CN101132229A - Transmission method and device for descending shared control signal channel - Google Patents
Transmission method and device for descending shared control signal channel Download PDFInfo
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- CN101132229A CN101132229A CNA2006101151042A CN200610115104A CN101132229A CN 101132229 A CN101132229 A CN 101132229A CN A2006101151042 A CNA2006101151042 A CN A2006101151042A CN 200610115104 A CN200610115104 A CN 200610115104A CN 101132229 A CN101132229 A CN 101132229A
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Abstract
This invention relates to a transmitting method of down-line shared channels including: a base station configures and transmits multiple local and distributed transmitting down-line shared control channels assigned by down-line data transmission resources, UE gets the information of the down-line channel resource collocated by the base station and reports the channel quality to the base station, which selects shared control channels to transmit the assignment and sends down-line data on the distributed resources and the UE receives the data on the distributed resource, in which, a base station can use two kinds of transmission modes on the control signaling assigned by down-line data transmission resources so as to select suitable transmission mode and channels for users to transmit control signaling assigned by down-line resources.
Description
Technical field
The present invention relates to mobile radio communications system, particularly relate to the transmission method and the equipment of a kind of descending shared control signal channel in the descending ofdm system.
Background technology
Now, third generation partner plan (being called for short 3GPP) standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).About the discussion of LTE, OFDM (OFDM) technology will be as the down physical layer transmission technology among the LTE according at present, and single-carrier frequency division multiple access insert (being called for short SC-FDMA) will be as the upstream physical layer transmission technology among the LTE.
Be a kind of multi-carrier modulation communication technology on the OFDM technological essence, its basic principle is the data flow of a two-forty to be decomposed into several rate data streams transmit simultaneously on one group of mutually orthogonal subcarrier.The OFDM technology is because its multicarrier character has performance advantage aspect a lot.(1) significant advantage of OFDM technology is because data parallel transmission on a plurality of subcarriers respectively, and the length of the symbol on each subcarrier increases accordingly, has alleviated because channel delay brings the influence of intersymbol interference; Add protection on each symbol at interval by further giving, promptly introduce Cyclic Prefix (CP), under the situation of channel delay, can eliminate intersymbol interference (ISI) fully less than circulating prefix-length.Like this, each subcarrier has all experienced flat fading channel.(2) availability of frequency spectrum height of OFDM technology, ofdm signal are actual on frequency domain an overlapping, and this overlapping on improved the availability of frequency spectrum to a great extent.(3) ability of the anti-narrow band interference of OFDM technology and frequency selective fading is stronger.By with chnnel coding and being used in combination of interweaving, can strengthen the frequency diversity and the time diversity effect of ofdm system, thereby resist narrow band interference and frequency selective fading effectively.(4) OFDM technology modulation and demodulation can be realized by baseband I FFT/FTT conversion, and IFFT/FFT has ripe quick calculation method, can realize in dsp chip and hardware configuration easily.
In downlink transfer, need send some descending control signalings to subscriber equipment, come the employed resource of indicating downlink transfer of data, to realize scheduling and control to downlink data transmission.At present, a kind of transmission means of feasible descending control signaling utilizes shared control channel to transmit exactly.Usually, the main contents of descending control signaling that transmission is used for the data transmission resources assignment in the descending shared control signal channel have:
● subscriber equipment identifier (UE ID): the subscriber equipment that is used to indicate the downlink data receiving transmission;
● resource assignation: be used to indicate frequency resource to user equipment allocation;
● the duration (Duration): be used to indicate the duration of institute's Resources allocation, this information content is optional.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
For the transmission of above-mentioned resource assignation descending control signaling, there is company to propose to come transfer resource to distribute relevant control signaling at present, as shown in Figure 1 with the method for distributed transmission.
As can be seen from Figure 1, have only those proprietary 1/ layer of 2 (L1/L2) descending control signalings of layer, just can in the frequency range of being dispatched, transmit, obtain bigger frequency selectivity transmission gain.And relevant 1/ layer of 2 (L1/L2) control of the layer signaling of those resource allocations can only be transmitted with distributed way on distributed discrete subcarrier in specific control signaling transmission bandwidth.
Yet, local formula transmission with frequency selective scheduling has higher transmission gain with respect to distributed transmission, if L1/L2 control channel that can resource allocation is relevant also transmits with the local formula transmission manner with frequency selective scheduling gain, so just can further strengthen the transmission performance of resource assignation descending control signaling.
Yet, transmit the user of data in the distributed transmission mode for some, user such as some high-speed mobile, transmit the relevant control signaling of its resource allocation if utilize local formula transmission means, not only can not get the frequency selective scheduling gain, also lose the gain of frequency diversity, will cause the deterioration of descending control signaling transmission performance like this.
Therefore be necessary to design a kind of transmission means of descending shared control signal channel, make and both can allow those users that can obtain the frequency selective scheduling gain when transfer resource distributes relevant descending control signaling, can obtain the frequency selective scheduling gain, can ensure to the user that those can't obtain the frequency selective scheduling gain again, distribute relevant descending control signaling with a kind of distributed mode transfer resource, with the further raising of the transmission performance that realizes the resource assignation descending control signaling.
Summary of the invention
At the problems referred to above, the present invention seeks to propose a kind of transmission method of descending shared control signal channel, make those can utilize the user of frequency selective scheduling gain to distribute relevant control signaling with a kind of transmission means transfer resource of local formula, and those users that can't obtain the frequency selectivity gain distribute relevant control signaling with a kind of distributed transmission means transfer resource, thereby further improve the transmission performance of descending control signaling.
According to an aspect of of the present present invention, a kind of DSCH Downlink Shared Channel transmission method comprises step:
A) a plurality of local formula transmission of base station configuration transmitting downlink data transfer resource assignment and the descending shared control signal channel of a plurality of distributed transmission;
B) subscriber equipment is known the DSCH Downlink Shared Channel information that the base station disposes;
C) subscriber equipment is to base station transmitting channel quality report;
D) base station selected descending shared control signal channel transmitting downlink data transfer resource assignment;
E) base station sends downlink data on the resource of being distributed;
F) downlink data receiving on the subscriber equipment resource of distributing in the base station.
According to a further aspect in the invention, a kind of base station equipment that is used to realize the descending shared control signal channel transmission method comprises transmit/receive antenna, radio frequency sending set, radio-frequency transmitter, D/A switch, mould/number conversion adds Cyclic Prefix, remove Cyclic Prefix, the OFDM modulation module, the Single Carrier Frequency Division Multiple Access demodulation module also comprises:
A) channel quality indication receiving system is used for receiving the channel quality indication that subscriber equipment is reported.This device also comprises: the control channel mapping, and rate-matched is separated in demodulation, separates chnnel coding/deinterleaving, channel quality indication identifier;
B) descending shared control signal channel dispensing device is used to transmit the descending control signaling that is used for the downlink data transmission resource assignation.This device also comprises: control channel mapping, modulation, rate-matched, chnnel coding/interweave, control information maker module.
C) dispensing device of data channel is used in the indicated transmitted over resources data of downlink resource assignment control signaling.This device also comprises: the data channel mapping, and modulation, rate-matched, data channel is encoded/is interweaved, buffer module.
D) scheduler, be used for the transmission of the control signaling that is used for the downlink data transmission resource assignation is controlled, control its descending shared control signal channel transmission and still transmit at the descending shared control signal channel of local formula transmission in distributed transmission, and in which channel.
The present invention is other descending shared control signal channel transmission method relatively, make the base station can use two kinds of transmission means transmission to be used for the control signaling of downlink data transmission resource assignation, make that the base station can be according to the channel condition of subscriber equipment, for the user selects suitable transmission means and suitable Channel Transmission downlink resource assignment control signaling, thereby optimized the transmission performance of data transmission resources assignment control signaling.
Description of drawings
Fig. 1 is existing descending control signaling transmission method schematic diagram;
Fig. 2 is the operating procedure of base station in the descending shared control signal channel transmission method proposed by the invention proposed by the invention;
Fig. 3 is the operating procedure of subscriber equipment in the descending shared control signal channel transmission method proposed by the invention;
Fig. 4 is that the hardware of the descending shared control signal channel transmission method base station that proposed is realized block diagram;
Fig. 5 is based on the descending shared control signal channel configuration embodiment under the transmission block distributed transmission mode;
Fig. 6 is based on the descending shared control signal channel configuration embodiment under the subcarrier distributed transmission mode;
Fig. 7 is the hardware realization block diagram that the base station sends descending shared control signal channel among the embodiment;
Fig. 8 is a descending shared control signal channel transmission method performing step proposed by the invention.
Embodiment
The present invention proposes a kind of transmission method of descending shared control signal channel, and has provided the step and the equipment of the transmission method of realizing this descending shared control signal channel.
The transmission method performing step of the descending shared control signal channel that the inventive method proposed such as Fig. 8 institute are not.
At first, the a plurality of local formula transmission of base station configuration transmitting downlink data transfer resource assignment and the descending shared control signal channel 801 of a plurality of distributed transmission, the base station in the frequency range of specific transmitting control channel, the shared control channel of a plurality of local formula transmission of configuration transmitting downlink data transfer resource assignment control signaling and the descending shared control signal channel of distributed transmission;
The shared control channel of the local formula transmission that wherein base station disposed will be mapped on the frequency resource block of local formula, and pairing each local formula frequency resource block of shared control channel of a plurality of descending local formula transmission that the base station disposed will be dispersed in the frequency range of specific transmitting control channel.
And the shared control channel of the distributed transmission that the base station disposed will be mapped on the distributed subcarrier.The distributed sub-carrier that shared channel was mapped to of the distributed transmission that the base station disposed can be based on wireless resource block (Radio Block based, RB based) distributed sub-carrier also can be based on the distributed sub-carrier of subcarrier (Sub-carrier based).So-called distributed sub-carrier based on wireless resource block is exactly the subcarrier of distributed distribution in several RB, and is exactly the subcarrier of discrete distribution in whole frequency based on the distributed sub-carrier of subcarrier.
Secondly, subscriber equipment is known the DSCH Downlink Shared Channel information 802 that the base station disposes, the method of knowing can be by the be fixed up channel Mapping information of descending shared control signal channel of standard, also can be to receive high-level signaling to know, can also be to know by receiving broadcast channel broadcasts information.
Then, subscriber equipment is to base station transmitting channel quality report 803, and subscriber equipment can be the channel quality report of a plurality of sub-bands to the channel quality measurement report that the base station sends, and also can be the channel quality report of single whole wave band;
Afterwards, base station selected descending shared control signal channel transmitting downlink data transfer resource assignment 804, the assignment of transmission descending shared control signal channel transmitting downlink data transfer resource will be selected according to the channel quality report that subscriber equipment sent in the base station;
Thereafter, the base station sends downlink data 805 on the resource of being distributed;
Afterwards, downlink data receiving 806 on the subscriber equipment resource of distributing in the base station.
The operating procedure of base station is as shown in Figure 2 in the method proposed by the invention:
At first the base station is in the frequency range of specific transmitting control channel, the shared control channel of a plurality of local formula transmission of configuration transmitting downlink data transfer resource assignment control signaling and the descending shared control signal channel 201 of distributed transmission.
The channel Mapping information of the descending shared control signal channel that the base station disposed need allow subscriber equipment know.The mode that subscriber equipment is known can be by standard the channel Mapping information of descending shared control signal channel to be fixed up, or the base station notifies with high-level signaling, also can be the base station broadcast channel broadcasts.
Afterwards, the base station receives the channel quality measurement of subscriber equipment and reports 202, obtains the channel quality report on each frequency sub-band of subscriber equipment, with the situation of the frequency domain selectivity decline of knowing subscriber equipment, or even the time domain change information of some channels.
The base station is that subscriber equipment is determined the downlink data transmission resource and selected suitable descending shared control signal channel to transmit the descending control signaling 203 of its resource assignation.The channel quality indication (CQI) that report according to subscriber equipment the base station is determined the resource of downlink data transmission for subscriber equipment, forms the content of downlink resource assignment control signaling.Afterwards, the base station will make a choice to the transmission means of the descending control signaling of resource assignation, and the descending shared control signal channel transmission of selecting distributed transmission still is the descending shared control signal channel of local formula transmission.The base station also will be fit to the user of local formula transmission, and the shared control channel of the descending preferably local formula transmission of each sub-band upper signal channel quality report selective channel quality of reporting according to subscriber equipment transmits its downlink resource assignment control signaling; For being fit to the user of distributed transmission, select the shared control channel of certain distributed transmission to transmit its downlink resource assignment control signaling.
It should be noted that, if the shared control channel of distributed transmission also can transmit the descending control signaling of local formula resource assignation, so for those users who in the local formula transmission shared control channel that is being disposed, can not find the shared control channel of the local preferably formula transmission of channel quality, just can utilize the shared control channel of distributed transmission to transmit the local formula resource assignation descending control signaling of its downlink data transmission.The benefit of doing like this is for these users that can't utilize the frequency selectivity transmission gain of local formula transmission, still can utilize the frequency diversity gain of distributed transmission to come transmitting downlink control signal.Otherwise the distributed resource assignment that the descending shared control signal channel of local formula transmission also can the transmitting downlink data transmission so also can increase the flexibility that downlink resource assignment control signaling is transmitted.
If yet add a restrictive condition, promptly the shared control channel of distributed transmission can only transmit distributed resource assignation control signaling, and the shared control channel of local formula transmission can only transmit the shared control channel of local formula.Like this, in the control signaling of resource assignation, be that local formula resource allocation still has been a distributed resource allocation with regard to need not to indicate this resource allocation with clear and definite information bit, can reduce the burden of resource assignation descending control signaling to a certain extent.Under this restrictive condition, subscriber equipment will be according to the type (local formula transmission or distributed transmission) of the employed descending shared control signal channel in base station, determine that the base station gives the type of the downlink data transmission resource of this user equipment allocation (being local formula downlink data transmission resource or distributed downlink data transmission resources), and in the content of descending shared control signaling, the sequence number of identification institute Resources allocation, thereby the resource assignation of acquisition downlink data transmission.
Transmitted in descending shared control signal channel after the descending control signaling of indicating its transfer of data downlink resource, the base station just can be at the indicated transmitted over resources downlink data 204 of resource assignation descending control signaling.If the control signaling of resource assignation indication is that local formula resource will be done local formula downlink data transmission in the base station so in the step 203, and if the indication of the control signaling of resource assignation be distributed resource, the distributed downlink transfer of data will be done in the base station so.
It should be noted that base station in the step 204 can also transmit this user's data transformat and mix the relevant descending control signaling of automatic repeat requests (HARQ) on the indicated running time-frequency resource of resource assignation control signaling.
In the step 203, the main contents of the resource assignation descending control signaling that transmit in descending shared control signal channel the base station have:
● subscriber equipment identifier (UE ID): the subscriber equipment that is used to indicate the downlink data receiving transmission;
● resource assignation: be used to indicate frequency resource to user equipment allocation;
● the duration (Duration) (if necessary): the duration that is used to indicate institute's Resources allocation.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
Wherein, the relevant control signaling content of resource assignation can indicate local formula running time-frequency resource to be used for transfer of data, also can indicate distributed running time-frequency resource to be used for transfer of data.
Yet the information content that resource assignation is relevant may be according to whether foregoing restrictive condition being arranged and difference.If restrictive condition noted earlier has been arranged, the type that does not so just need clear and definite information bit specified resource distribution is distributed resource allocation or local formula resource allocation.If there is not foregoing restrictive condition, the type that may need clear and definite information bit specified resource distribution so in resource assignment information is distributed resource allocation or local formula resource allocation.
The operating procedure of the subscriber equipment in the transmission method of the descending shared control signal channel that the inventive method proposed is as shown in Figure 3:
At first subscriber equipment is known the channel Mapping information 301 of the descending shared control signal channel of local formula transmission that the base station disposes and distributed transmission, the method of knowing can be by the be fixed up channel Mapping information of descending shared control signal channel of standard, also can be to receive high-level signaling to know, can also be to know by receiving broadcast channel broadcasts information.
Afterwards, subscriber equipment is to base station transmitting channel quality measurement reports 302.Subscriber equipment can be the channel quality report of a plurality of sub-bands to the channel quality measurement report that the base station sends, and also can be the channel quality report of single whole wave band.
Then, subscriber equipment will be in the descending shared control signal channel of the base station disposed local formula transmission and distributed transmission detection descending control signaling 303.Whether the method for its detection is exactly will differentiate in the control signaling of certain descending shared control signal channel transmission the subscriber equipment identifier (UEID) of oneself to be arranged, and is exactly to issue the descending control signaling of oneself if can detect the control signaling that the UE ID of oneself transmits so in this down control channel.
Then, subscriber equipment can be according to the downlink data transmission resource indication downlink data receiving transmission 304 that is identified in descending shared control signaling.
The present invention gives the hardware of the descending shared control signal channel transmission method base station that realization proposes and realizes block diagram, as shown in Figure 4:
As can be seen from the figure, receiver is reported by 401 channel quality measurements in the base station, 402 channel decoders, and 403 channel quality report indication information identifiers identify the channel quality indication (CQI) information that subscriber equipment is reported, and pass to scheduler 404.
Sent after the control signaling, scheduler 404 will be controlled data from high level through 405 buffers, 406 encoders, and 407 user data transmission devices send to subscriber equipment on the resource of control signaling institute assignment.
Embodiment
In the descending shared control signal channel method that the present invention provides, base station configuration two kinds of descending shared control signal channels, a kind of is local formula shared control channel, another is distributed shared control channel.According to the discussion among the present LTE, distributed transmission has dual mode, a kind of (RBbased) distributed transmission that is based on transmission block, another is based on subcarrier (Sub-carrier based) distributed transmission, provides 2 embodiment of base station configuration descending shared control signal channel of the present invention below respectively for these two kinds of distributed transmission modes.
Suppose:
● the descending shared control signal channel that the base station disposed all transmits in the 1st OFDM symbol of each subframe;
● have 96 subcarriers in the whole system bandwidth, wherein per 12 subcarriers are that (Resource Block RB), so has 8 Resource Block to a Resource Block in the system bandwidth;
● transmit the needed number of sub carrier wave of each descending shared control signal channel and also be 12.
It should be noted that the number that provides in this embodiment among number of sub carrier wave total in the whole system bandwidth and each RB is for the purpose of illustration only.In reality realizes, in the system bandwidth altogether number of sub carrier wave and the number of each RB, can change according to the variation of practical application.In addition, in the present embodiment, needed number of sub carrier wave also is for the purpose of illustration only in each descending shared control signal channel, and the required number of sub carrier wave of descending shared control signal channel also can be not equal to a money carrier number among the RB in actual applications.
The base station can dispose the descending shared control signal channel of local formula transmission of similar number and the DSCH Downlink Shared Channel of distributed transmission, as base station configuration the shared control channel of the shared control channel of 4 local formula transmission and 4 distributed transmission shown in Fig. 5 (a).
Among the figure, L-SCCH1 is the descending shared control signal channels of the local formula transmission of 4 of being disposed to L-SCCH4, and D-SCCH1 is the descending shared control signal channel of 4 distributed transmission being disposed to D-SCCH4.
Wherein the channel Mapping information of the shared control channel that the base station disposed can be fixed up by standard, also can pass through high-level signaling or broadcast signaling notifying user equipment.
When subscriber equipment after the base station has sent channel quality report, the descending shared control signal channel that each subscriber equipment selects suitable local formula transmission or the descending shared control signal channel of distributed transmission just can be given in the base station.Such as the base station is according to certain user's channel quality report, and judging this user is that using of a high-speed mobile produced, and therefore will select a distributed transmission shared control channel (such as D-SCCH2) is its transfer resource assignment descending control signaling; And according to certain user's channel quality report, this user is a user that low speed moves, and the channel quality report of a plurality of sub-bands of this user is at transmission block 1, transmission block 3, in transmission block 5 and the transmission block 7, the channel quality of transmission block 5 is best, and the base station will be its transfer resource assignment descending control signaling for this user selects the descending shared control signal channel L-SCCH3 of local formula transmission.
If it should be noted that certain descending shared control signal channel is not used in the transmission of resource assignation descending control signaling in certain subframe, so also can use it for downlink data or other transmission of Information by the indication of resource assignation descending control signaling.
In addition, when the base station configuration descending shared control signal channel, the channel that is disposed also can only take a part of resource of system bandwidth, and does not take the whole system bandwidth.
In addition, the base station is to dispose the shared channel of descending local formula transmission of different numbers and the descending shared control signal channel of distributed transmission at the configurating downlink shared control channel, such as dispose the descending shared control signal channel of 6 local formula transmission and the descending shared control signal channel of 2 distributed transmission, shown in Fig. 5 (b).
The base station can dispose the descending shared control signal channel of local formula transmission of similar number and the DSCH Downlink Shared Channel of distributed transmission, as base station configuration the shared control channel of the shared control channel of 4 local formula transmission and 4 distributed transmission shown in Fig. 6 (a).
Among the figure, D-SCCH1 is the descending shared control signal channel of the descending shared control signal channel of 4 distributed transmission being disposed for 4 distributed transmission of discrete distribution in the whole system frequency range to D-SCCH4, and L-SCCH1 is 4 descending shared control signal channels that local formula is transmitted that disposed to L-SCCH4, they have taken transmission block RB1 respectively, RB2, the interior subcarrier of son ripple of RB3 and RB4 except that the distributed transmission channel occupancy.
Equally, the channel Mapping information of the shared control channel that the base station disposed can be fixed up by standard, also can pass through high-level signaling or broadcast signaling notifying user equipment.
When subscriber equipment after the base station has sent channel quality report, the descending shared control signal channel that each subscriber equipment selects suitable local formula transmission or the descending shared control signal channel of distributed transmission just can be given in the base station.Such as the user that this user is a high-speed mobile is judged according to certain user's channel quality report in the base station, and therefore will select a distributed transmission shared control channel (such as D-SCCH2) is its transfer resource assignment descending control signaling; And according to certain user's channel quality report, this user is a user that low speed moves, and the channel quality report of a plurality of sub-bands of this user is at transmission block 1, transmission block 3, in transmission block 5 and the transmission block 7, the channel quality of transmission block 5 is best, and the base station will be its transfer resource assignment descending control signaling for this user selects the descending shared control signal channel L-SCCH3 of local formula transmission.
If it should be noted that certain descending shared control signal channel is not used in the transmission of resource assignation descending control signaling in certain subframe, so also can use it for downlink data or other transmission of Information by the indication of resource assignation descending control signaling.
In addition, when the base station configuration descending shared control signal channel, the channel that is disposed also can only take a part of resource of system bandwidth, and does not take the whole system bandwidth.
In addition, the base station also can dispose the shared channel of descending local formula transmission of different numbers and the descending shared control signal channel of distributed transmission at the configurating downlink shared control channel, such as dispose the descending shared control signal channel of 6 local formula transmission and the descending shared control signal channel of 2 distributed transmission, shown in Fig. 6 (b).
After subscriber equipment has obtained the descending shared control signal channel information that the base station disposed, subscriber equipment just can detect the descending shared control signal channel that is disposed, whether have oneself UEID in certain descending shared control signal channel transmit, indicated if having just can detect to own downlink data transmission resource of being distributed if detecting.
The hardware that gives the base station transmits descending shared control signal channel is in the present embodiment realized block diagram, as shown in Figure 7.
The base station is by 701 transmit receive antennas, 702 radio-frequency transmitters, 703 moulds/number conversion, 704 remove Cyclic Prefix, 705 Single Carrier Frequency Division Multiple Access (SC-FDMA) demodulation, the mapping of 706 control channels, 707 demodulation, 708 separate rate-matched, and 709 separate chnnel coding/deinterleaving, 710 channel qualities indications identifier obtains the channel quality measurement report that subscriber equipment sends and passes to 711 schedulers.
The channel quality information that scheduler 711 will be reported according to subscriber equipment produces scheduling assignment control signaling, passes to 712 control information makers, 713 chnnel codings/interweave, 714 rate-matched, 715 modulation, 716 control channel mappers.
Scheduler 711 is also according to method proposed by the invention, control 716 control channel mapping blocks, other information of the channel quality report that sends according to subscriber equipment and some will be used for being mapped to the descending shared control signal channel of suitable local formula transmission or the descending shared control signal channel of distributed transmission to the control signaling of subscriber equipment indicating downlink data transmission resources.
Through the control signaling of channel Mapping, will be through 717 OFDM modulation, 718 add Cyclic Prefix, 719 steering D/A conversions, 720 radio frequency sending sets, 701 transmitting antennas are issued subscriber equipment.
After having sent the control signaling that is used for resource assignation, scheduler 711 will be controlled 721 buffers, will be from the data of high level through 722 digital coding/interweave, and 723 rate-matched, 724 modulation are to 725 data channel mapping blocks.Scheduler 711 will be controlled 725 data channel mapping blocks, and data map is arrived the indicated transmitted over resources of descending control signaling, and modulate through 717 OFDM, 718 add Cyclic Prefix, 719 steering D/A conversions, 720 radio frequency sending sets, 701 transmitting antennas are issued subscriber equipment.
Claims (13)
1. DSCH Downlink Shared Channel transmission method comprises step:
A) a plurality of local formula transmission of base station configuration transmitting downlink data transfer resource assignment and the descending shared control signal channel of a plurality of distributed transmission;
B) subscriber equipment is known the DSCH Downlink Shared Channel information that the base station disposes;
C) subscriber equipment is to base station transmitting channel quality report;
D) base station selected descending shared control signal channel transmitting downlink data transfer resource assignment;
E) base station sends downlink data on the resource of being distributed;
F) downlink data receiving on the subscriber equipment resource of distributing in the base station.
2. according to the method described in the claim 1, it is characterized in that step a), the shared control channel of the local formula transmission that described base station disposed will be mapped on the frequency resource block of local formula, and pairing each local formula frequency resource block of shared control channel of a plurality of descending local formula transmission that the base station disposed will be dispersed in the frequency range of specific transmitting control channel.
3. according to the method described in the claim 1, it is characterized in that step a), the shared control channel of the distributed transmission that described base station disposed will be mapped on the distributed subcarrier, and the distributed sub-carrier that shared channel was mapped to of the distributed transmission that the base station disposed is based on the distributed sub-carrier of wireless resource block.
4. according to the method described in the claim 1, it is characterized in that step a), the shared control channel of the distributed transmission that described base station disposed will be mapped on the distributed subcarrier, and the distributed sub-carrier that shared channel was mapped to of the distributed transmission that the base station disposed is the distributed sub-carrier that is based on subcarrier.
5. according to the method described in the claim 1, it is characterized in that step b), subscriber equipment is known the mode of the descending shared control signal channel information that the base station disposes, and can be by standard the channel Mapping information of descending shared control signal channel to be fixed up.
6. according to the method described in the claim 1, it is characterized in that step b), subscriber equipment is known the mode of the descending shared control signal channel information that the base station disposes, and can be to be notified with high-level signaling by the base station.
7. according to the method described in the claim 1, it is characterized in that step b), subscriber equipment is known the mode of the descending shared control signal channel information that the base station disposes, and can be by the base station broadcast channel broadcasts.
8. according to the method described in the claim 1, it is characterized in that step d), described selection descending shared control signal channel is meant that selecting the DSCH Downlink Shared Channel of local formula transmission still is the descending shared control signal channel of distributed transmission.
9. according to the method described in the claim 1, it is characterized in that step d), the descending shared control signal channel that described selection is fit to is meant that the base station also will be the user who is fit to local formula transmission, and the shared control channel of the descending preferably local formula transmission of each sub-band upper signal channel quality report selective channel quality of reporting according to subscriber equipment transmits its downlink resource assignment control signaling.
10. according to the method described in the claim 1, it is characterized in that step d), no matter described descending shared control signal channel is local formula transmission or distributed transmission, all is both can the local formula resource assignation of indicating downlink transfer of data, distributed resource assignment that again can the indicating downlink transfer of data.
11. according to the method described in the claim 1, it is characterized in that step d), described descending shared control signal channel is the local formula resource assignation control signaling that the descending shared control signal channel of local formula transmission can only the transmitting downlink data transmission, and the distributed resource assignment control signaling that the descending shared control signal channel of distributed transmission can only the transmitting downlink data transmission.
12. according to the method described in the claim 11, it is characterized in that subscriber equipment will be according to the type of the employed descending shared control signal channel in base station, determine that the base station gives the type of the downlink data transmission resource of this user equipment allocation, and in the content of descending shared control signaling, the sequence number of identification institute Resources allocation, thereby the resource assignation of acquisition downlink data transmission.
13. a base station equipment that is used to realize the descending shared control signal channel transmission method comprises transmit/receive antenna, radio frequency sending set, radio-frequency transmitter, D/A switch, mould/number conversion adds Cyclic Prefix, removes Cyclic Prefix, the OFDM modulation module, the Single Carrier Frequency Division Multiple Access demodulation module also comprises:
A) channel quality indication receiving system is used for receiving the channel quality indication that subscriber equipment is reported;
B) descending shared control signal channel dispensing device is used to transmit the descending control signaling that is used for the downlink data transmission resource assignation;
C) dispensing device of data channel is used in the indicated transmitted over resources data of downlink resource assignment control signaling;
D) scheduler, be used for the transmission of the control signaling that is used for the downlink data transmission resource assignation is controlled, control its descending shared control signal channel transmission and still transmit at the descending shared control signal channel of local formula transmission in distributed transmission, and in which channel.
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| CNA2006101151042A CN101132229A (en) | 2006-08-21 | 2006-08-21 | Transmission method and device for descending shared control signal channel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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