to power threshold (P
Thr) optimization transmission power requirements (P
S; n) (that is: select suitable associated transport channel (DCH) combination to abandon data, so as to abandoning minimum data amount and guaranteeing transmission power requirements (P
S; n) can not surpass power threshold (P
Thr)).It should be noted, according to power threshold (P
Thr) optimization transmission power requirements (P
S; n), the inventive method can also make transmission power requirements (P
S; n) as far as possible near power threshold (P
Thr), and surely not surpass power threshold (P
Thr).
If D associated transport channel (DCH) promptly is the first associated transport channel (DCH) (that is: D equals 1), then the inventive method will advance to step 46.If not, then the inventive method will continue step 45, and wherein, D can increase progressively 1, so as to considering the label of removing next associated transport channel (DCH).
Consider (step 28 is to step 35) and consider (step 36 is to step 45) again to abandon data in case all suitable associated transport channels (DCH) are all finished, the inventive method will determine whether also have the other problem time slot (by step 12 identification) in step 46.If also have the other problem time slot, then the inventive method can advance to step 48, so as to recomputating transmission power requirements (P
S; n).In case the transmission power requirements (P of all the other problem time slots
S; n) all calculate again finish after, step 16 can selected have maximum transmission power demand (P now
S; n) time slot, and the inventive method also can continue thus, and is as discussed previously.On the contrary, if do not have the other problem time slot, then the inventive method will finish in step 50 and can not transmit the data with label.
For the example of implementing the inventive method is provided, suppose to have altogether three associated transport channels (DCH) D1, D2, D3, wherein, transmission channel (DCH) D3 has the highest news frame processing priority (FHP), and transmission channel (DCH) D1 and D2 then have identical news frame processing priority (FHP).In addition, suppose power threshold (P
Thr) be 1.0W, indivedual related transmission power of transmission channel (DCH) D1, D2, D3 then are 0.1W, 0.1W, 1.1W.
The news frame processing priority (FHP) and the related transmission power of given these transmission channels (DCH), these transmission channels (DCH) just can sort in step 20 and be D1, D2, D3 (that is: at first increase progressively news frame processing priority (FHP), the related transmission power of successively decreasing then).Therefore, for transmission channel (DCH) D1, D2, D3, D equals 1,2,3 respectively.In addition, suppose the transmission power requirements (P of part or all of channel data
S; n) be:
D1+D2+D3：1.3W
D2+D3:1.2W is only arranged
D3:1.1W is only arranged
D2:0.1W is only arranged
D1+D2:0.2W is only arranged
So as can be known, whole transmission power requirements (P of three transmission channels (DCH)
S; n) be 1.3W, it is greater than the power threshold (P of 0.3W
Thr).Therefore, partial data must be abandoned, so as to avoiding surpassing power threshold (P
Thr) situation.
In this example, the transmission channel of low priority (DCH) D1 and D2 can at first abandon label.Transmission channel (DCH) D1 and D2 are first transmission channels (DCH) of at first abandoning label, because the ordering of these associated transport channels (DCH) be at first according to the news frame processing priority (FHP) that increases progressively, then according to the related transmission power of successively decreasing, as discussed previously.Yet, abandon label transmission channel (DCH) D1 and D2 and be not sufficient to power threshold (P
Thr) be reduced to power threshold (P
Thr).That is to say that the data of abandoning transmission channel (DCH) D1 and D2 can make transmission power requirements (P
S; n) reduce to 1.1W by 1.3W, still, this transmission power requirements (P
S; n) still can be greater than the power threshold (P of 1.0W
Thr).Therefore, transmission channel (DCH) D3 also needs to abandon label, so as to allowing transmission power requirements (P
S; n) be reduced to power threshold (P
Thr) below.Yet, unfortunately, abandon label transmission channel (DCH) D3 and but can make transmission power requirements (P
S; n) reduce to 0.0W, and then interrupt the transmission of any data.As if this is excessive, because transmission power requirements (P
S; n) only need to abandon the data of transmission channel (DCH) D3 and the transfer of data that can allow transmission channel (DCH) D1 and D2, just be enough to meet power threshold (P
Thr) demand, though the news frame processing priority (FHP) of transmission channel (DCH) D1 and D2 is really less than the news frame processing priority (FHP) of transmission channel (DCH) D3.
This situation can be considered in the removal label stage of the inventive method (step 36 is to step 45).In this case, the inventive method at first can be removed the label of transmission channel (DCH) D3.But, the label of transmission channel (DCH) D3 but can apply in step 42 again, because, in step 40, transmission power requirements (P '
S; n) can be simultaneously greater than transmission power requirements (P
S; n) and power threshold (P
Thr) (that is: transmission power requirements (P '
S; n) equal 1.1W, transmission power requirements (P
S; n) equal 0.0W and power threshold (P
Thr) equal 1.0W).It should be noted the transmission power requirements (P that step 42 is used
S; n) be to be subjected to the transmission power requirements (P of step 26 to the previous label influence of step 35
S; n).That is to say that in this example, transmission channel (DCH) D1, D2, D3 all can abandon label, and then calculate the transmission power requirements (P of 0.0W in step 30
S; n).Therefore, this transmission power requirements (P
S; n) just can be in step 40 with transmission power requirements (P '
S; n) compare.In addition, if transmission power requirements (P
S; n) in step 41, be set at transmission power requirements (P '
S; n), this transmission power requirements (P then
S; n) also can in step 40, use, if can advancing to step 45 and continue thus, the step 44 of the inventive method carries out.Generally speaking, transmission power requirements (P no matter
S; n) when compare with another parameter, the inventive method all can be used the transmission power requirements (P of latest computed
S; n).
Get back to this example, in case the label of transmission channel (DCH) D3 applies in step 42 again, then the inventive method will advance to step 44, wherein, the inventive method will determine whether D equals 1 (that is: whether present associated transport channel (DCH) is considered is the first associated transport channel (DCH)).Close transmission channel (DCH) but not the first associated transport channel (DCH) because transmission channel (DCH) D3 is a third phase, the inventive method will continue to carry out, because all transmission channels (DCH) of before having considered are not all considered as yet again.Therefore, D will successively decrease 1 in step 45, and then carries out the label removal of transmission channel (DCH) D2 in step 36.In step 37, because transmission channel (DCH) D3 and D3 has the label of abandoning and transmission channel (DCH) D2 has removed label, so transmission power requirements (P '
S; n) will in step 38, become 0.1W (1.3W-1.1W-0.1W=0.1W).Therefore, transmission power requirements (P '
S; n) will be can be simultaneously greater than transmission power requirements (P
S; n) and power threshold (P
Thr).That is to say, transmission power requirements (P '
S; n) will be greater than transmission power requirements (P
S; n), but can be greater than power threshold (P
Thr) (that is: the transmission power requirements of 0.1W (P '
S; n) can with the transmission power requirements (P of 0.0W
S; n) and the power threshold (P of 1.0W
Thr) relatively).Because transmission power requirements (P '
S; n) still be lower than power threshold (P
Thr), even abandoning under transmission channel (DCH) the D2 data conditions, so the data of transmission channel (DCH) D2 can forever be abandoned.In addition, the processing mode of transmission channel (DCH) D1 also is like this.Therefore, for above-mentioned example, the data of transmission channel (DCH) D3 will be abandoned, and the data of transmission channel (DCH) D1 and D2 then can be retained transmission.
Now, please refer to Fig. 2, it represents a kind of system, so as in the cell phone system of avoiding utilizing variable rate transmission, the interruption in power (power outage) of base station.This system comprises radio network controller (RNC) 112, base station (BS) 114, reaches user's equipment (UE) 116.
For given user, the data that are sent to base station (BS) 114 via radio network controller (RNC) can be cut into several transmission channels (DCH).Base station (BS) 114 is understood the data of multitask transmission channels (DCH) and it is videoed to suitable physical channel (DPCH).Base station (BS) 114 can reach the through-put power of using at present based on the defeated data of different transmission channels (DCH) tendency to develop, and prediction next (following several) is interrogated in the frame, the transmission power requirements (P of each time slot
S; n) prediction.In addition, be identified as the problem time slot time slot (that is: transmission power requirements (P
S; n) above power threshold (P
Thr) time slot) will the amount of commenting whether abandon data.
The transmission channel of problem time slot (DCH) data can the amount of commenting, best transmission channel (DCH) combination of transmitting/abandoning so as to recognition data.Can identify in case abandon the transmission channel (DCH) of amount of data optimal, the data of these transmission channels (DCH) just can not utilize base station (BS) 114 to transmit.Base station (BS) 114 can send a signal to radio network controller (RNC) 112, so as to the data of representing not transmit.
Though the present invention has utilized preferred embodiment to describe in detail as above.Yet, be familiar with this operator when carrying out various may the change and adjust to preferred embodiment of the present invention under the prerequisite of spirit of the present invention and scope.Therefore, protection range of the present invention is when being as the criterion with following the application's claim scope.
Claims (21)
1. one kind in order to avoiding in utilizing the cell phone system of variable rate transmission, the method for the interruption in power of a base station, and this method comprises the following steps:
A) calculate at least one following news frame, the transmission power requirements prediction of each time slot;
B) identification has the time slot greater than a transmission power requirements of a predetermined critical; And
C) according to this predetermined critical, this transmission power requirements prediction of each identification time slot of optimization.
2. the method for claim 1 is characterized in that, according to this predetermined critical, the step of this transmission power requirements prediction of each identification time slot of optimization also comprises the following steps:
A) the news frame processing priority and the related transmission power of identification transmission channel, wherein, this transmission channel has and will discern the data of transmitting on the physical channel of time slot at this; And
B) at first interrogate frame processing priority, next this related transmission power, and abandon the data of this transmission channel based on this transmission channel based on this.
3. the method for claim 1 is characterized in that, according to this predetermined critical, the step of this transmission power requirements prediction of each identification time slot of optimization also comprises:
A) the news frame processing priority and the related transmission power of identification transmission channel, wherein, this transmission channel has the data of transmitting on a physical channel of this identification time slot;
B) apply a label each combination to this transmission channel, and it is temporarily to represent: the data that apply the transmission channel of this label will be abandoned; And
C) data in the transmission channel that constitutes transmission channel combination are abandoned in selection, and wherein, this transmission channel is combined as according to this predetermined critical, and this transmission power requirements dopester of each identification time slot of optimization.
4. the method for claim 1 is characterized in that, this transmission power requirements prediction of each time slot be utilize one at present the news frame information and calculated.
5. method as claimed in claim 4 is characterized in that, this transmission power requirements prediction of each time slot is based on the through-put power of using during this present news frame and is calculated.
6. the method for claim 1 is characterized in that, this predetermined critical is based on the maximum admissible power of this base station.
7. the method for claim 1 is characterized in that, this predetermined critical is the multiple of the maximum admissible power of this base station.
8. one kind in order to avoiding in utilizing the cell phone system of variable rate transmission, the method for the interruption in power of a base station, and this method comprises the following steps:
A) calculate at least one following news frame, the transmission power requirements prediction of each time slot;
B) identification has the time slot greater than a transmission power requirements of a predetermined critical;
C) select time slot with maximum transmission power demand;
D) discern the transmission channel of this selected time slot;
E) at first by increase news frame processing priority, secondly by reducing related transmission power, with this identification transmission channel that sorts;
F) apply a label, and it is temporarily to represent: the data that apply in the transmission channel of this label will be abandoned, and according to the order of this transmission channel that sorted, recomputate this transmission power requirements prediction of this selected time slot of each identification transmission channel, be equal to or less than a predetermined critical up to this transmission power requirements prediction;
G) according to the reverse order of this transmission channel that sorted, temporarily remove this label that each transmission channel had before applied, and after each continuous label is removed, recomputate this transmission power requirements prediction, whether can make this transmission power requirements prediction surpass this predetermined critical so as to the removal that determines any label; And
H) data that suppress any transmission channel transmit, if the label removal of this any transmission channel can make this transmission power requirements prediction surpass this predetermined critical.
9. method as claimed in claim 8 is characterized in that, this transmission power requirements prediction of each time slot be utilize one at present the news frame information and calculated.
10. method as claimed in claim 9 is characterized in that, this transmission power requirements prediction of each time slot is based on the through-put power of using during this present news frame and is calculated.
11. method as claimed in claim 8 is characterized in that, this predetermined critical is based on the maximum admissible power of this base station.
12. method as claimed in claim 11 is characterized in that, this predetermined critical is the multiple of the maximum admissible power of this base station.
13. one kind in order to avoid the system in the interruption in power of the cell phone system that utilizes variable rate transmission, this system comprises:
A) radio network controller, wherein, data are sent to a base station at least one user;
B) wherein, the data that are sent to this base station by this radio network controller are to be assigned a news frame processing priority and to be separated into the transmission channel of videoing to physical channel, and are sent to this at least one user; And
C) this base station is the time slot of predicting greater than a transmission power requirements of a predetermined critical that has of interrogating frame at least one future in order to discern, and according to this predetermined critical, and this transmission power requirements prediction of each identification time slot of optimization.
14. system as claimed in claim 13, it is characterized in that, this base station predicts and determines each transmission power requirements to predict whether surpass a predetermined critical of any time slot, have the time slot of predicting greater than a transmission power requirements of a predetermined critical and discern at least one following news frame by a transmission power requirements of each time slot that calculates this at least one following news frame.
15. system as claimed in claim 14 is characterized in that, this base station be utilize one at present in the news frame, the utilizable information of this base station, and this transmission power requirements prediction of calculating each time slot.
16. system as claimed in claim 15 is characterized in that, this base station is based on this employed through-put power during news frame at present, to calculate this transmission power requirements prediction.
17. system as claimed in claim 14 is characterized in that, this predetermined critical is based on the maximum admissible power of this base station.
18. system as claimed in claim 17 is characterized in that, this predetermined critical is the multiple of the maximum admissible power of this base station.
19. system as claimed in claim 13 is characterized in that, this base station be at first based on this news frame priority, secondly based on this related transmission power of this transmission channel, and abandon the data of this transmission channel and then this transmission power requirements prediction of optimization.
20. system as claimed in claim 19 is characterized in that, this base station is to determine to abandon which data by the following step:
A) apply a label each combination to this transmission channel, and it is temporarily to represent: the data that apply the transmission channel of this label will be abandoned; And
B) data of the transmission channel that constitutes transmission channel combination are abandoned in selection, and wherein, this transmission channel is combined as according to this predetermined critical, and this transmission power requirements dopester of each identification time slot of optimization.
21. system as claimed in claim 13 is characterized in that, this base station is by this transmission power requirements prediction of the following step optimization:
A) at least one transmission channel that should discern time slot of identification;
B) at first by increase news frame processing priority, secondly by reducing related transmission power, and this identification transmission channel that sorts;
C) apply a label, and it is temporarily to represent: the data that apply a transmission channel of this label will be abandoned, and according to the order of this transmission channel that sorted, recomputate this transmission power requirements prediction of this selected time slot of each identification transmission channel, be equal to or less than a predetermined critical up to this transmission power requirements prediction;
D) according to the reverse order of this transmission channel that sorted, temporarily remove this label that each transmission channel had before applied, and after each continuous label is removed, recomputate this transmission power requirements prediction, whether can make this transmission power requirements prediction surpass this predetermined critical so as to the removal that determines any label; And
E) data that suppress any transmission channel transmit, if the label removal of this any transmission channel can make this transmission power requirements prediction surpass this predetermined critical.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38156702P | 2002-05-16 | 2002-05-16 | |
| US60/381,567 | 2002-05-16 | ||
| US10/272,874 | 2002-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1698389A true CN1698389A (en) | 2005-11-16 |
Family
ID=35350227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03811072 Pending CN1698389A (en) | 2002-05-16 | 2003-05-13 | Method and system for avoiding power outages at the base station in cellular system using variable rate transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1698389A (en) |
-
2003
- 2003-05-13 CN CN 03811072 patent/CN1698389A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2671267Y (en) | Consumer apparatus for realizing high-speed dynamic link arrangement | |
| CN1310564C (en) | Method and apparatus for increased information transfer in communication system | |
| CN1208921C (en) | Method and apparatus for adaptive transmission control in high data rate communication system | |
| US7912474B2 (en) | Radio channel control method in a cellular system | |
| CN1224293C (en) | Dispatching device, station device and wireless communication method | |
| EP2117186B1 (en) | Scheduling method and system for hsupa | |
| JP2003143108A (en) | Method of transmitting and receiving information about orthogonal code assigned to user data in high speed data packet access communication system | |
| US7668134B2 (en) | Optimal frequency of walsh mask broadcast for forward high-speed packet data channels | |
| CN1132463C (en) | Method in selection of transfer window, and mobile station | |
| KR101627164B1 (en) | Apparatus and method for allocating resource in multi carrier system | |
| CN1242646C (en) | Method for processing resource management in a mobile communication system | |
| EP1626511A1 (en) | Base station, mobile station, communication system, and communication method | |
| CN101114869A (en) | system message block scheduling method and device in UMTS system | |
| CN1631012A (en) | Scheduling method and apparatus for half-duplex transmission | |
| KR100691551B1 (en) | Method and system for avoiding power outages at the base station in cellular system using variable rate transmission | |
| CN1541004A (en) | Method of and device for resource allocation in digital celluar communication systems | |
| CN1505421A (en) | Method of resource indication in mobile communications systems | |
| CN1698389A (en) | Method and system for avoiding power outages at the base station in cellular system using variable rate transmission | |
| CN1788468A (en) | Method for transmitting data from a transmitting station to a receiving station via a radio link, and corresponding receiving station and transmitting station | |
| CN101179512A (en) | Resource scheduling method and equipment | |
| CN1917400A (en) | Method of determining next transport format combination for being utilized in next transmission time interval and device | |
| CN1819487A (en) | Frequency-extending code-word distribution containing frequency-extending factor in time-division duplex system | |
| WO2011142698A1 (en) | Method and apparatus for improving dl transmission power related to ues in state cell_fach | |
| CN1968052A (en) | Method of reconfiguration of common transfer channel | |
| JP2009225326A (en) | Control apparatus and spreading code allocation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1080659 Country of ref document: HK |
|
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20051116 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1080659 Country of ref document: HK |