CN104038998B - Method for carrying out transmission of control signals using efficient multiplexing - Google Patents
Method for carrying out transmission of control signals using efficient multiplexing Download PDFInfo
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- CN104038998B CN104038998B CN201410224802.0A CN201410224802A CN104038998B CN 104038998 B CN104038998 B CN 104038998B CN 201410224802 A CN201410224802 A CN 201410224802A CN 104038998 B CN104038998 B CN 104038998B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
- H04W52/58—Format of the TPC bits
Abstract
The invention discloses a kind of method for carrying out transmission of control signals using efficient multiplexing.The present invention includes the step of being multiplexed multiple 1 (1 bit) control signals in prespecified temporal frequency domain with CDMA method (CDMA) and transmitted these demultiplex control signals, and plurality of 1 control signal includes multiple 1 control signal for specific transmission end.Therefore, reliability during 1 control signal of transmission can be improved.
Description
The application be on April 2nd, 2009 international filing date submitted be on October 2nd, 2007 Application No.
200780036950.8 (PCT/KR2007/004825's), it is entitled " to be used to transmit control letter using efficient multiplexing
Number method " patent application divisional application.
Technical field
The present invention relates to it is a kind of be used in multi-carrier mobile communication system transmission of control signals method, more particularly to one
The transmission method of kind control signal.Although the scope of application of the present invention is very big, it is particularly suitable for use in uplink/downlink transmissions
In by being effectively multiplexed multiple 1 control signal and reliably transmission of control signals.
Background technology
In general, in multi-carrier mobile communication system, base station performs downlink packet and transmitted to belonging to one
Cell or the multiple user equipmenies of each (user equipments, UE) for belonging to multiple cells.Meanwhile multiple users set
It is standby to may be present in a cell.Due to using a kind of prespecified form, each user equipment can not know that packet will
How oneself is transferred to, therefore when base station communicating downlink packet is to special user equipment, the base station should transmit
Than necessary information as described below：By the user equipment ID for receiving corresponding packet, for carry the packet when it is m-
Frequency domain, the data transmission format comprising encoding rate, modulator approach and similar information, HARQ relevant informations and downlink use
To transmit the similar information of each downlink packet.
On the contrary, in order to allow user equipment should to transmit such as following institute in transmission packet, base station in the uplink
The necessary information stated：It is allowed to the ID of the user equipment of transmission packet, allows the user equipment to transmit the up of the packet
Link Time-frequency domain, the data transmission format comprising encoding rate, modulator approach and similar information, HARQ relevant informations and
Up-link is used for transmitting the similar information of each uplink data packet.
In transfer uplink data bag, base station, which should transmit, receives successfully ack/nack
(acknowledgement/non-acknowledgement, ACK/NACK) information has been set by user in each in up-link
It is standby to transmit to mutually be in the data of user equipment.On the other hand, when downlink packet is transmitted, each user equipment passes
The information of the defeated reception success or failure on each packet for passing through ACK/NACK information transfers in uplink base station.
In order to maintain the up-link of each user equipment transmission/receiving power in proper level, therefore base station is under
Transmission power control data is answered in line link to each user equipment.
In foregoing illustrated control signal, ack/nack signal, power control signal or similar signal are mainly only
1 need to be used can indicate corresponding information, thus be referred to alternatively as " 1 control signal ".
In order to effectively operate and management system, it is necessary to Uplink/Downlink control signal is multiplexed, to state before carrying
Bright control information, particularly, can effectively 1 control signal of multiplexed data packets and other letters in time-frequency resources
Number.
Multiplexing method used in as in multi-carrier mobile communication system, time division multiple acess (time division
Multiple access, TDMA) method is by being divided multiple signals in time-domain to be multiplexed these signals；Frequency division
Multiple access (frequency division multiple access, FDMA) method is by entering multiple signals in frequency domain
Row is split to be multiplexed these signals；CDMA (code division multiple access, CDMA) method is using just
Hand over code or quasiorthogonal code (or other available similar fashions), the signal being multiplexed on specified time-frequency domain.
However, when using only TDMA and/or FDMA methods to be multiplexed 1 control signal, because the biography of each control signal
Defeated power is different greatly, and the influence for adjacent cell may differ in time-domain and/or frequency domain.
For example, particularly when random cell is multiplexed to transmit different user in single TTI with TDMA or FDMA methods
During the ack/nack signal of equipment, if the transimission power of the ack/nack signal of each user equipment is different greatly, this is corresponding
Cell puts on the interference volume on adjacent cell may be big different in time-domain or frequency domain.Moreover, such a situation may
The downlink packet scheduling or T/F-energy source distribution effectively performed in cellular environment is had undesirable effect.
In addition, ought such as transmission end ack/nack signal etc control signal in descending/uplink channel transmission
During failure, the problem of having reliability when transmitting the corresponding signal.
The content of the invention
Technical problem
Technical scheme
Correspondingly, the present invention provides a kind of method for being used for the transmission of control signals in multi-carrier mobile communication system, this
Method can greatly solve one or more problems caused by the limitation of related prior art and shortcoming.
It is an object of the invention to provide a kind of method can effectively transmit multiple control signal, pass through the method
Interference during control signal can be transmitted in a manner of efficiently performing multiplexing reduces to minimum, and then reliably transmits specific transmission
The control signal at end.
The present invention other the advantages of, purpose and a feature part will be described hereinafter, a part is common for this area
By hereafter becoming apparent or can be obtained from the practice of the present invention for technical staff.Pass through write specification
Object of the present invention and other advantages are will be seen that and obtain with the structure specifically noted by its claim and accompanying drawing.
In order to realize these purposes with other advantages and according to the purpose of the present invention, as embodied and summarizing herein
Description, according to a kind of method of transmission of control signals of the present invention, this method is by CDMA (CDMA) prespecified
Time-frequency domain in multiple 1 bits of multiplexing control signal；The control signal of the multiplexing is repeated in different frequency domain；
And the control signal of the transmission repetition.
To reach foregoing and further advantage and according to the purpose of the present invention, say such as the specific embodiment in specification and extensively
Bright, according to a kind of method of transmission of control signals of the present invention, this method includes is advised with CDMA (CDMA) multiplexing in advance
Multiple 1 control signal in fixed time-frequency domain；And the control signal of the transmission multiplexing, wherein the multiple 1 control
Signal processed includes multiple 1 control signal for specific transmission end.
Preferred versions are that wherein the prespecified time-frequency domain is included in the when m- frequency in 1 OFDM symbol band
Rate domain.
Preferred versions are, will when including single OFDM symbol band for transmitting the time-domain of the control signal
Mode that the control signal of the multiplexing in the single OFDM symbol band is repeated in the different frequency domain performs
Above-mentioned repetition.
Preferred versions are, wherein when including multiple OFDM symbol bands for transmitting the time-domain of the control signal,
So that the demultiplex control signal in the OFDM symbol band different from each other is repeated to the side in the different frequency domain
Formula performs above-mentioned repetition.
Preferred versions are, in multiplexing, the multiple 1 control signal is by be used to be multiplexed the 1 control letter
Number each orthogonal or quasiorthogonal code and be distinguished out.
Preferred versions are that the multiple 1 control signal is distinguished out simultaneously by different quadrature phase components respectively
Modulated；And wherein multiplexing when, the multiple 1 control signal by the different orthogonal phase component for the modulation and
Further discriminated between out.
Preferred versions are that the prespecified time-frequency domain includes multiple time-frequency domains；Wherein walked in multiplexing
In rapid, additional multiplexing can be realized by least one in time division multiple acess (TDMA) and frequency division multiple access (FDMA), and wherein
Multiple 1 control signal for the specific transmission end are answered by being dispersed in the multiple time-frequency domain
.
Preferred versions are, for different transmission end 1 control signal respectively by the CDMA the multiple
It is re-used in time-frequency domain.In this case, multiple 1 control signal for the specific transmission end pass through different
Orthogonal or quasiorthogonal code and be re-used.
Moreover, described orthogonal or quasiorthogonal code includes code sequence, its length corresponds to the big of the multiple time-frequency domain
It is small.
In addition, 1 control signal may include ack/nack signal or power control signal.Moreover, 1 control signal
Up-link or downlink can be transmitted at.
It is understood that the foregoing overview description of the present invention and the following detailed description are all exemplary and illustrative
, and it is intended that the required present invention is further explained.
According to the specific embodiment of the present invention, when being multiplexed multiple 1 control signal, mainly CDMA methods are used.In addition, can
Respectively by different orthogonal or quasiorthogonal codes to transmit the multiple control signal of special user equipment.Therefore, can promote corresponding
Control signal transmission reliability.
Moreover, and distribution mode can be passed through by realizing FDMA and/or TDMA methods simultaneously to transmit 1 control signal
To transmit the multiple control signal of the special user equipment on each time-frequency domain, to increase at coherent (coherent)
Frequency range and/or the multiplexed signals amount in the coherent time.
In addition, in the case where transmitting 1 control signal by multiple time-frequency domains, used by explicitly pointing out
Orthogonal code (orthogonal code according to whole time-frequency domain size rather than respective time-frequency domain size for transmission), energy
Enough increases can simultaneous transmission control signal amount.
In addition, in the case of multiple OFDM symbols are used to 1 control signal of transmission, by different frequency domain in difference
1 control signal modulated with CDMA is transmitted on OFDM symbol region, can be in the case where having resource efficiency and diversity gain feature effectively
Perform transmission.Meanwhile also in each OFDM symbol region power distribution can be made more flexible.
Brief description of the drawings
Accompanying drawing shows embodiments of the present invention, and it is used to further understanding of the invention, and together with saying
Bright book is used for the principle for explaining the present invention together.
In the accompanying drawings：
Fig. 1 is the multiplexing method that ack/nack signal is transmitted by CDMA technology of the specific embodiment according to the present invention
Illustrate schematic diagram；
Fig. 2 is that being realized by CDMA and FDMA technologies for the specific embodiment according to the present invention is multiplexed to transmit end to end
The explanation schematic diagram of the method for ack/nack signal；
Fig. 3 is that being realized by CDMA, TDMA and FDMA technology for the specific embodiment according to the present invention is multiplexed end to end
To transmit the explanation schematic diagram of ack/nack signal；
Fig. 4 is that being realized by CDMA and FDMA technologies for the specific embodiment according to the present invention is multiplexed to transmit end to end
The explanation schematic diagram of ack/nack signal, wherein being transmitted by specific transmission end in multiple ack/nack signals is multiple
Ack/nack signal is transmitted by multiple frequency domains；
Fig. 5 is the multiplexing by CDMA, TDMA and FDMA technology realization to end end of the specific embodiment according to the present invention
To transmit the explanation schematic diagram of ack/nack signal, being transmitted by specific transmission end in plurality of ack/nack signal is more
Individual ack/nack signal is transmitted by multiple frequency domains；
Fig. 6 is 1 OFDM symbol band of use (symbol zone) according to the specific embodiment of the present invention to transmit ACK/
The explanation schematic diagram of NACK signal；
Fig. 7 is use at least two OFDM symbol band according to the specific embodiment of the present invention to transmit ack/nack signal
Explanation schematic diagram；
Fig. 8 is use at least two OFDM symbol band according to the preferred embodiment of the present invention to transmit ACK/NACK
The explanation schematic diagram of signal；And
Fig. 9 is to illustrate that the specific embodiment according to Fig. 8 is transmitted to increase showing for the principle of the flexibility of power distribution
It is intended to.
Embodiment
Here the careful preferred embodiment with reference to the present invention, the example are shown in accompanying drawing.
Generally, base station transmission ack/nack signal, each user equipment in the signal designation cell are transmitted
Packet be to be successfully received or reception failure；Or control signal, it plays the part of and respective user equipment in the downlink
The similar role of the ack/nack signal.So, when multiple user equipmenies can in single TTI transfer uplink data bag
When, base station can also transmit ack/nack signal to these multiple user equipmenies in single TTI simultaneously.
In addition, base station is multiplexed multiple power control signals to control multiple user equipmenies in the single TTI in cell
The transimission power of uplink data, and the multiplexed signals is then transmitted to each user equipment.
Therefore, the specific embodiment according to the present invention, in order to be effectively multiplexed and transmitted multiple 1 control signal,
This embodiment offers a kind of multiplexing method to pass through CDMA in the part time-frequency domain of transmission belt in multi-carrier systems
Method transmits multiple 1 control signal.Moreover, it will be illustrated with reference to specific embodiment.
Meanwhile the explanation of embodiments of the invention relates to the situation that 1 control signal is ack/nack signal.According to
In method according to the transmission of control signals of embodiments of the invention, 1 control signal is not necessarily intended to be ack/nack signal.And
It is apparent that for a person skilled in the art, the present invention includes in the case where multiple signals are the form being transmitted in 1TTI
There is 1 random control signal.
Fig. 1 is the multiplexing method that ack/nack signal is transmitted by CDMA technology of the specific embodiment according to the present invention
Illustrate schematic diagram.
Reference picture 1, according to embodiments of the invention, base station preserves special time-frequency domain in 1 TTI to be used as biography
Defeated ACK/NACK is used.In addition, the ack/nack signal of different user devices be by add orthogonal or quasiorthogonal code to when m- frequency
It is distinguish between on rate domain.
In the case, " orthogonal code " or " quasiorthogonal code " is used to the multiplexed signals in CDMA methods, and can be used as and refer to
Show code using indicate correlation be zero or value be less than specified threshold situation.
According to the preferred embodiment of the present invention, when the tune by such as QPSK methods using the orthogonal component of phase
In the case that technology processed is to perform transmission, multiple ack/nack signals can additionally be distinguished by different quadrature phase components.
In the embodiment shown in fig. 1, when ack/nack signal is by including 12 subcarriers in single TTI
Across the time-frequency domain of 6 OFDM symbols when being transmitted, orthogonal code that chip length is 72 (=6x12) can be used to pass
Defeated ack/nack signal.Therefore, can 72 different orthogonal signalling of simultaneous transmission.However, it is many can be transmitted simultaneously it is orthogonal
Signal changes such as the type of used orthogonal/quasiorthogonal code.
In the case where embodiment as shown in Figure 1 uses QPSK as modulator approach, two quadrature phases can be used.Cause
This, can transmit the different orthogonal signal of the doubling dose of 72 orthogonal signalling altogether.
Meanwhile the ack/nack signal of sole user's equipment can pass through the list in orthogonal signalling caused by manner described above
One orthogonal signalling and be transmitted.However, the specific embodiment of the present invention proposes to be loaded beyond 1 in single ack/nack signal
Information or in the case of sole user's equipment transmits multiple packets in single TTI, by the ACK/ of sole user's equipment
NACK signal is set to by multiple orthogonal signalling to be transmitted.
Such as foregoing illustrated specific embodiment of the invention, it is multiplexed and is transmitted by CDMA methods in downlink
Ack/nack signal has the advantage that：It is by the ack/nack signal on single TTI time-frequency domain in downlink
Caused a large amount of interference can be maintained relatively equal.
Especially, it is multiplexed in random cell in single TTI with TDMA or FDMA methods and transmits different user devices
Ack/nack signal in the case of, be previously mentioned as indicated above, if individual user equipments ack/nack signal transmission work(
Difference is big each other for rate, then these respective cells be added on the interference volume on adjacent cell may very much not in time-domain or frequency domain
Together.Moreover, such a situation may to effectively perform cellular environment downlink packet scheduling or other time-frequency-
Energy distribution has undesirable effect.However, being multiplexed ack/nack signal in the specific embodiment such as the present invention with CDMA methods
In the case of, even if when different ack/nack signal transimission powers are allocated to different user devices, all user equipmenies
Ack/nack signal is added together in single TTI same time-frequency domain, and is then transmitted.Therefore, transimission power
Change on time-frequency domain can be minimized.
As the present invention specific embodiment, multiple ack/nack signals (these signals transmitted by sole user's equipment or
It is transmitted to transmit sole user's device data) it is in the case of being transmitted by multiple orthogonal signalling, biography can be improved
Defeated ack/nack signal to corresponding user equipment reliability.
Passed in addition, the downlink transmission principle of the ack/nack signal of preceding description can be applied in the same manner in up-link
On defeated.
Meanwhile when being multiplexed ack/nack signal with CDMA methods, it is previously mentioned, is multiplexed with CDMA methods as indicated above
Orthogonality between different ack/nack signals, only when downlink radio channel response characteristic is carrying ACK/NACK letters
Number time-frequency domain on when not being changed too many, its orthogonality can be just maintained.Therefore, such as connect in no use
Under the special receiving algorithm of the channel equalizer of receiving end etc, remain to obtain satisfied receptivity.Preferred versions are, when
Realize in m- frequency domain and ack/nack signal be multiplexed with CDMA methods, in the time-frequency domain radio channel response not by
Change too much, i.e., within coherent time and coherent frequency range.
According to the detailed specific embodiment of the present invention, FDMA or TDMA can be used to be multiplexed method to realize that transmission is answered with CDMA methods
With ack/nack signal, to reduce the time-frequency domain for being multiplexed ack/nack signal with CDMA methods in coherent scope, wherein
Radio channel response feature is not changed too much in the coherent scope.It will be described below it.
Fig. 2 is that being realized by CDMA and FDMA technologies for the specific embodiment according to the present invention is multiplexed to transmit end to end
The explanation schematic diagram of the method for ack/nack signal.
With reference to figure 2, passed in the time-frequency domain that different ack/nack signals can be separated from each other on two frequency axis
It is defeated.Moreover, different ack/nack signals can be re-used in each time-frequency domain with CDMA methods.In the case, foundation
The specific embodiment of the present invention, when ack/nack signal is transmitted by two frequency domains, can be observed each frequency domain
Width is to be configured to 6 sub-carrier bins, and its width is less than 12 sub-carrier bins.
Especially, in the embodiment shown in Figure 2, because each of two time-frequency domains all includes 6 OFDM
Symbol and 12 subcarriers, therefore CDMA methods can be used to transmit 36 (=6x6) orthogonal signalling.Due to two time-frequency domains
It is to be used in single TTI, therefore 72 (=36x2) orthogonal signalling can be transmitted.
In the case of using QPSK modulation, believed due to two quadrature phases can be used with additionally distinguishing ACK/NACK
Number, therefore the different orthogonal signalling of the doubling dose equivalent to 72 orthogonal signalling can be transmitted.
Fig. 3 is that being realized by CDMA, TDMA and FDMA technology for the specific embodiment according to the present invention is multiplexed end to end
To transmit the explanation schematic diagram of ack/nack signal.
Especially, Fig. 3 shows embodiment, and the example is by being multiplexed ACK/ with CDMA, FDMA and TDMA method to realize simultaneously
NACK signal.
Reference picture 3, different ack/nack signals can be transmitted on 4 less time-frequency domains of channel variation.This
Outside, CDMA methods can be used to be re-used in each time-frequency domain for different ack/nack signals.
Especially, in the embodiment shown in fig. 3, because each time-frequency domain includes three OFDM symbols and six
Subcarrier, therefore 18 (=3x6) ack/nack signals can be transmitted in each time-frequency domain with CDMA methods.Due to four
Time-frequency domain is used in single TTI, therefore can also transmit 72 (=18x4) ack/nack signals.Due to two just
Hand over phase to can be used as QPSK transmission, therefore the ACK/NACK letters of the doubling dose of the ack/nack signal different equivalent to this can be transmitted
Number.
In the foregoing ack/nack signal multiplexing method shown in Fig. 2 or Fig. 3, for being passed in each time-frequency domain
Defeated different ack/nack signal, this method is than the method shown in Fig. 1 advantageously.In method shown in Fig. 1, every ACK/
NACK signal can not be to change to be transmitted in too big time-frequency domain with radio channel response feature；However, making
In the case of specifying the radio channel quality of user equipment bad in the time-frequency domain of loading ACK/NACK signal, phase
Answering the ACK/NACK receptivities of user equipment can greatly decline.
Therefore, specific embodiment of the invention proposes that ack/nack signal of the specific user equipment in single TTI can
It is spanned and is transmitted on the time-frequency domain away from multiple T/F axles.In addition, the specific embodiment of the present invention also proposes
For obtain receiving terminal ack/nack signal receive T/F diversity gain method, this method be by with
CDMA methods are multiplexed the ack/nack signal of different user devices in each time-frequency domain.
Fig. 4 is the method explanation figure for transmitting ack/nack signal, and according to the specific embodiment of the present invention, this method passes through same
When multiplexing ack/nack signal realized with CDMA and FDMA methods；Wherein passed in multiple ack/nack signals by specific transmission end
Defeated multiple ack/nack signals are transmitted by multiple frequency domains.
Reference picture 4, receiving terminal can in a manner of ack/nack signal is transmitted in two different frequency domains by leap
Obtain frequency diversity gain.In the embodiment as shown in fig.4, ack/nack signal is spanned transmission in two T/Fs
Domain and different ack/nack signals is re-used in each time-frequency domain.
Especially, because each time-frequency domain includes six OFDM symbols and six subcarriers, therefore in per a period of time
With 36 (=6x6) ack/nack signals of CDMA methods reusable in m- frequency domain.Passed because two quadrature phases can be used as QPSK
It is defeated, therefore the ack/nack signal of the doubling dose of the ack/nack signal different equivalent to this can be transmitted.
Mention as indicated above, using orthogonal code (according to each time-frequency domain in each time-frequency domain
Size adjusts) to be multiplexed different ack/nack signals when, the special user equipment that is transmitted by different time-frequency domain
Ack/nack signal, can be answered by the identical orthogonal code in the orthogonal code for being used in each time-frequency domain
With.
However, embodiments of the invention propose the ACK/ for the special user equipment being transmitted by different time-frequency domain
NACK signal, it can be multiplexed by using the different orthogonal code in each time-frequency domain is used in.
Therefore, the ack/nack signal for special user equipment is used in mutually different in each time-frequency domain
Orthogonal code and when being re-used, can avoid receptivity because in during specific T TI specific ack/nack signal with by CDMA multiplexings
The certain orthogonal of other ack/nack signals, which is reduced, to be influenceed and is lowered.In addition, the method is may extend away to cause specific user to set
Standby ack/nack signal, in the case that the ack/nack signal is transmitted by least three time-frequency domains,
Also the different orthogonal code that may be used in different time-frequency domain transmits the ack/nack signal of the special user equipment.
As shown in figure 4, when ack/nack signal is transmitted by multiple time-frequency domains, preferable tool of the invention
Body embodiment propose can the more ack/nack signals of simultaneous transmission method；When the method is using being specifically designated corresponding whole
The orthogonal code of m- frequency domain size, rather than the orthogonal code of corresponding each time-frequency domain size is specifically designated, then correspondingly
Transmit multiple ack/nack signals.
Especially, in the embodiment shown in fig. 4, by obtaining the orthogonal code of chip length 72, (6x12, foundation belong to two
6 OFDM symbols and 12 subcarriers of individual time-frequency domain, two time-frequency domains are set for carrying specific user
Standby multiple ack/nack signals) rather than chip length 36 (according to belong to single time-frequency domain 6 OFDM symbols and 6
Subcarrier), using different quadrature phases in the case of QPSK technical transmission signals, can be used with simultaneous transmission 144
Ack/nack signal.
In the case, due to the radio channel response of different time-frequency domain, difference is big and cause orthogonal to each other
The problem of orthogonality of intersymbol declines, can be different from each other to distribute by the correlative character intersected according to the part of orthogonal intersymbol
ACK/NACK transimission powers to overcome the problem.
Especially, if by by the low code division of the orthogonality in the foregoing orthogonal code specifically noted in groups to match corresponding
The transimission power of orthogonal code in group, then above-mentioned orthogonal sex chromosome mosaicism can be solved.
Fig. 5 is the method explanation figure for transmitting ack/nack signal, and according to the specific embodiment of the present invention, this method passes through same
When multiplexing ack/nack signal realized with CDMA, TDMA and FDMA method；Wherein by specific biography in multiple ack/nack signals
Multiple ack/nack signals of defeated end transmission will be transmitted by multiple frequency domains.
Fig. 5 shows that the ack/nack signal of wherein special user equipment crosses over transmission in two different time-frequency domains
Embodiment, in this way obtain T/F diversity gain.
Especially, user equipment 1 to N/4 ack/nack signal are the T/Fs by the upper left part positioned at Fig. 5
The time-frequency domain of domain and bottom right part positioned at Fig. 5 is transmitted, and user equipment N/4+1 to N/2 ack/nack signal is
Time-frequency domain by the lower-left part positioned at Fig. 5 and the time-frequency domain of the upper right part positioned at Fig. 5 are transmitted.
Especially, in the embodiment shown in fig. 5, the ack/nack signal of special user equipment crosses over transmission at two
In m- frequency domain.Then different ack/nack signals is multiplexed and passed in each time-frequency domain with CDMA methods
It is defeated.
In addition, 18 ack/nack signals can by each time-frequency domain across three OFDM symbols and six
The orthogonal code of the corresponding chip length 18 (=3x6) of subcarrier and be transmitted.Because two quadrature phases can be used in QPSK
Transmission, therefore 36 different ack/nack signals of the qdx equivalent to foregoing ack/nack signal can be transmitted altogether.
In the embodiment shown in fig. 5, it is distinguishable go out special user equipment pass through the ACK/ that different time-frequency domain transmits
NACK signal and other ack/nack signals using same orthogonal code.However, it can be multiplexed by using different orthogonal code every
Ack/nack signal in one time-frequency domain obtains diversity gain.
In addition, in the embodiment shown in fig. 5, according to whole time-frequency domain size rather than according to respective time-frequency
, can the more ack/nack signals of simultaneous transmission in the case that rate domain size is to be specifically designated orthogonal code.
Especially, it is 72 by the way that the chip length being made up of total of six OFDM symbol and 12 subcarriers is specifically designated
Therefore orthogonal code, rather than the orthogonal code that the chip length being made up of three symbols and six subcarriers is 18, can be passed simultaneously
Defeated more ack/nack signals.
In the specific embodiment shown in earlier figures 1 to 5, for example, 1 control signal, such as ack/nack signal, is to pass through
It is distributed in CDMA methods in 3 or 6 OFDM symbol bands to be transmitted.However, 1 control available for transmission such as ack/nack signal
The OFDM symbol band of signal processed, it can include at least one or more OFDM symbol.
In 1 control signal (ack/nack signal) transmission method according to foregoing specific embodiment of the invention, its
In be used in multiple time-frequency domains repeatedly transmitting ACK/NACK signal to ensure the method for transmission diversity gain, this method
Can be diversified according to numerous workable OFDM symbol bands.In the following description, explanation is used for passing according to numerous
Method of the OFDM symbol of defeated ack/nack signal can effectively transmit ack/nack signal.
Fig. 6 is 1 OFDM symbol band of use according to the specific embodiment of the present invention to transmit saying for ack/nack signal
Express intention.
In detail, Fig. 6 shows that four ack/nack signals are divided with invasin (spreading factor, SF) 4
Cloth is then multiplexed with CDMA methods in 1 OFDM symbol band and transmits these ack/nack signals.In figure 6, single frame represents
Single sub-carrier bin.In addition, AijRepresent the ack/nack signal being multiplexed with CDMA methods.In this embodiment, " i " is represented and divided
Scattered and multiplexed signals index, and " j " represents the index of the ack/nack signal group of the multiplexing.ACK/NACK group expressions are re-used
And the ack/nack signal set transmitted.In addition, multiple ACK/NACK groups can be according to the necessity and resource status of each system
And exist.For the convenience in clear explanation and explanation, Fig. 6 assumes to only exist single ACK/NACK groups.
Due to present embodiment assumes that using only single OFDM symbol to transmit ack/nack signal, therefore ACK/ can not be obtained
The diversity gain of NACK signal transmission on a timeline.
However, to obtain diversity gain on the frequency axis, the ACK/NACK being re-used on the frequency axis with CDMA methods
Signal can be repeatedly transmitted in different frequency domains.
Fig. 6 shows an example, wherein being repeated four in different frequency domains with the ack/nack signal of CDMA methods multiplexing
It is secondary.Here, four times of repetitions are to obtain the example of diversity.Signal repetition number according to system channel status and resource situation and
Change.In figure 6, each in the ack/nack signal being repeated four times all has identical index (i, j) to emphasize it for this
The repeating signal of signal.But each signal in the ack/nack signal being repeated four times can by different orthogonal codes or
Similar fashion and be re-used, therefore in this case, these repeating signals can be signal different from each other.But in order to
It is convenient to illustrate, the otherness of each repeating signal will be ignored in the text.
Fig. 6 processing carrys out the situation of ACK/NACK signal transmission using single OFDM symbol.Use the situation of single OFDM symbol
Only in order to illustrate embodiments of the invention.Moreover, the present invention is equally applicable for the situation using multiple OFDM symbols.
Relatively it is particularly, in the case where ACK/NACK is transmitted by several OFDM symbols, repeats to believe on a timeline
It is number same with repeating signal on the frequency axis be it is enforceable, to obtain extra diversity and transmission antenna diversity.
It will be described below using multiple OFDM symbols to transmit the situation of ack/nack signal.
In the case where increase OFDM symbol amount is to transmit ack/nack signal, when using single OFDM symbol to transmit
During ack/nack signal, ack/nack signal can be re-used in the increased OFDM symbol of cooperation institute.In the case, due to
Increase using to transmit the OFDM symbol of ack/nack signal, there can be more signal powers to be used for transmitting ACK/NACK letters
Number.Therefore, ack/nack signal can be transmitted to the wide region of cell.
Fig. 7 is the method explanation figure for transmitting ack/nack signal, and according to the specific embodiment of the present invention, this method is using extremely
Lack 2 OFDM symbol bands to transmit ack/nack signal.
Fig. 7 shows ack/nack signal transmission method, and the method processing is when the OFDM symbols for being used to transmit ack/nack signal
Number number when being increased to two, and ack/nack signal has and Fig. 6 identical invasins.Especially, Fig. 7 is shown as schemed
6 using single OFDM symbol to transmit ack/nack signal when structure, this structure can completely and repeated application is to the 2nd OFDM
Symbol.
When using aforementioned structure to transmit, when symbol quantity is increased, the ack/nack signal quantity that can transmit
Equivalent to the situation using single OFDM symbol.Because in the case of using only single OFDM symbol, when more multi-OFDM
When symbol is used for transmission and is only repeated ack/nack signal on the frequency axis, repeated by rolling up T/F
Number, more time-frequency resource are used for transmitting the ack/nack signal of identical quantity.
When performing transmission in this approach, more power can be allocated to ack/nack signal and transmit, but may provide
Source wastes.In the case where there is more OFDM symbols to be used for transmission ack/nack signal to reduce the wasting of resources, if logical
Crossing increases the number of iterations of each OFDM symbol on the frequency axis to perform transmission, then with using single OFDM symbol situation phase
Same time-frequency domain is occupied.Therefore, can be compared with efficent use of resources.
Fig. 8 is the method explanation figure for transmitting ack/nack signal, and according to the specific embodiment of the present invention, this method is using extremely
Lack 2 OFDM symbol bands to transmit ack/nack signal.
Fig. 8 shows embodiment, in this embodiment by increasing the repetition number of the ack/nack signal on frequency axis, resource quilt
It is more effective to utilize.In the example, ack/nack signal is re-used with CDMA methods, and is for transmitting ack/nack signal
OFDM symbol quantity is increased in the case of two.
When the OFDM symbol number for transmitting ack/nack signal is increased, compared with being repeated four times in Fig. 6, although
Ack/nack signal is repeated twice, but uses four times of time-frequency resources domains and the situation phase using single OFDM symbol
Together.
With shown in Fig. 7 by the identical ack/nack signal structure of application to whole OFDM symbol to perform the situation of transmission
Compare, it is assumed that using same time-frequency resource, Fig. 8 shows that the transmission of ack/nack signal may be two times.Therefore, resource
Can more effectively it be utilized.
Compared with Fig. 7, due to being increased using to transmit the time-frequency resources domain number of ack/nack signal, use
It may diminish to transmit the signal power of ack/nack signal.However, due to total ack/nack signal be spanned transmission when
M- frequency domain, the transimission power distribution of each symbol may be than transmitting ack/nack signal using only single OFDM symbol
Situation is more efficiently.
Reference picture 8, when using multiple OFDM symbol bands to transmit ack/nack signal, the specific implementation according to the present invention
Example, the feelings of the method for specific ack/nack signal are transmitted being taken through the different frequency domains in each OFDM symbol band
Under condition, power distribution can be realized to each ack/nack signal for greater flexibility；Thus pass through than use in each OFDM symbol
The method of ack/nack signal is transmitted in power distribution flexibility advantageously in different frequency domain in band.Below will be to this
Reference picture 9 describes in detail.
In the case that Fig. 9 illustrates with the specific embodiment transmission ack/nack signal in Fig. 8, power distribution flexibility is increased
The principle added.
In Fig. 9 (a) and (b), A1、A2、A3And A4The ack/nack signal group transmitted with CDMA methods is represented respectively.Especially
Ground, Fig. 9 (a) displays are by being repeated in same-sign band in different frequency wherein with the CDMA ack/nack signals being multiplexed
The form that mode in domain is transmitted.And the ACK/ that Fig. 9 (b) displays are wherein multiplexed according to the specific embodiment of the invention with CDMA
NACK signal is the form being transmitted by way of being repeated in different frequency domain in different OFDM symbol bands respectively.
In the case where ack/nack signal is transmitted in a manner of with Fig. 9 (a) identicals, distribute to respective OFDM symbols
The general power of band should be allocated by way of by power dispersion to two ack/nack signals.On the contrary, believe in ACK/NACK
Number it is in the case of being transmitted in a manner of with Fig. 9 (b) identicals that the general power distributed to respective OFDM symbols band can be by by work(
The mode that rate is dispersed to four ack/nack signals is allocated.Therefore, can hoisting power distribution flexibility and be higher than Fig. 9 (a)
Situation.
In other words, when it is plural for can be used to transmit the quantity of OFDM symbol band of ack/nack signal, such as this hair
Bright specific embodiment, in the case where ack/nack signal is transmitted by the different frequency domain in different OFDM symbols,
The flexibility of power distribution is increased with the power distribution of the ack/nack signal of each user of energy variation.
In the foregoing specific embodiment of the invention, for be multiplexed multiple ack/nack signals invasin, when m- frequency
Repetition number in rate domain and the OFDM symbol quantity for transmitting ack/nack signal, three are only to be used for correctly illustrating this hair
Bright embodiment, but other invasins, other repetition numbers and various OFDM symbol numbers all can be applied to this hair
It is bright.
In the embodiment of the present invention of foregoing illustrated foundation time-frequency resources, only point out to use single transmission day
Line and without using the situation of transmission antenna diversity.The present invention also may be selected to apply using two transmission antenna diversity methods or four transmission
Antenna diversity method.
Significantly for those skilled in the art, when being obtained for being transmitted from ack/nack signal of described above
The method of m- frequency diversity gain, this method can use simultaneously with FDMA methods or TDMA methods and CDMA methods, with according to the present invention's
Specific embodiment is multiplexed different ack/nack signals.
The multiplexing of preceding description and transmission ack/nack signal method are also applicable in multiplexing and communicating downlink
It is transferred in the method for multiple power control signals of different user devices.Particularly, downlink ack/nack signal and
Downlink power controls signal can be by being re-used and being transmitted in same time-frequency domain with CDMA methods.
In addition, the multiplexing of preceding description and the method for transmission ack/nack signal are equally applicable in the uplink of packet
In the transmission of road ack/nack signal, the packet is also transmitted in downlink.
If in addition, using come transmit the OFDM symbol quantity of ack/nack signal be in particular system it is transformable,
Preferably OFDM symbol number increases and reduces ack/nack signal repeat number according to used in.
Industrial applicibility
According to the specific embodiment of the present invention, when being multiplexed multiple 1 control signal, multiple controls of special user equipment
Signal can be transmitted by orthogonal or quasiorthogonal codes different to each other and mainly using CDMA methods.Therefore, the present invention improves
Reliability in corresponding control signal transmission.
In addition, can be by realizing FDMA and/or TDMA methods simultaneously to transmit 1 control signal and by transmitting in a distributed manner
Multiple control signal of the special user equipment on each time-frequency domain, to obtain frequency and/or time diversity.
In addition, in the case of by multiple time-frequency domains to transmit 1 control signal, used by explicitly pointing out
Orthogonal code (it is used to transmit, and depending on size according to whole time-frequency domain rather than each time-frequency domain size), can
Increase the control signal number that can be transmitted simultaneously.
In addition, in the case of multiple OFDM symbols are used to transmit 1 control signal, different frequencies is passed through
1 control signal being modulated at CDMA methods on different OFDM symbol regions is transmitted in rate domain, can promote resource efficiency and point
Transmission advantage in terms of diversity gain.Moreover, more flexible power distribution also can be reached in each OFDM symbol area.
Therefore, the control information transmission method according to the present invention has the configuration being suitable for application in 3GPP LTE systems.
In addition, the control information transmission method according to the present invention can be applied to Random Communication system, the system and 3GPP LTE systems need
The specification for the control information transformat being used in time-frequency domain.
Although the present invention is described and illustrated with reference to its preferred embodiment, it is evident that those skilled in the art can
Various modifications and change are carried out to it, without departing from the spirit or scope of the present invention.Therefore, the present invention covering claims and
Modification and change of the invention provided in its equivalent regions.
Claims (8)
1. a kind of method that acknowledgement/non-acknowledgement ACK/NACK information is sent by base station, methods described include：
Multiple ACK/NACK are multiplexed into ACK/NACK groups using different orthogonal codes；And
Pass through each transmission of multiple time-frequency resources set ACK/NACK groups, the multiple time-frequency resources collection
The subcarrier for each predetermined number being included in an orthogonal frequency division multiplex OFDM symbol closed,
Wherein, multiple ACK/NACK in the ACK/NACK groups are mutually distinguished by different orthogonal codes,
Wherein, the multiple time-frequency resources set is spaced-apart along frequency axis,
Wherein, when the number for the OFDM symbol transmitted for ACK/NACK is one, the multiple time-frequency resources set
In single OFDM symbol.
2. the method according to claim 11, wherein, when the number for the OFDM symbol transmitted for the ACK/NACK is two
When individual, the multiple time-frequency resources set is alternately in two OFDM symbols.
3. method according to claim 1 or 2, wherein, the multiple ACK/NACK quilts in the ACK/NACK groups
Distinguished additionally by different quadrature phase components.
4. method according to claim 1 or 2, wherein, each of the multiple time-frequency resources set includes 4
Subcarrier.
5. a kind of method that acknowledgement/non-acknowledgement ACK/NACK information is received by user equipment, methods described include：
By each reception ACK/NACK groups of multiple time-frequency resources set, the ACK/NACK groups are including the use of difference
Orthogonal code multiple ACK/NACK, each of the multiple time-frequency resources set be included in an OFDM
The subcarrier of predetermined number in OFDM symbol,
Wherein, multiple ACK/NACK in the ACK/NACK groups are mutually distinguished by different orthogonal codes,
Wherein, the multiple time-frequency resources set is spaced-apart along frequency axis, and
Wherein, when the number for the OFDM symbol transmitted for ACK/NACK is one, the multiple time-frequency resources set
In single OFDM symbol.
6. the method according to claim 11, wherein, when the number for the OFDM symbol transmitted for the ACK/NACK is two
When individual, the multiple time-frequency resources set is alternately in two OFDM symbols.
7. the method according to claim 5 or 6, wherein, the multiple ACK/NACK quilts in the ACK/NACK groups
Distinguished additionally by the different quadrature phase components for modulating the multiple ACK/NACK.
8. the method according to claim 5 or 6, wherein, each of the multiple time-frequency resources set includes 4
Subcarrier.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US82785206P | 2006-10-02 | 2006-10-02 | |
| US60/827,852 | 2006-10-02 | ||
| KR10-2007-0011533 | 2007-02-05 | ||
| KR20070011533 | 2007-02-05 | ||
| US95501907P | 2007-08-09 | 2007-08-09 | |
| US60/955,019 | 2007-08-09 | ||
| KR1020070099055A KR100925436B1 (en) | 2006-10-02 | 2007-10-02 | Method For Transmitting Control Signal Using Efficient Multiplexing |
| CN200780036950.8A CN101627567B (en) | 2006-10-02 | 2007-10-02 | Method for transmitting control signal using efficient multiplexing |
| KR10-2007-0099055 | 2007-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200780036950.8A Division CN101627567B (en) | 2006-10-02 | 2007-10-02 | Method for transmitting control signal using efficient multiplexing |
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| CN104038998A CN104038998A (en) | 2014-09-10 |
| CN104038998B true CN104038998B (en) | 2017-11-21 |
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| CN201410224802.0A Active CN104038998B (en) | 2006-10-02 | 2007-10-02 | Method for carrying out transmission of control signals using efficient multiplexing |
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| US8837526B2 (en) * | 2010-01-11 | 2014-09-16 | Htc Corporation | Carrier indication method for wireless communication system and related communication device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006124042A1 (en) * | 2005-05-13 | 2006-11-23 | Qualcomm Incorporated | On-demand reverse-link pilot transmission |
| CN1956589A (en) * | 2005-10-27 | 2007-05-02 | 华为技术有限公司 | Implement method of uplink/downlink control channel |
-
2007
- 2007-10-02 BR BRPI0719974-0A patent/BRPI0719974A2/en not_active IP Right Cessation
- 2007-10-02 TW TW096136984A patent/TWI444018B/en active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006124042A1 (en) * | 2005-05-13 | 2006-11-23 | Qualcomm Incorporated | On-demand reverse-link pilot transmission |
| CN1956589A (en) * | 2005-10-27 | 2007-05-02 | 华为技术有限公司 | Implement method of uplink/downlink control channel |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0719974A2 (en) | 2014-03-18 |
| TWI444018B (en) | 2014-07-01 |
| TW200830909A (en) | 2008-07-16 |
| CN104038998A (en) | 2014-09-10 |
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