CN101754267A - Link self-adaption transmission method and equipment - Google Patents

Abstract

The invention discloses a link self-adaption transmission method and equipment, and the method comprises the following steps: measuring and calculating high-speed downlink shared channel data provided by a network side in a current transmission time interval to obtain a demodulated bit signal-to-noise ratio; querying a channel quality indication mapping table corresponding to the capability levels of user equipment to obtain a data transmission parameter corresponding to the bit signal-to-noise ratio, wherein the channel quality indication mapping table is constructed by the modulated bit signal-to-noise ratio of the high-speed downlink shared channel data in multiple transmission time intervals in advance; and reporting the data transmission parameter for the network side to provide high-speed downlink shared channel data in the next transmission time interval. By using the invention, code rate and modulation mode can be adjusted in a self-adaption manner by the user equipment in the process of executing link self-adaption, thus ensuring higher system throughout.

Description

A kind of link self-adaption transmission method and equipment

Technical field

The present invention relates to mobile communication technology, be particularly related to a kind of at TD-SCDMA (Time DivisionSynchronous Code Division Multiple Access, link self-adaption transmission method and equipment when TD SDMA) mobile communication system provides HSDPA (High Speed Downlink Packet Access, high speed downlink packet inserts) professional.

Background technology

Along with social development and technological progress, international exchanges and cooperation are frequent day by day, and people wish that mobile communication system can equally with fixed network provide the interactive multimedia business that speech, image and data etc. are combined.WCDMA (Wideband CodeDivision Multiple Access as 3G (Third Generation) Moblie three big mainstream standard, Wideband Code Division Multiple Access (WCDMA)), cdma2000 and TD-SCDMA are carrying out the technology enhancing, to adapt to mobile multi-media service in the requirements at the higher level aspect data rate and the class of business.

In order to improve the transmission rate of downlink business, the TD-SCDMA system has introduced the HSDPA technology.HSDPA is the set of some wireless enhanced technology, on its purpose is to satisfy/the asymmetric demand of downstream data traffic, can under the situation that does not change existing TD-SCDMA network configuration, promote the user's peak rate and the cell data throughput of down link, thereby improve systematic function greatly and improve network capacity.Its basic physical layer key technology mainly comprises: AMC (Automatic Modulation and Coding, adaptive modulation and coding) technology, HARQ (English: Hybrid Automatic Repeat Request, mix automatic repeat requests) technology and high order modulation technology etc.

When utilizing AMC technical transmission HSDPA professional, the data-modulated mode that network side can adopt has two kinds: QPSK (Quaternary Phase Shift Keying, Quadrature Phase Shift Keying) and 16QAM (16Quadrature Amplitude Modulation, 16 quadrature amplitude modulation).In the link circuit self-adapting process of HSDPA, portable terminal is by measuring the channel quality of current environment of living in real time, select data transmission parameters such as transmission block size, modulation system and equivalent code rate to report network side adaptively, network side is determined the parameter that transfer of data adopted next time according to the recommendation of portable terminal.

Portable terminal uses HS-SICH, and (Shared Information Channel for HS-DSCH shares information channel; HS-DSCH:High Speed Downlink Shared Channel, high speed descending sharing channel) reports three kinds of information: RMF (Recommended Modulation Format to network side, the modulation system of recommending), RTBS (Recommended Transport Block Size, the transmission block size of recommending) and HARQ information (ACK/NACK), wherein RMF and RTBS are called CQI (Channel QualityIndication, channel quality indication) information.

Portable terminal provides the estimated information of equivalent code rate to network side by CQI, adopt this equivalence code rate, can be so that when decoding separately, last time the single transmission throughput of HS-DSCH transmission course reached maximum, BLER (Block Error Ratio, transmission block error probability) is no more than 10% simultaneously.

In the physical layer specification agreement of WCDMA system, all defined the CQI mapping table at each UE (UserEquipment, subscriber equipment) ability rating, comprise 30 kinds of CQI ranks, the different different channel quality conditions of CQI rank reflection.Channel quality at different stage, the terminal equipment separate provision of every kind of ability rating different transformats, comprise that the number, modulation system, reference power of employed transmission block size, physical channel adjusted data transmission parameters such as the factor, virtual cache size and redundancy version information.When specific implementation, portable terminal utilizes real-time measurement values, and sets up index relative between the defined CQI mapping table in the physical layer specification agreement, obtains corresponding transformat by the mode of tabling look-up, and reports network side as CQI information.

Realize the link circuit self-adapting transmission course of HSDPA in terminal equipment, the main difficult point problem that needs to solve has two: 1) structure and the corresponding CQI mapping table of UE ability rating, set up the correct index relative between real-time measurement values and the CQI mapping table; 2) assurance reports the correctness and the stability of the CQI information of network side.

For the TD-SCDMA system, in relevant physical layer specification agreement, do not formulate the CQI mapping table, do not define the corresponding relation between CQI information and transmission block size and the modulation system, just defined the corresponding relation between the transmission block size and transmitting block index in each physical layer classification.Although the CQI information that portable terminal reports to network side only comprises RMF and these two data transmission parameters of RTBS, but owing to there is not the related definition of CQI mapping table, and different UE ability ratings do not have fixing CQI information index and the corresponding relation between transmission block size and the modulation system, and this just makes that possible combined result becomes numerous and diverse unusually between different modulating mode and the transmission block size.

The adaptively selected of CQI information and reporting in the process, currently used method generally is divided into two kinds: 1), when UE selects CQI from certain initial value, adjust the transmitting block index value with fixed step size, after the transmitting block index value is adjusted to certain value, consider to change modulation system again; The problem that this method exists is: the adjustment step-length of the initial value of CQI, transmitting block index and the transfer point of modulation system are difficult to determine, can not really accomplish the adaptively selected of CQI information and report.2), UE is by measuring SINR (Signal-to-Interference-and-Noise Ratio, the ratio of signal power and interference and noise power), adopt emulation to determine transmitting block index value and transmission block size in conjunction with the method for fitting a straight line, determine modulation system according to physical layer handling capacity again, transmission block size and modulation system are reported network side as CQI information; The problem that this method exists is: UE is except the signal power and noise power of measuring receiving terminal, also need to measure the interference power of receiving terminal, just can obtain SINR, and the method for measurement more complicated of interference power, amount of calculation is bigger, increase the expense of processor, reduced processing speed, can not adapt to the requirement of HSDPA transmitting high speed data well.

Summary of the invention

The technical problem that the present invention solves is to provide a kind of link self-adaption transmission method and equipment, in order in the TD-SCDMA system, makes UE accurate when supporting that HSDPA is professional, efficient, and realizes simple.

A kind of link self-adaption transmission method is provided in the embodiment of the invention, has comprised the steps:

The HS-DSCH channel data that network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

Inquire about and the corresponding CQI mapping table of UE ability rating, obtain the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance;

Report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

Preferably, construct described CQI mapping table in advance, be specially:

HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Utilize the complex symbol sequence of joint-detection output, calculate the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

Bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average to be handled;

According to the statistical average result, construct described CQI mapping table.

Preferably, after the bit signal to noise ratio after obtaining demodulation, further comprise:

Bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

Preferably, the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter, is specially:

With the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval, be defined as the initial value of smothing filtering;

Since second Transmission Time Interval, the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtain the currency behind the smothing filtering.

Preferably, the described HS-DSCH channel data that network side in the current transmission time interval is provided carries out measurements and calculations, further comprises: generate HARQ information;

Described data transmission parameters comprises: equivalent code rate and modulation system;

Report described data transmission parameters, further comprise:

According to the physical resource number of equivalent code rate and current distribution, calculate RTBS;

RTBS and RMF are synthesized CQI information;

CQI information and HARQ information are reported to network side in the lump.

Preferably, the HS-DSCH channel data that provides of network side comprises: the HSDPA channel data of QPSK and 16QAM modulation system.

UE in a kind of TD-SCDMA mobile communication system also is provided in the embodiment of the invention, has comprised:

Measurement module, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

Enquiry module is used for inquiry and the corresponding CQI mapping table of UE ability rating, obtains the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance;

Reporting module is used to report described data transmission parameters, and being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

Preferably, further comprise:

Detection module is used for HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Computing module is used to utilize the complex symbol sequence of joint-detection output, calculates the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

The statistical average module is used for that the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average and handles;

Constructing module is used for according to the statistical average result, constructs described CQI mapping table.

Preferably, further comprise:

The smothing filtering module is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

Preferably, described smothing filtering module comprises:

Initialization unit is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval is defined as the initial value of smothing filtering;

Arithmetic element is used for since second Transmission Time Interval, and the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtains the currency behind the smothing filtering.

Preferably, described measurement module is further used for generating HARQ information;

Described data transmission parameters comprises: equivalent code rate and modulation system;

Described reporting module comprises:

Computing unit is used for the physical resource number according to equivalent code rate and current distribution, calculates RTBS;

Synthesis unit is used for RTBS and RMF are synthesized CQI information;

Report the unit, be used for CQI information and HARQ information are reported to network side in the lump.

A kind of TD-SCDMA mobile communication system also is provided in the invention process, has comprised:

Network equipment is used to provide the HS-DSCH channel data;

UE, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation; Inquire about and the corresponding CQI mapping table of UE ability rating, obtain the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance; Report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

Embodiment of the invention beneficial effect is as follows:

The embodiment of the invention provides and has been applicable to the precise and high efficiency when UE supports the HSDPA business in the TD-SCDMA system and realizes simple link circuit self-adapting transmission plan, when UE carries out the link circuit self-adapting process, can adjust code rate and modulation system adaptively, thereby guarantee the higher system throughput.

Further, because by based on the bit snr measurement after the demodulation, structure and the corresponding CQI mapping table of UE ability rating, thereby set up correct index relative between bit signal to noise ratio and the CQI mapping table.

Further,, improve the stationarity of bit signal-to-noise ratio measurements, thereby guarantee the accuracy of CQI reporting information owing to adopt the method for smothing filtering.

Description of drawings

Fig. 1 is the link self-adaption transmission method implementing procedure schematic diagram when the TD-SCDMA mobile communication system provides HSDPA professional in the embodiment of the invention;

Fig. 2 is the implementing procedure schematic diagram of structure CQI mapping table in the embodiment of the invention;

Fig. 3 is a smothing filtering implementing procedure schematic diagram in the embodiment of the invention;

Fig. 4 is that UE carries out link circuit self-adapting implementing procedure schematic diagram in the embodiment of the invention;

Fig. 5 is the UE structural representation in the TD-SCDMA mobile communication system in the embodiment of the invention;

Fig. 6 is a TD-SCDMA mobile communication system structural representation in the embodiment of the invention;

Fig. 7 is under the PA3 multidiameter fading channel environment, adopts the throughput of fixed reference channel arrangement method and the throughput performance that adopts the embodiment of the invention to compare;

Fig. 8 is under the VA30 multidiameter fading channel environment, adopts the throughput of fixed reference channel arrangement method and the throughput performance that adopts the embodiment of the invention to compare.

Embodiment

At the existing problem and shortage of HSDPA link self-adaption transmission method in the above-mentioned existing TD-SCDMA system, the embodiment of the invention provides and has been applicable to the precise and high efficiency when UE supports the HSDPA business in the TD-SCDMA system and realizes simple link circuit self-adapting transmission plan, below in conjunction with accompanying drawing the specific embodiment of the present invention is described.

The link self-adaption transmission method implementing procedure schematic diagram of Fig. 1 when providing HSDPA professional in the TD-SCDMA mobile communication system as shown in the figure, can comprise the steps: when carrying out Adaptive Transmission

Step 101, the HS-DSCH channel data that network side in the current transmission time interval is provided carry out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

In this step, the HS-DSCH channel data that network side provides can comprise: the HSDPA channel data of QPSK and 16QAM modulation system.

The corresponding CQI mapping table of step 102, inquiry and UE ability rating obtains the data transmission parameters of this bit signal to noise ratio correspondence;

CQI mapping table in this step is to form according to the structure of the bit signal to noise ratio after the demodulation of a plurality of Transmission Time Interval HS-DSCH channel data in advance;

Step 103, report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

Embodiment to above-mentioned steps describes below.

One, the structure of CQI mapping table.

Fig. 2 is the implementing procedure schematic diagram of structure CQI mapping table, as shown in the figure, during CQI mapping table in constitution step 102 in advance, can comprise the steps:

Step 201, HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Step 202, the complex symbol sequence of utilizing joint-detection to export are calculated the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

Step 203, the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average handle;

Step 204, according to the statistical average result, construct described CQI mapping table.

In concrete the enforcement, can be based on the bit snr measurement after the demodulation, structure and the corresponding CQI mapping table of UE ability rating.

In the TD-SCDMA system, suppose JD (Joint Detector, combined detector) Shu Chu complex symbol sequence be r (n) | 1≤n≤N}, wherein contain real useful signal component for s (n) | 1≤n≤N}, additive noise component be z (n) | 1≤n≤N}, N is the length of complex symbol sequence, and then r (n) can be expressed as:

R (n)=s (n)+z (n)----formula 1

By the real part of JD output symbol and the absolute value of imaginary part are carried out sum-average arithmetic, obtain average amplitude Mean_Amp, then the relation between the power of useful signal and the average amplitude Mean_Amp satisfies:

$P_s=\frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{\left|s\left(n\right)\right|}^2=\left\{\begin{array}{c}2\&CenterDot;{(\mathrm{Mean}\_\mathrm{Amp})}^2,\mathrm{<figure-callout\; id="10"\; label="forQPSK"\; filenames="H2008101840218E0000041.png"\; state="\{\{state\}\}">forQPSK</figure-callout>}\\ 10\&CenterDot;{\left(\frac{\mathrm{Mean}\_\mathrm{Amp}}{2}\right)}^2,\mathrm{for}16\mathrm{QAM}\end{array}\right.$ ----formula 2

Introducing the hard decision function slice () of complex symbol, is that { ± 1 ± j} is { a+jb|a=± 1, ± 3 for the hard decision result of 16QAM modulation symbol for the hard decision result of QPSK modulation symbol; B=± 1, ± 3}, then under muting condition, useful signal and hard decision result's pass is:

$s\left(n\right)=\left\{\begin{array}{c}\mathrm{Mean}\_\mathrm{Amp}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right),\mathrm{forQPSK}\\ \frac{\mathrm{Mean}\_\mathrm{<figure-callout\; id="2"\; label="Amp"\; filenames="H2008101840218E0000041.png"\; state="\{\{state\}\}">Amp</figure-callout>}}{2}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right),\mathrm{for}16\mathrm{QAM}\end{array}\right.$ ------formula 3

Then the computational methods of noise power are:

$P_n=\frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{\left|z\left(n\right)\right|}^2=\left\{\begin{array}{c}\frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{|r\left(n\right)-\mathrm{Mean}\_\mathrm{Amp}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right)|}^2,\mathrm{forQPSK}\\ \frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{|r\left(n\right)-\frac{\mathrm{Mean}\_\mathrm{<figure-callout\; id="2"\; label="Amp"\; filenames="H2008101840218E0000041.png"\; state="\{\{state\}\}">Amp</figure-callout>}}{2}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right)|}^2,\mathrm{for}16\mathrm{QAM}\end{array}\right.$ ----formula 4

For M system modulation (for QPSK, M=4; For 16QAM, M=16), the bit signal to noise ratio after the demodulation can be expressed as:

$\frac{{\mathrm{<figure-callout\; id="0"\; label="E\; b\; N"\; filenames="H2008101840218E0000041.png"\; state="\{\{state\}\}">E</figure-callout>}}_b}{N_{}}=\frac{1}{{\log }_{2}M}\&times;\frac{P_s}{P_n}=\left\{\begin{array}{c}\frac{{(\mathrm{Mean}\_\mathrm{Amp})}^2}{\frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{|r\left(n\right)-\mathrm{Mean}\_\mathrm{Amp}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right)|}^2},\mathrm{forQPSK}\\ \frac{5\&CenterDot;{\left(\frac{\mathrm{Mean}\_\mathrm{Amp}}{2}\right)}^2}{2\&CenterDot;\frac{1}{N}\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{|r\left(n\right)-\frac{\mathrm{Mean}\_\mathrm{<figure-callout\; id="2"\; label="Amp"\; filenames="H2008101840218E0000041.png"\; state="\{\{state\}\}">Amp</figure-callout>}}{2}\&CenterDot;\mathrm{slice}\left(s\left(n\right)\right)|}^2},\mathrm{for}16\mathrm{QAM}\end{array}\right.$ ---formula 5

Portable terminal need be with by the given HS-DSCH resource collection of network side as a reference when producing the CQI report, but it should be noted that UE when obtaining CQI information, only do not limit to and measure on above-mentioned given reference resources.The used reference resources of CQI report is portable terminal received HS-DSCH resource collection in a Transmission Time Interval, comprises a complete transmission block.

With reference to the QPSK given among the English protocol specification TS25.102:UE transmission and reception of 3GPP (TDD) and the HSDPA reference measure channel of 16QAM modulation system, as the given HS-DSCH resource collection of network side, the span of setting equivalent code rate is 1/3～1, for certain fixing equivalent code rate, obtaining BLER by Computer Simulation is bit signal-to-noise ratio measurements after pairing, the demodulation in 10% o'clock, structure and the corresponding CQI mapping table of UE ability rating are as shown in table 1 thus.

CQI mapping table when transmission HSDPA is professional in the table 1:TD-SCDMA system

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??0.009595	??0.333333	??QPSK
??0.024263	??0.340000	??QPSK
			??0.048604	??0.350000	??QPSK

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??0.075601	??0.360000	??QPSK
??0.105085	??0.370000	??QPSK
			??0.136887	??0.380000	??QPSK
??0.170837	??0.390000	??QPSK
			??0.206765	??0.400000	??QPSK
??0.244503	??0.410000	??QPSK
			??0.283881	??0.420000	??QPSK
??0.324729	??0.430000	??QPSK
			??0.366878	??0.440000	??QPSK
??0.410159	??0.450000	??QPSK
			??0.454403	??0.460000	??QPSK
??0.499439	??0.470000	??QPSK
			??0.545099	??0.480000	??QPSK
??0.591213	??0.490000	??QPSK
			??0.637612	??0.500000	??QPSK
??0.684198	??0.510000	??QPSK
			??0.731161	??0.520000	??QPSK
??0.778763	??0.530000	??QPSK
			??0.827266	??0.540000	??QPSK
??0.876931	??0.550000	??QPSK
			??0.928020	??0.560000	??QPSK
??0.980795	??0.570000	??QPSK

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??1.035518	??0.580000	??QPSK
??1.092451	??0.590000	??QPSK
			??1.151855	??0.600000	??QPSK
??1.213929	??0.610000	??QPSK
			??1.278617	??0.620000	??QPSK
??1.345803	??0.630000	??QPSK
			??1.415366	??0.640000	??QPSK
??1.487190	??0.650000	??QPSK
			??1.561157	??0.660000	??QPSK
??1.637146	??0.670000	??QPSK
			??1.715042	??0.680000	??QPSK
??1.794725	??0.690000	??QPSK
			??1.876077	??0.700000	??QPSK
??1.958990	??0.710000	??QPSK
			??2.043397	??0.720000	??QPSK
??2.129241	??0.730000	??QPSK
			??2.216465	??0.740000	??QPSK
??2.305012	??0.750000	??QPSK
			??2.394824	??0.760000	??QPSK
??2.485844	??0.770000	??QPSK
			??2.578016	??0.780000	??QPSK
??2.671282	??0.790000	??QPSK

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??2.765586	??0.800000	??QPSK
??2.861347	??0.810000	??QPSK
			??2.960897	??0.820000	??QPSK
??3.067044	??0.830000	??QPSK
			??3.182595	??0.840000	??QPSK
??3.310360	??0.850000	??QPSK
			??3.453145	??0.860000	??QPSK
??3.613760	??0.870000	??QPSK
			??3.795013	??0.880000	??QPSK
??3.999712	??0.890000	??QPSK
			??4.139829	??0.450000	??16QAM
??4.195977	??0.460000	??16QAM
			??4.251349	??0.470000	??16QAM
??4.305830	??0.480000	??16QAM
			??4.359304	??0.490000	??16QAM
??4.411656	??0.500000	??16QAM
			??4.462818	??0.510000	??16QAM
??4.512910	??0.520000	??16QAM
			??4.562098	??0.530000	??16QAM
??4.610550	??0.540000	??16QAM
			??4.658432	??0.550000	??16QAM
??4.705910	??0.560000	??16QAM

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??4.753153	??0.570000	??16QAM
??4.800327	??0.580000	??16QAM
			??4.847598	??0.590000	??16QAM
??4.895133	??0.600000	??16QAM
			??4.943129	??0.610000	??16QAM
??4.991901	??0.620000	??16QAM
			??5.041791	??0.630000	??16QAM
??5.093146	??0.640000	??16QAM
			??5.146307	??0.650000	??16QAM
??5.201621	??0.660000	??16QAM
			??5.259430	??0.670000	??16QAM
??5.320079	??0.680000	??16QAM
			??5.383911	??0.690000	??16QAM
??5.451272	??0.700000	??16QAM
			??5.522391	??0.710000	??16QAM
??5.597041	??0.720000	??16QAM
			??5.674884	??0.730000	??16QAM
??5.755579	??0.740000	??16QAM
			??5.838786	??0.750000	??16QAM
??5.924165	??0.760000	??16QAM
			??6.011376	??0.770000	??16QAM
??6.100079	??0.780000	??16QAM

Bit signal to noise ratio (dB)	The equivalence code rate	Modulation system
			??6.189934	??0.790000	??16QAM
??6.280602	??0.800000	??16QAM
			??6.372358	??0.810000	??16QAM
??6.467940	??0.820000	??16QAM
			??6.570705	??0.830000	??16QAM
??6.684005	??0.840000	??16QAM
			??6.811197	??0.850000	??16QAM
??6.955635	??0.860000	??16QAM
			??7.120673	??0.870000	??16QAM
??7.309667	??0.880000	??16QAM
			??7.525971	??0.890000	??16QAM
??7.772940	??0.900000	??16QAM
			??8.053928	??0.910000	??16QAM
??8.372291	??0.920000	??16QAM
			??8.731383	??0.930000	??16QAM
??9.134558	??0.940000	??16QAM
			??9.585173	??0.950000	??16QAM
??10.086580	??0.960000	??16QAM
			??10.642135	??0.970000	??16QAM
??11.255194	??0.980000	??16QAM
			??11.929109	??0.990000	??16QAM
??12.667237	??1.000000	??16QAM

Two, the enforcement of smothing filtering

Adopt the method for smothing filtering, can improve the stationarity of bit signal-to-noise ratio measurements.That is, after the bit signal to noise ratio after obtaining demodulation, further comprise:

Bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

Fig. 3 is a smothing filtering implementing procedure schematic diagram, and as shown in the figure, the smothing filtering flow process can comprise the steps: in the specific implementation

Step 301, with the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval, be defined as the initial value of smothing filtering;

Step 302, since second Transmission Time Interval, the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtain the currency behind the smothing filtering.

At structure during with the corresponding CQI mapping table of UE ability rating, Computer Simulation is by the bit signal-to-noise ratio measurements that obtains in a plurality of Transmission Time Intervals being carried out the method for statistical average, reach the purpose that reduces estimated bias, thereby guarantee the accuracy of CQI mapping table.When yet UE obtains CQI information in real mobile environment, the bit signal-to-noise ratio measurements that obtains in a Transmission Time Interval can may produce bigger fluctuation because of the influence of interference, noise and decline, for this reason, can adopt the method for smothing filtering, improve the stationarity of bit signal-to-noise ratio measurements.

In step 301, in first receives the Transmission Time Interval of HS-DSCH resource collection, measure the bit signal to noise ratio after the demodulation, obtain the initial value of smothing filtering: X (k) is (k=1);

In step 302, since second Transmission Time Interval that receives the HS-DSCH resource collection, with the bit signal to noise ratio X (k) (k 〉=2) after the demodulation that measures in the current transmission time interval, carry out smothing filtering with the historical accumulated value Y (k-1) (k 〉=2) of bit signal to noise ratio, obtain the currency Y (k) (k 〉=2) behind the smothing filtering, physical relationship can be expressed as follows:

Y(k)＝α·X(k)+(1-α)·Y(k-1)，k≥2

Y (k)=X (k), k=1----formula 6

In the formula, α is a forgetting factor, and span is [0,1], can determine by Computer Simulation, can be disposed by software flexible when realizing in system.

Three, UE carries out the link circuit self-adapting process.

When the HS-DSCH channel data that network side provides in step 101 pair current transmission time interval carries out measurements and calculations, can further include: generate HARQ information;

Data transmission parameters in the step 103 can comprise: equivalent code rate and modulation system;

When then reporting described data transmission parameters, may further include:

According to the physical resource number of equivalent code rate and current distribution, calculate RTBS;

RTBS and RMF are synthesized CQI information;

CQI information and HARQ information are reported to network side in the lump.

Fig. 4 carries out link circuit self-adapting implementing procedure schematic diagram for UE, and as shown in the figure, UE carries out the link circuit self-adapting process can be divided into following steps:

The resource indication information that step 401, UE issue according to network side receives the data on the HS-DSCH channel in the Transmission Time Interval of regulation, and generates HARQ information (ACK/NACK); Simultaneously by measurements and calculations, obtain the bit signal to noise ratio behind the smothing filtering;

Step 402, UE utilize table 1, determine pairing equivalent code rate of this bit signal to noise ratio and modulation system by the mode of tabling look-up;

Step 403, UE calculate RTBS according to the physical resource number of equivalent code rate and current distribution, are reported to network side together with synthetic CQI information of corresponding RMF and HARQ information (ACK/NACK).

The resource indication information that UE issues after upgrading according to network side, repeating step 401～step 403 is until the professional end of transmission of HSDPA.

Based on same inventive concept, UE in a kind of TD-SCDMA mobile communication system, a kind of TD-SCDMA mobile communication system also are provided in the embodiment of the invention, because the link self-adaption transmission method of the equipment principle of dealing with problems when the HSDPA business is provided is identical, enforcement that can reference method when therefore equipment is implemented repeats part and repeats no more.

Fig. 5 is the UE structural representation in the TD-SCDMA mobile communication system, as shown in the figure, can comprise among the UE:

Measurement module 501, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

Enquiry module 502 is used for inquiry and the corresponding CQI mapping table of UE ability rating, obtains the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance;

Reporting module 503 is used to report described data transmission parameters, and being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

In order to set up the correct index relative between bit signal to noise ratio and the CQI mapping table, can further include among the UE:

Detection module 504 is used for HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Computing module 505 is used to utilize the complex symbol sequence of joint-detection output, calculates the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

Statistical module 506 is used for that the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average and handles;

Constructing module 507 is used for according to the statistical average result, constructs described CQI mapping table.

In order to improve the stationarity of bit signal-to-noise ratio measurements, thereby guarantee the accuracy of CQI reporting information, can further include among the UE:

Smothing filtering module 508 is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

In concrete the enforcement, the smothing filtering module can comprise:

Initialization unit is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval is defined as the initial value of smothing filtering;

Arithmetic element is used for since second Transmission Time Interval, and the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtains the currency behind the smothing filtering.

In concrete the enforcement, the measurement module among the UE can be further used for generating HARQ information;

Can comprise in the data transmission parameters: equivalent code rate and modulation system;

Then can comprise in the reporting module:

Computing unit is used for the physical resource number according to equivalent code rate and current distribution, calculates RTBS;

Synthesis unit is used for RTBS and RMF are synthesized CQI information;

Report the unit, be used for CQI information and HARQ information are reported to network side in the lump.

Fig. 6 is a TD-SCDMA mobile communication system structural representation, as shown in the figure, can comprise in the system:

Network equipment 601 is used to provide the HS-DSCH channel data;

UE602, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation; Inquire about and the corresponding CQI mapping table of UE ability rating, obtain the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance; Report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

It is as follows to carry out the emulation testing result by the technical scheme that provides in the above-mentioned embodiment of the invention:

Simulated conditions:

In the HSDPA system, HS-DSCH is carried out throughput (Throughput) emulation statistics;

Statistics number is made as 3200, i.e. 3200 transmission blocks independently, and the maximum retransmission of each transmission block is 4;

The redundancy version parameters value is: 0,0,0,0} (QPSK modulation) and 6,2,1,5} (16QAM modulation);

Forgetting factor α value in the smothing filtering process is: 0.9;

Adopt 3GPP 25.102 agreement defineds, 2.2Mbps grade terminal variable reference measured channel, its parameter configuration is as shown in table 2;

Table 2:2.2Mbps grade terminal variable reference measured channel test parameter

Parameter name	Parameter value
		Scrambler and basic midamble code's numbering	??1
The HARQ number of processes	??1
		The HARQ maximum retransmission	??4
The Resource Unit that distributes	4 time slots, 10 code channel/time slots, spreading factor are 16, altogether 40 Resource Unit/5 millisecond
		Intermediate code (Midamble) length	144 chips

Multidiameter fading channel model: PA3 (walking environment, translational speed are 3 kilometers/hour) and VA30 (vehicle environment, translational speed are 30 kilometers/hour), its parameter configuration is as shown in table 3.

Table 3: multidiameter fading channel model parameter configuration (PA3 and VA30)

Simulation result:

Fig. 7 and Fig. 8 are respectively under PA3 (3 kilometers/hour of walking environment) and two kinds of multidiameter fading channel environment of VA30 (30 kilometers/hour of vehicle environments), adopt fixed reference channel arrangement method and the throughput performance that adopts chain circuit self-adaptive method proposed by the invention to compare.As can be seen, no matter under PA3 or VA30 channel circumstance, when carrying out the high-speed data service transmission, can obtain than adopting the much higher throughput of system of fixed reference channel arrangement method according to the link adaptation scheme that is proposed in the embodiment of the invention; And compare with existing algorithm, the link adaptation scheme that the embodiment of the invention proposed is precise and high efficiency not only, and realizes simply, can adapt to the requirement of transmission HSDPA high-speed data in the TD-SCDMA system well.

Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.

The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Claims (12)

1. a link self-adaption transmission method is characterized in that, comprises the steps:

The high speed downlink shared channel HS-DSCH channel data that network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

Inquire about and the corresponding channel quality indicator (CQI) mapping table of user equipment (UE) ability rating, obtain the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance;

Report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

2. the method for claim 1 is characterized in that, constructs described CQI mapping table in advance, is specially:

HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Utilize the complex symbol sequence of joint-detection output, calculate the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

Bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average to be handled;

According to the statistical average result, construct described CQI mapping table.

3. method as claimed in claim 1 or 2 is characterized in that, after the bit signal to noise ratio after obtaining demodulation, further comprises:

Bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

4. method as claimed in claim 3 is characterized in that, the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter, is specially:

With the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval, be defined as the initial value of smothing filtering;

Since second Transmission Time Interval, the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtain the currency behind the smothing filtering.

5. the method for claim 1 is characterized in that, the described HS-DSCH channel data that network side in the current transmission time interval is provided carries out measurements and calculations, further comprises: generate and mix automatic repeat requests HARQ information;

Described data transmission parameters comprises: equivalent code rate and modulation system;

Report described data transmission parameters, further comprise:

According to the physical resource number of equivalent code rate and current distribution, the transmission block of calculated recommendation size RTBS;

The modulation system RMF of RTBS and recommendation is synthesized CQI information;

CQI information and HARQ information are reported to network side in the lump.

6. the method for claim 1 is characterized in that, the HS-DSCH channel data that network side provides comprises: the high-speed downlink packet access HSDPA channel data of Quadrature Phase Shift Keying QPSK or 16 quadrature amplitude modulation 16QAM modulation systems.

7. a UE who is applied in the TD-SCDMA mobile communication system is characterized in that, comprising:

Measurement module, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation;

Enquiry module is used for inquiry and the corresponding CQI mapping table of UE ability rating, obtains the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance;

Reporting module is used to report described data transmission parameters, and being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

8. UE as claimed in claim 7 is characterized in that, further comprises:

Detection module is used for HS-DSCH channel data in a plurality of Transmission Time Intervals is carried out joint-detection;

Computing module is used to utilize the complex symbol sequence of joint-detection output, calculates the bit signal to noise ratio after the demodulation of HS-DSCH channel data in described a plurality of Transmission Time Interval;

The statistical average module is used for that the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out statistical average and handles;

Constructing module is used for according to the statistical average result, constructs described CQI mapping table.

9. UE as claimed in claim 8 is characterized in that, further comprises:

The smothing filtering module is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in described a plurality of Transmission Time Intervals is carried out The disposal of gentle filter.

10. UE as claimed in claim 9 is characterized in that, described smothing filtering module comprises:

Initialization unit is used for the bit signal to noise ratio after the HS-DSCH channel data demodulation in first Transmission Time Interval is defined as the initial value of smothing filtering;

Arithmetic element is used for since second Transmission Time Interval, and the historical accumulated value of bit signal to noise ratio after the HS-DSCH channel data demodulation in the current transmission time interval and bit signal to noise ratio is carried out smothing filtering, obtains the currency behind the smothing filtering.

11. UE as claimed in claim 7 is characterized in that, described measurement module is further used for generating HARQ information;

Described data transmission parameters comprises: equivalent code rate and modulation system;

Described reporting module comprises:

Computing unit is used for the physical resource number according to equivalent code rate and current distribution, calculates RTBS;

Synthesis unit is used for RTBS and RMF are synthesized CQI information;

Report the unit, be used for CQI information and HARQ information are reported to network side in the lump.

12. a TD-SCDMA mobile communication system is characterized in that, comprising:

Network equipment is used to provide the HS-DSCH channel data;

UE, the HS-DSCH channel data that is used for network side in the current transmission time interval is provided carries out measurements and calculations, the bit signal to noise ratio after the acquisition demodulation; Inquire about and the corresponding CQI mapping table of UE ability rating, obtain the data transmission parameters of this bit signal to noise ratio correspondence; Described CQI mapping table is to form according to the structure of the bit signal to noise ratio after the HS-DSCH channel data demodulation in a plurality of Transmission Time Intervals in advance; Report described data transmission parameters, being used for network side provides HS-DSCH channel data in next Transmission Time Interval.

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