CN102281617A - E-TFC (E-PUCH Transport Format Combination) selection method and device for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) multi-carrier HSUPA (High Speed Uplink Packet Access) system - Google Patents

E-TFC (E-PUCH Transport Format Combination) selection method and device for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) multi-carrier HSUPA (High Speed Uplink Packet Access) system Download PDF

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CN102281617A
CN102281617A CN2010102003186A CN201010200318A CN102281617A CN 102281617 A CN102281617 A CN 102281617A CN 2010102003186 A CN2010102003186 A CN 2010102003186A CN 201010200318 A CN201010200318 A CN 201010200318A CN 102281617 A CN102281617 A CN 102281617A
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carrier wave
carrier
power
transmitting power
current
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CN102281617B (en
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梅晓华
胡文成
胡晓敏
赵榕
张铭虎
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Leadcore Technology Co Ltd
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Leadcore Technology Co Ltd
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Abstract

The invention relates to an E-TFC (E-PUCH Transport Format Combination) selection method and an E-TFC selection device for a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) multi-carrier HSUPA (High Speed Uplink Packet Access) system so as to solve the problem of interference caused by large power difference between adjacent carriers. In the method, interference of each carrier of a network distribution carrier resource to an adjacent carrier is calculated; then a ratio of a signal on each carrier to the interference of the network distribution carrier resource is compared with a preset threshold; if the ratio of the signal on the current carrier to the interference is less than the preset threshold, a transmitting power of a carrier adjacent to the current carrier is regulated so as to ensure the ratio of the signal on the current carrier to the interference more than or equal to the preset threshold; according to the regulated transmitting power of each carrier, power authorization on each carrier of the network distribution carrier resource is calculated; and finally, according to the calculated power authorization, each carrier is subjected to E-TFC selection.

Description

The E-TFC system of selection and the device of TD-SCDMA multi-carrier HSUPA system
Technical field
The present invention relates to a kind of TD-SCDMA multi-carrier HSUPA (High Speed Uplink PacketAccess, high speed uplink packet insert) system, especially relate to the E-TFC system of selection of a kind of TD-SCDMA multi-carrier HSUPA system.
Background technology
It is a kind of 3G transmission technology of enhancement mode that high speed uplink packet inserts (HSUPA), its objective is in order to improve the system uplink ability, and improves user experience.The TD-SCDMA system has introduced the multi-carrier HSUPA technology in 3GPP Release10.In the multi-carrier HSUPA technology, terminal can send the HSUPA data simultaneously on a plurality of carrier waves, make the up peak rate of terminal to be multiplied.
There are two kinds of implementations multi-carrier HSUPA terminal radio frequency aspect: a kind of is the radio-frequency structure of independent arrowband, promptly have and overlap independently sender more, the bandwidth of each sender is identical with the bandwidth of original single carrier, each sender is operated on the independent carrier wave, overlaps the multicarrier data transmission that sender is worked simultaneously and realized terminal more; Another kind is the wide band radio-frequency structure, and promptly terminal has only a cover sender, and the bandwidth of this sender is the multiple of original single carrier bandwidth, and terminal realizes the transmission of multicarrier data by base band.Because in first kind of implementation, the volume of terminal, power consumption, cost are all very big, generally all adopt second kind of implementation to realize the transmission of multi-carrier HSUPA, it must be continuous that second kind of implementation requires a plurality of carrier waves.
E-TFC (the E-PUCH Transport Format Combination of existing single carrier HSUPA, the E-DCH transformat combination) selecting is to select suitable E-TFC according to the power mandate (PRRI) and the code channel resource of network, the selected E-TFC of terminal must satisfy following formula 1, and the transmitting power of the E-PUCH of terminal can not surpass the maximum transmission power of terminal.
β 0, e+ Δ harq≤PRRI formula 1
Each meaning of parameters is as follows in the formula 1:
PRRI:UE allows the E-PUCH through-put power of the maximum used and the ratio of reference power on each Resource Unit, a Resource Unit is defined as the code word of the SF16 of a time slot;
β 0, e: for selected E-TFC and the resource collection of E-PUCH, the beta value of normalization (each Resource Unit); And
Δ Harq: the power bias of HARQ process.
The transmitting power of terminal E-PUCH is:
P E-PUCH=P E-base+ L+ β eFormula 2
Each parameter-definition is as follows in the formula 2:
P E-PUCH: the transmitted power of E-PUCH;
P E-base: the closed loop amount that UE and Node B safeguard, receive after TPC orders all can increase or reduce certain numerical value at every turn;
L: transmission path loss; And
β e: the gain factor of the E-PUCH physical resource of the corresponding E-TFC transmission block size of selecting, distribution, modulation system and HARQ biasing.
In the multi-carrier HSUPA system, if continue to use single carrier E-TFC system of selection, network can carry out power mandate and code channel resource respectively and distribute on each carrier wave, terminal can be carried out E-TFC to each carrier wave respectively and be selected, calculate the transmitting power of the E-PUCH on each carrier wave according to the E-TFC selection result, send with this power then.The phenomenon that this method causes probably is that the power of some carrier wave is too high, and the power of some carrier wave is low excessively.And in the multi-carrier HSUPA system of broadband sender, the signal power of certain carrier wave can be to disturb concerning other carrier waves to leaking on other carrier waves.If the power difference between the carrier wave is too big, will influence the performance that some carrier wave sends, then the whole system performance is influenced to some extent.
Summary of the invention
Technical problem to be solved by this invention provides the E-TFC system of selection of a kind of improved multi-carrier HSUPA system, and it considers influencing each other of signal between each carrier wave.
The present invention solves the problems of the technologies described above the E-TFC system of selection that the technical scheme that adopts is a kind of TD-SCDMA multi-carrier HSUPA of proposition system, may further comprise the steps: calculate the maximum transmission power of the E-PUCH channel that allows on each carrier wave, and each carrier wave of computing network distributing carrier wave resource interference that adjacent carrier is caused.The ratio of signal and interference and a default thresholding on each carrier wave of comparing cell distributing carrier wave resource, if the ratio of signal and interferences is less than a default thresholding on the current carrier wave, then adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference more than or equal to this default thresholding.Afterwards, according to the transmitting power of each carrier wave of adjusting, the power mandate on each carrier wave of computing network distributing carrier wave resource at last according to the power mandate of calculating, is carried out E-TFC respectively to each carrier wave and is selected.
In an embodiment of the present invention, each carrier wave of computing network distributing carrier wave resource also comprises the interference that adjacent carrier causes before: determine whether the summation of the maximum transmission power that each carrier wave allows surpasses the maximum transmission power of terminal, if, then be adjusted to the maximum transmission power of small part carrier wave, make the summation of the maximum transmission power that each carrier wave allows be no more than the maximum transmission power of terminal.
In an embodiment of the present invention, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference comprise more than or equal to the step of this default thresholding: if the transmitting power of two adjacent carriers of this current carrier wave is then reduced the transmitting power of these two adjacent carriers all greater than the transmitting power of this current carrier wave; If the transmitting power of an adjacent carrier of this current carrier wave greater than the transmitting power of this current carrier wave, is then reduced the transmitting power of this adjacent carrier.
In an embodiment of the present invention, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interferences comprise more than or equal to the step of this default thresholding: will have step-length of carrier wave downward modulation of maximum transmission power in the carrier wave, this step-length is the setting recently according to peak signal and interference.
The present invention proposes a kind of E-TFC choice device that is used to carry out the TD-SCDMA multi-carrier HSUPA system of said method in addition, comprising:
Be used to calculate the device of the maximum transmission power of the E-PUCH channel that allows on each carrier wave;
The device of the interference that each carrier wave that is used for computing network distributing carrier wave resource causes adjacent carrier;
Be used for the ratio and of signal and interferences on each carrier wave of comparing cell distributing carrier wave resource and preset the device of thresholding;
If the ratio that is used for signal and interferences on the current carrier wave less than a default thresholding, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference more than or equal to the device of this default thresholding;
The device that is used for the power mandate on each carrier wave of computing network distributing carrier wave resource; And
Be used for each carrier wave being carried out the device that E-TFC selects respectively according to the power mandate after calculating.
The present invention is owing to adopt above technical scheme, make it compared with prior art, controlled the transmitting power of some carrier wave, make the transmitting power of adjacent carrier can not differ too big, this makes the Error Vector Magnitude of all carrier waves all be controlled at reasonable range at last, thereby has promoted the performance of system.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates E-TFC system of selection in the multi-carrier HSUPA system of one embodiment of the invention.
Embodiment
Summarily say, following embodiment of the present invention carries out having considered when E-TFC selects influencing each other of signal between each carrier wave in the multi-carrier HSUPA system, the carrier wave excessive to some power carries out the adjustment of power, make the EVM (Error Vector Magnitude) of all carrier waves all be controlled at reasonable range at last, calculate corresponding power mandate (PRRI) according to the carrier power after adjusting then, carry out the selection of E-TFC according to adjusted PRRI at last.
Fig. 1 illustrates E-TFC system of selection in the multi-carrier HSUPA system of one embodiment of the invention.With reference to shown in Figure 1, at step S10, terminal according to the carrier resource of network allocation and the power mandate (PRRI) on each carrier wave according to below formula 3 calculate the maximum transmission power P of the E-PUCH that allows on each carrier wave i, i=1 wherein, 2,3 ..., n, wherein i=1 represents the minimum carrier wave of carrier wave medium frequency that distributes, i=2 represents the carrier wave with the high bandwidth of minimum frequency (for example 1.6MHZ), by that analogy.
P i=Pe-base i+ L i+ PRRI iFormula 3
In formula 3, Pe-base iBe the closed loop amount that UE and Node B safeguard, receive after TPC orders all can increase or reduce certain numerical value, L at every turn iIt is the transmission path loss of carrier wave i.If going up network, certain carrier wave i do not have Resources allocation, then P iBe 0.
After step S10, flow performing step S12 and S14 are to guarantee the summation ∑ P of all carrier powers iSum can not surpass the maximum transmission power Pmax of terminal.In one embodiment, if certain time slot except the E-PUCH channel, also has other up channels to need to send, then the Pmax here need deduct the transmitted power of other up channels.
At step S12, terminal is determined the summation ∑ P of all carrier powers iThe maximum transmission power Pmax that whether surpasses terminal, if do not surpass the terminal maximum transmission power, flow process jumps to step S16; If surpass, then flow process enters step S14, the transmitting power on the downward modulation carrier wave.
The mode of the transmitting power in step S14 on the downward modulation carrier wave can be: if the transmitting power P of the carrier wave of all Resources allocation iIdentical, then the transmitting power equal proportion on each carrier wave descends, and makes it to satisfy ∑ P i=Pmax.If the transmitting power P of the carrier wave of all Resources allocation iInequality, it is identical with inferior high carrier power that the power of then that power is the highest carrier wave drops to, and determines then whether adjusted each carrier wave gross power surpasses the maximum transmission power of terminal; If surpass, repeating step S14, otherwise flow process enters step S16.
In step S16, the interference I that each carrier wave of computing network distributing carrier wave resource causes adjacent carrier i=P i+ A.If the unallocated resource of certain carrier wave i network, then I iEqual 0; A is that the side channel of adjacent channel leaks ratio.In this and following calculating, be that unit calculates with dB, so that multiplication and division arithmetic are converted to addition and subtraction.
In step S18, determine signal and interference ratio E on each carrier wave of network allocation carrier resource i=P i-(I I-1+ I I+1) whether more than or equal to thresholding T.If certain carrier signal and interference ratio less than thresholding T, then need be reduced the transmitting power of its adjacent carrier in step S20.In one embodiment, thresholding T can determine according to transmitter EVM index.
In one embodiment of this invention, the carrier power downward modulation can be adopted such method: if the power P of two adjacent carriers I-1, P I+1All greater than current carrier power P i, P then I-1, P I+1All descend adjusting power, the amplitude of descending adjusting power altogether is (T-E i) dB.If P I-1, P I+1In have only a carrier power greater than P iThen that power is high carrier power downward modulation (T-E i) dB; If perhaps current carrier wave has only an adjacent carrier and this adjacent carrier power P I-1(or P I+1) greater than P i, then with this adjacent carrier power decreasing (T-E i) dB.
In another embodiment of the present invention, the carrier power downward modulation can be adopted such method: will have step-length of carrier wave downward modulation of maximum transmission power in the carrier wave, this step-length can be provided with according to the ratio Ei of peak signal and interference.
Determine E on the carrier wave of all-network Resources allocation at step S22 iAll more than or equal to after the thresholding T, enter step S24, at this, according to formula 3 and adjusted P i, recomputate the PRRI on the all-network Resources allocation carrier wave i
At last at step S26, according to adjusted PRRI i, each carrier wave is carried out E-TFC respectively selects.
The E-TFC system of selection of the embodiment of the invention is carrying out considering that power can not differ too big between each carrier wave when E-TFC selects at the characteristic of broadband sender, the carrier power that may influence EVM is adjusted, the excessive problem of EVM when avoiding occurring actual transmission, thus the performance of system promoted.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.

Claims (8)

1. the E-TFC system of selection of a TD-SCDMA multi-carrier HSUPA system comprises:
Calculate the maximum transmission power of the E-PUCH channel that allows on each carrier wave;
The interference that each carrier wave of computing network distributing carrier wave resource causes adjacent carrier;
The ratio of signal and interference and a default thresholding on each carrier wave of comparing cell distributing carrier wave resource, if the ratio of signal and interferences is less than a default thresholding on the current carrier wave, then adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference more than or equal to this default thresholding;
According to the transmitting power of each carrier wave of adjusting, the power mandate on each carrier wave of computing network distributing carrier wave resource; And
According to the power mandate of calculating, each carrier wave is carried out E-TFC respectively select.
2. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA as claimed in claim 1 system is characterized in that, also comprises before the interference that each carrier wave of computing network distributing carrier wave resource causes adjacent carrier:
Determine whether the summation of the maximum transmission power that each carrier wave allows surpasses the maximum transmission power of terminal, if, then be adjusted to the maximum transmission power of small part carrier wave, make the summation of the maximum transmission power that each carrier wave allows be no more than the maximum transmission power of terminal.
3. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA as claimed in claim 1 system, it is characterized in that, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference comprise more than or equal to the step of this default thresholding:
If the transmitting power of two adjacent carriers of this current carrier wave is then reduced the transmitting power of these two adjacent carriers all greater than the transmitting power of this current carrier wave;
If the transmitting power of an adjacent carrier of this current carrier wave greater than the transmitting power of this current carrier wave, is then reduced the transmitting power of this adjacent carrier.
4. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA as claimed in claim 1 system, it is characterized in that, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference comprise more than or equal to the step of this default thresholding:
To have step-length of carrier wave downward modulation of maximum transmission power in the carrier wave, this step-length is recently being provided with according to peak signal and interference.
5. the E-TFC choice device of a TD-SCDMA multi-carrier HSUPA system comprises:
Be used to calculate the device of the maximum transmission power of the E-PUCH channel that allows on each carrier wave;
The device of the interference that each carrier wave that is used for computing network distributing carrier wave resource causes adjacent carrier;
Be used for the ratio and of signal and interferences on each carrier wave of comparing cell distributing carrier wave resource and preset the device of thresholding;
If the ratio that is used for signal and interferences on the current carrier wave less than a default thresholding, adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference more than or equal to the device of this default thresholding;
The device that is used for the power mandate on each carrier wave of computing network distributing carrier wave resource; And
Be used for each carrier wave being carried out the device that E-TFC selects respectively according to the power mandate after calculating.
6. the E-TFC choice device of TD-SCDMA multi-carrier HSUPA as claimed in claim 5 system is characterized in that also comprising:
Whether the summation of the maximum transmission power that is used for determining that each carrier wave is allowed surpasses the device of the maximum transmission power of terminal;
Be used to be adjusted to the maximum transmission power of small part carrier wave, make the summation of the maximum transmission power that each carrier wave allows be no more than the device of the maximum transmission power of terminal.
7. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA as claimed in claim 5 system, it is characterized in that, be used to adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference comprise more than or equal to the device of this default thresholding:
Be used for determining whether this current carrier wave has the device of the transmitting power of two adjacent carriers greater than the transmitting power of this current carrier wave;
If be used for transmitting power that this current carrier wave has two adjacent carriers all greater than the transmitting power of this current carrier wave, reduce the device of the transmitting power of these two adjacent carriers;
If be used for this current carrier wave the transmitting power of the transmitting power of an adjacent carrier greater than this current carrier wave arranged, reduce the device of the transmitting power of this adjacent carrier.
8. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA as claimed in claim 5 system, it is characterized in that, be used to adjust this current carrier wave adjacent carrier transmitting power so that on this current carrier wave the ratio of signal and interference comprise more than or equal to the device of this default thresholding:
Be used for carrier wave is had the device of a step-length of carrier wave downward modulation of maximum transmission power, wherein this step-length is recently being provided with according to peak signal and interference.
CN201010200318.6A 2010-06-11 2010-06-11 E-TFC (E-PUCH Transport Format Combination) selection method and device for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) multi-carrier HSUPA (High Speed Uplink Packet Access) system Active CN102281617B (en)

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US9113467B2 (en) 2013-02-28 2015-08-18 Qualcomm Incorporated Adjusting initial transmit power for high speed data transmission
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