CN101682406A - Method for mapping physical downlink control channel to resources and apparatus for transmitting/receiving the mapped physical downlink control channel in a wireless communication system - Google Patents

Method for mapping physical downlink control channel to resources and apparatus for transmitting/receiving the mapped physical downlink control channel in a wireless communication system Download PDF

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CN101682406A
CN101682406A CN200880017154A CN200880017154A CN101682406A CN 101682406 A CN101682406 A CN 101682406A CN 200880017154 A CN200880017154 A CN 200880017154A CN 200880017154 A CN200880017154 A CN 200880017154A CN 101682406 A CN101682406 A CN 101682406A
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pdcch
mapped
subframe
control channel
mapping
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CN101682406B (en
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俞在天
权桓准
金东熙
林妍周
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method for mapping a Physical Downlink Control Channel (PDCCH) to resources and an apparatus for transmitting/receiving the mapped PDCCH in a wireless communication system are provided, in which ifat least one PDCCH is scheduled to be transmitted in a subframe according to a predetermined scheduling scheme, the PDCCHs are concatenated, interleaved, and mapped to at least one Resource Element (RE).

Description

The method of mapping physical downlink control channel to resources and receive and dispatch the device of the physical downlink control channel of this mapping in wireless communication system
Technical field
The present invention relates generally in wireless communication system, effectively use control channel to realize the method and apparatus of maximum interference diversity.More specifically, the present invention relates to a kind of in OFDM (OFDMA) wireless communication system effectively mapping physical downlink control channel (PDCCH) to the method and apparatus of time-frequency resources.
Background technology
Recently, positive active research OFDM (OFDM) is with as the promising means that are used for high speed data transfer on the wire/wireless channel in the mobile communication system.OFDM is the special case of multi-carrier modulation (MCM), and wherein Shu Ru serial code element sequence is converted into the paralleled code element sequence and is modulated onto quadrature subcarrier, i.e. channel subcarrier.OFDMA is multi-user's version of OFDM, and wherein a plurality of users are distinguished by subcarrier, that is, different sub-carrier allocation are to different user.
Fig. 7 explanation sends the method for data to a plurality of users in traditional OFDMA system.
With reference to figure 7, the trunnion axis express time, and vertical axis is represented frequency.Reference number 701 expression time-domain resource allocation units generally include a plurality of OFDM code elements.This resource allocation time quantum is called subframe.When the total system frequency band division is N frequency band, reference number 702,703 and 704 expressions first, N-1 and N frequency band.Each frequency band generally comprises a plurality of subcarriers.As shown in Figure 7, typically, utilize time and frequency resource to form a plurality of Resource Block in the ofdm system, and give a plurality of users with resource allocation with the Resource Block form.Single Resource Block is equivalent among Fig. 7 by a subframe and the resource that frequency band defines.For example, be made up of 14 OFDM code elements if frequency band comprises 12 subcarriers and a subframe, then a Resource Block has individual time of 168 (12 * 14) and frequency resource.Minimum time and frequency resource unit, that is, a subcarrier in OFDM code element is called as resource element (RE).
As mentioned above, Node B is that unit notifies UE at least one subscriber equipment (UE) Resources allocation and by the resource allocation information in each subframe with resource allocation result with the Resource Block in each subframe in ofdm system.The channel that carries resource allocation information is control channel or the PDCCH that shares.Hereinafter, PDCCH is called control channel.Generally, control channel can comprise other information outside resource allocation information, be not described in detail here.The information that comprises resource allocation information that control channel is sent is called control information.Single control channel carries the resource allocation information about single UE.Thus, when in subframe, during simultaneously to a plurality of UE Resources allocation, sending a plurality of control channels to UE.
Generally, in chnnel coding with after interweaving, be transferred to before the user, Node B is that the control channel that a plurality of users produce is mapped to RE according to time division multiplexing/frequency division multiplexing (TDM/FDM).For each Node B and each subframe are shone upon control channel by same way as.Resource mapping table shows control channel is mapped to physics RE.For example, if in subframe, send five control channels, then in each Node B, five control channels are mapped to RE by same way as.Therefore, when taking place to disturb between from the control channel of different nodes B, lack random effect and may cause mis-behave.In other words, any control channel is sensitive to some statistics strong jamming, mis-behaves as a result.
Summary of the invention
The one side of example embodiment of the present invention is to solve above-described at least problem and/or not enough and the advantage of the following stated at least is provided.Therefore, an aspect of of the present present invention provides a kind of and is used for physical downlink control channel PDCCH is mapped to the method for resource in wireless communication system so that reduce the interference that the PDCCH from Node B is subjected to from the PDCCH from other Node B.
Another aspect of the present invention provides a kind of being used to send according to the device of the PDCCH of preordering method mapping so that reduce the interference that the PDCCH from Node B is subjected to from the PDCCH from other Node B in wireless communication system.
Another aspect of the present invention provides a kind of being used to receive according to the device of the PDCCH of preordering method mapping so that reduce the interference that the PDCCH from Node B is subjected to from the PDCCH from other Node B in wireless communication system.
One side according to this aspect, a kind of method that is used for a plurality of PDCCH are mapped to resource in wireless communication system is provided, send in subframe if wherein dispatch at least one PDCCH according to predetermined scheduling scheme, then PDCCH is connected, interweaves and is mapped at least one RE.
According to another aspect of the present invention, a kind of method that is used for a plurality of PDCCH are mapped to resource in wireless communication system is provided, if wherein dispatching at least one PDCCH according to predetermined scheduling scheme sends in subframe, then distribute at least one CE, and connect, interweave and be mapped at least one RE to each PDCCH.
According to another aspect of the present invention, a kind of method that is used for a plurality of PDCCH are mapped to resource in wireless communication system is provided, if wherein dispatching at least one PDCCH according to predetermined scheduling scheme sends in subframe, then at least one control element (CE) is assigned to each PDCCH and is connected, the CE of each connection is modulated onto at least one modulated symbol, and modulated symbol interweaved and is mapped to RE.
According to one side more of the present invention, provide a kind of in wireless communication system, being used for that a plurality of PDCCH are mapped to the device that resource concurrence send the PDCCH of mapping, wherein connector is used for, send in subframe if dispatch at least one PDCCH, then distribute the CE of at least one control channel element (CE) to each PDCCH and connection distribution according to predetermined scheduling scheme; Interleaver interweaves through the CE of connection; And CE is mapped to RE to the RE mapper with the CE through interweaving.
According to one side more of the present invention, provide a kind of in wireless communication system, being used for that a plurality of PDCCH are mapped to the device that resource concurrence send the PDCCH of mapping, wherein connector is used for, send in subframe if dispatch at least one PDCCH, then distribute the CE of at least one CE to each PDCCH and connection distribution according to predetermined scheduling scheme; Modulator is modulated at least one modulated symbol with each of the CE that connects; The interleaver modulated symbol that interweaves; And CE is mapped to RE to the RE mapper with the modulated symbol through interweaving.
Provide a kind of device that is used to receive the PDCCH that is mapped to resource in wireless communication system more on the one hand according to of the present invention, wherein analog to digital converter will be a digital signal through the conversion of signals of antenna reception; Fast Fourier transform (FFT) processor conversion digital signal is to frequency signal; Extract pilot tone the pilot tone extractor resource element (RE) that control channel element (CE) is mapped in the middle of the subcarrier of frequency signal; Channel estimator uses pilot tones to carry out channel estimating; RE separates mapping CE to the CE de-mapping device from RE; Deinterleaver deinterleaves is through separating the CE that mapping obtains; Demodulator uses the channel estimating demodulates information that receives from the channel estimator CE through deinterleaving; The division device is separated into many PDCCH information with the CE of demodulation; With a plurality of channel decoders, described many PDSCH information are used to decode.
Description of drawings
Following detailed description in conjunction with the drawings, above-mentioned and others, the feature and advantage of concrete example embodiment of the present invention will be more clear, wherein:
Fig. 1 explanation mapping PDCCH according to the present invention is to the operation of RE.
Fig. 2 explanation is according to operation of shining upon the control channel element (CE) of PDCCH to RE of the present invention.
Fig. 3 is the block diagram according to PDCCH dispensing device of the present invention.
Fig. 4 is the flow chart of explanation according to PDCCH sending method of the present invention.
Fig. 5 is the block diagram according to PDCCH receiving system of the present invention.
Fig. 6 is the flow chart of explanation according to PDCCH method of reseptance of the present invention.
Fig. 7 explanation sends the method for data to a plurality of users in traditional OFDMA system.
Run through accompanying drawing, will be understood that identical referenced drawings numeral identical element, feature and structure.
Embodiment
Be provided for such as the theme of the specification of detailed structure and element definition and help fully understanding of example embodiment of the present invention.Therefore, those of ordinary skill in the art can recognize: under situation about not departing from the scope of the present invention with spirit, can make various changes and modification to embodiment described here.Simultaneously, for clarity and brevity, the explanation of known function and structure will be omitted.
In order to realize that definition is used for the resource allocation unit of control channel transmission, control channel element (CE) according to the method for mapping control channel of the present invention to resource.CE is that with the different of Resource Block CE is the resource allocation unit that is used for the transmission of control channel, and Resource Block is to be used for the data transmissions unit.When at least one control channel being scheduling to when sending, distribute one or more CE to each control channel in subframe according to predetermined scheduling scheme.At least one CE is connected, and the code element among the CE is interleaved by the deinterleaving method specific to each Node B.The symbol mapped that just interweaves then is to RE.CE also can carry out by the scheme specific to each Node B to the RE mapping.
Fig. 1 explanation mapping PDCCH according to the present invention is to the operation of RE.In the situation of Fig. 1 explanation, six control channels, control channel 1, control channel 2 ... control channel 6 is sent to six UE in subframe.Each of six control channels comprises one of them the resource allocation information about six UE.In step 110, about the resource allocation information of each UE by according to predictive encoding scheme chnnel coding such as convolutional encoding.At least one CE is assigned to each control channel then.As previously mentioned, CE is defined as the resource allocation unit that is used for the control channel transmission, comprises a plurality of logic RE.Because the mapping between CE and physics RE can accomplished in various ways, RE is called logic RE.For example, when a CE comprised 36 logic RE, this shows can send 36 modulated symbols in a CE.Each of control channel distributed at least one CE in reference number 121 to 126 expressions.In the situation of Fig. 1 explanation, distribute CE, two CE, three CE, two CE, CE and a CE to control channel 1 to 6 respectively.The reason of the CE of varying number being distributed to different control channels is that UE is placed in (different received signal to noise ratio (SNR)) in the different channel statuss.For example, the UE that receives control channel 1,5 and 6 (121,125 and 126) is in good channel status, and control information can send to each UE in a CE (that is 36 modulated symbols).On the contrary, the UE that receives control channel 3 (123) is in poor channel circumstance, so control information sends to UE in three CE (that is 108 modulated symbols).Though among Fig. 1 altogether 10 CE be used to transmit control channel, the total quantity of CE is variable in each subframe.In step 120, comprise that all CE of control channel are connected.In step 130, the code element among the CE through connecting is interleaved, that is, the order of the CE through connecting is replaced.Use different interleaving scheme to promote among each BS CE to each sub-district, be implemented between the transmission period of each control channel randomization thus from the interference of neighbor bss to the randomization that RE shines upon.
Interweaving of step 130 will be described in more detail.The CE of each connection comprises a plurality of logical elements (LE) 127, its CE index such as equation (1) expression,
Figure G2008800171544D00051
J wherein CE=0 ..., N CEi LE=0 ..., N LE
....(1)
The LE of each CE can interweave and is not restricted to concrete scheme by any-mode.Thus, by equation (2) LE that interweaves,
k int?erlveadLE＝f int?erleaving(i LE)
....(2)
F wherein Int erleaving() represents to interweave function.
Can use deleted bit counter-rotating order (PBRO) replacement scenario so that random permutation N LEThereby the adjacent LE of the order of individual LE away from each other.PBRO has different side-play amounts for each BS or each subframe.The PBRO offset-lists of each subframe of each BS is shown Offset Sec tor, subframe_indexSo, after interweaving, the index of each LE is provided by equation (3).
k int?erlveadLE＝f int?erleaving((i LE+Offset sector，subframe_index)mod?N LE)
＝PBRO((i LE+Offset sector，subframe_index)mod?N LE，N LE)
....(3)
Therefore PBRO such as equation (4) definition,
y＝PBRO(i，N LE)
....(4)
The PBRO substitution value produces in the following order.
Step 1.The PBRO parameter, n selects according to equation (5),
N LE≤2n????....(5)
Step 2.I and j are set to initial value 0.
Step 3.X is defined as using the bit reversal value of the j of n bit-binary form, and for example, if n is 4 and j is 3, then x is 12.
Step 4.If x≤N LE, PBRO (i, N then are set LE) be x and i increased by 1.
Step 5.Otherwise, j is increased by 1.
Step 6.If i＜M, then program is got back to step 3.
As i LEIt is k that individual LE is rearranged Int erlveadLEThe index of individual LE and the LE that rearranges is o Int erlveadLEThe time, o Int erlveadLEBe to be 0 ..., N LE-1 one of them the LE index of sequential interleaved.
In above PBRO deinterleaving method, for N LE=12 and Offset Sec tor, subframe_index=2, k Int erlveadLE, (i LE+ Offset Sec tor, subframe_index) mod N LE, and o Int erlveadLEFollowing providing.
Table 1
(i LE+Offset sec?tor，subframe_index)mod?N LE 2 ?3 ??4 ??5 ??6 ??7 ??8 ??9 ??10 ??11 ??0 ??1
k int?erlveadLE ??4 ??2 ??10 ??6 ??1 ??9 ??5 ??3 ??11 ??7 ??0 ??8
o int?erlveadLE ??0 ??1 ??2 ??3 ??4 ??5 ??6 ??7 ??8 ??9 ??10 ??11
As table 1 as can be known, k Int erlveadLEBe index, it can be by scattering N as much as possible LEIndividual LE obtains.
Though each BS interweaves and interweaves differently by the distinctive side-play amount of BS being applied to PBRO, obviously also can use additive method.
In step 140, the modulated symbol through interweaving of control channel is mapped to the RE that branch is used in the transmission of control channel.This is mapped among each BS or in each subframe or in each OFDM code element or can be different in each OFDM code element of each subframe of each BS.With reference to figure 2, this mapping will be described in more detail.
Fig. 2 explanation is according to operation of shining upon the CE of PDCCH to RE of the present invention.To be described in mapping between CE or LE and the RE with reference to figure 2.As previously mentioned, CE is used for the resource allocation unit of control channel and single PDCCH can have at least one CE.LE is the element of CE.When CE is mapped to RE, the LE of CE according to correspondence mappings one by one to RE.In other words, a CE is mapped to a plurality of RE.Described all LE through interweaving of Fig. 1 are mapped to the RE of Fig. 2.RE is except pilot tone or serve available subcarrier the subcarrier of other purposes in the time-frequency domain.At Fig. 2, reference number 210 expressions are used for the pilot subcarrier of antenna, and reference number 220 expression RE.
Though the described CE of Fig. 2 is to be used for the 3rd generation partner plan (3GPP) Long Term Evolution (LTE) system to RE (LE is to RE) mapping, the CE that describes only is a Demonstration Application to the RE mapping, and the present invention is not limited to specific system.Therefore, the present invention also is applicable to other system.Among Fig. 2, a time slot is defined by 7 OFDM code elements, and two time slots form a subframe in the ofdm system.The T/F zone comprises through the pilot subcarrier of each antenna transmission and LE with the RE that is mapped to, shown in reference number 230.By reference number 240,250 and 260 as can be known, nearly three OFDM code elements comprise the RE that LE will be mapped to, and LE can be mapped to the identical or different RE in the different OFDM code elements.
The LE-RE mapped mode is specific to each OFDM code element.Do not have when mapped as all RE of last OFDM code element particularly, LE is mapped to the RE that scatters equably on total frequency band.For example, the total quantity as the LE through interweaving is N LEAnd the index of the LE through interweaving is o Int erlveadLEThe time, can be used for LE in an OFDM code element is N to the quantitaes of the RE of RE mapping RE, 0If N RE, 0≤ N LE, then have 0 ..., N RE, 0-1 as o Int erlveadLELE be mapped to the RE of an OFDM code element by any-mode.Carrying out LE in this manner in the second and the 3rd OFDM code element shines upon to RE.Calculate the index of the LE that is mapped to each OFDM code element by equation (6).
, if N RE, 0＞N LE, then have 0 ..., N LE-1 as o Int erlveadLELE by being mapped to an OFDM code element by any distribution mode.
The index that is mapped to the LE of RE in each OFDM code element is provided by following:
o Int erleavedLE, 0=0 ..., N LEIf-1 N LE＜N RE, 0... .. (1)
=0 ..., N RE, 0-1 otherwise ... .. (2)
o Int erleavedLE, 1=N RE, 0..., N LEIf-1 N RE, 0＜=N LE＜N RE, 1... .. (3)
=N RE, 0..., N RE, 1-1 otherwise ... .. (4)
o Int erleavedLE, 2=N RE, 1..., N LEIf-1 N RE, 1＜=N LE＜N RE, 2... .. (5)
=N RE, 1..., N RE, 2-1 otherwise ... .. (6)
....(6)
LE can carry out with any mapping ruler to the RE mapping.According to the present invention, use PBRO.
After calculating is mapped to the index of LE of each OFDM code element, under the situation that equation (6) is described, the LE order can be mapped to RE by equation (7).
l mappedRE，j＝f LEtoREmapping(o int?erleavedLE，j)
＝o int?erleavedLE，j
....(7)
Simultaneously, can carry out LE to the RE mapping in the PBRO scheme, this scheme is used to interweaving according to following equation (8).
l mappedRE，j＝f LEtoREmapping((o int?erleavedLE，j+Offset sector，subframe_index，j)mod?N RE，j)
＝PBRO((o int?erleavedLE，j+Offset sector，subframe_index，j)mod?N RE，j，N RE，j)
....(8)
If N LE=12 and N RE, 0=N RE, 1=N RE, 2=4, l MappedRE, j(o Int erleavedLE, j+ Offset Sector, subframe_index, j) mod N RE, jProvide as following table 2, about Offset Sector, subframe_index, 0=1, Offset Sector, subframe_index, 1=2, and Offset Sector, subframe_index, 2=3 situation.
Table 2
??o int?erleavedLE，j ??0 ??1 ??2 ??3
??l mappedRE，0 ??2 ??1 ??3 ??0
??l mappedRE，1 ??1 ??3 ??0 ??2
??l mappedRE，2 ??3 ??0
Reference table 2, LE only is mapped to RE 0 and RE 3 in frequency domain in last OFDM code element.For this situation, when the OFDM code element is not full of LE, use the PBRO scheme to scatter LE as much as possible.
Fig. 3 is the block diagram according to PDCCH dispensing device of the present invention.
With reference to figure 3, channel encoder 301 to 308 chnnel coding PDCCH and connector 302 are pressed the PDCCH that preordering method connects the channel coding, and this preordering method is not limited to ad hoc approach of the present invention.Interleaver 303 is the PDCCH that each BS or each subframe interweave in a different manner and connect.The BS information, sub-frame information and the OFDM code element information that are used to interweave required are Pilot PN, subframe index and the OFDM symbol index that slave controller 304 receives.The signal of modulator 305 modulation through interweaving, and CE in a different manner shines upon CE to RE for each BS, each subframe and each OFDM code element to RE mapper 306 under the control of controller 304.Pilot tones inserter 307 will be corresponding with each antenna pilot tones insert through CE in the signal of RE mapping, and will insert pilot tone offer inverse fast fourier transform (IFFT) processor 310 to the RE mapping signal together with physical down link sharing channel (PDSCH) through CE from PDSCH transmitter 309.IFFT processor 310 multiplexing signals that receive and conversion are time signal through multiplexing signal.Cyclic Prefix (CP) adder 311 adds CP to the time signal.Transmitter 312 sends the signal that this adds CP.
Fig. 4 is the flow chart of explanation according to PDCCH sending method of the present invention (CE that is specially dispensing device is to the RE map operation).
With reference to figure 4, in step 401, BS is by predetermined each MS configuration PDCCH that is scheduling to.The total quantity of PDCCH depends on scheduling result.In step 403, BS disposes CE with PDCCH.Here, PDCCH comprises at least one CE.In step 405, BS presses preordering method and connects CE, and this method is not limited to specific method.BS for each BS or each subframe interweave in a different manner among the CE through connecting code element and in step 411 based on the code element of OFDM symbol mapped through interweaving to RE.
Fig. 5 is the block diagram according to PDCCH receiving system of the present invention.
With reference to figure 5, down-converter and analog to digital converter (ADC) 501 will be converted to baseband signal and analog signal will be become digital signal under radio frequency (RF) signal that antenna receives.CP removes device 502 and removes CP in the digital signal.The time signal that fast Fourier transform (FFT) processor 503 will remove CP is converted to frequency signal.After demultiplexing, in PDSCH receiver 513, press the common OFDM Data Receiving operational processes subcarrier related with PDSCH.Simultaneously, the pilot tone of through the RE of demultiplexing, extracting each antenna that pilot tone extractor 505 is mapped to from CE, and channel estimator 507 uses pilot tones to carry out channel estimating.RE uses the information that derives from Pilot PN, subframe index and OFDM symbol index that self-controller 514 receives to extract CE from RE to CE de-mapping device 506.Demodulator 508 comes demodulation CE based on the channel estimating information that receives from channel estimator 507.The pattern deinterleaving that deinterleaver 509 produces based on Pilot PN, subframe index and OFDM symbol index according to controller is through the signal of demodulation.Divide device 510 and will be divided into every PDCCH information through the CE of deinterleaving, and channel decoder 511 to 512 decoding PDCCH information.
Fig. 6 is the flow chart of explanation according to PDCCH method of reseptance of the present invention.
With reference to figure 6, in step 601, from RE, to separate mapping CE specific to the mode of BS, subframe and OFDM code element and specific mode deinterleaving that subframe is specific in step 603 according to BS.In step 605, divide CE, and in step 607, utilize the CE that divides to recover PDCCH through deinterleaving.Because a PDCCH can utilize a plurality of CE to form, and therefore should know the quantity about the CE of each PDCCH in step 607 in advance.
Understand that by above explanation the present invention advantageously maximizes the interference diversity between the BS and shines upon CE to RE or shine upon LE and provide high efficiency system to RE by interweave downlink control channel and the mode specific with BS, that subframe is specific and the OFDM code element is specific of specific with BS for the specific mode of subframe.
Though shown and described the present invention with reference to concrete example embodiment of the present invention, but it should be appreciated by those skilled in the art, under the situation that does not break away from the principle of the invention and spirit, can make various changes in form and details to it, scope of the present invention is by claims and equivalent definition thereof.

Claims (15)

1. method that is used for a plurality of physical downlink control channels (PDCCH) are mapped to resource in wireless communication system comprises:
Send in subframe if dispatch at least one PDCCH, then connect the element among the PDCCH according to predetermined scheduling scheme;
Interweave through the element of connection; And
Element map through interweaving is arrived at least one resource element (RE).
2. the method for claim 1, the step that wherein interweaves be included as each base station or for each subframe by interweave element of different side-play amounts through connecting.
3. the method for claim 1, one of them PDCCH has a plurality of control channel elements (CCE).
4. the method for claim 1, wherein mapping step comprises sequentially the element map through interweaving to RE.
5. method that is used for a plurality of physical downlink control channels (PDCCH) are mapped to resource in wireless communication system comprises:
Send in subframe if dispatch at least one PDCCH, then distribute at least one control channel element (CE) to each PDCCH according to predetermined scheduling scheme;
Connect the CE that is distributed;
Code element among the CE through connecting interweaves; And
Symbol mapped through interweaving is arrived at least one resource element (RE).
6. method as claimed in claim 5, the step that wherein interweaves are included as each base station or are that each subframe interweaves through the CE of connection by different side-play amounts.
7. method as claimed in claim 5, if wherein all RE of OFDM code element are not used for mapping, then mapping step comprises sequentially the CE through interweaving is mapped to RE.
8. method that is used for a plurality of physical downlink control channels (PDCCH) are mapped to resource in wireless communication system comprises:
Send in subframe if dispatch at least one PDCCH, then distribute at least one control channel element (CE) to each PDCCH according to predetermined scheduling scheme;
Connect the CE that is distributed;
Among the CE that is connected each is modulated at least one modulated symbol;
Modulated symbol interweaves; And
Modulated symbol through interweaving is mapped to resource element (RE).
9. method as claimed in claim 8, the step that wherein interweaves be included as each base station or for each subframe by the different side-play amounts modulated symbol that interweaves.
10. method as claimed in claim 8, wherein mapping step comprises sequentially the element map through interweaving to RE.
11. one kind is used for a plurality of physical downlink control channels (PDCCH) are mapped to the device that resource concurrence send the PDCCH of mapping in wireless communication system, comprises:
Connector is used for, and sends in subframe if dispatch at least one PDCCH according to predetermined scheduling scheme, then distributes at least one control channel element (CE) to each PDCCH, and connects the CE that is distributed;
Interleaver, the code element of the CE that is used for interweaving through connecting; And
CE is used for the symbol mapped through interweaving to RE to resource element (RE) mapper.
12. device as claimed in claim 11, wherein interleaver is used to each base station or is that each subframe interweaves through the code element of connection by different side-play amounts.
13. one kind is used for a plurality of physical downlink control channels (PDCCH) are mapped to the device that resource concurrence send the PDCCH of mapping in wireless communication system, comprises:
Connector is used for, and sends in subframe if dispatch at least one PDCCH according to predetermined scheduling scheme, then distributes at least one control channel element (CE) to each PDCCH, and connects the CE that is distributed;
Modulator, each that is used for the CE that will be connected is modulated at least one modulated symbol;
Interleaver is used to the modulated symbol that interweaves; And
CE is used for the modulated symbol through interweaving is mapped to RE to resource element (RE) mapper.
14. device as claimed in claim 1, wherein interleaver be used to each base station or for each subframe by the different side-play amounts modulated symbol that interweaves.
15. a device that is used to receive the physical downlink control channel (PDCCH) that is mapped to resource in wireless communication system comprises:
Analog to digital converter, the conversion of signals that is used for receiving through antenna is a digital signal;
Fast Fourier transform (FFT) processor is used for digital signal is converted to frequency signal;
Pilot tone extractor is used for the resource element (RE) that control channel element (CE) is mapped in the middle of the subcarrier of frequency signal and extracts pilot tone;
Channel estimator is used to use pilot tones to carry out channel estimating;
RE is used for separating mapping CE from RE to the CE de-mapping device;
Deinterleaver is used for deinterleaving through separating the CE that mapping obtains;
Demodulator is used to use the channel estimating demodulates information that receives from the channel estimator CE through deinterleaving;
Divide device, be used for the CE through demodulation is separated into many PDCCH information; And
A plurality of channel decoders, described many PDSCH information are used to decode.
CN2008800171544A 2007-03-21 2008-03-21 Method for mapping physical downlink control channel to resources and apparatus for transmitting/receiving the mapped physical downlink control channel in a wireless communication system Withdrawn - After Issue CN101682406B (en)

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