CN102256358A - Method, device and system for transmitting and receiving data - Google Patents
Method, device and system for transmitting and receiving data Download PDFInfo
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- CN102256358A CN102256358A CN2011101911997A CN201110191199A CN102256358A CN 102256358 A CN102256358 A CN 102256358A CN 2011101911997 A CN2011101911997 A CN 2011101911997A CN 201110191199 A CN201110191199 A CN 201110191199A CN 102256358 A CN102256358 A CN 102256358A
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- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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Abstract
The invention discloses a method, device and system for transmitting and receiving data, relating to a communication technology. The method comprises the following steps of: partitioning a resource block pair into at least two sub-resource block pairs, carrying out resource distribution on an E-PDCCH (Evolved-Physical Downlink Control Channel) by the sub-resource block pairs as a unit, and transmitting each data by one or a plurality of sub-resource block pairs according to the sizes of the data and the sub-resource block pairs, so as to improve the data transmission efficiency.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of transfer of data and method of reseptance, Apparatus and system.
Background technology
At Long Term Evolution (long term evolution, LTE) in the system, Physical Downlink Control Channel (physical downlink control channel, PDCCH) in each wireless sub-frame, send, and (physical downlink shared channel PDSCH) forms time division multiplexing (time division multiplexing with Physical Downlink Shared Channel, TDM) multiplexing relation, as shown in Figure 1, the control area is used to transmit PDCCH, and the data area is used to transmit PDSCH.PDCCH is by top n OFDM (the orthogonal frequency division multiplexing of a descending sub frame, OFDM) symbol sends, wherein the value of N can be 1,2,3 or 4, and N=4 only allows to appear in the system that system bandwidth is 1.4MHz.
The control area of transmission PDCCH is control channel unit (the control channel element by logical partitioning in the LTE system, CCE) constitute, wherein CCE has adopted the mode that interweaves fully to the mapping of RE (resource element, least resource unit).Downlink Control Information (downlink control information, DCI) it is unit that transmission also is based on CCE, at a subscriber equipment (user equipment, UE) a DCI can send in N continuous CCE, the possible value of N is 1,2,4 or 8 in the LTE system, is called CCE polymerization grade (Aggregation Level).
UE carries out the PDCCH blind check in the control area, whether search exists the PDCCH at its transmission, wherein, blind check is specially: wireless network temporary indentification (the radio network temporary identifier that uses this UE, RNTI) to the trial of decoding of different DCI forms and CCE polymerization grade, if decoding is correct, then determines it is DCI, and receive at this UE.In the LTE system, (discontinuous reception, DRX) descending sub frame of each in the state all needs blind check is carried out in its control area UE, search PDCCH in discontinuous reception.
Because multi-user's multiple-input and multiple-output (multi-user multiple input multiple output, MU-MIMO), coordinate multipoint (cooperative multiple points, CoMP), technology and same cell identifier (identification such as carrier aggregation, ID) wireless remote head (remote radio head, RRH), the introducing of configuration such as 8 antennas, at long-term evolution upgrading (long term evolution-advanced, LTE-A) in the system, the capacity and the efficiency of transmission of Physical Downlink Shared Channel are greatly improved; (compare as version 8-9 (release 8-9, Rel-8/9)), the performance of the Physical Downlink Control Channel of LTE-A system does not but get a promotion and with early stage LTE version.
On the one hand, in the LTE-A system, above-mentioned The application of new technique makes the PDSCH can be simultaneously for more users provide transfer of data, and this will improve the demand to the PDCCH channel capacity greatly; On the other hand, the user-specific reference signal of in PDSCH, using (user-specific reference signal, UERS) (Relay-PDCCH, R-PDCCH) etc. new technology provides governed technology and experience for the enhancing of PDCCH to the relaying PDCCH that uses and in relaying backhaul (Relay backhaul).
Limited in order to solve the down control channel capacity, and the efficiency of transmission of raising Downlink Control Information, a solution is: send the PDCCH that strengthens in the PDSCH territory when keeping original PDCCH territory in descending sub frame.
As shown in Figure 2, original PDCCH still adopts existing transmission and reception technique in the territory, use original PDCCH resource, taking top n OFDM symbol sends, wherein the possible value of N is 1,2,3,4, and N=4 only allows to appear in the system that system bandwidth is 1.4MHz, and this part PDCCH territory is called original PDCCH (legacy PDCCH) territory, adopts during as transmission to send diversity, (cell-specific reference signal CRS) adopts the blind check technology in common search space and user-specific search volume DCI to be carried out blind check based on the cell-level reference signal during reception.
More advanced transmission and reception technique can be used in the PDCCH territory that strengthens, as adopt precoding when sending, detect based on UERS during reception, taking legacy PDCCH territory running time-frequency resource in addition sends, use the part resource of original PDSCH, realize multiplexingly with the mode of PDSCH by frequency division, this part PDCCH territory is called PDCCH (Enhanced PDCCH, E-PDCCH) territory of enhancing.This Enhanced PDCCH and PDSCH realize that by the frequency division mode multiplexing scheme is called frequency division multiplexing (frequency division multiplexing, FDM) E-PDCCH.
And in FDM E-PDCCH scheme, every data in the Enhanced PDCCH territory take at least 1 Physical Resource Block to (physical resource block pair, PRB pair, abbreviate as Resource Block to) resource.With DCI is example, because on the one hand, the original bit number that each bar DCI the inside comprises is fewer, and DCI form 1C (DCI format 1C) is generally tens bits, and bigger DCI form also is no more than 60 bits as 2/2C, on the other hand, number of resources in each PRB pair is more, as shown in table 1, so carry out DCI when transmitting according to existing FDM E-PDCCH scheme, can cause frequency efficiency low excessively, thereby cause the waste of resource.
Each PRB pair of table 1 can be used for RE number (the regular circulation prefix (cyclic prefix, CP)) of E-PDCCH transmission
Summary of the invention
The embodiment of the invention provides a kind of transfer of data and method of reseptance, Apparatus and system, to improve the efficiency of transmission of data.
A kind of data transmission method comprises:
With the child resource piece to being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, described child resource piece is to being specially: to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
The transmitted over resources data of being distributed.
A kind of data receive method comprises:
Determine the resource location of pairing data, described resource comprises that at least one child resource piece is right, and described child resource piece is to being specially: to after being divided into M part, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
On described resource, receive described data.
A kind of data transmission device comprises:
Resource allocation unit, be used for the child resource piece being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, described child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2;
Transmission unit is used for the transmitted over resources data of being distributed.
A kind of data sink comprises:
Determining unit is used for determining the resource location of pairing data, and described resource comprises that at least one child resource piece is right, and described child resource piece is to being specially: to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
Receiving element is used for receiving described data on described resource.
A kind of data transmission system comprises:
Transmitting terminal, be used for the child resource piece being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, and the transmitted over resources data of being distributed, described child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2;
Receiving terminal is used for determining the resource location of pairing data, and receives described data on described resource.
The embodiment of the invention provides a kind of transfer of data and method of reseptance, Apparatus and system, by Resource Block is right to being divided at least two sub-Resource Block, and with the child resource piece to being the resource allocation that unit carries out the E-PDCCH territory, according to data and the right size of child resource piece, each data to transmission, and then improves the efficiency of transmission of data by one or more child resource pieces.
Description of drawings
Fig. 1 is the multiplexing schematic diagram that concerns of control area and data area in the descending sub frame in the prior art;
Fig. 2 is a kind of enhancing PDCCH structural representation of the prior art;
The data transmission method flow chart that Fig. 3 provides for the embodiment of the invention;
The child resource piece that Fig. 4 provides for the embodiment of the invention is to dividing schematic diagram;
The data receive method flow chart that Fig. 5 provides for the embodiment of the invention;
The data transmission device structural representation that Fig. 6 provides for the embodiment of the invention;
The data sink structural representation that Fig. 7 provides for the embodiment of the invention;
The data transmission system structural representation that Fig. 8 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of transfer of data and method of reseptance, Apparatus and system, by Resource Block is right to being divided at least two sub-Resource Block, and with the child resource piece to being the resource allocation that unit carries out the E-PDCCH territory, according to data and the right size of child resource piece, each data to transmission, and then improves the efficiency of transmission of data by one or more child resource pieces.
The embodiment of the invention provides a kind of data transmission method, and as shown in Figure 3, this method comprises:
Step S301, with the child resource piece to being the minimum resource allocation unit, be each the data allocations resource in the E-PDCCH territory, wherein, the child resource piece is to being specially: to after being divided into M part, every part of Resource Block is right to being a sub-Resource Block, M 〉=2 with each Resource Block;
Step S302, the transmitted over resources data of being distributed.
As shown in Figure 4, each PRB pair is divided into a plurality of child resource pieces to (subRB pair) according to frequency domain, when carrying out resource allocation, then can use the resource allocation unit of subRB pair as minimum, like this when transmitting short data, then do not need to expend the transmission that whole PRB pair realizes these data, only need a subRB pair can realize the transmission of these data, and for long data, also can use a plurality of subRB pair to realize transmission, because minimum resource allocation unit is littler, so still reduced the resource of this data occupancy, improved data transmission efficiency, among Fig. 4, oblique line partly is Legacy PDCCH RE (original PDCCH Resource Unit), and lattice portion is divided into UERS RE (user-specific reference signal resource unit).
For example, when these data are DCI,, when using subRB pair, can realize transmitting DCI by less resource as the resource allocation unit of minimum because the bit number that comprises is less among the DCI, and then the efficiency of transmission of raising DCI.
In embodiments of the present invention, be that DCI describes with data, DCI can be replaced with other categorical data when those skilled in the art use and use.
Like this, after the part subRB pair in a PRB pair distributed to the DCI of a receiving terminal, other subRB pair can also distribute to other user's DCI, perhaps distributes to PDSCH.
Equally, receiving terminal need be that least resource unit carries out blind check with subRB pair after receiving data, thereby obtains corresponding D CI.
Certainly, transmitting terminal also can with the child resource piece to being the minimum resource allocation unit, after each the data allocations resource in the E-PDCCH territory, the positional information of its pairing E-PDCCH resource of notice receiving terminal, like this, receiving terminal can be determined the resource location of its pairing data according to the positional information that receives, thereby does not carry out blind check or reduce the blind check number of times, thereby reduces the complexity that receiving terminal is handled.
For example, if transmitting terminal is after carrying out resource allocation, directly the shared subRB pair sign with the data of each receiving terminal correspondence sends to each receiving terminal, and each receiving terminal directly can be determined the resource location at the data place that it is corresponding according to subRB pair sign, need not to carry out blind check.If transmitting terminal is after carrying out resource allocation, the shared PRB pair sign of the data of each receiving terminal correspondence is sent to each receiving terminal, each receiving terminal directly can be determined the PRB pair at the data place that it is corresponding according to PRB pair sign, then carry out blind check in this PRB pair scope and get final product.
When PRB pair is divided, can divide according to the empirical value of size of data, also can divide according to Else Rule, for the ease of subRB pair is managed, can be according to frequency domain with each Resource Block on average being divided into M part.
Identical with the PDSCH territory, in the E-PDCCH territory, can pass through CSI-RS (channel state information reference signal, channel state information reference signals) or CRS carry out channel measurement, carry out demodulation based on UERS or CRS, if need carry out demodulation, then among each subRB pair based on UERS, include UERS RE, carry out demodulation according to UERS thereby be convenient to receiving terminal.
Generally, under conventional CP situation, comprise 12 UERS RE among each PRB pair, per 4 UERS RE are positioned on the same frequency, determine that M=3 can guarantee to include among each subRB pair 4 UERS RE; Under expansion CP situation, comprise 16 UERS RE among each PRB pair, per 4 UERS RE are positioned on the same frequency, determine that M=4 can guarantee to include among each subRB pair 4 UERS RE, determine that perhaps M=2 can guarantee to include among each subRB pair 8 UERS RE.
Conciliate timing when carrying out channel measurement by CRS in the E-PDCCH territory, owing to do not need to use UERS RE, so when PRB pair is divided, do not need to consider reference signal (referenc signal, RS) influence is as long as determine the size of subRB pair according to actual needs.
When carrying out precoding, can be that least unit is carried out precoding with subRB pair, promptly the least unit of precoding granularity is subRB pair.Such as, only be that the DCI that is transmitted has distributed a subRB pair, then in the E-PDCCH the precoding granularity of the data that pass and UERS be a subRB pair; Distributed and surpassed a subRB pair by transmitting DCI, then in the E-PDCCH the precoding granularity of the data that pass and UERS can be a subRB pair, also can be a plurality of subRB pair, but be no more than at most distribute the number of subRB pair.
But, separating timing based on UERS, for making receiving terminal to carry out channel estimating by more UERS RE, the precoding granularity of data-signal can be different with the precoding granularity of described UERS in the E-PDCCH territory, such as, the least unit of the precoding granularity of data-signal is that the child resource piece is right in the E-PDCCH territory, the least unit of the precoding granularity of UERS RE is that Resource Block is right, and the UERS between same resource block centering different user distinguishes in multi-user's multiple-input and multiple-output MU-MIMO mode.Such as, comprise 3 subPRB pair in the PRB pair, each subPRB pair distributes to a user's DCI transmission, then the precoding granularity of the transmission of DCI is 1 subRB pair in this PRB pair, the precoding granularity of UERS in the PRB pair is 1 PRB pair, if each user's UERS overlaps on running time-frequency resource, then adopt the mode of MU-MIMO to distinguish.
The embodiment of the invention also provides a kind of data receive method, and as shown in Figure 5, this method comprises:
Step S501, determine the resource location of pairing data, comprise in this resource that at least one child resource piece is right, wherein, the child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part of Resource Block is right to being a sub-Resource Block, M 〉=2;
Step S502, on determined resource, receive data.
In step S501, according to different stipulated forms, determine the resource location of pairing data, specifically comprise following three kinds:
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the resource location of pairing data according to positional information; Perhaps
According to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised is carried out blind check, and the child resource piece of determining pairing data is to the position; Perhaps
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the scope at the resource place of pairing data according to positional information, according to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised, scope at the resource place is carried out blind check, determines the resource location of pairing data.
Accordingly, the embodiment of the invention also provides a kind of data transmission device, and this device can be specially the transmitting terminal that is used to send data, as shown in Figure 6, comprises in this device:
Know the positional information of the E-PDCCH resource that it is corresponding for the ease of receiving terminal, avoid it to carry out blind check or reduce the blind check scope, also comprise in this data transmission device:
Notification unit, the positional information of its pairing E-PDCCH resource of notice receiving terminal.
The embodiment of the invention also provides a kind of data sink, and this device can be specially the receiving terminal that is used to receive data, as shown in Figure 7, comprises in this device:
Determining unit 701 is used for determining the resource location of pairing data comprising in this resource that at least one child resource piece is right, wherein, the child resource piece is to being specially: to after being divided into M part according to frequency domain, every part of Resource Block is right to being a sub-Resource Block, M 〉=2 with each Resource Block;
Receiving element 702 is used for receiving data on determined resource.
Child resource piece according to predefined pairing data is determined mode to the position, and determining unit 701 specifically is used for:
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine that according to positional information the child resource piece of pairing data is to the position; Perhaps
According to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised is carried out blind check, determines the resource location of pairing data; Perhaps
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the scope of the resource of pairing data to the place according to positional information, according to the known child resource piece that described resource comprised to number, the right number of child resource piece of perhaps supposing described resource and being comprised, scope at the resource place is carried out blind check, determines the resource location of pairing data.
The embodiment of the invention also provides a kind of data transmission system, as shown in Figure 8, comprises in this system:
Transmitting terminal 801, be used for the child resource piece being the minimum resource allocation unit, be each the data allocations resource in the E-PDCCH territory, and the transmitted over resources data of being distributed, the child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part of Resource Block is right to being a sub-Resource Block, M 〉=2;
Receiving terminal 802 is used for determining the resource location of pairing data, and receives data on determined resource.
The embodiment of the invention provides a kind of transfer of data and method of reseptance, Apparatus and system, by Resource Block is right to being divided at least two sub-Resource Block, and with the child resource piece to being the resource allocation that unit carries out the E-PDCCH territory, according to data and the right size of child resource piece, each data to transmission, and then improves the efficiency of transmission of data by one or more child resource pieces.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (15)
1. a data transmission method is characterized in that, comprising:
With the child resource piece to being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, described child resource piece is to being specially: to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
The transmitted over resources data of being distributed.
2. the method for claim 1 is characterized in that, described data are specially Downlink Control Information DCI.
3. the method for claim 1 is characterized in that, described with the child resource piece to being the minimum resource allocation unit, after each the data allocations resource in the E-PDCCH territory, also comprise:
The positional information of its pairing E-PDCCH resource of notice receiving terminal.
4. the method for claim 1 is characterized in that, described with each Resource Block to be divided into M part according to frequency domain, be specially:
According to frequency domain with each Resource Block on average being divided into M part.
5. the method for claim 1 is characterized in that, carry out signal when described E-PDCCH territory based on user-specific reference signal UERS and separate timing,
Described each child resource piece centering includes user-specific reference signal resource unit UERS RE.
6. as claim 4 or 5 described methods, it is characterized in that, under regular circulation prefix CP situation, described M=3, under expansion CP situation, described M=4 or described M=2.
7. method as claimed in claim 5 is characterized in that, when described data were carried out precoding, the data-signal in the described E-PDCCH territory was identical with the precoding granularity of described UERS, and least unit to be the child resource piece right; Perhaps
When described data are carried out precoding, the precoding granularity of data-signal is different with the precoding granularity of described UERS in the described E-PDCCH territory, the least unit of the precoding granularity of data-signal is that the child resource piece is right in the E-PDCCH territory, the least unit of the precoding granularity of described UERS is that Resource Block is right, and the UERS between same resource block centering different user distinguishes in multi-user's multiple-input and multiple-output MU-MIMO mode.
8. method as claimed in claim 4 is characterized in that, described E-PDCCH territory is carried out signal based on cell-level reference signal CRS and separated timing, and the least unit of the precoding granularity of data-signal is that the child resource piece is right in the described E-PDCCH territory.
9. a data receive method is characterized in that, comprising:
Determine the resource location of pairing data, described resource comprises that at least one child resource piece is right, and described child resource piece is to being specially: to after being divided into M part, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
On described resource, receive described data.
10. method as claimed in claim 9 is characterized in that, the described resource location of determining pairing data specifically comprises:
The positional information of the enhanced physical down control channel E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the resource location of pairing data according to described positional information; Perhaps
According to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised is carried out blind check, determines the resource location of pairing data; Perhaps
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the scope at the resource place of pairing data according to described positional information, according to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised, scope at described resource place is carried out blind check, determines the resource location of pairing data.
11. a data transmission device is characterized in that, comprising:
Resource allocation unit, be used for the child resource piece being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, described child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2;
Transmission unit is used for the transmitted over resources data of being distributed.
12. device as claimed in claim 11 is characterized in that, also comprises:
Notification unit is used to notify the positional information of its pairing E-PDCCH resource of receiving terminal.
13. a data sink is characterized in that, comprising:
Determining unit is used for determining the resource location of pairing data, and described resource comprises that at least one child resource piece is right, and described child resource piece is to being specially: to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2 with each Resource Block;
Receiving element is used for receiving described data on described resource.
14. device as claimed in claim 13 is characterized in that, described determining unit specifically is used for:
The positional information of the enhanced physical down control channel E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the resource location of pairing data according to described positional information; Perhaps
According to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised is carried out blind check, determines the resource location of pairing data; Perhaps
The positional information of the E-PDCCH resource of the correspondence that receiving end/sending end sends, and determine the scope at the resource place of pairing data according to described positional information, according to the known right number of child resource piece that described resource comprised, the right number of child resource piece of perhaps supposing described resource and being comprised, scope at described resource place is carried out blind check, determines the resource location of pairing data.
15. a data transmission system is characterized in that, comprising:
Transmitting terminal, be used for the child resource piece being the minimum resource allocation unit, be each the data allocations resource in the enhanced physical down control channel E-PDCCH territory, and the transmitted over resources data of being distributed, described child resource piece is to being specially: with each Resource Block to after being divided into M part according to frequency domain, every part is that a sub-Resource Block is right, described M 〉=2;
Receiving terminal is used for determining the resource location of pairing data, and receives described data on described resource.
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| CN2011101911997A CN102256358B (en) | 2011-07-08 | 2011-07-08 | Method, device and system for transmitting and receiving data |
| PCT/CN2012/077312 WO2013007144A1 (en) | 2011-07-08 | 2012-06-21 | Method, device and system for transmitting and receiving data |
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| CN2011101911997A CN102256358B (en) | 2011-07-08 | 2011-07-08 | Method, device and system for transmitting and receiving data |
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| WO2013097500A1 (en) * | 2011-12-31 | 2013-07-04 | 电信科学技术研究院 | Method and device for transmitting channel state information |
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