CN101127541A - Selection method and device for transmission speed and modulation code in HSUPA - Google Patents
Selection method and device for transmission speed and modulation code in HSUPA Download PDFInfo
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Abstract
The utility model relates to a selection method of transmission rate and modulation code and the device, which comprises the following steps: a lowest and a highest transmission block threshold mapping relation is established to get the spread factors used by each transmission block under a certain time slot number and the corresponding modulation code mode; a power relative value mapping relation is established, and the biggest and the smallest values of the transmission block supported by QPSK and 16QAM modulation modes are acquired according to the dispatching information to determine the transmission block range; the power thresholds needed by the smallest value and the biggest value of each transmission block are calculated; the power threshold value proximal to the power permitted value within the power threshold range is selected, and the lowest and the highest transmission block threshold mapping relation is searched to get the supported biggest transmission block; the data quantity waiting for transmission in current cache is checked to determine the selected transmission block; based on the finally selected transmission block, the transmission format combination is set up, and the emission power value corresponding to the finally selected transmission block is calculated. Based on the base station dispatching information and under the premise of ensuring transmission quality, the utility model selects the highest transmission rate as soon as possible to decide the modulation mode and coding rate.
Description
Technical field
The present invention relates to the communications field, relate in particular to the system of selection and the device of transmission rate and modulating-coding among a kind of HSUPA.
Background technology
In order to improve up access capability, Frequency Division Duplexing (FDD) (FDD:Frequency Division Duplex) and time division duplex (TDD:Time Division Duplex) have been introduced up enhancing (Enhanced Uplink) technology at 3GPP Release6 and Release7 in succession.High speed uplink packet inserts (HSUPA, HighSpeed Uplink Package Access) inserts (HSDPA with high speed downlink packet, High SpeedDownlink Packet Access) similar, topmost key technology comprises in the up enhancement techniques: the NodeB fast dispatch, adaptive modulation and coding (AMC, Adaptive Modulation and Coding), mix automatic repeat requests (HARQ, Hybrid Automatic Repeat Request) etc.
As the AMC of up enhancement techniques, the problem that needs to solve comprises: select suitable transmission rate (E-TFC selection), according to transmission rate selecting modulation mode and encoding rate.
Rate selection method as the non-HSUPA business of one of prior art is described as follows:
The professional upstream rate system of selection of non-HSUPA is usually in a less speed set, according to the current maximum transmission power permissible value of terminal, carries out speed adjustment at a slow speed.According to the standard code of 3GPP related protocol, its main process is as follows:
At first define three kinds of combinations of transport formats (TFC, Transport Format Combination) state, promptly support, block, surpass power.Can change according to certain principle between these three kinds of states, as shown in Figure 1, the TFC that is in blocked state will be not selected, and terminal is by the selected transformat in E-TFCI indication base station.
Below, be example with LCR TDD, introduce and get rid of (Elimination), principle and the method recovering (Recovery) and block (Blocking).
1) gets rid of
If a certain given TFC satisfies following condition, then be excluded: measure in assessment cycle at continuous Y time, have the maximum transmit power value that satisfies the transmitting power estimated value of this TFC greater than the terminal permission X time at least.
After satisfying this condition, the bit rate that the MAC layer can indicate the logic high level channel to allow in 15ms.
Wherein,
The maximum transmission power that allows is obtained by following formula:
Maximum transmission power=MIN (the maximum uplink transmission power that UE is allowed to, UE maximum transmission power) that UE allows
The maximum uplink transmission power that allows can also be controlled by exterior ring power and be adjusted by radio network controller (RNC, Radio NetworkController) open Loop Power control decision when initially inserting.
TFC transmitting power appraisal procedure is: terminal physical layer periodic measurement current transmit power, and by reporting after layer 1 filtering.High-rise according to power that reports and current TFC, assess the transmitting power of current TFC and other TFC demands, wherein each TFC power demand can be preset a side-play amount.
2) recover
For a certain TFC, satisfy following condition, then can recover: in continuous Y measuring period, the transmitting power assessed value of a certain TFC is no more than the terminal maximum transmission power.
After the recovery, when TFC selects, can adopt this TFC.Media interviews controls (MAC, MediumAccess Control) can be notified the high-rise logic channel speed of adjusting at Tnotify in the time.
3) block
When a certain TFC satisfies following condition, this TFC will be set to block: a certain TFC is in above the power rating duration and reaches Tnotify, Tmodify and TL1_proc three's sum.
Wherein,
Tnotify equals 15ms;
TL1_proc equals 15ms;
Tmodify equal MAX (Tadapt_max, TTTI),
Tadapt_max equal MAX (Tadapt_1, Tadapt_2 ..., Tadapt_N), and N is the number of logic channel that need to adjust speed.
Tadapt_n equals the high-rise logic channel n needed time of speed of adjusting.For the AMP speech, this value is 40ms, and for the business that does not need to encode, this value is 0ms
TTTI equals the maximum uplink time interval (TTI, Transmission TimeInterval) of this TFC, and unit is ms.
Behind the obstruction, TFC will be not selected, and it is that bottom can adapt to, and also can avoid frequent adjustment speed simultaneously after guaranteeing that speed is adjusted that time delay is set.
Rate selection method as two HSDPA business of prior art is described as follows:
In HSDPA, adopted the AMC technology, system definition 64 kinds of (is example with LCR TDD) transformats, corresponding 64 kinds of transmission rates, terminal is according to the measurement of the quality of reception, feed back to BTS channel quality indication (CQI, Channel Quantity Indication) information, the base station is according to CQI information, for terminal is selected suitable transmission rate, to guarantee transmission rate and transmission quality requirements.
Uply with R5 different be, adopted the AMC technology among the HSDPA, the adjustable scope of transmission rate is very big; Transmission rate is according to the feedback channel quality rapid adjustment, rather than adjusts at a slow speed according to power situation.
As from the foregoing, in HSUPA, different with the professional upstream rate selection of non-HSUPA is:
(1) HSUPA adopts the shared channel scheduling, and transmission might not be continuous, and institute's scheduled resources also may change;
(2) HSUPA has adopted the AMC technology, and the scope that transmission rate changes very greatly;
(3) HSUPA needs the variation of rapid adjustment with adaptive channel variation and base station scheduling resource.
In HSUPA, different with the professional upstream rate selection of HSDPA is:
(1) HSUPA uplink transmission power and physical resource are indicated by base station scheduling, are fast-changing;
(2) base station can't provide the indication of channel quality information, just can distribute power and channel resource according to different channel qualities;
(3) the up Poewr control method that has adopted closed loop and open loop of HSUPA is to guarantee the consistency of base station received power and scheduling power.
According to above difference, there is following shortcoming in the upstream rate choice mechanism of the non-HSUPA business of one of prior art:
1, owing to changed slowly, is not suitable for the AMC demand of HSUPA.
2,, judge that based on historical power and transmission block information method that whether TFC supports is not suitable for the situation of 64 kinds of speed because optional state number is few.
3, need among the HSUPA to judge whether flexibly to support that the rate selection method of non-HSUPA business does not address this problem according to schedule information.
4, HSUPA also needs to select speed according to the physical resource of scheduling, and from multiple modulating-coding rate options, selects suitable modulating-coding speed, and the scheduling of non-HSUPA does not address this problem.
And there is following shortcoming in the rate selection method of two HSDPA business of prior art:
1, the HSUPA power that obtains dispatching and resource are in quick variation, and HSDPA is then constant substantially, and the mode of its CQI indication is not suitable for HSUPA.
2, it does not have to solve the problem of how to carry out rate selection under the situation that does not have CQI.
Summary of the invention
The technical problem to be solved in the present invention is to provide the system of selection and the device of transmission rate and modulating-coding among a kind of HSUPA, can be according to base station scheduling information, guarantee under the prerequisite of transmission quality, select the highest transmission rate as far as possible fast, thus decision modulation system and encoding rate.
The technical scheme that realizes the object of the invention is as follows:
The system of selection of a kind of transmission rate and modulating-coding comprises step:
Relevant minimum of A, foundation and number of time slot, spread spectrum code resources, modulation system and high-transmission piece thresholding mapping relations therefrom obtain various transmission blocks use under certain time slot number spreading factor and corresponding modulation coding mode;
B, set up the power relative value mapping relations of various transmission blocks under different resource, therefrom obtain transmission block maximum and the minimum value that the different modulating mode is supported respectively, determine the transmission block scope according to schedule information;
C, calculate the power threshold that each transmission block maximum and minimum value need;
D, judge that power permissible value in the described schedule information is whether in described power threshold scope, if, then select and the immediate power threshold of this power permissible value, search described minimum and high-transmission piece thresholding mapping relations acquisition the maximum transmitted piece that can support; Otherwise improve the spreading factor value, continue step C;
Data volume size waiting for transmission in E, the inspection current cache if be lower than the transmission block maximum, is then selected the minimum transfer piece more than or equal to cache occupation amount; Otherwise select the maximum transmitted piece;
F, the final transmission block of selecting of basis are provided with combinations of transport formats and calculate this finally transmission power level of the transmission block correspondence of selection.
Preferably, described transmission block size is divided into multiple grade, and representative value is 64 kinds or 128 kinds.
Preferably, described modulation system is QPSK and 16QAM.
Preferably, set up minimum according to following steps and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 64 kinds of grades, is designated as [TB0, TB63], wherein adopt the geometric ratio mode to divide between the TB1 to TB63;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB63 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
Preferably, set up minimum according to following steps and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 128 kinds of grades, is designated as [TB0, TB127], wherein adopt the geometric ratio mode to divide between the TB1 to TB127;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB127 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
Preferably, the encoding rate scope of described QPSK support is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
Preferably, adopt Orthogonal Variable Spreading Factor OVSF, spreading factor is 1,2,4,8,16; Number of time slot is 1,2,3,4,5, and the transmission block of different number of time slot correspondences varies in size.
Preferably, in the described power relative value mapping relations, provide some kinds of typical transmission piece desired power relative values of various resource correspondences, the power relative value of other transmission blocks adopts linear difference.
Preferably, calculate transmission power level: P according to following formula
TB_Tx=P
E-base+ L+ β
TB_Tx+ K
E-PUCH
Wherein, P
TB_TxThe transmission power level of the transmission block correspondence of selecting, P
E-baseBe the benchmark received power, L is the path loss that terminal measures, β
TB_TxBe the transmitting power relative value of setting according to the combinations of transport formats that is provided with, K
E-PUCHAccording to the MAC entity quality of service characteristic of handling dedicated channel, the power excursion of setting.
In addition, the present invention also provides the choice device of a kind of transmission rate and modulating-coding, comprising:
First memory cell is used to store relevant with number of time slot, spread spectrum code resources, modulation system minimum and high-transmission piece thresholding mapping relations, is used for therefrom obtaining spreading factor and the corresponding modulation coding mode that various transmission blocks use under certain time slot number;
Second memory cell is used to store the power relative value mapping relations of various transmission blocks under different resource, is used for therefrom obtaining transmission block maximum and the minimum value that the different modulating mode is supported respectively according to schedule information, determines the transmission block scope;
The transmission block selected cell is used to calculate the power threshold of each transmission block maximum and minimum value needs; Judge that power permissible value in the schedule information whether in described power threshold scope, if not in this scope, then improve the spreading factor value, recomputates power threshold;
Select with this scope in the immediate power threshold of power permissible value, search minimum and high-transmission piece thresholding mapping relations acquisition the maximum transmitted piece that can support;
Check data volume size waiting for transmission in the current cache,, then select minimum transfer piece more than or equal to cache occupation amount if be lower than the transmission block maximum; Otherwise select the maximum transmitted piece;
Power calculation unit is used for the transmission block according to final selection, combinations of transport formats is set and calculates this finally transmission power level of the transmission block correspondence of selection.
Preferably, described transmission block size is divided into multiple grade, and representative value is 64 kinds or 128 kinds.
Preferably, described modulation system is QPSK and 16QAM.
Preferably, set up minimum in the following manner and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 64 kinds of grades, is designated as [TB0, TB63], wherein adopt the geometric ratio mode to divide between the TB1 to TB63;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB63 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
Preferably, set up minimum in the following manner and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 128 kinds of grades, is designated as [TB0, TB127], wherein adopt the geometric ratio mode to divide between the TB1 to TB127;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB127 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
Preferably, the encoding rate scope of described QPSK support is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
Preferably, adopt Orthogonal Variable Spreading Factor OVSF, spreading factor is 1,2,4,8,16; Number of time slot is 1,2,3,4,5, and the transmission block of different number of time slot correspondences varies in size.
Preferably, in the described power relative value mapping relations, provide some kinds of typical transmission piece desired power relative values of various resource correspondences, the power relative value of other transmission blocks adopts linear difference.
Preferably, described power calculation unit is calculated transmission power level: P according to following formula
TB_Tx=P
E-base+ L+ β
TB_Tx+ K
E-PUCH
Wherein, P
TB_TxThe transmission power level of the transmission block correspondence of selecting, P
E-baseBe the benchmark received power, L is the path loss that terminal measures, β
TB_TxBe the transmitting power relative value of setting according to the combinations of transport formats that is provided with, K
E-PUCHAccording to the MAC entity quality of service characteristic of handling dedicated channel, the power offset values of setting.
Compared with prior art, technical scheme provided by the invention has following beneficial effect:
The present invention can guarantee under the prerequisite of transmission quality in conjunction with power control and base station scheduling technology, selects the highest transmission rate as far as possible; Select the transmission block of Minimum requirements simultaneously in conjunction with the Buffer data amount information, do not waste ascending power, reduce uplink interference.This method is being carried out E-TFC when selecting, and the power resource and the physical channel resources that allow according to scheduling, and take into full account the characteristics of system interference guarantee to select the transmission block of the maximum possible that can correctly be received.When rate selection, also combine the current information transmitted amount that needs, the QOS demand of transmission information, and information such as maximum transmission power ability.Because among the HSUPA, support QPSK and two kinds of adjustment modes of 16QAM, encoding rate changes within the specific limits, so in selected transmission rate, provided optimum modulation coding mode, with the assurance transmission quality of maximum possible.
Below in conjunction with the drawings and specific embodiments the present invention is further described.
Description of drawings
Fig. 1 is a prior art TFC state exchange schematic diagram;
Fig. 2 is the flow chart of HSUPA terminal transmission speed of the present invention and modulating-coding system of selection;
Fig. 3 is HSUPA terminal transmission speed of the present invention and modulating-coding choice device block diagram.
Embodiment
The present invention proposes a kind of terminal equipment according to schedule information, select E-TFC, and the method for corresponding modulation system and encoding rate.This method is being carried out E-TFC when selecting, and the power resource and the physical channel resources that allow according to scheduling, and take into full account the characteristics of system interference guarantee to select the transmission block of the maximum possible that can correctly be received.When rate selection, also combine the current information transmitted amount that needs, the QOS demand of transmission information, and information such as maximum transmission power ability.Because among the HSUPA, support QPSK and two kinds of adjustment modes of 16QAM, encoding rate changes within the specific limits, so in selected transmission rate, provided optimum modulation coding mode, with the assurance transmission quality of maximum possible.
At first, introduce power permissible value and the physical resource that uplink scheduling is distributed to terminal.
In HSUPA, the maximum received power value P that allows of terminal is distributed in order to control the ascending power load in the base station
Rxt, scheduler module is lower than the criterion of a uplink load thresholding to the summation of local area and adjacent area received power based on up each terminal when this value of decision.After distributing power resource, need to distribute physical channel resources, a kind of typical distribution method is exactly the power resource that obtains according to each terminal of local area, and proportional distribution physical channel resources is to reach the coupling of power and physical resource.To the TDD system, the physical resource that distributes comprises the number of time slot that takies, and the Orthogonal Variable Spreading Factor OVSF on each time slot (OVSF, Orthogonal Variable Spreading Factor) code channel resource, require each time slot to have identical spreading factor usually.
Commonly used open loop+closed loop among the HSUPA is aided with the Poewr control method of outer shroud, its objective is the consistency that guarantees received power and scheduling power, and the interference level that guarantees network is in the scope of control.
In HSUPA, in order to improve uplink throughput as far as possible, guarantee system interference simultaneously, always wish the up load thresholding that reaches setting that can try one's best, just received total wideband power P
Rwb=N
oRoT
ThdBut this power can be according to the demand of uplink service load, and the variation of disturbing with the adjacent area changes; The path loss of terminal also becomes when taking place simultaneously.So need to adopt closed power control, to catch up with the variation that path loss changes and disturbs.Because the noncontinuity of scheduling, the base station is difficult in time obtain the path loss variable quantity of terminal, so the relative value of the expectation received power often of terminal is issued in scheduling, rather than the transmitting power of regulation, like this, terminal can be carried out the power adjustment of open loop according to the variation of path loss.
In addition, E-TFC selects according to the maximal received power value of scheduling in last guild, and selects transmitting power according to the E-TFC that selects.So, need set transmitting power relative value β according to the E-TFC that selects
e
Because different business is to the demand difference of Block Error Rate, so when setting up link, network side can be according to the MAC entity (MAC-d that handles dedicated channel, MAC entity handling dedicatedchannels) the quality of service characteristic is provided with a power offset values.Terminal is provided with power excursion K to physical layer behind the corresponding MAC-d stream of this emission of decision
E-PUCH
To sum up, the transmitting power of terminal is made of four parts, as shown in the formula:
P
E-PUCH＝P
e-base+L+β
e+K
E-PUCH；
Wherein:
L is the path loss that terminal measures.
Pe-base: on initial expectation received power basis, the benchmark received power that control obtains through closed power.
P
e-base＝PRX
des_base+step*∑TPC＝PRX
des_base+P
TPC
PRX
Dse_baseWhen setting up for Radio Link, the benchmark expectation reception carrier power that the RRC signaling sends.
Below, be example with HSUPA, describe the TBS of 64 kinds of E-TFC correspondences and main design principle in detail.
At first, be example with LCR TDD HSUPA, method for designing and the principle of TBS is described:
1, the size of transmission block adopts geometric sequence, and in order to guarantee certain efficiency of transmission (Padding leads and is lower than a certain value), the grade of TB Size is 64 kinds.
2, only transmitting basic information, when not having transfer of data, the minimum transmission block of definition is TB0, not necessarily satisfies the geometric ratio relation between TB0 and the TB1.
3, up employing OVSF, spreading factor (SF, Spread Factor) can be 1,2,4,8,16, and number of time slot can be 1,2,3,4,5, and the transmission block of different time slot (TS, Time Slot) number correspondence varies in size.
4, in order to guarantee code efficiency, minimum encoding rate is R1, and high energy gets at 1; Can adopt two kinds of modulation systems of 16QAM and QPSK, for the optimization of modulating-coding, the range of code rates that QPSK supports is from R1 to Rthd, and the range of code rates that 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1 can obtain according to emulation and empirical data.
5, in order to guarantee MAC-E protocol Data Unit (PDU, protocol data unit) Header, basic expense such as CRC and a minimum rate requirement, define minimum TBR1, according to different number of time slot, adopt maximum spreading factor (SF=16), QPSK, during the R1 encoding rate, corresponding transmission block TBC1.TBC1＞TBR1, then TB1=TBC1; Otherwise, TB1=TBR1.
6, according to this number of time slot maximum resource SF=1, maximum modulation mode 16QAM, the highest code check 1 can obtain maximum transmission block TB63.
7, remaining transmission block geometric ratio between TB1 and TB63 changes.
Based on above method, can set up one 64 * 5 TB Size form.
Need to prove:
1, the mode of setting up form just realizes a kind of typical concrete mode of mapping relations, and the present invention is not limited thereto;
2, the transmission block size can be divided into multiple grade, and representative value is 64 kinds or 128 kinds, because its set-up mode is identical, so can repeat no more with reference to 64 kinds explanation herein.
Below, based on above scheduling, the method for designing of power control and TBS provides the method that E-TFC selects, and modulation system and encoding rate are determined method accordingly.As shown in Figure 2, concrete steps are as follows:
Table 1:
| OVSF | Modulation system | Type | TS1 | TS2 | TS3 | TS4 | TS5 |
| 16 | QPSK | Min | TBMin(0，0，0) | TBMin(1，0，0) | --- | --- | TBMin(1，0，0) |
| Max | TBMax(0，0，0) | TBMax(1，0，0) | --- | --- | TBMax(1，0，0) | ||
| 16QAM | Min | TBMin(0，0，1) | --- | --- | --- | --- |
| Max | TBMax(0，0，1) | --- | --- | --- | --- | ||
| 8 | QPSK | Min | TBMin(0，1，0) | --- | --- | --- | --- |
| Max | TBMax(0，1，0) | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| Max | --- | --- | --- | --- | --- | ||
| 4 | QPSK | Min | --- | --- | --- | --- | --- |
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| Max | --- | --- | --- | --- | --- | ||
| 2 | QPSK | Min | --- | --- | --- | --- | --- |
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| --- | --- | --- | --- | --- | |||
| 1 | QPSK | Min | --- | --- | --- | --- | --- |
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | TBMin(0，4，1) | --- | --- | --- | TBMin(4，4，1) | |
| Max | TBMax(0，4，1) | --- | --- | --- | TBMax(4，4，1) |
Annotate: in upward showing "---" be ellipsis.
Step 202 according to last table 1, can obtain under certain time slot number, 64 kinds of operable OVSF resources of transmission block and corresponding modulation coding mode.As shown in table 2 below.
Table 2:
| The TB sequence number | OVSF16 | OVSF8 | OVSF4 | OVSF2 | OVSF1 | |||||
| M | R | M | R | M | R | M | R | M | R | |
| 0 | 16A QM | R(0，0) | QPS K | R(0，1) | / | / | / | / | / | / |
| 1 | 16A QM | R(1，0) | QPS K | R(1，1) | / | / | / | / | / | / |
| 2 | 16A QM | R(2，0) | QPS K | R(2，1) | / | / | / | / | / | / |
| | | | | | | | | | | |
| 30 | / | / | / | / | 16QA M | R(30，2) | QPS K | R(30，3) | QPSK | R(30，4) |
| | | | | | | | | | | |
| 63 | / | / | / | / | / | / | / | / | 16QA M | R(63，4) |
Annotate: go up that " " be ellipsis in the table, "/" for not supporting, under together.
Step 203 is set up various transmission blocks under the different resource of correspondence, reaches the power relative value of the needed signal-to-noise target value correspondence of a certain quality requirement (as the fast rate of 10% mistake).As shown in table 3 is example under a certain number of time slot.
Table 3
| The TB sequence number | OVSF16 | OVSF8 | OVSF4 | OVSF2 | OVSF1 |
| 0 | β(0，0) | β(0，1) | / | / | / |
| 1 | β(1，0) | β(1，1) | / | / | / |
| 2 | β(2，0) | β(2，1) | / | / | / |
| | | | | | |
| 30 | / | / | β(30，2) | β(30，3) | β(30，4) |
| | | | | | |
| 63 | / | / | / | / | β(63，4) |
Excessive for fear of list data, can provide several typical transmission piece desired power relative values of various resource correspondences, the power relative value of other transmission blocks adopts the method for linear difference, and is as shown in table 4.
Table 4
| OVSF | Modulation type | Type | TS1 | TS2 | TS3 | TS4 | TS5 |
| 16 | QPSK | Min | βMin(0，0，0) | βMin(1，0，0) | --- | --- | βMin(4，0，0) |
| T1 | βT1(0，0，0) | βT1(1，0，0) | --- | --- | βT1(4，0，0) | ||
| Max | βMax(0，0，0) | βMax(1，0，0) | --- | --- | βMax(4，0，0) | ||
| 16QAM | Min | βMin(0，0，1) | --- | --- | --- | --- | |
| T1 | βT1(0，0，1) | --- | --- | --- | --- |
| Max | βMax(0，0，1) | --- | --- | --- | --- | ||
| 8 | QPSK | Min | βMin(0，1，0) | --- | --- | --- | --- |
| T1 | βT1(0，1，0) | --- | --- | --- | --- | ||
| Max | βMax(0，1，0) | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| T1 | --- | --- | --- | --- | --- | ||
| Max | --- | --- | --- | --- | --- | ||
| 4 | QPSK | Min | --- | --- | --- | --- | --- |
| T1 | --- | --- | --- | --- | --- | ||
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| T1 | --- | --- | --- | --- | --- | ||
| Max | --- | --- | --- | --- | --- | ||
| 2 | QPSK | Min | --- | --- | --- | --- | --- |
| T1 | --- | --- | --- | --- | --- | ||
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | --- | --- | --- | --- | --- | |
| T1 | --- | --- | --- | --- | --- | ||
| 1 | QPSK | Min | --- | --- | --- | --- | --- |
| T1 | --- | --- | --- | --- | --- | ||
| Max | --- | --- | --- | --- | --- | ||
| 16QAM | Min | βMin(0，4，1) | --- | --- | --- | βMin(4，4，1) | |
| T1 | βT1(0，4，1) | --- | --- | --- | βT1(4，4，1) | ||
| Max | βMax(0，4，1) | --- | --- | --- | βMax(4，4，1) |
Step 205 is according to the table of power relative value, in conjunction with the K among the current HARQ Profile
E-PUCHValue, the performance number that each thresholding TB needs in the calculation procedure 204.
Computing formula is: P
TB=P
E-base+ L+ β
TB+ K
E-PUCH
Step 207 improves the spreading factor value, continues step 205, to arriving SF=16.If the minimum transmission block of SF=16 can't support that also then this is with power delivery TB0 of scheduling permission.
Step 208 is checked the size after data volume waiting for transmission (BO, Buffer Occupancy) is according to MAC-E PDU form coding in the current cache, if BO is lower than TB_Max, then the transmission block of Xuan Zeing is the minimum transfer piece TB_Tx more than or equal to BO; Otherwise TB_Tx=TB_Max.
Because top system of selection explanation to transmission rate and modulation system and encoding rate is more detailed, its corresponding choice device is described as follows below again, instantiation and form see also aforementioned content, repeat no more herein.
As shown in Figure 3, this device can be arranged in the AMC module of mobile communication terminal device, comprises first memory cell, 31, the second memory cell 32, and transmission block selected cell 33, and power calculation unit 34 are specific as follows:
Transmission block selected cell 33 comprises following function:
According to the power relative value table of second memory cell, 32 storages, in conjunction with the K among the current HARQ Profile
E-PUCHValue is calculated the performance number that each thresholding TB needs, and computing formula is: P
TB=P
E-base+ L+ β
TB+ K
E-PUCH
Judge that power permissible value in the schedule information whether in described power threshold scope, if not in this scope, then improve the spreading factor value, recomputates power threshold.
Select with this scope in the immediate power threshold of power permissible value, table look-up obtain the maximum transmitted piece that can support; Check data volume size waiting for transmission in the current cache,, then select minimum transfer piece more than or equal to cache occupation amount if be lower than the transmission block maximum; Otherwise select the maximum transmitted piece.
Wherein, P
TB_TxThe transmission power level of the transmission block correspondence of selecting, P
E-baseBe the benchmark received power, L is the path loss that terminal measures, β
TB_TxBe the transmitting power relative value of setting according to the combinations of transport formats that is provided with, K
E-PUCHAccording to the MAC entity quality of service characteristic of handling dedicated channel, the power offset values of setting.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (20)
1. the system of selection of transmission rate and modulating-coding is characterized in that, comprises step:
Relevant minimum of A, foundation and number of time slot, spread spectrum code resources, modulation system and high-transmission piece thresholding mapping relations therefrom obtain various transmission blocks use under certain time slot number spreading factor and corresponding modulation coding mode;
B, set up the power relative value mapping relations of various transmission blocks under different resource, therefrom obtain transmission block maximum and the minimum value that the different modulating mode is supported respectively, determine the transmission block scope according to schedule information;
C, calculate the power threshold that each transmission block maximum and minimum value need;
D, judge that power permissible value in the described schedule information is whether in described power threshold scope, if, then select and the immediate power threshold of this power permissible value, search described minimum and high-transmission piece thresholding mapping relations acquisition the maximum transmitted piece that can support; Otherwise improve the spreading factor value, continue step C;
Data volume size waiting for transmission in E, the inspection current cache if be lower than the transmission block maximum, is then selected the minimum transfer piece more than or equal to cache occupation amount; Otherwise select the maximum transmitted piece;
F, the final transmission block of selecting of basis are provided with combinations of transport formats and calculate this finally transmission power level of the transmission block correspondence of selection.
2. the method for claim 1 is characterized in that, described transmission block size is divided into multiple grade, and representative value is 64 kinds or 128 kinds.
3. the method for claim 1 is characterized in that, described modulation system is QPSK and 16QAM.
4. as claim 2 or 3 described methods, it is characterized in that, set up minimum and high-transmission piece thresholding mapping relations according to following steps:
The transmission block size is divided into 64 kinds of grades, is designated as [TB0, TB63], wherein adopt the geometric ratio mode to divide between the TB1 to TB63;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB63 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
5. method as claimed in claim 4 is characterized in that, the encoding rate scope that described QPSK supports is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
6. as claim 2 or 3 described methods, it is characterized in that, set up minimum and high-transmission piece thresholding mapping relations according to following steps:
The transmission block size is divided into 128 kinds of grades, is designated as [TB0, TB127], wherein adopt the geometric ratio mode to divide between the TB1 to TB127;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB127 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
7. method as claimed in claim 6 is characterized in that, the encoding rate scope that described QPSK supports is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
8. the method for claim 1 is characterized in that, adopts Orthogonal Variable Spreading Factor OVSF, and spreading factor is 1,2,4,8,16; Number of time slot is 1,2,3,4,5, and the transmission block of different number of time slot correspondences varies in size.
9. the method for claim 1 is characterized in that, in the described power relative value mapping relations, provides some kinds of typical transmission piece desired power relative values of various resource correspondences, and the power relative value of other transmission blocks adopts linear difference.
10. the method for claim 1 is characterized in that, calculates transmission power level: P according to following formula
TB_Tx=P
E-base+L+ β
TB_Tx+ K
E-PUCH
Wherein, P
TB_TxThe transmission power level of the transmission block correspondence of selecting, P
E-baseBe the benchmark received power, L is the path loss that terminal measures, β
TB_TxBe the transmitting power relative value of setting according to the combinations of transport formats that is provided with, K
E-PUCHAccording to the MAC entity quality of service characteristic of handling dedicated channel, the power excursion of setting.
11. the choice device of transmission rate and modulating-coding is characterized in that, comprising:
First memory cell is used to store relevant with number of time slot, spread spectrum code resources, modulation system minimum and high-transmission piece thresholding mapping relations, is used for therefrom obtaining spreading factor and the corresponding modulation coding mode that various transmission blocks use under certain time slot number;
Second memory cell is used to store the power relative value mapping relations of various transmission blocks under different resource, is used for therefrom obtaining transmission block maximum and the minimum value that the different modulating mode is supported respectively according to schedule information, determines the transmission block scope;
The transmission block selected cell is used to calculate the power threshold of each transmission block maximum and minimum value needs; Judge that power permissible value in the schedule information whether in described power threshold scope, if not in this scope, then improve the spreading factor value, recomputates power threshold;
Select with this scope in the immediate power threshold of power permissible value, search minimum and high-transmission piece thresholding mapping relations acquisition the maximum transmitted piece that can support;
Check data volume size waiting for transmission in the current cache,, then select minimum transfer piece more than or equal to cache occupation amount if be lower than the transmission block maximum; Otherwise select the maximum transmitted piece;
Power calculation unit is used for the transmission block according to final selection, combinations of transport formats is set and calculates this finally transmission power level of the transmission block correspondence of selection.
12. device as claimed in claim 11 is characterized in that, described transmission block size is divided into multiple grade, and representative value is 64 kinds or 128 kinds.
13. device as claimed in claim 11 is characterized in that, described modulation system is QPSK and 16QAM.
14. as claim 12 or 13 described devices, it is characterized in that, set up minimum in the following manner and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 64 kinds of grades, is designated as [TB0, TB63], wherein adopt the geometric ratio mode to divide between the TB1 to TB63;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB63 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
15. device as claimed in claim 14 is characterized in that, the encoding rate scope that described QPSK supports is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
16. as claim 12 or 13 described devices, it is characterized in that, set up minimum in the following manner and high-transmission piece thresholding mapping relations:
The transmission block size is divided into 128 kinds of grades, is designated as [TB0, TB127], wherein adopt the geometric ratio mode to divide between the TB1 to TB127;
Described TB0 does not transmit data, the minimum transfer piece when only transmitting essential information;
Described TB1 obtains in the following manner:
If TBC1 is greater than TBR1, then TB1 is TBC1; Otherwise TB1 is TBR1; Wherein: R1 is minimum encoding rate, and R1 is smaller or equal to 1; TBR1 is the transmission block of R1 correspondence; TBC1 is according to different number of time slot, adopts maximum spreading factor, QPSK modulation system, the transmission block of R1 correspondence;
Described TB127 is according to minimal frequency spreading factor, 16QAM modulation system, the maximum transmitted piece of high code-rate 1.
17. device as claimed in claim 16 is characterized in that, the encoding rate scope that described QPSK supports is from R1 to Rthd; The encoding rate scope that described 16QAM supports is from Rthd/2 to 1; Wherein, Rthd＜1.
18. device as claimed in claim 11 is characterized in that, adopts Orthogonal Variable Spreading Factor OVSF, spreading factor is 1,2,4,8,16; Number of time slot is 1,2,3,4,5, and the transmission block of different number of time slot correspondences varies in size.
19. device as claimed in claim 11 is characterized in that, in the described power relative value mapping relations, provides some kinds of typical transmission piece desired power relative values of various resource correspondences, the power relative value of other transmission blocks adopts linear difference.
20. device as claimed in claim 11 is characterized in that, described power calculation unit is calculated transmission power level: P according to following formula
TB_Tx=P
E-base+ L+ β
TB_Tx+ K
E-PUCH
Wherein, P
TB_TxThe transmission power level of the transmission block correspondence of selecting, P
E-baseBe the benchmark received power, L is the path loss that terminal measures, β
TB_TxBe the transmitting power relative value of setting according to the combinations of transport formats that is provided with, K
E-PUCHAccording to the MAC entity quality of service characteristic of handling dedicated channel, the power offset values of setting.
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