CN105493550B - The feedback method and user equipment of channel quality instruction - Google Patents
The feedback method and user equipment of channel quality instruction Download PDFInfo
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- CN105493550B CN105493550B CN201380000491.3A CN201380000491A CN105493550B CN 105493550 B CN105493550 B CN 105493550B CN 201380000491 A CN201380000491 A CN 201380000491A CN 105493550 B CN105493550 B CN 105493550B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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Abstract
The application provides the feedback method and user equipment of a kind of channel quality instruction, feedback method includes: before the initial time of reporting channel quality instruction arrives, it obtains CPICH Common Pilot Channel and plays the signal quality in continuous N 1/N time slot in 1/N time slot before initial time, N is greater than 1；The signal quality of calculating is calculated according to M signal quality, and maps to obtain the channel quality indicator (CQI) of CPICH Common Pilot Channel according to the signal quality of calculating and is reported to base station.Reference measure point and gap of the application by change measuring signal quality, improve the accuracy rate of measuring signal quality, thereby reduce the error for being reported to the CQI of base station.
Description
Technical field
The invention belongs to fields of communication technology, and in particular to a kind of user equipment further relates to a kind of letter of user equipment
The feedback method of road quality instruction.
Background technique
In order to improve the transmission rate of downlink data, 3GPP (The 3rd generation Partnership
Project, third generation partner program) introduce HSDPA technology (High Speed Downlink Packet Access,
High-speed slender body theory).AMC (Adaptive Modulation and is used in high speed downlink packet access technology
Coding, adaptive coding and modulating) technology, the basic principle is that the modulation system and coding speed of adaptive adjustment transmission data
Rate with compensation as the influence of fading caused by signal such as channel variation, and then improves the signal quality performance of signal.
For example, when (User Equipment, the user terminal) position UE is closer away from NodeB (base station), channel condition compared with
Good, data are transmitted with higher level modulation system and code rate in base station, for example, by using 16 rank QAM (Quadrature
Amplitude Modulation, quadrature amplitude modulation) and 3/4Turbo encoder bit rate；And when location of user equipment away from base station compared with
When remote, channel condition is poor, and data are transmitted with the modulation system of lower grade and code rate in base station, for example, by using QPSK
(Quadrature Phase Shift Keying, orthogonal PSK) and 1/2Turbo encoder bit rate.
Specifically, in order to realize adaptive coding and modulating, user equipment is needed to be obtained according to current reception channel quality
SINR (Signal to interference and Noise Ratio, signal and interference and noise ratio) is obtained, then by signal
It is mapped to CQI (Channel Quality Information, channel quality instruction) with interference and noise ratio, and by the channel
Quality indication feedback is determined to base station, base station further according to channel quality instruction and comprehensive other information (such as physical resource etc.)
Send modulation system and the code rate etc. of downlink data.
However, prior art user equipment is generally according to CPICH (Common Pilot Channel, CPICH Common Pilot Channel)
Quality obtain signal and interference and noise ratio, then by preset mapping relations according to signal and interference and noise than mapping
Channel quality instruction is obtained, and uses certain report cycle by the channel quality indication feedback to base station.
The mode of this acquisition signal of the prior art and interference and noise ratio can not reflect actual channel quality, and
And it is more larger than the error for causing channel quality to indicate using instantaneous signal and interference and noise, therefore lead to the lower line number of base station
It is relatively low according to throughput.
Summary of the invention
The application mainly solving the technical problems that solve user equipment to report road quality instruction error it is larger, cause
The downlink data throughput of base station is relatively low.
In view of this, the embodiment of the present application provides the feedback method and user equipment of a kind of channel quality instruction, to reduce
The error of channel quality instruction.
The application first aspect provides a kind of feedback method of channel quality instruction, comprising: indicates in reporting channel quality
Initial time arrive before, user equipment obtains CPICH Common Pilot Channel 1/N time slot before the initial time company
Signal quality in continuous M 1/N time slot, wherein N is the natural number greater than 1, and M is the natural number more than or equal to 1；According to M institute
The signal quality that calculating is calculated in signal quality is stated, and maps to obtain CPICH Common Pilot Channel according to the signal quality of the calculating
Channel quality indicator (CQI)；When the initial time arrives, the CQI is reported to base station.
With reference to first aspect, in the first possible implementation, described that calculating is calculated according to M signal quality
Signal quality the step of include: to pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal quality of the calculating is calculated,
In, Q is the signal quality of the calculating, Q1、Q2…QMFor the M signal qualities, p1、p2…pMFor the coefficient more than or equal to 0
And p1+p2+…+pM=1.
The possible implementation of with reference to first aspect the first, in the second possible implementation, the signal
Quality is chip energy orthogonal interference ratio.It is described to pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal of the calculating is calculated
The step of quality, specifically includes: passing through Ec/Nt=p1*Ec1/Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMCalculating is calculated
Chip energy orthogonal interference ratio, wherein EcMFor m-th chip energy, NtMFor m-th orthogonal interference, Ec1/Nt1、Ec2/Nt2…
EcM/NtMRespectively the 1st, 2 ... M chip energy orthogonal interference ratios, Ec/Nt are the chip energy orthogonal interference ratio calculated.Institute
It states and the step of obtaining the channel quality indicator (CQI) of CPICH Common Pilot Channel is mapped according to the signal quality of the calculating specifically includes:
Channel quality indicator (CQI) is obtained by CQI=Ec/Nt+ γ mapping calculation, wherein γ is mapping regulating constant.
The application second aspect provides a kind of user equipment, including measurement module, computing module and sending module.The survey
It measures module to be used for before the initial time that reporting channel quality indicates arrives, obtains CPICH Common Pilot Channel in the initial time
1/N time slot before plays the signal quality in continuous N 1/N time slot, wherein N is natural number greater than 1, M for more than or equal to
1 natural number；Calculating is calculated in the M signal qualities that the computing module is used to be got according to the measurement module
Signal quality, and mapped to obtain the CQI of CPICH Common Pilot Channel according to the signal quality of the calculating；The sending module is used for
When the initial time arrives, the CQI that the computing module is calculated is reported to base station.
In conjunction with second aspect, in the first possible implementation, the computing module is specifically used for passing through Q=p1*Q1
+p2*Q2+…+pM*QMThe signal quality of the calculating is calculated, wherein Q is the signal quality of the calculating, Q1、Q2…QM
For the M signal qualities, p1、p2…pMFor the coefficient and p more than or equal to 01+p2+…+pM=1.
In conjunction with the first possible implementation of second aspect, in the second possible implementation, the measurement
The signal quality that module acquires is chip energy orthogonal interference ratio, and the computing module is specifically used for passing through Ec/Nt
=p1*Ec1/Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMThe chip energy orthogonal interference ratio of calculating is calculated, and passes through CQI
=Ec/Nt+ γ mapping calculation obtains channel quality indicator (CQI), wherein EcMFor m-th chip energy, NtMIt is orthogonal dry for m-th
It disturbs, Ec1/Nt1、Ec2/Nt2…EcM/NtMRespectively the 1st, 2 ... M chip energy orthogonal interference ratios, Ec/Nt are the code calculated
Piece energy orthogonality interferes ratio, and γ is mapping regulating constant.
The application improves the accurate of measuring signal quality by the reference measure point and time slot of change measuring signal quality
Rate thereby reduces the error for feeding back to the CQI of base station.
Detailed description of the invention
Fig. 1 is the schematic diagram for realizing one embodiment of the system of feedback method of the application channel quality instruction；
Fig. 2A is the flow diagram of one embodiment of feedback method of the application channel quality instruction；
Fig. 2 B is that the feedback method of the present embodiment channel quality instruction obtains the schematic diagram of signal quality；
Fig. 3 is the flow diagram of another embodiment of feedback method of the application channel quality instruction；
Fig. 4 is the module frame chart of one embodiment of the application user equipment；
Fig. 5 is the module frame chart of another embodiment of the application user equipment；And
Fig. 6 is the module frame chart of one embodiment of base station for the application.
Specific embodiment
In being described below, for illustration and not for limitation, propose such as specific system structure, interface, technology it
The detail of class, so as to provide a thorough understanding of the present application.However, it will be clear to one skilled in the art that there is no these specific
The application also may be implemented in the other embodiments of details.In other situations, omit to well-known device, circuit and
The detailed description of method, so as not to obscure the description of the present application with unnecessary details.
The techniques described herein may be used in various communication systems, such as current 2G, 3G communication system and next generation communication
System, such as global system for mobile communications (GSM, Global System for Mobile communications), code point are more
Location (CDMA, Code Division Multiple Access) system, time division multiple acess (TDMA, Time Division
Multiple Access) system, wideband code division multiple access (WCDMA, Wideband Code Division Multiple
Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, just
Frequency division multiple access (OFDMA, the Orthogonal Frequency-Division Multiple Access) system of friendship, single carrier
FDMA (SC-FDMA) system, General Packet Radio Service (GPRS, General Packet Radio Service) system are long
Phase evolution (LTE, Long Term Evolution) system and other such communication systems.
Various aspects are described herein in connection with user equipment and/or base station and/or base station controller.
User equipment can be wireless terminal and be also possible to catv terminal, and wireless terminal can be directed to user and provide language
The equipment of sound and/or data connectivity has the handheld device of wireless connecting function or is connected to radio modem
Other processing equipments.Wireless terminal can through wireless access network (for example, RAN, Radio Access Network) with one or
Multiple cores net is communicated, and wireless terminal can be mobile terminal, such as mobile phone (or be " honeycomb " phone) and is had
The computer of mobile terminal, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile dress
It sets, they exchange language and/or data with wireless access network.For example, personal communication service (PCS, Personal
Communication Service) phone, wireless phone, Session initiation Protocol (SIP) phone, wireless local loop (WLL,
Wireless Local Loop) it stands, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Nothing
Line terminal is referred to as system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), moves
Dynamic station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access
Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User
Terminal), user agent (User Agent), user equipment (User Device) or user equipment (User
Equipment)。
Base station (for example, access point), which can be, to be referred to the accession in net in the sky on interface by one or more sectors and wireless
The equipment of terminal communication.The air frame that base station can be used for receive and IP grouping are mutually converted, as wireless terminal with connect
Router between the rest part of networking, wherein the rest part for accessing net may include Internet protocol (IP) network.Base station is also
Attribute management of the tunable to air interface.
For example, base station can be the base station controller (Base Station Controller, BSC) or 3G in 2G network
Radio network controller (Radio Network Controller, RNC) in network or the evolved node B in LTE network
(evolved Node B,eNodeB).For example, base station can be base station (BTS, the Base Transceiver in GSM or CDMA
Station), be also possible to the base station (NodeB) in WCDMA, can also be in LTE evolved base station (NodeB or eNB or
E-NodeB, evolutional Node B), the application does not limit.
Base station controller can be base station controller (BSC, the base station in GSM or CDMA
Controller), the radio network controller (RNC, Radio Network Controller) being also possible in WCDMA, this
Application does not limit.
In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/
Or ", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, it can be with table
Show: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character "/" herein, typicallys represent front and back
Affiliated partner is a kind of relationship of "or".
Refering to fig. 1, Fig. 1 is the upper syndicate for realizing the channel quality instruction of the feedback method of the application channel quality instruction
The schematic diagram of one embodiment of system.
The reporting system of the channel quality instruction of the present embodiment includes but is not limited to base station 110 and user equipment 120.Its
In, user equipment 120 can be established with base station 110 (or other assistant base stations etc.) and is wirelessly connected.It should be noted that the application
Channel quality instruction feedback method can be shown in Fig. 1 channel quality instruction reporting system in user equipment 120
Upper realization.
In general, the user equipment 120 in the cell that base station 110 is covered can be communicated with base station 110.
Consider that base station 110 is not aware that the case where signal of transmission is received by user equipment 120 due to various reasons,
It may be very well, it is also possible to which very poor, which kind of modulation methods the case where network side needs to know the reception signal of UE to determine using
Formula and code rate transmit data.Therefore, the application obtains signal according to current reception channel quality by user equipment 120
With interference and noise ratio, signal and interference and noise ratio are then mapped to channel quality instruction, and the channel quality is indicated
Base station 110 is fed back to, base station 110 determines base further according to channel quality instruction and comprehensive other information (such as physical resource etc.)
It stands 110 modulation systems and code rate etc. for sending downlink datas, to improve the channel between base station 110 and user equipment 120
Quality, and then improve the downlink data throughput of base station 110.
It is the process signal of one embodiment of feedback method of the application channel quality instruction refering to Fig. 2A and Fig. 2 B, Fig. 2A
Figure, Fig. 2 B are that the feedback method of the present embodiment channel quality instruction obtains the schematic diagram of signal quality, the present embodiment feedback method
Including but not limited to following steps.
Step S201, before the initial time of reporting channel quality instruction arrives, user equipment obtains public guide frequency letter
The signal quality in continuous N 1/N time slot is played in 1/N time slot before initial time in road, wherein N is the nature greater than 1
Number, M are the natural number more than or equal to 1.
In step s 201, as shown in Figure 2 B, N=2 is taken, when M=3, at this point, be that 1/2 time slot rises apart from initial time,
User equipment will acquire the signal quality of continuous three 1/2 time slots on CPICH Common Pilot Channel；Certainly, N may be 3,4 or its
His natural number, M can be 4,5 or other numbers, for example take N=4, M=5, at this point, user equipment will be from being 1/ apart from initial time
4 time slots play the signal quality of continuous five 1/4 time slots on CPICH Common Pilot Channel, and specific implementation process is led in this technology
In the range of domain personnel understand, do not state carefully.In addition, signal quality can be signal-to-noise ratio or signal and interference and noise ratio etc.,
It is not construed as limiting, it is preferable that the signal quality of the present embodiment is chip energy orthogonal interference ratio.
For S-UMTS (Scalable Universal Mobile Telecommunications System, it is expansible
Universal Mobile Telecommunications System) for, since its TTI (transmission time interval) or time slot are all than UMTS (Universal
Mobile Telecommunications System, Universal Mobile Telecommunications System) TTI or the time interval of time slot to grow,
For example the TTI of S-UMTS is 4 milliseconds, and the TTI of UMTS is 2 milliseconds, at this point, the prior art measures obtained by single TTI or time slot
To signal quality cannot will more realistically reflect the actual mass situation of CPICH Common Pilot Channel, and lead to the signal quality measured
Error is larger, and then the CQI error for causing mapping to obtain is larger.In order to efficiently solve this technical problem, the present embodiment is logical
It crosses and changes reference measure point and time slot that user equipment obtains CPICH Common Pilot Channel, shorten the slot length of measurement, therefore can
Measure more accurate signal quality.
The signal quality of calculating is calculated according to M signal quality, and is reflected according to the signal quality of calculating by step S202
It penetrates to obtain the channel quality indicator (CQI) of CPICH Common Pilot Channel.
In step S202, the present embodiment can pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal of calculating is calculated
Quality, wherein Q is the signal quality calculated, Q1、Q2…QMFor M signal quality, p1、p2…pMFor the coefficient more than or equal to 0 and
p1+p2+…+pM=1.
It should be noted that p1、p2…pMBetween can be essentially equal, that is, take Q1、Q2…QMAverage value as calculate
Signal quality Q it is of course also possible to which taking M-1 therein is 0, or takes the p closest to initial timeMWeight it is maximum, or
Its weight size is determined in the way of arithmetic progression, or takes the signal matter that can most reflect CPICH Common Pilot Channel according to the actual situation
Some Q of amountxPXWeight be in the range of those skilled in the art understands, to be not construed as limiting 1/2 to calculate etc..
It is worth noting that, when the signal quality that the present embodiment measurement obtains is chip energy orthogonal interference ratio, step
The process for " signal quality of calculating being calculated according to M signal quality " in S202 specifically includes: passing through Ec/Nt=p1*Ec1/
Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMThe chip energy orthogonal interference ratio of calculating is calculated, wherein EcMFor m-th chip
Energy, NtMFor m-th orthogonal interference, it is preferable that NtMTo eliminate the orthogonal interference of current area, Ec1/Nt1、Ec2/Nt2…
EcM/NtMIt is then respectively the 1st, 2 ... M chip energy orthogonal interference ratio, Ec/Nt is the chip energy orthogonal interference ratio calculated.
Correspondingly, " referred to according to the channel quality that the signal quality of calculating maps to obtain CPICH Common Pilot Channel in step S202
Show that the process of CQI " specifically includes: channel quality indicator (CQI) is obtained by CQI=Ec/Nt+ γ mapping calculation, wherein γ is to reflect
Penetrate regulating constant.For example, γ can be set as different current gain values, can also by γ=10lg16+MPO+A come
It is calculated, MPO is that network side issues biasing constant, and A is Fixed constant, and 10lg16 is HS-PDSCH (High
Speed Physical Downlink Shared Channel, high-speed physical downlink shared channel (HS-PDSCH)) spreading gain, in this skill
In the range of art field personnel understand, the specific value of MPO and A are not limited.
CQI is reported to base station when initial time arrives by step S203.
The present embodiment improves the standard of measuring signal quality by the reference measure point and time slot of change measuring signal quality
True rate thereby reduces the error for feeding back to the CQI of base station.
Referring to Fig. 3, being the flow diagram of another embodiment of feedback method of the application channel quality instruction, this implementation
Example feedback method includes but is not limited to following steps.
Step S301, user equipment measure the first signal quality of time of reception high-speed physical downlink shared channel (HS-PDSCH) and public
The second signal quality of pilot channel.
In step S301, since the CQI that prior art user equipment is reported to base station is substantially to report basis to base station
The signal quality for the reflection high-speed physical downlink shared channel (HS-PDSCH) signal quality that the signal quality of CPICH Common Pilot Channel maps refers to
Show, also i other words the signal quality for first measuring CPICH Common Pilot Channel carries out mapping processing again and obtains CQI, this process causes
The CQI of report there is a certain error and when ductility.The present embodiment directly measures the first signal of high-speed physical downlink shared channel (HS-PDSCH)
Quality simultaneously carries out relevant treatment, can reduce to a certain extent the CQI reported error and when ductility.
Step S302 calculates the difference between first signal quality and the second signal quality.
In step s 302, Δ=b can be passed through1-b2It is calculated, wherein b1For the first signal quality, b2It is second
Signal quality, Δ are difference.
Step S303, CPICH Common Pilot Channel before the initial time of measurement reporting channel quality instruction in a cycle
The signal quality of calculating is calculated by the difference and the third signal quality for third signal quality.
In step S303, Q=Δ+b can be passed through3The signal quality Q, b of calculating is calculated3For third signal quality.
It should be noted that the public guide frequency letter before the initial time of measurement reporting channel quality instruction in a cycle
During the third signal quality in road, the present embodiment survey calculation can be obtained by the way of the relevant embodiment description in front
To third signal quality.Specifically, user equipment obtains public before the initial time of reporting channel quality instruction arrives
Pilot channel plays the signal quality in continuous N 1/N time slot in 1/N time slot before initial time, wherein N is greater than 1
Natural number, M are the natural number more than or equal to 1；It is weighted to obtain third signal quality according to M signal quality.Wherein,
Its concrete implementation process also please refers to the associated description of preceding embodiment, in the range of those skilled in the art understands, no
It repeats.
Step S304 carries out mapping processing to the signal quality of the calculating to obtain channel quality indicator (CQI).
The CQI is reported to base station by step S305.
It is not difficult to find out that the present embodiment passes through b1-b2Available CPICH Common Pilot Channel and Physical Downlink Shared Channel due to when
Channel quality brought by ductility indicates difference DELTA, then adds on the basis of the instruction of the third channel quality of CPICH Common Pilot Channel
Difference DELTA, ductility bring error when can effectively reduce；Meanwhile the channel quality to be reported that the present embodiment is handled
Instruction can more compare the quality for being truly reflected Physical Downlink Shared Channel.The present embodiment base station can be made according to CQI and
Comprehensive other information (such as physical resource etc.) improves modulation system and the code rate etc. that determine base station transmission downlink data
Channel quality between base station and user equipment, and improve the downlink data throughput of base station.
Referring to Fig. 4, be the module frame chart of one embodiment of the application user equipment, the present embodiment user equipment includes but not
It is limited to measurement module 41, computing module 42 and sending module 43.
Measurement module 41 is specifically used for before the initial time that reporting channel quality indicates arrives, and obtains public guide frequency letter
The signal quality in continuous N 1/N time slot is played in 1/N time slot before initial time in road, wherein N is the nature greater than 1
Number, M are the natural number more than or equal to 1.
Referring again to Fig. 2 B, N=2 is taken, when M=3, at this point, be that 1/2 time slot rises apart from initial time, measurement module 31
Obtain the signal quality of continuous three 1/2 time slots on CPICH Common Pilot Channel；Certainly, N may be 3,4 or other natural numbers, M
It can be 4,5 or other numbers, for example take N=4, M=5, at this point, user equipment will be from being 1/4 time slot apart from initial time
The signal quality of continuous five 1/4 time slots on CPICH Common Pilot Channel, specific implementation process are managed in those skilled in the art
In the range of solution, do not state carefully.In addition, signal quality can be signal-to-noise ratio or signal and interference and noise ratio etc., it certainly, can also
Think chip energy orthogonal interference ratio, is not construed as limiting.
For S-UMTS, the time interval of TTI or time slot due to its TTI or time slot all than UMTS
It grows, for example the TTI of S-UMTS is 4 milliseconds, and the TTI of UMTS is 2 milliseconds, at this point, the prior art measures single TTI or time slot
Obtained signal quality cannot will more realistically reflect the actual mass situation of CPICH Common Pilot Channel, and lead to the signal measured
Quality error is larger, and then the CQI error for causing mapping to obtain is larger.In order to efficiently solve this technical problem, this implementation
Example obtains the reference measure point and time slot of CPICH Common Pilot Channel by changing user equipment, shortens the slot length of measurement, therefore
More accurate signal quality can be measured.
Computing module 42 is specifically used for that the signal matter of calculating is calculated according to the M signal quality that measurement module is got
Amount, and mapped to obtain the channel quality indicator (CQI) of CPICH Common Pilot Channel according to the signal quality of calculating.
The computing module 42 of the present embodiment can pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal matter of calculating is calculated
Amount, wherein Q is the signal quality calculated, Q1、Q2…QMFor M signal quality, p1、p2…pMFor the coefficient and p more than or equal to 01
+p2+…+pM=1.
It should be noted that p1、p2…pMBetween can be essentially equal, that is, take Q1、Q2…QMAverage value as calculate
Signal quality Q it is of course also possible to which taking M-1 therein is 0, or takes the p closest to initial timeMWeight it is maximum, or
Some Q that can most reflect the signal quality of CPICH Common Pilot Channel is taken according to the actual situationxPXWeight be 1/2 to be calculated
Deng, those skilled in the art understand in the range of, be not construed as limiting.
Preferably, the signal quality that the present embodiment measurement module 41 acquires is chip energy orthogonal interference ratio, accordingly
The computing module 42 of ground the present embodiment is specifically used for passing through Ec/Nt=p1*Ec1/Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMIt calculates
The chip energy orthogonal interference ratio calculated, and CQI is obtained by CQI=Ec/Nt+ γ mapping calculation, wherein EcMFor M
A chip energy, NtMFor m-th orthogonal interference, Ec1/Nt1、Ec2/Nt2…EcM/NtMRespectively the 1st, 2 ... M chip energies
Orthogonal interference ratio, Ec/Nt are the chip energy orthogonal interference ratio calculated, and γ is mapping regulating constant.γ can be set to fixed increasing
Benefit value, or be calculated by γ=10lg16+MPO+A, wherein MPO is that network side issues biasing constant, and A is Fixed constant,
10lg16 is the spreading gain of high-speed physical downlink shared channel (HS-PDSCH).
For sending module 43 specifically when initial time arrives, the CQI that computing module is calculated is reported to base station.
The present embodiment improves the standard of measuring signal quality by the reference measure point and time slot of change measuring signal quality
True rate thereby reduces the error for feeding back to the CQI of base station.
The present embodiment adjusts the time span of acquisition by adjusting obtaining the time of measuring point of signal quality etc., one
Determine the accuracy rate that signal quality is effectively improved in degree.
In addition, the measurement module 41 of the present embodiment specifically can be also used for the shared letter of measurement time of reception high-speed physical downlink
First signal quality in road and the second signal quality of CPICH Common Pilot Channel, and measurement reporting channel quality instruction starting when
The third signal quality of CPICH Common Pilot Channel before quarter in a cycle.
Correspondingly, computing module 42 specifically can be also used for calculating first signal quality and the second signal quality
Between difference, and the signal quality of calculating is calculated by the difference and the third signal quality, then to described
The signal quality of calculating carries out mapping processing to obtain channel quality indicator (CQI).
As previously described, because the CQI that prior art user equipment is reported to base station is substantially to report to base station according to public
The signal quality instruction for the reflection high-speed physical downlink shared channel (HS-PDSCH) signal quality that the signal quality of pilot channel maps, also
I other words the signal quality for first measuring CPICH Common Pilot Channel carries out mapping processing again and obtains CQI, what this process caused to report
CQI there is a certain error and when ductility.The present embodiment measurement module 41 directly measures the of high-speed physical downlink shared channel (HS-PDSCH)
One signal quality simultaneously by computing module 42 calculate its difference, can reduce to a certain extent the CQI of feedback error and when
Ductility.
Specifically, computing module 42 can pass through Δ=b1-b2Calculating difference passes through Q=Δ+b3Calculating is calculated
Signal quality Q, wherein b1For the first signal quality, b2For second signal quality, b3For third signal quality, Δ is difference,
That is Δ=b1-b2+b3。
In a preferred embodiment, measurement module 41 measures a cycle before the initial time that reporting channel quality indicates
During the third signal quality of interior CPICH Common Pilot Channel, the present embodiment can be using the relevant embodiment description in front
Mode survey calculation obtains third signal quality.Specifically, being surveyed before the initial time of reporting channel quality instruction arrives
It measures the available CPICH Common Pilot Channel of module 41 and plays the signal in continuous N 1/N time slot in 1/N time slot before initial time
Quality, wherein N is the natural number greater than 1, and M is the natural number more than or equal to 1；Computing module 42 is carried out according to M signal quality
Weighted calculation obtains third signal quality.Wherein, concrete implementation process also please refers to the associated description of preceding embodiment,
In the range of those skilled in the art understands, do not repeat.
It is not difficult to find out that the present embodiment passes through b1-b2Available CPICH Common Pilot Channel and Physical Downlink Shared Channel due to when
Channel quality brought by ductility indicates difference DELTA, then adds on the basis of the instruction of the third channel quality of CPICH Common Pilot Channel
Difference DELTA, ductility bring error when can effectively reduce；Meanwhile the CQI that the present embodiment is handled more can be relatively truer
The quality of ground reflection Physical Downlink Shared Channel.The present embodiment makes base station according to CQI and comprehensive other information (such as physics
Resource etc.) determine that base station sends the modulation system and code rate etc. of downlink data, it improves between base station and user equipment
Channel quality, and improve the downlink data throughput of base station.
Referring to Fig. 5, being the module frame chart of another embodiment of the application user equipment, the user equipment of the present embodiment includes
But it is not limited to processor 51, receiver 52, transmitter 53, random access memory 54, read-only memory 55 and bus 56.Place
Reason device 51 is respectively coupled to receiver 52, transmitter 53, random access memory 54 and read-only memory 55 by bus 56.
In the present embodiment, processor 51 is specifically used for before the initial time that reporting channel quality indicates arrives, and obtains
It takes CPICH Common Pilot Channel to play the signal quality in continuous N 1/N time slot in 1/N time slot before initial time, is believed according to M
The signal quality that number Mass Calculation is calculated, and mapped to obtain the channel matter of CPICH Common Pilot Channel according to the signal quality of calculating
Amount instruction CQI, wherein N is the natural number greater than 1, and M is the natural number more than or equal to 1.
The present embodiment processor 51 can pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal quality of calculating is calculated,
Wherein, Q is the signal quality calculated, Q1、Q2…QMFor M signal quality, p1、p2…pMFor the coefficient and p more than or equal to 01+p2
+…+pM=1.
Correspondingly, transmitter 53 is used to the CQI that the processing of processor 51 obtains being reported to base station.
It should be noted that the signal quality that processor 51 acquires can be chip energy orthogonal interference ratio, processing
Device 51 can pass through Ec/Nt=p1*Ec1/Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMThe chip energy that calculating is calculated is orthogonal
Ratio is interfered, and CQI is obtained by CQI=Ec/Nt+ γ mapping calculation, wherein EcMFor m-th chip energy, NtMJust for m-th
Hand over interference, Ec1/Nt1、Ec2/Nt2…EcM/NtMRespectively the 1st, 2 ... M chip energy orthogonal interference ratios, Ec/Nt are to calculate
Chip energy orthogonal interference ratio, γ be mapping regulating constant.The mapping regulating constant of the present embodiment can be fixed gain
Value, can also be calculated by γ=10lg16+MPO+A, wherein MPO is that network side issues biasing constant, and A is fixed normal
Amount, 10lg16 are the spreading gain of high-speed physical downlink shared channel (HS-PDSCH).
The present embodiment improves the standard of measuring signal quality by the reference measure point and time slot of change measuring signal quality
True rate thereby reduces and is reported to the error that the CQI of base station shows.
It should be noted that the processor 51 of the present embodiment specifically can be also used for measurement time of reception high-speed physical downlink
First signal quality of shared channel and the second signal quality of CPICH Common Pilot Channel, and measurement reporting channel quality instruction
The third signal quality of CPICH Common Pilot Channel before initial time in a cycle；Then, processor 51 calculates described first
Difference between signal quality and the second signal quality, and be calculated by the difference and the third signal quality
The signal quality of calculating then carries out mapping processing to the signal quality of the calculating to obtain channel quality indicator (CQI).
As previously described, because the CQI that prior art user equipment is reported to base station is substantially to report to base station according to public
The signal quality instruction for the reflection high-speed physical downlink shared channel (HS-PDSCH) signal quality that the signal quality of pilot channel maps, also
I other words the signal quality for first measuring CPICH Common Pilot Channel carries out mapping processing again and obtains CQI, what this process caused to report
CQI there is a certain error and when ductility.The present embodiment processor 51 directly measures the first of high-speed physical downlink shared channel (HS-PDSCH)
Signal quality simultaneously calculates its difference, can reduce to a certain extent the CQI reported error and when ductility.
Specifically, processor 51 can pass through Δ=b1-b2Calculating difference, and pass through Q=Δ+b3Calculating is calculated
Signal quality Q, wherein b1For the first signal quality, b2For second signal quality, b3For third signal quality, Δ is difference,
That is Δ=b1-b2+b3。
In a preferred embodiment, before the initial time of the measurement of processor 51 reporting channel quality instruction in a cycle
CPICH Common Pilot Channel third signal quality during, the present embodiment can using front related embodiment description by the way of
Survey calculation obtains third signal quality.For example, before the initial time of reporting channel quality instruction arrives, processor
51 available CPICH Common Pilot Channels play the signal quality in continuous N 1/N time slot in 1/N time slot before initial time,
Wherein, N is the natural number greater than 1, and M is the natural number more than or equal to 1；Processor 51 is weighted meter according to M signal quality
Calculation obtains third signal quality.Wherein, concrete implementation process also please refers to the associated description of preceding embodiment, in this technology
In the range of field personnel understand, do not repeat.
It is not difficult to find out that the present embodiment passes through b1-b2Available CPICH Common Pilot Channel and Physical Downlink Shared Channel due to when
Channel quality brought by ductility indicates difference DELTA, then adds on the basis of the instruction of the third channel quality of CPICH Common Pilot Channel
Difference DELTA, ductility bring error when can effectively reduce；Meanwhile the channel quality to be reported that the present embodiment is handled
Instruction can more compare the quality for being truly reflected Physical Downlink Shared Channel.The present embodiment makes base station according to CQI and synthesis
Other information (such as physical resource etc.) improves base modulation system and the code rate etc. that determine base station transmission downlink data
The channel quality stood between user equipment, and improve the downlink data throughput of base station.
Referring to Fig. 6, be the module frame chart of one embodiment of base station for the application, the present embodiment base station includes but unlimited
In receiving module 61, processing module 62 and transmitting module 63.
Receiving module 61 is used to receive the CQI of user equipment to report, and CQI is what user equipment was indicated in reporting channel quality
Before initial time arrives, user equipment obtains 1/N time slot of the CPICH Common Pilot Channel before initial time and plays continuous N 1/
Signal quality in N time slot, wherein N is the natural number greater than 1, and M is the natural number more than or equal to 1, then according to M signal
The signal quality that Mass Calculation is calculated, and obtained by carrying out mapping processing according to the signal quality of calculating.
Processing module 62 is used to be adjusted under the transport block size for sending data, physics according to the received CQI of receiving module 61
The shared channel number of row, modulation system and/or reference power adjusted value.
Transport block size, Physical Downlink Shared Channel number, tune of the transmitting module 63 for being adjusted according to processing module 62
Mode processed and/or reference power adjusted value send data.
The application effectively improves the downlink data throughput of base station.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the module or
The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units
Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute
Display or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit
Indirect coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the application
The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk
Etc. the various media that can store program code.
Above is only an example of the present application, it is not intended to limit the scope of the patents of the application, it is all to utilize this Shen
Please equivalent structure or equivalent flow shift made by specification and accompanying drawing content, be applied directly or indirectly in other relevant skills
Art field similarly includes in the scope of patent protection of the application.
Claims (6)
1. a kind of feedback method of channel quality instruction characterized by comprising
Before the initial time of reporting channel quality instruction arrives, user equipment obtains CPICH Common Pilot Channel in the starting
1/N time slot before quarter plays the signal quality in continuous N 1/N time slot, wherein N is the natural number greater than 1, M for greater than etc.
In 1 natural number；
The signal quality of calculating is calculated according to the M signal qualities, and is mapped according to the signal quality of the calculating
To the channel quality indicator (CQI) of CPICH Common Pilot Channel；
When the initial time arrives, the CQI is reported to base station.
2. feedback method according to claim 1, which is characterized in that described to be calculated according to the M signal qualities
The step of signal quality of calculating, specifically includes:
Pass through Q=p1*Q1+p2*Q2+…+pM*QMThe signal quality of the calculating is calculated, wherein Q is the letter of the calculating
Number quality, Q1、Q2…QMFor the M signal qualities, p1、p2…pMFor the coefficient and p more than or equal to 01+p2+…+pM=1.
3. feedback method according to claim 2, which is characterized in that the signal quality is chip energy orthogonal interference
Than:
It is described to pass through Q=p1*Q1+p2*Q2+…+pM*QMThe step of signal quality of the calculating is calculated specifically includes:
Pass through Ec/Nt=p1*Ec1/Nt1+p2*Ec2/Nt2+…+pM*EcM/NtMThe chip energy orthogonal interference of calculating is calculated
Than, wherein EcMFor m-th chip energy, NtMFor m-th orthogonal interference, Ec1/Nt1、Ec2/Nt2…EcM/NtMRespectively the 1st,
2 ... M chip energy orthogonal interference ratios, Ec/Nt are the chip energy orthogonal interference ratio calculated；
It is specific that the signal quality according to the calculating maps the step of obtaining the channel quality indicator (CQI) of CPICH Common Pilot Channel
Include:
Channel quality indicator (CQI) is obtained by CQI=Ec/Nt+ γ mapping calculation, wherein γ is mapping regulating constant.
4. a kind of user equipment characterized by comprising
Measurement module, for before the initial time that reporting channel quality indicates arrives, obtaining CPICH Common Pilot Channel described
1/N time slot before initial time plays the signal quality in continuous N 1/N time slot, wherein N is the natural number greater than 1, and M is
Natural number more than or equal to 1；
The signal matter of calculating is calculated in computing module, the M signal qualities for being got according to the measurement module
Amount, and mapped to obtain the channel quality indicator (CQI) of CPICH Common Pilot Channel according to the signal quality of the calculating；
Sending module, for when the initial time arrives, the CQI that the computing module is calculated to be reported to base
It stands.
5. user equipment according to claim 4, which is characterized in that the computing module is specifically used for passing through Q=p1*Q1+
p2*Q2+…+pM*QMThe signal quality of the calculating is calculated, wherein Q is the signal quality of the calculating, Q1、Q2…QMFor
The M signal qualities, p1、p2…pMFor the coefficient and p more than or equal to 01+p2+…+pM=1.
6. user equipment according to claim 5, which is characterized in that the signal matter that the measurement module acquires
Amount is chip energy orthogonal interference ratio, and the computing module is specifically used for passing through Ec/Nt=p1*Ec1/Nt1+p2*Ec2/Nt2+…+
pM*EcM/NtMThe chip energy orthogonal interference ratio of calculating is calculated, and channel is obtained by CQI=Ec/Nt+ γ mapping calculation
Quality indicator (CQI), wherein EcMFor m-th chip energy, NtMFor m-th orthogonal interference, Ec1/Nt1、Ec2/Nt2…EcM/NtM
Respectively the 1st, 2 ... M chip energy orthogonal interference ratios, Ec/Nt are the chip energy orthogonal interference ratio calculated, and γ is mapping
Regulating constant.
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