CN102281617B - 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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CN102281617B
CN102281617B CN201010200318.6A CN201010200318A CN102281617B CN 102281617 B CN102281617 B CN 102281617B CN 201010200318 A CN201010200318 A CN 201010200318A CN 102281617 B CN102281617 B CN 102281617B
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carrier
carrier wave
interference
power
transmitting power
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CN102281617A (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 of TD-SCDMA multi-carrier HSUPA system and device
Technical field
The present invention relates to a kind of TD-SCDMA multi-carrier HSUPA (High Speed Uplink PacketAccess, high speed uplink packet accesses) system, especially relate to a kind of E-TFC system of selection of TD-SCDMA multi-carrier HSUPA system.
Background technology
High speed uplink packet access (HSUPA) is a kind of 3G transmission technology of enhancement mode, its objective is to improve system uplink ability, and improves Consumer's Experience.TD-SCDMA system introduces multi-carrier HSUPA technology in 3GPP Release10.In multi-carrier HSUPA technology, terminal can send HSUPA data simultaneously over a number of carriers, and the upstream peak speed of terminal can be multiplied.
There are two kinds of implementations multi-carrier HSUPA terminal radio frequency aspect: a kind of is the radio-frequency structure of separate narrowband, namely have and overlap independently sender more, the bandwidth of the original single carrier of bandwidth sum of each sender is identical, each sender is operated on an independent carrier wave, and the multi-carrier data that many cover senders work to realize terminal simultaneously sends; Another kind is wide band radio-frequency structure, and namely terminal only has a set of sender, and the bandwidth of this sender is the multiple of original single carrier bandwidth, and terminal realizes the transmission of multi-carrier data by base band.Due in the first implementation, the volume of terminal, power consumption, cost are all very large, and generally all adopt the second implementation to realize the transmission of multi-carrier HSUPA, the second implementation requires that multiple carrier wave must be continuous print.
E-TFC (the E-PUCH Transport Format Combination of existing single carrier HSUPA, E-DCH transformat combination) select to be that power grants (PRRI) according to network and code channel resource select suitable E-TFC, E-TFC selected by terminal must meet formula 1 below, and the transmitting power of the E-PUCH of terminal can not exceed the maximum transmission power of terminal.
β 0, e+ Δ harq≤PRRI formula 1
In formula 1, each meaning of parameters is as follows:
PRRI:UE allows the ratio of maximum E-PUCH through-put power and the reference power used on each Resource Unit, and a Resource Unit is defined as the code word of the SF16 of a time slot;
β 0, e: for the resource collection of selected E-TFC and 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
In formula 2, each parameter is defined as follows:
P e-PUCH: the transmitted power of E-PUCH;
P e-base: the closed loop amount that UE and Node B safeguards, all can increase after receiving TPC command at every turn or reduce certain numerical value;
L: transmission path loss; And
β e: the gain factor that the E-TFC transmission block size that correspondence is selected, the E-PUCH physical resource of distribution, modulation system and HARQ are biased.
In multi-carrier HSUPA system, if continue to use single carrier E-TFC system of selection, network on each carrier wave, can carry out power grants respectively and code channel resource distributes, terminal can carry out E-TFC selection to each carrier wave respectively, calculate the transmitting power of the E-PUCH on each carrier wave according to E-TFC selection result, then send with this power.The phenomenon that this method probably causes is that the power of some carrier wave is too high, and the power of some carrier wave is too low.And in the multi-carrier HSUPA system of broadband sender, the signal power of certain carrier wave, to leaking on other carrier waves, can be interference concerning other carrier waves.If the power difference between carrier wave is too large, the performance that some carrier wave sends will be affected, then whole system performance is affected to some extent.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of E-TFC system of selection of multi-carrier HSUPA system of improvement, and it considers influencing each other of signal between each carrier wave.
The present invention is that to solve the problems of the technologies described above the technical scheme adopted be the E-TFC system of selection proposing a kind of TD-SCDMA multi-carrier HSUPA system, comprise the following steps: the maximum transmission power calculating the E-PUCH channel that each carrier wave allows, and the interference that each carrier wave of computing network distributing carrier wave resource causes adjacent carrier.The ratio of signal and interference on each carrier wave of comparing cell distributing carrier wave resource and a pre-determined threshold, if the ratio of signal and interference is less than a pre-determined threshold on a current carrier, then the transmitting power adjusting the adjacent carrier of this current carrier is more than or equal to this pre-determined threshold to make the ratio of signal and interference on this current carrier.Afterwards, according to the transmitting power of each carrier wave of adjustment, the power grants on each carrier wave of computing network distributing carrier wave resource, finally according to the power grants calculated, carries out E-TFC selection respectively to each carrier wave.
In an embodiment of the present invention, also comprise 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 exceedes the maximum transmission power of terminal, if, then be adjusted to the maximum transmission power of small part carrier wave, the summation of the maximum transmission power that each carrier wave is allowed is no more than the maximum transmission power of terminal.
In an embodiment of the present invention, the transmitting power adjusting the adjacent carrier of this current carrier comprises to make the step that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold: if the transmitting power of two of this current carrier adjacent carriers is all greater than the transmitting power of this current carrier, then lower the transmitting power of these two adjacent carriers; If the transmitting power of this current carrier adjacent carrier is greater than the transmitting power of this current carrier, then lower the transmitting power of this adjacent carrier.
In an embodiment of the present invention, the transmitting power adjusting the adjacent carrier of this current carrier comprises to make the step that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold: the carrier wave in carrier wave with maximum transmission power is lowered a step-length, this step-length arranges according to the ratio of peak signal and interference.
The present invention separately proposes a kind of E-TFC choice device of the TD-SCDMA multi-carrier HSUPA system for performing said method, comprising:
For calculating the device of the maximum transmission power of the E-PUCH channel that each carrier wave allows;
For each carrier wave of computing network distributing carrier wave resource to the device of the interference that adjacent carrier causes;
Signal and the ratio of interference and the device of a pre-determined threshold on each carrier wave of comparing cell distributing carrier wave resource;
If the ratio of signal and interference is less than a pre-determined threshold on a current carrier, adjust the transmitting power of the adjacent carrier of this current carrier with the device making the ratio of signal and interference on this current carrier be more than or equal to this pre-determined threshold;
The device of the power grants on each carrier wave of computing network distributing carrier wave resource; And
For according to the power grants after calculating, each carrier wave is carried out respectively to the device of E-TFC selection.
The present invention is owing to adopting above technical scheme, make it compared with prior art, control the transmitting power of some carrier wave, make the transmitting power of adjacent carrier can not differ too large, this makes the Error Vector Magnitude of all carrier waves finally all control in rational scope, thus improves the performance of system.
Accompanying drawing explanation
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 considering influencing each other of signal between each carrier wave when E-TFC selects in multi-carrier HSUPA system, the carrier wave excessive to some power carries out the adjustment of power, the EVM of all carrier waves (Error Vector Magnitude) is made finally all to control in rational scope, then calculate corresponding power grants (PRRI) according to the carrier power after adjustment, finally carry out the selection of E-TFC according to the PRRI after adjustment.
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 Fig. 1, in step S10, calculate the maximum transmission power P of the E-PUCH that each carrier wave allows in terminal according to formula 3 below power grants (PRRI) foundation on the carrier resource of network allocation and each carrier wave i, wherein i=1,2,3 ..., n, wherein i=1 represents that the carrier wave that the carrier wave medium frequency of distribution is minimum, i=2 represent the carrier wave of a high bandwidth (such as 1.6MHZ) with minimum frequency, by that analogy.
P i=Pe-base i+ L i+ PRRI iformula 3
In equation 3, Pe-base ibe the closed loop amount that UE and Node B safeguards, all can increase after receiving TPC command at every turn or reduce certain numerical value, L iit is the transmission path loss of carrier wave i.If on certain carrier wave i, network does not have Resources allocation, then P ibe 0.
After step slo, flow performing step S12 and S14, to guarantee the summation ∑ P of all carrier powers isum can not exceed the maximum transmission power Pmax of terminal.In one embodiment, if certain time slot is except E-PUCH channel, also have other up channels to need to send, then Pmax here needs the transmitted power deducting other up channels.
In step S12, terminal determines the summation ∑ P of all carrier powers iwhether exceed the maximum transmission power Pmax of terminal, if do not exceed terminal maximum transmission power, flow process jumps to step S16; If exceeded, then flow process enters step S14, lowers the transmitting power on carrier wave.
The mode lowering the transmitting power on carrier wave in step S14 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 declines, and makes it to meet ∑ P i=Pmax.If the transmitting power P of the carrier wave of all Resources allocation inot identical, then the power of carrier wave the highest for power is dropped to identical with secondary high carrier power, then determine whether each carrier wave gross power after adjusting exceedes the maximum transmission power of terminal; If exceeded, repeat step S14, otherwise flow process enters step S16.
In step s 16, each carrier wave of computing network distributing carrier wave resource interference I that adjacent carrier is caused i=P i+ A.If the unallocated resource of certain carrier wave i network, then I iequal 0; A is the adjacent channel leakage ratio of adjacent channel.In this and following calculating, calculate in units of dB, so that multiplication and division arithmetic are converted to addition and subtraction.
In step S18, signal and interference ratio E on each carrier wave determining network allocation carrier resource i=P i-(I i-1+ I i+1) whether be more than or equal to thresholding T.If certain carrier signal and interference ratio are less than thresholding T, then need in step S20 the transmitting power lowering its adjacent carrier.In one embodiment, thresholding T can determine according to transmitter EVM index.
In one embodiment of this invention, carrier power is lowered and can be adopted such method: if the power P of two adjacent carriers i-1, P i+1all be greater than current carrier power P i, then P i-1, P i+1all descend adjusting power, altogether descend the amplitude of adjusting power to be (T-E i) dB.If P i-1, P i+1in only have a carrier power to be greater than P ithen carrier power high for power is lowered (T-E i) dB; If or current carrier only has an adjacent carrier and this adjacent carrier power P i-1(or P i+1) be greater than P i, then by this adjacent carrier power decreasing (T-E i) dB.
In another embodiment of the invention, carrier power is lowered can adopt such method: the carrier wave in carrier wave with maximum transmission power is lowered a step-length, and this step-length can be arranged according to the ratio Ei of peak signal and interference.
E on the carrier wave determining all-network Resources allocation in step S22 ibe all more than or equal to thresholding T after, enter step S24, at this, according to the P after formula 3 and adjustment i, recalculate the PRRI on all-network Resources allocation carrier wave i.
Last in step S26, according to the PRRI after adjustment i, respectively E-TFC selection is carried out to each carrier wave.
The E-TFC system of selection of the embodiment of the present invention considers that when the characteristic for broadband sender carries out E-TFC selection between each carrier wave, power can not differ too large, the carrier power that may affect EVM is adjusted, the problem that when avoiding occurring actual transmission, EVM is excessive, thus the performance improving system.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.

Claims (8)

1. an E-TFC system of selection for TD-SCDMA multi-carrier HSUPA system, comprising:
Calculate the maximum transmission power of the E-PUCH channel that each carrier wave allows;
The interference that each carrier wave of computing network distributing carrier wave resource causes adjacent carrier;
The ratio of signal and interference on each carrier wave of comparing cell distributing carrier wave resource and a pre-determined threshold, if the ratio of signal and interference is less than a pre-determined threshold on a current carrier, then the transmitting power adjusting the adjacent carrier of this current carrier is more than or equal to this pre-determined threshold to make the ratio of signal and interference on this current carrier;
According to the transmitting power of each carrier wave of adjustment, the power grants on each carrier wave of computing network distributing carrier wave resource; And
According to the power grants calculated, respectively E-TFC selection is carried out to each carrier wave.
2. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA system as claimed in claim 1, 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 exceedes the maximum transmission power of terminal, if, then be adjusted to the maximum transmission power of small part carrier wave, the summation of the maximum transmission power that each carrier wave is allowed is no more than the maximum transmission power of terminal.
3. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA system as claimed in claim 1, it is characterized in that, the transmitting power adjusting the adjacent carrier of this current carrier comprises to make the step that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold:
If the transmitting power of two of this current carrier adjacent carriers is all greater than the transmitting power of this current carrier, then lower the transmitting power of these two adjacent carriers;
If the transmitting power of this current carrier adjacent carrier is greater than the transmitting power of this current carrier, then lower the transmitting power of this adjacent carrier.
4. the E-TFC system of selection of TD-SCDMA multi-carrier HSUPA system as claimed in claim 1, it is characterized in that, the transmitting power adjusting the adjacent carrier of this current carrier comprises to make the step that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold:
The carrier wave in carrier wave with maximum transmission power is lowered a step-length, this step-length arranges according to the ratio of peak signal and interference.
5. an E-TFC choice device for TD-SCDMA multi-carrier HSUPA system, comprising:
For calculating the device of the maximum transmission power of the E-PUCH channel that each carrier wave allows;
For each carrier wave of computing network distributing carrier wave resource to the device of the interference that adjacent carrier causes;
Signal and the ratio of interference and the device of a pre-determined threshold on each carrier wave of comparing cell distributing carrier wave resource;
If the ratio of signal and interference is less than a pre-determined threshold on a current carrier, adjust the transmitting power of the adjacent carrier of this current carrier with the device making the ratio of signal and interference on this current carrier be more than or equal to this pre-determined threshold;
The device of the power grants on each carrier wave of computing network distributing carrier wave resource; And
For according to the power grants after calculating, each carrier wave is carried out respectively to the device of E-TFC selection.
6. the E-TFC choice device of TD-SCDMA multi-carrier HSUPA system as claimed in claim 5, characterized by further comprising:
For determining whether the summation of the maximum transmission power that each carrier wave allows exceedes the device of the maximum transmission power of terminal;
For being adjusted to the maximum transmission power of small part carrier wave, the summation of the maximum transmission power that each carrier wave is allowed is no more than the device of the maximum transmission power of terminal.
7. the E-TFC choice device of TD-SCDMA multi-carrier HSUPA system as claimed in claim 5, it is characterized in that, comprise to make the device that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold for the transmitting power adjusting the adjacent carrier of this current carrier:
For determining whether this current carrier has the transmitting power of two adjacent carriers to be greater than the device of the transmitting power of this current carrier;
If have the transmitting power of two adjacent carriers to be all greater than the transmitting power of this current carrier for this current carrier, lower the device of the transmitting power of these two adjacent carriers;
If have the transmitting power of an adjacent carrier to be greater than the transmitting power of this current carrier for this current carrier, lower the device of the transmitting power of this adjacent carrier.
8. the E-TFC choice device of TD-SCDMA multi-carrier HSUPA system as claimed in claim 5, it is characterized in that, comprise to make the device that on this current carrier, signal and the ratio of interference are more than or equal to this pre-determined threshold for the transmitting power adjusting the adjacent carrier of this current carrier:
For the carrier wave in carrier wave with maximum transmission power being lowered the device of a step-length, wherein this step-length arranges according to the ratio of 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
CN110875749A (en) * 2018-09-03 2020-03-10 中兴通讯股份有限公司 Power determination method, device, terminal and computer readable storage medium
WO2023000232A1 (en) * 2021-07-21 2023-01-26 Oppo广东移动通信有限公司 Wireless communication methods, terminal device and network device

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CN101730214A (en) * 2009-12-07 2010-06-09 浙江大学 Power spectrum profile generation and step-type power control method in multiple carrier wireless cognitive link

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CN101730214A (en) * 2009-12-07 2010-06-09 浙江大学 Power spectrum profile generation and step-type power control method in multiple carrier wireless cognitive link

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