CN101808393B - Transport format combination selection method and device - Google Patents

Abstract

The invention provides a transport format combination selection method and device. The method includes that: bit rate metric value of each transport format combination in a transport format combination set corresponding to the current coding combination transmission channel is calculated; maximum and minimum transport format combinations in the transport format combination set are determined; whether transport format combination is required to be reselected is judged according to average transmitted power of the current transport format combination in the maximum transmission time interval, available transmitted power and the maximum and minimum transport format combinations; when transport format combination is determined to be reselected, a transport format combination subset is determined according to the bit rate metric value of the current transport format combination; and the current transport format combination is reselected from the transport format combination subset according to data volume to be transmitted by radio link control layer and priority of logical channel. The invention can effectively improve antijamming capability of link.

Description

A kind of transport format combination selecting method and device

Technical field

The invention belongs to wireless communication field, particularly relate to a kind of transport format combination selecting method and device.

Background technology

Compare with the wireless access system of 2G, 3GPP has increased a new concept in the wireless access system of its 3G, that is, coded combination transmission channel (CCTrCH), it is combined by a plurality of transmission channels (TrCH).In each transmission channel, comprise multiple transformat (TF), in a CCTrCH, the various transformats of each transmission channel become a transport format combination set (TFCS) according to the agreement composition of relations.Transmitting terminal need select a kind of transformat combination (TFC) to control the effective data rate of each transmission channel in eating dishes without rice or wine in transport format combination set when eating dishes without rice or wine to send data.

3GPP25.321 the middle handling process that defines transport format combination selection is described in detail and how to be selected transformat combination according to the priority of wireless chain control layer (RLC) data volume size waiting for transmission and logic channel from transport format combination set.Prior art is when selecting transformat combination, do not consider the power capability of transmitting terminal, and code division multiple access (CDMA) system is an interference-limited system, the power of transmitting terminal is always limited, when the transmitted power of a CCTrCH reaches limited maximum transmit power, receiving terminal can not allow each transmission channel of CCTrCH reach the requirement of QoS by the adjustment of closed loop power control system, cause the data decode mistake, stagger the time and work as the mass data solution, can cause current link step-out, thereby cause call drop, this situation is particularly evident in the situation performance of network coverage deficiency.As seen, carry out transport format combination selection according to existing method, antijamming capability of link is lower.

Summary of the invention

Technical problem to be solved by this invention provides a kind of transport format combination selecting method and device, to improve the link antijamming capability.

For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:

A kind of transport format combination selecting method comprises:

The bit rate metric of every kind of transformat combination in the transport format combination set of calculating present encoding combination of transmitted channel correspondence;

Determine maximum, minimum transfer format combination in the described transport format combination set according to the priority of the data transmission state of wireless chain control layer and logic channel;

Priority according to wireless chain control layer data volume size waiting for transmission and logic channel is selected current transformat combination from described transport format combination set;

Calculate average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval;

Judge whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination;

When determining to need the gravity treatment transformat combination, determine transport format combination subset according to the bit rate metric of current transformat combination;

Priority current transformat combination of gravity treatment from described transport format combination subset according to wireless chain control layer data volume size waiting for transmission and logic channel.

Above-mentioned transport format combination selecting method, wherein, described bit rate metric is:

The bit number that transformat combination is transmitted in a radio frames, perhaps, the gain factor of transformat combination correspondence.

Above-mentioned transport format combination selecting method, wherein, describedly determine that according to the data transmission state of wireless chain control layer and the priority of logic channel maximum, minimum transfer format combination in the described transport format combination set comprise:

Maximum tfc is set to: the transformat combination of the bit rate metric maximum in the described transport format combination set;

The minimum transfer format combination is set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

Above-mentioned transport format combination selecting method, wherein, average transmitting power and the available transmit power of the current transformat combination of described calculating in the maximum transmission time interval comprises:

Calculate current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power;

Calculate current transformat combination each in the maximum transmission time interval and activate the transmitted power of other coded combination transmission channels of time slot, obtain minimum transmit power wherein, and calculate the poor of transmitting terminal time slot maximum transmit power and described minimum transmit power, obtain described available transmit power.

Above-mentioned transport format combination selecting method wherein, describedly judges whether that according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination needs gravity treatment transformat combination comprises:

When described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination;

When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc.

Above-mentioned transport format combination selecting method, wherein, described bit rate metric according to current transformat combination determines that transport format combination subset comprises:

When needs reduce transformat combination, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described first transformat combination, obtained described transport format combination subset;

When needs improve transformat combination, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described second transformat combination, obtained described transport format combination subset.

A kind of transport format combination selection device comprises:

Bit rate metric computing module be used for to calculate the bit rate metric of every kind of transformat combination of the transport format combination set of present encoding combination of transmitted channel correspondence;

Minimax transformat combination determination module is used for determining according to the priority of the data transmission state of wireless chain control layer and logic channel maximum, the minimum transfer format combination of described transport format combination set;

The transport format combination selection module is used for selecting current transformat combination according to the priority of wireless chain control layer data volume size waiting for transmission and logic channel from described transport format combination set;

Power computation module is used for calculating average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval;

Judge module is used for judging whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination;

The transmission format subset determination module is used for determining transport format combination subset according to the bit rate metric of current transformat combination when determining to need the gravity treatment transformat combination;

Described transport format combination selection module also is used for, according to priority current transformat combination of gravity treatment from described transport format combination subset of wireless chain control layer data volume size waiting for transmission and logic channel.

Above-mentioned transport format combination selection device, wherein, described bit rate metric is:

The bit number that transformat combination is transmitted in a radio frames, perhaps, the gain factor of transformat combination correspondence.

Above-mentioned transport format combination selection device, wherein, described minimax transformat combination determination module is further used for:

Maximum tfc is set to: the transformat combination of the bit rate metric maximum in the described transport format combination set;

The minimum transfer format combination is set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

Above-mentioned transport format combination selection device, wherein, described power computation module is further used for:

Calculate current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power;

Calculate current transformat combination each in the maximum transmission time interval and activate the transmitted power of other coded combination transmission channels of time slot, obtain minimum transmit power wherein, and calculate the poor of transmitting terminal time slot maximum transmit power and described minimum transmit power, obtain described available transmit power.

Above-mentioned transport format combination selection device, wherein, described judge module is further used for:

When described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination;

When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc.

Above-mentioned transport format combination selection device, wherein, described transmission format subset determination module is further used for:

When needs reduce transformat combination, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described first transformat combination, obtained described transport format combination subset;

When needs improve transformat combination, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described second transformat combination, obtained described transport format combination subset.

Compared with prior art, the invention has the beneficial effects as follows:

The present invention combines the power capability of transmitting terminal when carrying out transport format combination selection, like this, when the better closed loop power control system of link-quality was effective, transmitting terminal transmitted data with maximum data rate by eating dishes without rice or wine; When the bad closed loop power control system of link-quality lost efficacy, transmitting terminal reduced the actual bit rate of coded combination transmission channel, thereby has improved the link antijamming capability, particularly can improve the performance under system's edge region or the strong interference environment effectively.

Description of drawings

Fig. 1 is the flow chart of the transport format combination selecting method of the embodiment of the invention;

Fig. 2 is the structure chart of the transport format combination selection device of the embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.

With reference to Fig. 1, the transport format combination selecting method of the embodiment of the invention comprises the steps:

Step 101: the bit rate metric of every kind of transformat combination in the transport format combination set of calculating present encoding combination of transmitted channel correspondence;

The bit rate metric of transformat combination has multiple characteristic manner, and the embodiment of the invention provides following 2 kinds of characteristic manner:

(1) the bit rate metric is the bit number that transformat combination is transmitted in a radio frames (10ms), is specially:

${\mathrm{BitNumFrm}}_j=\mathrm{ceil}(\frac{1}{\mathrm{TTI}\_\mathrm{MAX}}{\mathrm{\Σ}}_i\mathrm{TrBk}\_{\mathrm{Num}}_{j,i}*\mathrm{TrBk}\_{\mathrm{Size}}_{j,i})$

Wherein, BitNumFrm _jThe bit number that j transformat combination of expression present encoding combination of transmitted channel transmitted in a radio frames, ceil (x) is the function that rounds up, expression is not less than the smallest positive integral of x, TTI_MAX represents the maximum transmission time interval (TTI) in the present encoding combination of transmitted channel, the 10ms of unit, TrBk_Num _{J, i}The transmission block number of i transmission channel in j the transformat combination of expression present encoding combination of transmitted channel, TrBk_Size _{J, i}The transmission block size of i transmission channel in j the transformat combination of expression present encoding combination of transmitted channel.

(2) the bit rate metric is the gain factor of transformat combination correspondence.

Have two kinds of approach to obtain the gain factor of the different transpost formats combination of coded combination transmission channel, a kind of is to obtain by high-level signaling, and another kind is to obtain by calculating.

According to the definition of 3GPP25.224, the formula of gain factor that calculates each transformat combination is as follows:

${\mathrm{\β}}_j={\mathrm{\β}}_{\mathrm{ref}}*\sqrt{\frac{L_{\mathrm{ref}}}{L_j}}\sqrt{\frac{K_j}{K_{\mathrm{ref}}}}$

Wherein, β _jBe the gain factor of transformat combination j, β _RefBe the gain factor of reference transmission format combination,

Be intermediate variable, SF _iBe i spreading factor that activates physical code channel,

Be the intermediate variable of reference transmission format combination correspondence, K _j=∑ _iRM _i* N _iBe intermediate variable, RM _iBe the rate-matched property parameters of transmission channel i, N _iBe the bit number of transmission channel i through exporting after the wireless frame segmentation, K _Ref=∑ _iRM _i* N _iIntermediate variable for reference transmission format combination correspondence.

Step 102: determine maximum, minimum transfer format combination in the described transport format combination set according to the priority of the data transmission state of wireless chain control layer and logic channel;

Wherein, can maximum tfc be set to: the transformat combination of the bit rate metric maximum in the described transport format combination set;

Can the minimum transfer format combination be set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

Step 103: the priority according to wireless chain control layer data volume size waiting for transmission and logic channel is selected current transformat combination from described transport format combination set;

This step is to carry out the selection of transformat combination according to the regulation of 3GPP25.321, and to realize that maximum data rate is transmitted as criterion, wherein, the selection of transformat combination should effectively carried out in the transport format combination set, and satisfies following condition successively:

There are not other transformat combination can send the data of higher priority of logical channels than selected transformat combination;

Do not have other transformat combination than sending more data on the inferior high priority logic channel, reuse this rule for other remaining priority;

There are not other transformat combination to have lower bit rate than this transformat combination.

Step 104: calculate average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval;

Particularly, by calculating current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power, as follows:

${\mathrm{TxPow}}_{\mathrm{Avg}}=\frac{1}{\mathrm{TS}\_\mathrm{Num}}{\mathrm{\Σ}}_{i,j}\mathrm{Tx}\_{\mathrm{Pow}}_{i,j}$

Here, maximum transmission time is spaced apart the maximum transmission time interval that has in all transmission channels in the coded combination transmission channel, TxPow _AvgBe the average transmitting power in the maximum transmission time interval, TS_Num represents the maximum transmission time interior number of time slot that activates at interval, Tx_Pow _{I, j}Be j transmitted power that activates time slot of i subframe.

Activate the transmitted power of other coded combination transmission channels of time slot by calculating current transformat combination each in the maximum transmission time interval, obtain minimum transmit power wherein, and calculating transmitting terminal time slot maximum transmit power and described minimum transmit power is poor, obtain described available transmit power, as follows:

TxPowCCTrCH _resv＝MAX_TX_POWER-min(TxPowCCTrCH _other，j)

Wherein, TxPowCCTrCH _ResvBe available transmit power, MAX_TX_POWER is transmitting terminal time slot maximum transmit power, TxPowCCTrCH _{Other, j}Be j transmitted power that activates other coded combination transmission channels that coexist with present encoding combination of transmitted channel in the time slot.

Step 105: judge whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination;

Particularly, when described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination;

When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc.

Step 106: when determining to need the gravity treatment transformat combination, determine transport format combination subset according to the bit rate metric of current transformat combination;

Need the gravity treatment transformat combination to be divided into two kinds of situations again: to reduce transformat combination and improve transformat combination.

When needs reduce transformat combination, determine transport format combination subset in the following manner:

At first, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit;

Metric_TFCI _{up_temp1}＝Metric_TFCI _used*TH_Dec

Wherein, Metric_TFCI _UsedIt is the bit rate metric of current transformat combination, TH_Dec is described first weights, 0＜TH_Dec≤1, if the bit number that the bit rate metric transmits in a radio frames based on transformat combination, then its representative value is 3/4, if the bit rate metric is based on the gain factor of transformat combination correspondence, then its representative value is 0.89, Metric_TFCI _{Up_temp1}It is the described first accurate higher limit.

Then, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum is with the bit rate metric of described first transformat combination upper limit Metric_TFCI as bit rate metric in the transport format combination subset _Up

At last, with bit rate metric in the described transport format combination set greater than Metric_TFCI _UpTransformat combination remove, obtain described transport format combination subset, that is to say, in the transport format combination subset S ' that creates, comprise all bit rate metrics and be not more than Metric_TFCI _UpTransformat combination.

When needs improve transformat combination, determine transport format combination subset in the following manner:

At first, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit;

Metric_TFCI _{up_temp2}＝Metric_TFCI _used*TH_Inc

Wherein, Metric_TFCI _UsedIt is the bit rate metric of current transformat combination, TH_Inc is described second weights, 1＜TH_Inc≤2, if the bit number that the bit rate metric transmits in a radio frames based on transformat combination, then its representative value is 4/3, if the bit rate metric is based on the gain factor of transformat combination correspondence, then its representative value is 1.1, Metric_TFCI _{Up_remp2}It is the described second accurate higher limit.

Then, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum is with the bit rate metric of described second transformat combination upper limit Metric_TFCI as bit rate metric in the transport format combination subset _Up

At last, with bit rate metric in the described transport format combination set greater than Metric_TFCI _UpTransformat combination remove, obtain described transport format combination subset, that is to say, in the transport format combination subset S ' that creates, comprise all bit rate metrics and be not more than Metric_TFCI _UpTransformat combination.

Step 107: according to priority current transformat combination of gravity treatment from described transport format combination subset of wireless chain control layer data volume size waiting for transmission and logic channel.

This step is to carry out the selection of transformat combination according to the regulation of 3GPP25.321, to realize that maximum data rate is transmitted as criterion, wherein, the selection of transformat combination should be (different with step 103 at effective transport format combination set, in this step for transport format combination subset S ') in carry out, and satisfy following condition successively:

There are not other transformat combination can send the data of higher priority of logical channels than selected transformat combination;

Do not have other transformat combination than sending more data on the inferior high priority logic channel, reuse this rule for other remaining priority;

There are not other transformat combination to have lower bit rate than this transformat combination.

Be that example describes said method with Packet Service 384K below, the parameter configuration of 384K is as shown in the table:

As above under the configuration shown in the table, its transport format combination set is: (TF0, TF0), (TF0, TF1), (TF1, TF0), (TF1, TF1), (TF2, TF0), (TF2, TF1), (TF3, TF0), (TF3, TF1), (TF4, TF0), TF4, TF1), (TF5, TF0), (TF5, TF1), (TF6, TF0), (TF6, TF1), (TF7, TF0), (TF7, TF1), (TF8, TF0), (TF8, TF1) }.

Calculate the bit rate metric of each transformat combination correspondence, the bit number that transmits in a radio frames with transformat combination is example here, and its corresponding bit rate metric is: { 0,37,168,205,336,373,672,709,1344,1381,2016,2053,2688,2725,3360,3397,4032,4069}.

The logic channel of supposing to be mapped among transmission channel TrCH1 and the TrCH2 has identical limit priority, then (TF1, TF1) Dui Ying transformat combination is set to minimum transformat combination, (TF8, TF1) Dui Ying transformat combination is set to maximum transformat combination.

Suppose that transmitting terminal has only a coded combination transmission channel, maximum transmission time is spaced apart 40ms, and the maximum time slot transmitted power of transmitting terminal is 24dBm, and the power of establishing transmitting terminal 24 time slots in 8 nearest subframes is 24dBm, then average transmitting power TxPow _Avg=24dBm, because have only single encoded combination of transmitted channel on each time slot, then available transmit power is the maximum transmit power 24dBm of transmitting terminal.

Suppose that the transformat combination that current transmission time interval is used is (TF8, TF0), corresponding bit rate metric is 4032, because the average transmitting power of transmitting terminal equates with available transmit power, and current transformat combination is not the minimum transfer format combination, then can determine needs to reduce transformat combination, and handles according to following steps:

Step 1 is determined the higher limit of object transmission format combination set bit rate metric

The accurate higher limit of object transmission format combination set bit rate value is 4032 * (3/4)=3024, and then described higher limit is { 0,37,168,205,336,373,672,709,1344,1381,2016,2053,2688,2725,3360, maximum 3024 the value 2725 that is not more than among 3397,4032, the 4069}.

Step 2 is created new transport format combination subset S '

In all transformat combination of present encoding combination of transmitted channel, this subclass S ' comprises all bit rate metrics and is not more than 2725 transformat combination, that is: (TF0, TF0), (TF0, TF1), (TF1, TF0), (TF1, TF1), (TF2, TF0), (TF2, TF1), (TF3, TF0), (TF3, TF1), (TF4, TF0), (TF4, TF1), (TF5, TF0), (TF5, TF1), (TF6, TF0), (TF6, TF1) }

Step 3, the selection of transformat combination

According to the priority of wireless chain control layer data volume size waiting for transmission and logic channel from transport format combination subset S ' the current transformat combination of gravity treatment (TF6, TF1), simultaneously Metric_TFCI _UsedBe updated to 2725.

Correspondingly, the embodiment of the invention also provides a kind of transport format combination selection device.With reference to Fig. 2, described transport format combination selection device comprises: bit rate metric computing module, minimax transformat combination determination module, transport format combination selection module, power computation module, judge module, transmission format subset determination module, wherein:

Bit rate metric computing module be used for to calculate the bit rate metric of every kind of transformat combination of the transport format combination set of present encoding combination of transmitted channel correspondence.Described bit rate metric is: the bit number that transformat combination is transmitted in a radio frames, perhaps, the gain factor of transformat combination correspondence.

Minimax transformat combination determination module is used for determining according to the priority of the data transmission state of wireless chain control layer and logic channel maximum, the minimum transfer format combination of described transport format combination set.Particularly, maximum tfc is set to: the transformat combination of the bit rate metric maximum in the described transport format combination set; The minimum transfer format combination is set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

The transport format combination selection module is used for selecting current transformat combination according to the priority of wireless chain control layer data volume size waiting for transmission and logic channel from described transport format combination set.Described biography.Transport format combination selects module to carry out the selection of transformat combination according to the regulation of 3GPP25.321.

Power computation module is used for calculating average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval.Particularly, calculate current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power; Calculate current transformat combination each in the maximum transmission time interval and activate the transmitted power of other coded combination transmission channels of time slot, obtain minimum transmit power wherein, and calculate the poor of transmitting terminal time slot maximum transmit power and described minimum transmit power, obtain described available transmit power.

Judge module is used for judging whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination.Particularly, when described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination; When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc.

The transmission format subset determination module is used for determining transport format combination subset according to the bit rate metric of current transformat combination when determining to need the gravity treatment transformat combination.Particularly, when needs reduce transformat combination, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described first transformat combination, obtained described transport format combination subset; When needs improve transformat combination, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described second transformat combination, obtained described transport format combination subset.

After having generated new transport format combination subset according to the transmission format subset determination module, described transport format combination selection module is further according to priority current transformat combination of gravity treatment from described transport format combination subset of wireless chain control layer data volume size waiting for transmission and logic channel.

In sum, the present invention combines the power capability of transmitting terminal when carrying out transport format combination selection, and like this, when the better closed loop power control system of link-quality was effective, transmitting terminal transmitted data with maximum data rate by eating dishes without rice or wine; When the bad closed loop power control system of link-quality lost efficacy, transmitting terminal reduced the actual bit rate of coded combination transmission channel, thereby has improved the link antijamming capability, particularly can improve the performance under system's edge region or the strong interference environment effectively.

Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (8)

1. a transport format combination selecting method is characterized in that, comprising:

The bit rate metric of every kind of transformat combination in the transport format combination set of calculating present encoding combination of transmitted channel correspondence;

Determine maximum, minimum transfer format combination in the described transport format combination set according to the priority of the data transmission state of wireless chain control layer and logic channel;

Priority according to wireless chain control layer data volume size waiting for transmission and logic channel is selected current transformat combination from described transport format combination set;

Calculate average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval;

Judge whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination;

When determining to need the gravity treatment transformat combination, determine transport format combination subset according to the bit rate metric of current transformat combination;

Priority current transformat combination of gravity treatment from described transport format combination subset according to wireless chain control layer data volume size waiting for transmission and logic channel;

Wherein, describedly judge whether that according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination needs gravity treatment transformat combination comprises:

When described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination;

When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc;

Wherein, described bit rate metric according to current transformat combination determines that transport format combination subset comprises:

When needs reduce transformat combination, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described first transformat combination, obtained described transport format combination subset;

When needs improve transformat combination, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described second transformat combination, obtained described transport format combination subset.

2. transport format combination selecting method as claimed in claim 1 is characterized in that, described bit rate metric is:

The bit number that transformat combination is transmitted in a radio frames, perhaps, the gain factor of transformat combination correspondence.

3. transport format combination selecting method as claimed in claim 1, it is characterized in that, describedly determine that according to the data transmission state of wireless chain control layer and the priority of logic channel maximum, minimum transfer format combination in the described transport format combination set comprise:

Maximum tfc is set to: the transformat combination of the bit rate metric maximum in the described transport format combination set;

The minimum transfer format combination is set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

4. transport format combination selecting method as claimed in claim 1 is characterized in that, average transmitting power and the available transmit power of the current transformat combination of described calculating in the maximum transmission time interval comprises:

Calculate current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power;

Calculate current transformat combination each in the maximum transmission time interval and activate the transmitted power of other coded combination transmission channels of time slot, obtain minimum transmit power wherein, and calculate the poor of transmitting terminal time slot maximum transmit power and described minimum transmit power, obtain described available transmit power.

5. a transport format combination selection device is characterized in that, comprising:

Bit rate metric computing module be used for to calculate the bit rate metric of every kind of transformat combination of the transport format combination set of present encoding combination of transmitted channel correspondence;

Minimax transformat combination determination module is used for determining according to the priority of the data transmission state of wireless chain control layer and logic channel maximum, the minimum transfer format combination of described transport format combination set;

The transport format combination selection module is used for selecting current transformat combination according to the priority of wireless chain control layer data volume size waiting for transmission and logic channel from described transport format combination set;

Power computation module is used for calculating average transmitting power and the available transmit power of current transformat combination in the maximum transmission time interval;

Judge module is used for judging whether needs gravity treatment transformat combination according to described average transmitting power, available transmit power and described maximum, minimum transfer format combination;

The transmission format subset determination module is used for determining transport format combination subset according to the bit rate metric of current transformat combination when determining to need the gravity treatment transformat combination;

Described transport format combination selection module also is used for, according to priority current transformat combination of gravity treatment from described transport format combination subset of wireless chain control layer data volume size waiting for transmission and logic channel;

Wherein, described judge module is further used for:

When described average transmitting power more than or equal to described available transmit power, and current transformat combination determines to need to reduce transformat combination when not being described minimum transfer format combination;

When described average transmitting power less than described available transmit power, and current transformat combination determines to need to improve transformat combination when not being described maximum tfc;

Wherein, described transmission format subset determination module is further used for:

When needs reduce transformat combination, bit rate metric and first weights of current transformat combination are multiplied each other, obtain the first accurate higher limit, from described transport format combination set, first transformat combination that is not more than the described first accurate higher limit of search bit rate value maximum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described first transformat combination, obtained described transport format combination subset;

When needs improve transformat combination, bit rate metric and second weights of current transformat combination are multiplied each other, obtain the second accurate higher limit, from described transport format combination set, second transformat combination that is not less than the described second accurate higher limit of search bit rate value minimum, bit rate metric in the described transport format combination set is removed greater than the transformat combination of the bit rate metric of described second transformat combination, obtained described transport format combination subset.

6. transport format combination selection device as claimed in claim 5 is characterized in that, described bit rate metric is:

The bit number that transformat combination is transmitted in a radio frames, perhaps, the gain factor of transformat combination correspondence.

7. transport format combination selection device as claimed in claim 5 is characterized in that, described minimax transformat combination determination module is further used for:

Maximum tfc is set to: the transformat combination of the bit rate metric maximum in the described transport format combination set;

The minimum transfer format combination is set to: in the described transport format combination set, the transmission block number that has on the transmission channel of the highest priority of logical channels is non-vanishing, and the transformat combination of bit rate metric minimum.

8. transport format combination selection device as claimed in claim 5 is characterized in that, described power computation module is further used for:

Calculate current transformat combination in the transmitted power of each the activation time slot of maximum transmission time at interval, and the transmitted power that calculates is averaged obtains described average transmitting power;

Calculate current transformat combination each in the maximum transmission time interval and activate the transmitted power of other coded combination transmission channels of time slot, obtain minimum transmit power wherein, and calculate the poor of transmitting terminal time slot maximum transmit power and described minimum transmit power, obtain described available transmit power.

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