CN101471862A - Method for scheduling package when power being limited - Google Patents
Method for scheduling package when power being limited Download PDFInfo
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- CN101471862A CN101471862A CNA2007103040161A CN200710304016A CN101471862A CN 101471862 A CN101471862 A CN 101471862A CN A2007103040161 A CNA2007103040161 A CN A2007103040161A CN 200710304016 A CN200710304016 A CN 200710304016A CN 101471862 A CN101471862 A CN 101471862A
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Abstract
The invention discloses a packet scheduling method used in case of power limitation, which comprises the following steps: a radio network controller (RNC) pre-configures in a NodeB and reduces transmission power of each code channel of a secondary common control physical channel (SCCPCH) in case of wave packet shaping; at the current scheduling transmission time interval (TTI), when only DFACH sends cache data on the SCCPCH, the RNC determines user equipment (UE) at the current scheduling TTI from all activated UEs under CELL_FACH according to a predetermined scheduling strategy; and when judging the cache data quantity of the UE at the current scheduling TTI meets the shaping requirement, the RNC conforms and sends the data quantity at the current scheduling TTI and the same quantity of cache data of the UE at the current scheduling TTI to the NodeB, and informs the NodeB to conduct wave packet shaping and conduct signal transmission with reduced the transmission power which is pre-configured for the case of wave packet shaping. The packet scheduling method can improve the resource utilization of a system and improve the power limitation problem of the system.
Description
Technical field
The present invention relates to bag dispatching method, the bag dispatching method during particularly a kind of power limited.
Background technology
The TD-SCDMA system has the advantages that the employing smart antenna carries out wave beam forming, therefore, considers the factor of wave beam forming in time slot power planning, makes full use of the total emission power that figuration gain has reduced time slot.
In the frame structure of TD-SCDMA system, the TSO time slot is responsible for transmitting broadcast system information, has mainly carried common signal channels such as PCCPCH, FPACH, PICH and SCCPCH, and specifically each common signal channel bearer service is described below:
1) PCCPCH is used to carry the data of transmission channel BCH, and full cell system information broadcasting is provided.The code channel of 2 SF=16 of configuration.
2) FPACH is used to respond the UE access request that the UpPTS time slot is received, adjusts transmitted power and the simultaneous bias of UE.The code channel of 1 SF=16 of configuration.
3) PICH is used for using the PCH channel (being mapped on the SCCPCH) of following thereafter in order to indicate specific UE whether to need to understand with transmission channel PCH pairing;
4) SCCPCH is used to carry the data from transmission channel FACH and PCH.The code channel of configuration 5-8 bar SF=16.
TSO time slot at the above-mentioned common signal channel of carrying does not carry out wave beam forming at present.In order to remedy the figuration gain that lacks, each public physic channel need promote solid size road transmitting power in the TSO time slot, to guarantee identical coverage; Simultaneously, consider the coverage of sub-district, PCCPCH continues to promote the transmitting power of several dB.Above power adjustment mode has caused the TSO power limited, though the TS0 time slot is shared the transmitting power of assistant carrier frequency, still can't solve the power limited problem of TSO, can't carry out full code channel resource configuration, causes resource waste.
To be RNC carry out the method for scheduling of resource to being carried on the business CELL_FACH state under for MAC scheduling, just SCCPCH gone up the dispatching method that carries data.Particularly, the MAC_C entity and the MAC_D entity that in RNC, comprise corresponding each UE, the MAC_D entity issues the data that the wait of corresponding UE is scheduled according to the flow control strategy to the MAC_C entity, in the MAC_C entity, form data cached, the MAC_C entity is dispatched data cached according to the MAC scheduling scheme.Traditional classical MAC scheduling scheme is described below:
1) SCCPCH does not carry out wave beam forming, and code channel resource adopts fixing configuration mode, and wherein, the maximum TF form of FACH transfer of data support determines jointly that by existing code channel resource configuration and coding, rate-matched mode form is unique; Wherein, maximum TF form refers to that all code channels are transmission block (TB) number of transmission altogether under the maximum code channel number configuration that can carry out the respective channel transmission;
2) use polling algorithm to dispatch to the UE under the CELL_FACH state, concrete Round Robin mode is as follows:
A, each user are in the request queue, so that obtain service;
B, when carrying out scheduling of resource, the request in the non-empty queue is accepted service in the repeating query mode;
Before same user accepted service once more in c, the formation, the user of other all non-empty queue must servicedly go over;
Unless only there is a non-empty queue in d, and this non-empty queue has only a request, otherwise a request cannot be accepted twice service continuously.
Above-mentioned MAC dispatching method is simple, fairness and short time fairness in the time of can guaranteeing long between different UEs.But there are two big shortcomings in this MAC dispatching method:
1. owing to the TS0 power limited, the configuration of SCCPCH code channel resource is less, thereby FACH supports that the TF form is less, causes TS0 code source utilance lower, and the FACH throughput is less;
2. polling mode can not require according to the QoS of survice of UE to distinguish scheduling, thereby the dispatch service based on QoS can not be provided, and can't satisfy high qos requirement user's service request.
Summary of the invention
In view of this, the bag dispatching method when the invention provides a kind of power limited can improve the resource utilization of system, improves the power limited problem.
For achieving the above object, the present invention adopts following technical scheme:
Bag dispatching method during a kind of power limited comprises:
RNC disposes in NodeB in advance, reduces the transmitting power of each code channel of SCCPCH under the wave beam forming situation;
In the current TTI scheduling constantly, when having only DFACH to exist transmission data cached on the SCCPCH channel, RNC is among the UE of state of activation under the CELL_FACH at all according to default scheduling strategy, determines the UE of current TTI scheduling;
RNC judges when the buffer data size of the UE of current TTI scheduling satisfies figuration and requires, determine and data cached to NodeB issues the data volume of current TTI scheduling and the described current TTI that equates with this data volume is dispatched UE, notice NodeB carries out wave beam forming, and notice NodeB carries out the signal emission with the transmitting power after reducing under the pre-configured wave beam forming situation.
Preferably, describedly satisfy the figuration requirement and be: the data of in current TTI, only dispatching a UE; And the figuration information of the UE of described current TTI scheduling is in the correlated time of channel.
Preferably, the transmitting power of each code channel of reduction SCCPCH is under the described wave beam forming situation: pre-determine the figuration gain of FACH, the transmitting power reduction amount of described each code channel of SCCPCH is less than or equal to the figuration gain of described FACH.
Preferably, the transmitting power after described RNC will reduce when physical channel is reshuffled is configured among the NodeB.
Preferably, this method further comprises: transmitting power after reducing according to SCCPCH under the figuration situation in advance and the maximum code channel number when not considering power limited, determine that the maximum code channel number of supporting of SCCPCH is kept among the RNC under the figuration situation, and when base station configuration, should maximum support the code channel number to be configured in the base station, RNC determines SCCPCH maximum transmission data amount under the figuration situation according to the described maximum code channel number of supporting;
Describedly determine that the data volume that issues the current TTI scheduling to NodeB is: the data volume that RNC determines described current TTI scheduling according to buffer data size and the described SCCPCH maximum transmission data amount of the UE of described current TTI scheduling.
Preferably, the data volume of described current TTI scheduling is the DFACH formation buffer data size of the UE of described current TTI scheduling and the minimum value in the described SCCPCH maximum transmission data amount.
Preferably, SCCPCH maximum transmission data amount is under the described figuration situation, at described maximum support code channel number now, and the transmission block TB number of the common transmission of all SCCPCH code channels.
Preferably, the maximum code channel number of supporting of SCCPCH is under the described figuration situation, and the transmitting power after the total transmitting power of antenna and the described reduction is to be amassed, the two minimum value of the maximum code channel number when not considering power limited.
Preferably, described RNC comprises to the data volume that NodeB issues the current TTI scheduling:
RNC selects corresponding TFC form according to the data volume and the TFCS form of the current TTI scheduling of determining, determine the actual code channel number of current SCCPCH, and utilize transformat indication TFI that the actual code channel number of the described definite current use of SCCPCH is transferred to NodeB.
Preferably, described RNC notice NodeB carries out wave beam forming and is: RNC identifies current TTI in sending to the FP frame of NodeB need carry out wave beam forming.
Preferably, described scheduling strategy is:
The preferential TB piece of in a TTI, dispatching a UE;
By the relative priority of all UE that determine according to the FACH priority of described all UE, determine the scheduled throughput ratio of each UE;
Guarantee that twice scheduling interval of each UE minimizes;
Preferably, determine that according to the FACH priority of arbitrary UE the relative priority of this UE is P
Schedlue=k
SRV-QoSSRV
QoS+ b
SRV-QoS, wherein, k
SRV-QoSAnd b
SRV-QoSBe constant more than or equal to 0, and k
SRV-QoS+ b
SRV-QoS≠ 0, SRV
QoSShine upon the FACH dispatching priority of this UE that obtains according to the professional radio bearer RAB service quality QoS parameter of described arbitrary UE for RNC.
Preferably, the scheduled throughput ratio of determining each UE is: the ratio of the relative priority of each UE.
Preferably, after the scheduling of finishing all UE described in scheduling planning, perhaps, after having new UE to be carried under the CELL_FACH state, perhaps, after having new UE to migrate out the CELL_FACH state, after the UE that perhaps is in the unactivated state under the CELL_FACH transits to state of activation, after the UE that perhaps is in the state of activation under the CELL_FACH transits to unactivated state, again by according to current all be in the relative priority that the FACH priority of the UE of the state of activation under the CELL_FACH is determined, determine the scheduled throughput ratio in the described scheduling strategy.
Preferably, this method further comprises: according to the relative priority of described all UE, carry out the flow control of all UE, the buffer data size that divides orientation MAC_C to issue for the MAC_D of corresponding each UE according to described priority ratio.
Preferably, the MAC_D of corresponding each UE is initially when MAC_C issues data, described MAC_D sends the capacity application of the total data volume that comprises this transmission to MAC_C, described MAC_C distributes the buffer data size that issues according to the total data volume that comprises in the described capacity application that receives for described MAC_D;
Perhaps,
MAC_C initiatively distributes the buffer data size that issues for the MAC_D of corresponding each UE according to the flow control trigger mechanism.
Preferably, described flow control trigger mechanism is: send buffer data size less than the transmission buffer memory minimum threshold that sets in advance and received and be the data that buffer data size that MAC_D distributes equates last time at the MAC_C of UE correspondence.
Preferably, described MAC_D for corresponding each UE distributes the buffer data size that issues to comprise:
For being provided with, all UE send buffer memory minimum threshold N in advance
Min_TB=N
Max_TFN, described N
Max_TFBe SCCPCH maximum transmission data amount under the figuration situation, described N is a positive integer;
Based on described transmission buffer memory minimum threshold,, the upper limit that issues data volume is set for each UE is corresponding according to the relative priority ratio of all UE;
The described buffer data size that distributes for the MAC_D of corresponding each UE is the poor of the upper limit that issues data volume of corresponding UE and current transmission buffer data size.
As seen from the above technical solution, among the present invention, RNC disposes in NodeB in advance, reduce the transmitting power of each code channel of SCCPCH under the wave beam forming situation, increase SCCPCH code channel configured number, thereby guarantee under the wave beam forming condition, to make full use of system power resource and code channel resource.When carrying out the MAC scheduling, when having only DFACH to exist transmission data cached on the SCCPCH channel, RNC is among the UE of state of activation under the CELL_FACH at all according to default scheduling strategy, determines the UE of current TTI scheduling; RNC judges when the buffer data size of the UE of current TTI scheduling satisfies figuration and requires, determine and data cached to NodeB issues the data volume of current TTI scheduling and the described current TTI that equates with this data volume is dispatched UE, notice NodeB carries out wave beam forming, and notifies NodeB to carry out the signal emission with the code channel resource of transmitting power after reducing under the pre-configured wave beam forming situation and increase.Like this, after NodeB determines to carry out wave beam forming according to the notice that receives, the data cached wave beam forming that carries out of the UE of the described current TTI scheduling that RNC is issued, thereby improve the resource utilization of system, and be pre-configured in transmitting power after each code channel of SCCPCH reduces under the figuration situation among the NodeB according to RNC, data behind the wave beam forming are launched, thus the power limited problem of improvement system; And the power resource that further makes full use of saving increases the code channel resource configuration of SCCPCH, and then improves resource utilization.
Description of drawings
The overview flow chart of the bag dispatching method when Fig. 1 is a power limited provided by the invention.
Fig. 2 is the SCCPCH channel package dispatching method particular flow sheet during power limited in the embodiment of the invention.
Fig. 3 is the particular flow sheet of flow control methods in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further details below in conjunction with accompanying drawing.
By aforementioned each physical channel loaded service in the TS0 time slot is described as can be seen: PCCPCH is because the bearing system broadcast message can't be carried out wave beam forming; FPACH is because the control signaling of the single UE of carrying in every subframe, and can record the uplink information of this UE by UpPTS, so can carry out wave beam forming; Though each subframe of PICH is carried the paging indication information of single UE, its uplink information can't record, and therefore can't carry out wave beam forming; SCCPCH has carried the data of PCH, SFACH, DFACH, and when only transmitting DFACH data and its business datum and only belong to a UE, SCCPCH is fully can figuration.
Can draw by above-mentioned analysis, FPACH can carry out wave beam forming fully, but since FPACH to take code channel resource less, the gain that the FPACH figuration brings can't solve TSO power limited problem, has little significance to resource utilization ratio is provided.SCCPCH fully can figuration under the data conditions of only transmitting same UE on the DFACH, because SCCPCH configuration code channel resource is more, the gain that the FACH figuration brings can solve the power limited problem of TSO fully.
Based on above-mentioned analysis, basic thought of the present invention is: the FACH that the SCCPCH channel is carried carries out wave beam forming, thereby improves the resource utilization ratio of TSO time slot.
The overview flow chart of the bag dispatching method when Fig. 1 is a power limited provided by the invention.As shown in Figure 1, this method comprises:
Step 101, RNC disposes in NodeB in advance, reduces the transmitting power of each code channel of SCCPCH under the wave beam forming situation.
Step 102, when carrying out the MAC scheduling, when having only DFACH to exist transmission data cached on the SCCPCH channel, RNC is among the UE of state of activation under the CELL_FACH at all according to default scheduling strategy, determines the UE of current TTI scheduling.
Step 103, RNC judges when the buffer data size of the UE of current TTI scheduling satisfies figuration and requires, determine and data cached to NodeB issues the data volume of current TTI scheduling and the described current TTI that equates with this data volume is dispatched UE, notice NodeB carries out wave beam forming, and notice NodeB carries out the signal emission with the transmitting power after reducing under the pre-configured wave beam forming situation.
Wherein, described figuration requires to comprise: the data of only dispatching a UE in current TTI; And the figuration information of the UE of described current TTI scheduling is in the term of validity of wave beam forming, in the correlated time of channel just.Because when carrying out wave beam forming, need carry out according to the upstream data that UE sends, and the condition of user's position, channel etc. may change at any time, therefore require the time difference of the UE transmission upstream data of down beam shaping and reception to guarantee in certain limit, promptly in the term of validity of wave beam forming.
So far, method flow of the present invention finishes.After NodeB determines to carry out wave beam forming according to the notice that receives, the data cached wave beam forming that carries out of the UE of the described current TTI scheduling that RNC is issued, and be pre-configured in transmitting power after each code channel of SCCPCH reduces under the figuration situation among the NodeB according to RNC, the data behind the wave beam forming are launched.
As mentioned above, can carry out wave beam forming to the data of SCCPCH channel under suitable condition, thereby improve the resource utilization of system, improve the power limited problem of system.
Under the basic procedure of the invention described above, can also further make full use of wave beam forming gain in the following way, improve the FACH throughput and dispatch service based on QoS is provided:
One, owing on the SCCPCH channel, can carry out wave beam forming, reduced the transmitting power of single SCCPCH code channel, therefore under the certain prerequisite of total transmitting power, when carrying out wave beam forming, can further increase the code channel number of SCCPCH, thereby realize transmitting the more purpose of multidata, raising FACH throughput.But,,, still can not carry out wave beam forming if condition does not satisfy because the wave beam forming that carries out on the SCCPCH channel is with good conditionsi.Therefore, under different situations, need carry out dynamic-configuration to the code channel number of SCCPCH, to make full use of the gain that wave beam forming brings.
Two, can not require to distinguish scheduling according to the QoS of survice of UE for overcoming the existing dispatching method of mentioning in the background technology, defective based on the dispatch service of QoS can't be provided, in the method for the invention, dispatch service based on QoS can further be provided, satisfy high qos requirement user's service request.
Three, one of above-mentioned buffer data size figuration condition that need satisfy is: the data of a UE of scheduling in a TTI, therefore, if can dispatch for each UE prepares sufficient data cached being used for as far as possible, just can as often as possible adopt wave beam forming to send data, thereby further improve the resource utilization of system, improve the throughput of FACH.And as described in the background art, the data cached of UE issues and controls by the flow control strategy, therefore, among the present invention by the flow control strategy is improved the realization above-mentioned purpose.
Above-mentioned three aspects are combined with basic procedure of the present invention, can further make full use of wave beam forming gain, improve the FACH throughput and dispatch service based on QoS is provided.
Below by specific embodiment explanation the specific embodiment of the present invention, comprise the embodiment of above-mentioned three aspects.
Fig. 2 is the SCCPCH channel package dispatching method particular flow sheet during power limited in the embodiment of the invention.In this flow process, RNC at first guarantees the high priority data scheduling of high priority transfer channel in scheduling constantly.Then, judge whether current TTI can carry out the wave beam forming of FACH; At last, finish TFC according to the current TFCS that whether carries out wave beam forming and support and select, thus the radiation pattern of notice NodeB current TTI.Wherein, each transmission channel priority of SCCPCH carrying sorts as follows from high to low: PCH, SFACH, DFACH.Concrete, as shown in Figure 2, this method flow comprises:
Step 201 judges whether current scheduling moment PCH has transmission block (TB) to need transmission, if then execution in step 202, otherwise execution in step 203.
Step 202 is determined the TB number that PCH can send according to the TB number that current PC H sends in the buffer queue.
Wherein, select minimum value in the maximum TB number that TB number in current PC H buffer queue and PCH support, as the TB number that the PCH that determines can send, the TB number=min that promptly can send (current TB number, the maximum TB number that PCH supports).
Step 203 judges whether current scheduling moment SFACH has TB to need transmission, if then execution in step 204, otherwise execution in step 207.
Step 204 is determined the TB number that SFACH can send according to the TB number that current SFACH sends in the buffer queue.
Wherein, select minimum value in the maximum TB number that TB number in current SFACH buffer queue and SFACH support, as the TB number that the SFACH that determines can send, the TB number=min that promptly can send (current TB number, the maximum TB number that SFACH supports).
Step 205, this TTI can't carry out wave beam forming, determines the TB number that DFACH can send according to the TF form of non-figuration pattern support and the TB number in the current DFACH transmission buffer queue.
As previously mentioned, having only DFACH that transfer of data is arranged, when PCH and SFACH all do not have transfer of data, just might carry out wave beam forming, and in carrying out this step the time, then showing to be engraved in there is transfer of data on PCH and/or the SFACH when current scheduling, therefore, current TTI can't be carried out wave beam forming.
When determining the TB number that DFACH sends, TB number=min of the DFACH that can send (current TB number, TB number-(TB number+1 that SFACH can send)/2 that maximum TB number-PCH that DFACH supports under the non-figuration pattern can send); TF form when wherein, the TF form of non-figuration pattern support refers to just that SCCPCH does not carry out wave beam forming in the background technology.
Step 206, determine the UE of current scheduling according to dispatching algorithm, if the data volume in the transmission buffer memory of current UE can send the TB number less than the DFACH that step 205 calculates, then determine next UE, equal DFACH that step 205 calculates up to the TB of current transmission number and can send the TB number or not have again and can dispatch UE according to dispatching algorithm.
This step is under non-figuration pattern, determines the UE of scheduling this time, and the mode of describing in concrete mode and the background technology is identical, just repeats no more here.
Step 207 only has or not among the TTI of PCH, SFACH data and just can only transmit the DFACH data, and this is the necessary condition of FACH figuration, changes step 208 thus over to.
Step 208 is in the UE that determines the current TTI scheduling among the UE of the state of activation under the CELL_FACH according to the scheduling strategy that sets in advance at all.
For guaranteeing to carry out as much as possible the wave beam forming of FACH, and provide dispatch service at different QoS business needs, the data dispatch strategy to DFACH improves in advance.The scheduling strategy of the DFACH that sets in advance in the present embodiment comprises:
1, the preferential TB piece of in a TTI, dispatching a UE, thus satisfy the wave beam forming condition as much as possible;
2, determine the scheduled throughput ratio of each UE according to the relative priority of all UE, in scheduling constantly, dispatch according to the scheduled throughput ratio;
Particularly, for all UE calculate relative priority, and determine the scheduled throughput ratio of each UE according to this relative priority; Wherein, all UE refer to all UE of state of activation under the current CELL_FACH of being in.
A, the mode that each UE is calculated relative priority are:
P
Schedlue(i)＝k
SRV-QoS·SRV
QoS(i)+b
SRV-QoS
k
SRV-QoS≥0，b
SRV-QoS≥0，k
SRV-QoS+b
SRV-QoS≠0
Wherein, SRV
QoS(i) the FACH dispatching priority (FACH Schedule Priority) of expression UE, this value can be finished according to the professional RAB qos parameter mapping of UE by the RRM among the RNC; k
SRV-QoS, b
SRV-QoSExpression P
Schedlus(i) and SRV
QoS(i) parameter of composition linear relationship can be reflected in the relation on the scheduling ratio according to different QoS grades, carries out k
SRV-QoSAnd b
SRV-QoSSetting, thereby realize dynamically adjusting the purpose of scheduling ratio;
The scheduled throughput ratio of B, each UE is the relative priority ratio of each UE, promptly
P
Schedlue(i)：P
Schedlue(j)：P
Schedlue(k)：....，
If the buffer data size of the UE of each scheduling equates that so above-mentioned scheduled throughput ratio also just is equivalent to the scheduling times ratio of each UE.
3, guarantee that twice scheduling interval of each UE minimizes,, guarantee that simultaneously UE obtains scheduling in the AOA term of validity, with As soon as possible Promising Policy wave beam forming condition to reduce the data transmission delay of different fach dispatching priority UE.
When determining the UE of current TTI scheduling according to above-mentioned scheduling strategy, guaranteed conditions 1 and 3 on the other hand, is determined the UE of current TTI scheduling according to the scheduling ratio of determining in the condition 2 on the one hand.For example, have two UE for scheduling, the scheduling ratio of determining in the condition 2 is UE1:UE2=2:1, when then dispatching, and can be to UE1 scheduling twice continuously, again to UE2 scheduling 1 time.
In addition, relate to the calculating of the scheduled throughput ratio of each UE in the above-mentioned scheduling strategy, according to different UE and different QoS of survice requirements, this scheduled throughput ratio may be different.Therefore, need upgrade this scheduled throughput ratio, the concrete trigger condition of upgrading is:
1, finishes the scheduling of all UE in scheduling planning, for example, when existing two UE and scheduling ratio to be UE1:UE2=2:1, when finishing twice UE1 of continuous scheduling and dispatching a UE2, promptly finish scheduling planning one time;
2, activate UE information and change, promptly new UE is carried under the CELL_FACH state, perhaps is in nonactivated UE and transits to state of activation, and the UE that perhaps is in activation transits to unactivated state;
When above-mentioned two conditions are arbitrary when satisfying, can carry out the renewal of scheduled throughput ratio.
Step 209 judges whether current TTI can carry out wave beam forming, if can, then execution in step 210, otherwise return step 205.
In this step, the condition that judges whether to carry out wave beam forming is as follows:
A) whether the data volume of judging current UE satisfies the figuration requirement, and criterion is: the current transmission buffer data size of UE is greater than the data volume of the maximum TF form of DFACH support under the non-figuration pattern;
B) the figuration information of current UE before the deadline.
Have only above two conditions to satisfy simultaneously, just can carry out wave beam forming, execution in step 210; Otherwise return step 205.
Step 210, current TTI can be carried out wave beam forming, determines the TB number that DFACH can send according to the TF form of figuration pattern support and the TB number in the current DFACH transmission buffer queue.
When determining TB number that DFACH can send in this step, need carry out according to the TF form of figuration pattern support.Wherein, the TF form of figuration pattern support is to calculate in advance and be kept among the RNC.
Concrete, pre-determine the figuration gain of FACH, the transmitting power of each code channel of SCCPCH is reduced, concrete reduction amount is less than or equal to the figuration gain of described FACH; Then, according to the transmitting power after reducing and the maximum code channel number when not considering power limited, determine the maximum code channel number of supporting of SCCPCH under the figuration situation, maximum code channel number=min (maximum code channel number when not considering power limited of supporting, transmitting power after total transmitting power/reduction), wherein, the TS0 time slot is totally 16 code channels, other channels except that SCCPCH occupy 3 code channels, and the maximum code channel number of SCCPCH is 13 when not considering power limited; According to the described maximum code channel number of supporting, determine SCCPCH maximum transmission data amount under the figuration situation, the maximum TF form of figuration pattern DFACH support just specifically supports the TB number of code channel number, each code channel carrying and MAC PDU size to determine jointly by maximum.This maximum supports the code channel number to be kept among the RNC, and is configured to NodeB by CELL setup request.
RNC determines that according to the TF form of figuration pattern support and the TB number in the current DFACH transmission buffer queue mode of the TB number that DFACH can send is: TB number=min that DFACH can send (current TB number, the maximum TB number that DFACH supports under the figuration pattern).
Step 211 judges that according to above flow process RNC identifies current TTI and whether carries out wave beam forming in sending to the FP frame of NodeB.
Concrete, can be in the FP frame, represent figuration with 1,0 represents not figuration.
Step 212, RNC selects corresponding TFC form according to current all transmission channel established data amounts and TFCS form, issues the data and the data volume of scheduling this time to NodeB.
Through abovementioned steps, when not carrying out wave beam forming, utilize step 202,204 and 206 to determine the SCCPCH data quantity transmitted; When carrying out wave beam forming, utilize step 210 to determine the SCCPCH data quantity transmitted.In this step, select corresponding TFC form according to above-mentioned data volume and TFCS form, the data dispatching of determining is handed down to NodeB, notice NodeB carries out transfer of data, and carries in the data dispatching that issues and this time need data quantity transmitted.
It is concrete when RNC determines to carry out wave beam forming, this step is determined the actual code channel number of current SCCPCH according to data quantity transmitted, and utilize and to be carried at the actual code channel number that the transformat indication (TFI) that issues in the data will determine and to be transferred to NodeB, indicate the mode of actual code channel number by above-mentioned TFI, realize the dynamic-configuration of SCCPCH code channel, can maximally utilise the gain that the FACH figuration brings.
So far, the bag dispatching method flow process in the present embodiment finishes.When NodeB receives the data issue and determines not adopt wave beam forming, still continue to use existing mode and carry out data transmission.When determine adopting wave beam forming, after the data that the RNC that receives is issued are carried out wave beam forming, launch with the transmitting power that is pre-configured in after the reduction among the NodeB.
Concrete NodeB determine to adopt wave beam forming mode can for: the sign in the FP frame that issues according to RNC is determined to carry out wave beam forming, and notifies corresponding antenna; NodeB further resolves and therefrom extracts TFI with the data that RNC issues, if the indicated actual code channel number of TFI is during greater than the code channel number under the non-figuration pattern, the bottom module of NodeB determines to carry out wave beam forming, and encodes etc. according to the indicated TF form of this TFI; When if the indicated actual code channel number of TFI is less than or equal to code channel number under the non-figuration pattern, the bottom module of NodeB is determined not to carry out wave beam forming, and encode according to the TF form under the non-figuration pattern etc.
By the way as can be seen, bag dispatching method in the present embodiment, when satisfying the figuration requirement, can carry out wave beam forming to FACH, and by improved scheduling strategy, can make data dispatching satisfy the wave beam forming requirement when making packet scheduling as much as possible, simultaneously, provide dispatch service, again by dynamic-configuration to the SCCPCH code channel based on the QoS business need, make full use of the gain of wave beam forming, improved the throughput of FACH.
As previously mentioned, the purpose of flow control is to provide sufficient data volume for scheduling, therefore, the present invention is also by further improving the flow control strategy, the MAC_C entity that control is in UE under the state of activation sends buffer data size, thereby further guarantee the buffer data size abundance of UE, and then provide prerequisite for the FACH wave beam forming.
Embodiment below by two pairs of flow control flows of embodiment is described in detail.
Embodiment two:
In the present embodiment, in the flow control process, be that MAC_D distributes the buffer data size that issues to be called credit rating with MAC_C, will distribute the process of buffer data size to be also referred to as the credit rating assigning process.When the MAC_D of the arbitrary UE of correspondence initially when MAC_C issues data, the MAC_D of this UE sends the capacity application of the total data volume that comprises this transmission to MAC_C, this MAC_C distributes for MAC_D carries out credit rating according to the total data volume that comprises in the capacity application that receives; After this, initiatively initiate credit rating by MAC_C and distribute, MAC_D no longer carries out capacity application initiatively.Specifically the flow control process to each UE is all identical, and the flow control with a UE is that example describes below.
Fig. 3 is the particular flow sheet of flow control methods in the embodiment of the invention two.As shown in Figure 3, this method comprises:
Step 301, the initial credit degree assigning process of Flow Control module is triggered by the capacity application of the MAC_D of current UE, and after the Flow Control module was finished initially just distributing of credit rating, the triggering that whole credit rating is distributed was determined by MAC_C.
Step 302, MAC_C calculates the credit rating ratio of each UE according to the current relative priority that is in the UE of state of activation after the capacity application of receiving MAC_D.
Concrete, at first calculate the relative priority of each UE, identical among account form and the embodiment one, promptly
P
Schedlue(i)＝k
SRV-QoS·SRV
QoS(i)+b
SRV-QoS
k
SRV-QoS≥0，b
SRV-QoS≥0，k
SRV-QoS+b
SRV-QoS≠0
Wherein, SRV
QoS(i) the fach Schedule Priority of expression UE, this value is finished according to the professional RAB qos parameter mapping of UE by RRM; k
SRV-QoS, b
SRV-QoSExpression P
Schedlue(i) and SRV
QoS(i) parameter of composition linear relationship.
Then, according to the relative priority of UE, calculate the credit rating ratio of each UE, computing formula is as follows:
…：P
Schedlue(i)：P
Schedlue(j)：P
Schedlue(k)：....，
At last, the credit rating ratio is carried out normalization, suppose the FACH Schedule Priority minimum of i, then normalization is calculated as follows ...:
Step 303 is according to the normalization credit rating ratio of current UE and the data volume N in the corresponding MAC_C transmission of the current UE buffer memory
UE_Credit(i t) determines the available credit degree N of current distribution
Available_Credit(i, t).
When the available credit of calculating current distribution is spent, send data volume N in the buffer memory according to the corresponding MAC_C of current UE of the credit rating upper limit of the current UE that sets in advance and current UE
UE_Credit(i t) determines.
The mode that specifically sets in advance the credit rating upper limit of current UE is:
1, for being provided with, all UE send buffer memory minimum threshold N in advance
Min_TB=N
Max_TFN, described N
Max_TFBe SCCPCH maximum transmission data amount under the figuration situation, the maximum TF form of just supporting under the figuration pattern, this value can utilize the corresponding steps among the embodiment one to calculate, described N is a positive integer, the value of this N can be determined to the time delay that MAC_C issues data according to MAC_D, guaranteeing sufficient data being arranged in the UE buffer memory, and then provide prerequisite for the wave beam forming of FACH for scheduling;
2,,, the upper limit that issues data volume, i.e. the credit rating upper limit are set for each UE is corresponding according to the relative priority ratio of all UE to send the buffer memory minimum threshold; Concrete, can calculate according to the normalization credit rating that obtains in the step 302, be limited on the credit rating of current UE
Wherein, P
Schedlue(i) be the relative priority of the UE of FACH Schedule Priority minimum, P
Schedlue(j) be the relative priority of current UE.
After obtaining the credit rating upper limit of current UE by the way, calculate the available credit degree N of current distribution
Available_Credit(i t) is
Step 304 sends the credit rating assignment messages to the MAC_D of current UE, notifies the available credit degree that distributes into current UE.
In this step, can utilize the message between MAC_D and MAC_C to carry current available credit degree notice MAC_D.For example, can utilize message MAC-C-DATA-REQ to notify.
Step 305 is waited for the triggering once more of flow control, execution in step 302.
In this step, for reduce the information interaction between RNC internal mac _ C and MAC_D as far as possible, the trigger condition of flow control is as follows:
A) the current transmission buffer data size of UE is less than N
Min_TB
B) after last time, credit rating was distributed, receive the upper strata TB piece of respective number;
Preferably when above two conditions satisfy simultaneously, could trigger flow control once more; Flow control signal returns step 302 after arriving.
So far, the flow control flow process in the present embodiment finishes.By as seen above-mentioned, by above-mentioned flow control flow process, but guarantee the data dispatching abundance that provides for each UE, and carry out flow control according to the QoS business need, thereby for scheduling provides sufficient data volume, and then provide prerequisite for the FACH figuration.
Embodiment by the invention described above as can be seen, the present invention is on the basis of the factors such as priority level of the qos requirement of analysis-by-synthesis TSO power limited reason, SCCPCH data carried by data characteristics, FACH figuration gain, UE, UE, MAC_C dispatching algorithm based on the FACH figuration has been proposed, the gain that not only makes full use of the FACH figuration has solved the power limited problem of TSO, and guarantee the QoS demand of UE, for UE provides dispatch service based on QoS.
Determine according to SCCPCH carrying data characteristic whether different subframes carry out the FACH figuration, make full use of the gain that the FACH figuration brings, SCCPCH is carried out dynamic code channel resource configuration, select the TF form of FACH flexibly, not only improve the code channel resource utilance of TSO, and increased the throughput of FACH.Take into full account professional qos requirement and the factors such as priority level of UE, propose dispatch service, guarantee the qos requirement of different business and the priority of UE based on QoS.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1, the bag dispatching method during a kind of power limited is characterized in that this method comprises:
RNC disposes in NodeB in advance, reduces the transmitting power of each code channel of SCCPCH under the wave beam forming situation;
In the current TTI scheduling constantly, when having only DFACH to exist transmission data cached on the SCCPCH channel, RNC is among the UE of state of activation under the CELL_FACH at all according to default scheduling strategy, determines the UE of current TTI scheduling;
RNC judges when the buffer data size of the UE of current TTI scheduling satisfies figuration and requires, determine and data cached to NodeB issues the data volume of current TTI scheduling and the described current TTI that equates with this data volume is dispatched UE, notice NodeB carries out wave beam forming, and notice NodeB carries out the signal emission with the transmitting power after reducing under the pre-configured wave beam forming situation.
2, method according to claim 1 is characterized in that, describedly satisfies the figuration requirement and is: the data of only dispatching a UE in current TTI; And the figuration information of the UE of described current TTI scheduling is in the correlated time of channel.
3, method according to claim 1, it is characterized in that, the transmitting power that reduces each code channel of SCCPCH under the described wave beam forming situation is: pre-determine the figuration gain of FACH, the transmitting power reduction amount of described each code channel of SCCPCH is less than or equal to the figuration gain of described FACH.
4, method according to claim 1 is characterized in that, the transmitting power after described RNC will reduce when physical channel is reshuffled is configured among the NodeB.
5, method according to claim 1, it is characterized in that, this method further comprises: transmitting power after reducing according to SCCPCH under the figuration situation in advance and the maximum code channel number when not considering power limited, determine that the maximum code channel number of supporting of SCCPCH is kept among the RNC under the figuration situation, and when base station configuration, should maximum support the code channel number to be configured in the base station, RNC determines SCCPCH maximum transmission data amount under the figuration situation according to the described maximum code channel number of supporting;
Describedly determine that the data volume that issues the current TTI scheduling to NodeB is: the data volume that RNC determines described current TTI scheduling according to buffer data size and the described SCCPCH maximum transmission data amount of the UE of described current TTI scheduling.
6, method according to claim 5 is characterized in that, the data volume of described current TTI scheduling is the DFACH formation buffer data size of the UE of described current TTI scheduling and the minimum value in the described SCCPCH maximum transmission data amount.
According to claim 5 or 6 described methods, it is characterized in that 7, SCCPCH maximum transmission data amount is under the described figuration situation, at described maximum support code channel number now, the transmission block TB number of the common transmission of all SCCPCH code channels.
8, method according to claim 5, it is characterized in that, the maximum code channel number of supporting of SCCPCH is under the described figuration situation, and the transmitting power after the total transmitting power of antenna and the described reduction is to be amassed, the two minimum value of the maximum code channel number when not considering power limited.
9, method according to claim 5 is characterized in that, described RNC comprises to the data volume that NodeB issues the current TTI scheduling:
RNC selects corresponding TFC form according to the data volume and the TFCS form of the current TTI scheduling of determining, determine the actual code channel number of current SCCPCH, and utilize transformat indication TFI that the actual code channel number of the described definite current use of SCCPCH is transferred to NodeB.
10, method according to claim 1 is characterized in that, described RNC notice NodeB carries out wave beam forming and is: RNC identifies current TTI in sending to the FP frame of NodeB need carry out wave beam forming.
11, method according to claim 1 is characterized in that, described scheduling strategy is:
The preferential TB piece of in a TTI, dispatching a UE;
By the relative priority of all UE that determine according to the FACH priority of described all UE, determine the scheduled throughput ratio of each UE;
Guarantee that twice scheduling interval of each UE minimizes;
12, method according to claim 11 is characterized in that, determines that according to the FACH priority of arbitrary UE the relative priority of this UE is P
Schedlue=k
SRV-QoSSRV
QoS+ b
SRV-QoS, wherein, k
SRV-QoSAnd b
SRV-QoSBe constant more than or equal to 0, and k
SRV-QoS+ b
SRV-QoS≠ 0, SRV
QoSShine upon the FACH dispatching priority of this UE that obtains according to the professional radio bearer RAB service quality QoS parameter of described arbitrary UE for RNC.
13, method according to claim 11 is characterized in that, determines that the scheduled throughput ratio of each UE is: the ratio of the relative priority of each UE.
14, method according to claim 11, it is characterized in that, after the scheduling of finishing all UE described in scheduling planning, perhaps, after having new UE to be carried under the CELL_FACH state, perhaps, after having new UE to migrate out the CELL_FACH state, after the UE that perhaps is in the unactivated state under the CELL_FACH transits to state of activation, after the UE that perhaps is in the state of activation under the CELL_FACH transits to unactivated state, again by according to current all be in the relative priority that the FACH priority of the UE of the state of activation under the CELL_FACH is determined, determine the scheduled throughput ratio in the described scheduling strategy.
15, method according to claim 11, it is characterized in that, this method further comprises: according to the relative priority of described all UE, carry out the flow control of all UE, the buffer data size that divides orientation MAC_C to issue for the MAC_D of corresponding each UE according to described priority ratio.
16, method according to claim 15 is characterized in that,
The MAC_D of corresponding each UE is initially when MAC_C issues data, described MAC_D sends the capacity application of the total data volume that comprises this transmission to MAC_C, described MAC_C distributes the buffer data size that issues according to the total data volume that comprises in the described capacity application that receives for described MAC_D;
Perhaps, MAC_C initiatively distributes the buffer data size that issues for the MAC_D of corresponding each UE according to the flow control trigger mechanism.
17, method according to claim 16, it is characterized in that described flow control trigger mechanism is: send buffer data size less than the transmission buffer memory minimum threshold that sets in advance and received and be the data that buffer data size that MAC_D distributes equates last time at the MAC_C of UE correspondence.
18, method according to claim 15 is characterized in that, described MAC_D for corresponding each UE distributes the buffer data size that issues to comprise:
For being provided with, all UE send buffer memory minimum threshold N in advance
Min_TB=N
Max_TFN, described N
Max_TFBe SCCPCH maximum transmission data amount under the figuration situation, described N is a positive integer;
Based on described transmission buffer memory minimum threshold,, the upper limit that issues data volume is set for each UE is corresponding according to the relative priority ratio of all UE;
The described buffer data size that distributes for the MAC_D of corresponding each UE is the poor of the upper limit that issues data volume of corresponding UE and current transmission buffer data size.
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