CN102368759A - Transmitting method and device for downlink control channel - Google Patents
Transmitting method and device for downlink control channel Download PDFInfo
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- CN102368759A CN102368759A CN2011103476798A CN201110347679A CN102368759A CN 102368759 A CN102368759 A CN 102368759A CN 2011103476798 A CN2011103476798 A CN 2011103476798A CN 201110347679 A CN201110347679 A CN 201110347679A CN 102368759 A CN102368759 A CN 102368759A
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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
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
- H04L5/0091—Signaling for the administration of the divided path
Abstract
The invention discloses a transmitting method and device for a downlink control channel. The method comprises the steps of: sending a first signalling to user equipment (UE) by a base station, and informing the UE of whether to remove partial resource elements (REs) in a control domain; and when the first signalling indicates to remove the partial REs in the control domain, mapping the downlink control channel to a physical resource by the base station according to the control domain in which the partial REs are removed, and sending to the UE. According to the invention, the demodulating performance of the UE to the downlink control channel can be increased.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of sending method and device of down control channel.
Background technology
At present, one of emphasis of advanced long-term evolution system (Long-Term Evolution advance abbreviates LTE-Advance as) is to be optimized with the focus scene indoor.Heterogeneous network (heterogeneous networks) can satisfy LTE Advance requirement well as a kind of remarkable elevator system throughput and the technology that improves the network whole efficiency.Isomerism network structure is introduced some transmitting nodes littler with respect to traditional cell base station transmitting power, comprising: Pico cell (Picocell), femtocell (Femtocells) and the relay station (Relay) that is used for signal relay.The introducing of these nodes can provide good guarantee with the covering focus scene for indoor; And the transmitting power of these nodes is little, is convenient to on-premise network neatly; Because the coverage of these nodes is little, can utilize the potential high band frequency spectrum of LTE Advanced more easily simultaneously.But the introducing of new node has changed original topology of networks, makes the presence of intercell interference of this network configuration even more serious.
The interference of minizone is generally more serious than homogenous networks (Homogeneous Network) in heterogeneous network, therefore, needs the interference coordination technique of minizone, to lower the interference of minizone.Wherein, homogenous networks mainly is meant the configuration scene of have only macro base station in the network (Evoluted Node Base station abbreviates eNB as) and subscriber equipment (User Equipment abbreviates UE as); Heterogeneous network mainly is meant the configuration scene of putting low power nodes (Low Power Node abbreviates LPN as) in the macrocell.Wherein, Low power nodes comprises: radio wideband headend (Remote radio head; Abbreviate RRH as), be used for femto base station (Pico eNB), Home eNodeB (Home eNB abbreviates HeNB as, also can be described as femto) and the via node (Relay node) etc. of the covering of hot zones.
The physical resource of Physical Downlink Control Channel among the LTE (Physical Downlink Control Channel abbreviates PDCCH as) transmission is a unit with control channel element (Control Channel Element abbreviates CCE as); The size of a CCE is 9 resource element groups (Resource Element Group; Abbreviate REG as), i.e. 36 resource elements (Resource Element abbreviates RE as); A PDCCH possibly take 1,2,4 or 8 CCE; Fig. 1 representes 2 antennas, when control domain accounts for 2 OFDM symbols, and the distribution situation of REG among each RB.
Each polymerization rank (Aggregation level) defines a search volume (Search space), comprises the search volume of public (common) search volume and subscriber equipment proprietary (UE-Specific).The common search space is that all UE will search for.The proprietary search volume of subscriber equipment is that each user is exclusive.
For strengthening the PDCCH capacity; Introduced enhanced physical down control channel (Enhanced Physical Downlink Control Channel; Abbreviate ePDCCH as), send in Physical Downlink Shared Channel (Physical Downlink Share Channel abbreviates PDSCH as) zone.
At third generation partner program (3rd Generation Partnership Project; Abbreviate 3GPP as) in 62 meetings of LTE RAN1; Confirmed that use time domain mode promptly uses almost the main means of the mode of full gap frame (Almost Blank Subframe abbreviates ABS as) as the problem of inter-cell interference that solves heterogeneous network.Almost full gap frame refers on this sub-frame, only send public reference signal (Common Reference Signal abbreviates CRS as) signal, the subframe of not sending other any signals.Promptly producing and disposing several descending sub frames in the strongly disturbing sub-district (aggressor cell) is ABS; The Cell Edge User (Cell Edge User abbreviates CEU as) that correspondence receives in the strongly disturbing sub-district (victim cell) is emission control channel and data on the ABS subframe in the subframe of corresponding aggressor cell only.Cell Edge User among the victim cell can receive very strong presence of intercell interference, and owing to be to cause the also relatively lower interference of signal power at the Serving cell edge, therefore also can be victim UE.
In order to guarantee backward compatibility, CRS will send in each subframe.Even therefore in the ABS subframe, the CRS of aggressor cell also will send, and the CRS of aggressor cell can cause serious disturbance to neighbor cell victim UE.In the LTE identical networking, aggressor cell can avoid minizone CRS to conflict each other through the different Physical Cell Identifier (Physical Cell ID abbreviates PCI as) of configuration with victim cell.But it possibly be the RE of control domain that the CRS of aggressor cell also can cause interference, this RE to the corresponding resource element (Resource Element abbreviates RE as) of neighbor cell victim UE, also possibly be the RE of data field.
When the receiver demodulation coding, if when receiving indivedual insecure data message, can be in harmonious proportion decoding and cause tangible erroneous judgement separating, make receiver performance seriously descend.Strongly disturbing certain RE of CRS that receives aggressor cell is insecure data message; Because control domain has comprised important system information and the control information that guarantees the data channel correct decoding; Be the most important condition of system's ability proper communication, therefore, if the RE of control domain receives the strongly disturbing situation of the CRS of aggressor Cell; Because the RE resource that the control signaling takies seldom; If receive the strong jamming of the CRS of aggressor Cell on certain several RE, possibly cause the failure of can not reliable reception, especially Physical Downlink Control Channel may decoding of the information of victim UE control domain; Thereby make UE can not get access to control information, and then influence the communication of UE.
Receive neighbor cell CRS to control domain and disturb the problem that causes Downlink Control Information decoding failure, effective solution is not arranged at present as yet.
Summary of the invention
Receive neighbor cell CRS to control domain and disturb the problem that causes Downlink Control Information decoding failure, the invention provides a kind of transmission and device of down control channel, to address the above problem at least.
According to an aspect of the present invention, a kind of sending method of down control channel is provided, has comprised: first signaling is sent to subscriber equipment in the base station, notifies said subscriber equipment whether to destroy the part resource element in the control domain; When the part RE in the said control domain was destroyed in the indication of said first signaling, said base station was mapped to down control channel and sends to said subscriber equipment on the physical resource according to destroying control domain behind the said part RE.
Preferably; Said base station according to the control domain after destroying down control channel is mapped to send to said subscriber equipment on the physical resource after, said method also comprises: said subscriber equipment detects said down control channel according to the control domain of destroying behind the said part RE.
Preferably, said control domain comprises: the corresponding control domain in the proprietary search volume of said subscriber equipment.
Preferably, said down control channel comprises: the down control channel that said subscriber equipment is proprietary.
Preferably, the proprietary down control channel of said subscriber equipment comprises: the Physical Downlink Control Channel of said subscriber equipment, and/or, the enhanced physical down control channel of said subscriber equipment.
Preferably, said first signaling also is used for notifying said subscriber equipment whether to destroy the part RE of data field.
Preferably, said first signaling is the transmission mode indication signaling, and the part RE in the said control domain is destroyed in indication under said transmission mode.
Preferably; Said base station according to the control domain after destroying said part RE down control channel is mapped to send to said subscriber equipment on the physical resource before; Said method also comprises: second signaling is sent to said subscriber equipment in said base station, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling.
Preferably, said second signaling is said first signaling.
Preferably, destroy under the situation of the part RE in the said control domain in said first signaling indication, said subscriber equipment calculates the time-frequency position of the said part RE that is struck off according to predefined rule.
Preferably, the frequency domain position of the said part RE that is struck off is the indicated subcarrier of one or more sub-carrier indices collection preset in the Physical Resource Block.
Preferably, said preset one or more sub-carrier indices collection comprise: (0,6), (1,7), (2,8), (3,9), (4,10) and (5,11).
Preferably, when said down control channel was Physical Downlink Control Channel, the time-domain position of the said part RE that is struck off comprised: first OFDM symbol of subframe, perhaps, first OFDM symbol of subframe and second OFDM symbol.
Preferably; When said down control channel is the enhanced physical down control channel; The time-domain position of the said part RE that is struck off comprises: first OFDM symbol of first time slot of subframe; Third from the bottom OFDM symbol of first time slot of subframe belongs to the overlapping time domain OFDM character position of OFDM symbol with ePDCCH in first OFDM symbol of second time slot of subframe and third from the bottom OFDM symbol of second time slot of subframe.
Preferably; When said down control channel is the enhanced physical down control channel; The time-domain position of the said part RE that is struck off comprises: first OFDM symbol of first time slot of subframe and second OFDM symbol of first time slot; Third from the bottom OFDM symbol of first time slot of subframe; Belong to the overlapping time domain OFDM character position of OFDM symbol with the enhanced physical down control channel in first OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot and third from the bottom OFDM symbol of second time slot of subframe.
Preferably, when the said part RE that is struck off is among the R10 during channel state information reference signals, the time-frequency position of the said part RE that is struck off is indicated by the zero energy transmitting channel state information reference signals ZeroPowerCSI-RS in the high-level signaling.
According to another aspect of the present invention, a kind of dispensing device of down control channel is provided, has comprised: first sending module, be used for sending first signaling to subscriber equipment, notify said subscriber equipment whether to destroy the part resource element in the control domain; Second sending module is used for when the part RE of said control domain is destroyed in the indication of said first signaling, down control channel is mapped to sends to said subscriber equipment on the physical resource according to destroying control domain behind the said part RE.
Preferably, said first sending module also is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling; Perhaps said device also comprises: the 3rd sending module is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling.
Through the present invention; Whether the base station destroys the part RE in the control domain through the signaling subscriber equipment; Destroy under the situation of the part RE in the control domain at needs; Control domain after destroying part RE is mapped to down control channel on the physical resource, thereby has solved the public reference signal that receives strongly disturbing sub-district and/or channel state information reference signals to the problem of the interference of UE control domain, has improved the demodulation performance of UE to down control channel.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map that distributes according to REG among each RB in the correlation technique;
Fig. 2 is the flow chart according to the sending method of the Downlink Control Information of the embodiment of the invention;
Fig. 3 is in the embodiment of the invention under the 2 antenna scenes, and when control domain accounts for 2 OFDM symbols, and when having ePDCCH, base station assigns is given the sketch map of the RE position of being struck off in 3 RB resources of UE;
Fig. 4 is in the embodiment of the invention under the 4 antenna scenes, and when control domain accounts for 3 OFDM symbols, and when having ePDCCH, base station assigns is given the sketch map of destroying the RE position in 3 RB resources of UE;
Fig. 5 is in the embodiment of the invention under the 2 antenna scenes, and control domain accounts for 2 OFDM symbols, and when having ePDCCH (different time-frequency positions), base station assigns is given the sketch map of destroying the RE position in 3 RB resources of UE;
Fig. 6 is in the embodiment of the invention under the 2 antenna scenes; Control domain accounts for 2 OFDM symbols; There is channel state information reference signals (Channel-State Information reference signals; Be called for short CSI-RS), and when having ePDCCH, base station assigns is given and is destroyed RE position (comprising the RE that CSI-RS is corresponding) sketch map in 3 RB resources of UE;
Fig. 7 is the structural representation according to the dispensing device of the Downlink Control Information of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Following examples are that example describes with the heterogeneous network system mainly, but are not limited to this, and those skilled in the art obviously can be applied in the technical scheme that the embodiment of the invention provides in the homogenous networks according to the description of the embodiment of the invention.
In embodiments of the present invention, destroy RE and be meant that this RE goes up loaded information for empty, be i.e. beared information on this RE not.
Fig. 2 is the flow chart according to the sending method of the Downlink Control Information of the embodiment of the invention, and is as shown in Figure 2, and this method comprises that mainly step S202 is to step S204.
Step S202: whether the base station destroys the part RE in the control domain through signaling UE;
In a preferred implementation of the embodiment of the invention, control domain can be the corresponding control domain in the proprietary search volume of said UE.
In a preferred implementation of the embodiment of the invention, said down control channel can be the proprietary down control channel of said UE; Wherein, the proprietary down control channel of said UE includes but not limited to: Physical Downlink Control Channel, with/or, the enhanced physical down control channel.
In embodiments of the present invention, this signaling that send the base station can have multiple representation, and the concrete embodiment of the invention is not done qualification.
In a preferred implementation of the embodiment of the invention; Whether this signaling destroys the part RE in the control domain except notice UE; Still can other functions, for example, this signaling can represent also whether the RE in PDSCH (data) territory destroys; Perhaps, can also represent that the RE in PDSCH territory and the RE of control domain destroy simultaneously.Perhaps; This signaling also can be indicated for transmission mode, is illustrated under the specific transmission pattern and destroys RE, under other transmission modes, does not destroy RE; For example; Can under specific transmission mode, destroy RE by pre-established convention between base station and the UE, then UE determines whether to destroy RE according to the transmission mode of the current indication in base station.
In a preferred implementation of the embodiment of the invention, the time-frequency position of the part RE that destroys can be through the signaling configuration, and for example, signaling is sent to UE in the base station, the time-frequency position of the said part RE that is struck off of this signaling indication; Wherein, the signaling among the step S202 can only represent whether control domain RE destroys, and the newly-increased signaling in base station is to the said time-frequency position of destroying RE of UE configuration; Perhaps, the signaling joint instructions that the time-frequency position of RE is destroyed in the signaling whether expression destroys control domain RE and expression promptly indicate whether to destroy control domain RE with a signaling and the time-frequency position of the RE that is struck off simultaneously.
Another preferred implementation in the embodiment of the invention; The time-frequency position of the RE that is struck off also can not indicated in the base station to UE; But adopt the rule of arranging to confirm the RE that is struck off with UE; UE when confirming that part RE has been destroyed in the base station, calculates the said time-frequency position of destroying RE according to the predefine rule according to the signaling of base station.
In a preferred implementation of the embodiment of the invention, when down control channel was PDCCH, above-mentioned time-domain position can be fixed as first OFDM symbol of subframe, perhaps, was fixed as first OFDM symbol and second OFDM symbol subframe of subframe; Perhaps; When down control channel is ePDCCH; Above-mentioned time-domain position can be fixed as third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of subframe second time slot belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Perhaps; When down control channel is ePDCCH; Above-mentioned time-domain position also can be fixed as third from the bottom OFDM symbol of first time slot, first OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot, third from the bottom OFDM symbol of second time slot of subframe; Perhaps; When the part RE that is struck off is among the R10 during channel state information reference signals; The time-frequency position of the part RE that can confirm to be struck off according to the indication of the zero energy transmitting channel state information reference signals (ZeroPowerCSI-RS) in the high-level signaling, promptly by in the time-frequency position of the indication of the ZeroPowerCSI-RS in the high-level signaling with the overlapping time domain OFDM symbol of ePDCCH place OFDM symbol.
And the frequency domain position of the RE that is struck off can be a Physical Resource Block sub-carriers index (0,6), (1,7), (2; 8), (3,9), (4,10); One or more in (5,11), wherein, a Physical Resource Block comprises 12 RE, and RE is numbered 0 to 11 in the Physical Resource Block.
Step S204: when the part RE in the said control domain was destroyed in the indication of above-mentioned signaling, the base station was mapped to down control channel and sends to UE on the physical resource according to destroying control domain behind the part RE.
Preferably, the part RE that destroys is the RE that the interference strength that receives surpasses pre-set threshold value.
In a preferred implementation of the embodiment of the invention; Can confirm the RE that is struck off according to the annoyance level that each RE in the control domain receives the CRS of aggressor Cell; Promptly can destroy the strongly disturbing RE of the CRS that receives aggressor Cell, the interference strength that just receives aggressor Cell surpasses the RE of predetermined value.
UE detects said down control channel according to the above-mentioned signaling in base station according to control domain after destroying part RE, obtains the control information that send the base station.
Embodiment one
In the present embodiment, the method for base station maps Downlink Control Information mainly may further comprise the steps:
Step S02, signaling b1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy, in the present embodiment, b1=1;
In the present embodiment, RE frequency domain position and time-domain position that the base station indicates UE to be struck off respectively, specific as follows:
Indicate RE (is a group-indicate with two RE) frequency domain position of being struck off with the bitmap mode; Time-domain position is configured to first OFDM symbol in the subframe through means of signaling; Or be first and second OFDM symbol in the subframe, perhaps, be third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe; With the overlapping time domain OFDM symbol of ePDCCH place OFDM symbol, perhaps, be third from the bottom OFDM symbol of first time slot in third from the bottom OFDM symbol of second time slot of subframe; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe.
For example, signaling b2b3b4b5b6b7b8=0010010 can be sent to UE in the base station, the be struck off time-frequency domain position of RE of this signaling indication UE, and wherein b2b3b4b5b6b7=001001 is used to indicate the frequency domain position (2 of destroying RE; 5,8,11); 1 expression is destroyed, and 0 expression is not destroyed, and is as shown in table 1; B8=0 is used for indication and destroys the RE time-domain position, 0 first OFDM symbol of expression, and 1 representes first and second OFDM symbol;
For the ePDCCH territory, the frequency domain position of the RE that is struck off is the position and the overlapping subcarrier of ePDCCH place subcarrier of signaling b2b3b4b5b6b7 indication; Shown in accompanying drawing 3, ePDCCH place subcarrier is (2,3,4,5,6), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3b4b5b6b7 is (2,5);
For the ePDCCH territory; Destroying the time-domain position of RE confirms for signaling b8; B8=0 representes third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; B8=1 representes third from the bottom OFDM symbol of first time slot; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Shown in accompanying drawing 3; EPDCCH place OFDM symbol is the 3rd last OFDM symbol of OFDM symbol to the second time slot of first time slot of subframe; So it is third from the bottom OFDM symbol of first time slot that ePDCCH destroys the time-domain position of RE; First OFDM symbol of second time slot of subframe, third from the bottom OFDM symbol of second time slot of subframe;
Table 1
| Signaling | Frequency domain position RE |
| b2 | |
| 0，6 | |
| b3 | 1，7 |
| |
2，8 |
| |
3，9 |
| |
4，10 |
| |
5，11 |
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 3 indicates under the 2 antenna scenes, and when control domain accounted for 2 OFDM symbols, base station assigns was given the sketch map of the RE position of being struck off among 3 RB of UE.
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol is destroyed in each Physical Resource Block in the base station;
For ePDCCH, the RE of sub-carrier indices (2,5) on third from the bottom OFDM symbol of first time slot among first RB, second first OFDM symbol of time slot and third from the bottom OFDM symbol of second time slot is destroyed in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Through above-mentioned steps, can alleviate the interference problem of the CRS of aggressor cell to a certain extent to victim UE control domain.
Embodiment two
In the present embodiment, the method for base station maps Downlink Control Information mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
In the present embodiment, RE frequency domain position and time-domain position that the base station indicates UE to be struck off respectively, specific as follows:
The RE frequency domain position of being struck off adopts the bitmap mode to indicate corresponding RE, wherein, gets rid of the RE (is a group-indicate with two RE) at this sub-district CRS place in the bitmap indicating mode; Time-domain position is configured to first OFDM symbol in the subframe through means of signaling; Perhaps be first and second OFDM symbol in the subframe, perhaps, be third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe; With the overlapping time domain OFDM symbol of ePDCCH place OFDM symbol, perhaps, be third from the bottom OFDM symbol of first time slot in third from the bottom OFDM symbol of second time slot of subframe; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe;
Specific as follows:
Get rid of the shared RE of the CRS in base station (0,3,6,9) position own; Concurrent delivering letters makes b2b3b4b5b6=01011, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE, and wherein b2b3b4b5=0101 is used to indicate the frequency domain position of destroying RE; 1 expression is destroyed, and 0 expression is not destroyed, and is as shown in table 2; B6=1 is used for indication and destroys the RE time-domain position, 0 first OFDM symbol of expression, 1 expression the 1st and the 2nd OFDM symbol.
For the ePDCCH territory, destroy position and the ePDCCH place subcarrier overlapping subcarrier of the frequency domain position of RE for signaling b2b3b4b5 indication; Shown in accompanying drawing 4, ePDCCH place subcarrier is (5,6,7,8,9), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3b4b5 is (5,8).
For the ePDCCH territory; Destroying the time-domain position of RE confirms for signaling b6; B6=0 representes third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; B6=1 representes third from the bottom OFDM symbol of first time slot; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Shown in accompanying drawing 4; EPDCCH place OFDM symbol is first last OFDM symbol of OFDM symbol to the second time slot of second time slot of subframe, is first OFDM symbol of second time slot of subframe, second OFDM symbol of second time slot and third from the bottom OFDM symbol of second time slot so ePDCCH destroys the time-domain position of RE;
Table 2
| Signaling | Frequency domain position RE index |
| b2 | 1，7 |
| |
2，8 |
| |
4，10 |
| |
5，11 |
Step S04, the RE in the proprietary search volume of UE can only be destroyed according to the mapping of the control domain after destroying PDCCH/ePDCCH in the base station.
Fig. 4 is 4 antenna scenes, when control domain accounts for 3 OFDM symbols, and the sketch map that base station assigns is struck off the RE position for 3 RB of UE.
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol of first time slot in each Physical Resource Block and second the OFDM symbol is destroyed in the base station;
For ePDCCH, the RE of sub-carrier indices (5,8) on second first OFDM symbol of time slot, second OFDM symbol and third from the bottom OFDM symbol of second time slot is destroyed among first RB in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Through present embodiment, can reduce signaling consumption.
Embodiment three
In the present embodiment, to 2 antennas or 4 antenna scenes, the mapping method that can further reduce the descending control signaling of signaling consumption is provided, in the present embodiment, this method mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
The RE frequency domain position of being struck off in the present embodiment, adopts the bitmap mode to indicate corresponding RE (is a group-indicate with 4 RE); Time-domain position is configured to first OFDM symbol in the subframe through means of signaling; Perhaps be first and second OFDM symbol in the subframe, perhaps, be third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe; With the overlapping time domain OFDM symbol of ePDCCH place OFDM symbol, perhaps, be third from the bottom OFDM symbol of first time slot in third from the bottom OFDM symbol of second time slot of subframe; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Specific as follows:
Signaling b2b3b4b5=0010 is sent in the base station, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE, and wherein b2b3b4=001 is used to indicate the frequency domain position of destroying RE, and 1 expression is destroyed, and 0 expression is not destroyed, and is as shown in table 3; B5=0 is used for indication and destroys the RE time-domain position, 0 first OFDM symbol of expression, 1 expression the 1st and the 2nd OFDM symbol.
For the ePDCCH territory, destroy position and the ePDCCH place subcarrier overlapping subcarrier of the frequency domain position of RE for signaling b2b3b4 indication; As shown in Figure 5, ePDCCH place subcarrier is (2,3,4,5,6,7,8,9,10), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3b4 is (2,5,8);
For the ePDCCH territory; Destroying the time-domain position of RE confirms for signaling b5; B5=0 representes third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; B5=1 representes third from the bottom OFDM symbol of first time slot; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; As shown in Figure 5; EPDCCH place OFDM symbol is the 4th last OFDM symbol of OFDM symbol to the second time slot of first time slot of subframe, is third from the bottom OFDM symbol of first time slot of subframe, second first OFDM symbol of time slot and third from the bottom OFDM symbol of second time slot so ePDCCH destroys the time-domain position of RE;
Table 3
| Signaling | Frequency domain position RE |
| b2 | |
| 0，3，6，9 | |
| |
1，4，7，10 |
| |
2，5，8，11 |
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 5 representes 2 antenna scenes, and control domain accounts for 2 OFDM symbols, and base station assigns is given 3 RB of UE.
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol is destroyed in each Physical Resource Block in the base station;
For ePDCCH, the RE of sub-carrier indices (2,5,8) on third from the bottom OFDM symbol of first time slot among second RB, second first OFDM symbol of time slot and third from the bottom the OFDM symbol is destroyed in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Embodiment four
In the present embodiment, if only to 2 antennas or 4 antenna scenes, the mapping method that further reduces the down control channel of signaling consumption again is provided, in the present embodiment, this method mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
In the present embodiment, frequency domain position bitmap mode is indicated corresponding RE, wherein, gets rid of the RE (is a group-indicate with 4 RE) at this sub-district CRS place in the bitmap indicating mode; Time-domain position is configured to first OFDM symbol in the subframe through means of signaling; Still for the 1st and the 2nd OFDM symbol in the subframe, perhaps, be third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe; With the overlapping time domain OFDM symbol of ePDCCH place OFDM symbol, perhaps, be third from the bottom OFDM symbol of first time slot in third from the bottom OFDM symbol of second time slot of subframe; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Specific as follows:
Get rid of the shared RE of the own CRS in base station (0,3,6; 9) position, concurrent delivering letters makes b2b3b4=010, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE; Can only destroy the RE of the proprietary search volume of subscriber equipment, wherein b2b3=01 is used to indicate the frequency domain position of destroying RE, and 1 expression is destroyed; 0 expression is not destroyed, and is as shown in table 4; B4=1 is used for indication and destroys the RE time-domain position, 0 first OFDM symbol of expression, 1 expression the 1st and the 2nd OFDM symbol.
For the ePDCCH territory, destroy position and the ePDCCH place subcarrier overlapping subcarrier of the frequency domain position of RE for signaling b2b3 indication; As shown in Figure 4, ePDCCH place subcarrier is (5,6,7,8,9), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3 is (5,8);
For the ePDCCH territory; Destroying the time-domain position of RE confirms for signaling b4; B4=0 representes third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; B4=1 representes third from the bottom OFDM symbol of first time slot; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Shown in accompanying drawing 4; EPDCCH place OFDM symbol is first last OFDM symbol of OFDM symbol to the second time slot of second time slot of subframe, is first OFDM symbol of second time slot of subframe, second OFDM symbol of second time slot and third from the bottom OFDM symbol of second time slot so ePDCCH destroys the time-domain position of RE;
Table 4
| Signaling | Frequency domain position RE |
| b2 | |
| 1，4，7，10 | |
| |
2，5，8，11 |
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 4 representes 4 antenna scenes, and when control domain accounted for 3 OFDM symbols, base station assigns was given 3 RB of UE;
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol in each Physical Resource Block and second the OFDM symbol is destroyed in the base station;
For ePDCCH, the RE of sub-carrier indices (5,8) on second first OFDM symbol of time slot, second OFDM symbol and third from the bottom OFDM symbol of second time slot is destroyed among first RB in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Embodiment five
In the present embodiment, if do not consider to destroy the RE on a plurality of subcarriers, provide a kind of base station signaled UE to destroy the processing method of the concrete time-frequency position of RE, this method mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
(1) frequency domain position and time-domain position joint instructions;
Signaling b2b3b4b5=1001 is sent in the base station, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE, and is as shown in table 5.
Table 5
| Signaling b2b3b4b5 | Frequency domain position RE index |
| 0001 | 0,6 (single antenna) |
| 0010 | 1,7 (single antenna) |
| 0011 | 2,8 (single antenna) |
| 0100 | 3,9 (single antenna) |
| 0101 | 4,10 (single antenna) |
| 0110 | 5,11 (single antenna) |
| 0111 | 0,3,6,9 (2 antennas) |
| 1000 | 1,4,7,10 (2 antennas) |
| 1001 | 2,5,8,11 (2 antennas) |
| 1010 | 0,3,6,9 (4 antennas) |
| 1011 | 1,4,7,10 (4 antennas) |
| 1100 | 2,5,8,11 (4 antennas) |
Perhaps,
(2) whether expression destroys the signaling of control domain RE and the signaling joint instructions that the time-frequency position of RE is destroyed in expression;
Signaling b2b3b4b5=1001 is sent in the base station, and above-mentioned denoting signaling informs that UE destroys RE and destroys the time-frequency domain position of RE, and is as shown in table 6.
Table 6
| Signaling b2b3b4b5 | Frequency domain position RE index | Whether destroy RE |
| 0001 | 0,6 (single antenna) | Be |
| 0010 | 1,7 (single antenna) | Be |
| 0011 | 2,8 (single antenna) | Be |
| 0100 | 3,9 (single antenna) | Be |
| 0101 | 4,10 (single antenna) | Be |
| 0110 | 5,11 (single antenna) | Be |
| 0111 | 0,3,6,9 (2 antennas) | Be |
| 1000 | 1,4,7,10 (2 antennas) | Be |
| 1001 | 2,5,8,11 (2 antennas) | Be |
| 1010 | 0,3,6,9 (4 antennas) | Be |
| 1011 | 1,4,7,10 (4 antennas) | Be |
| 1100 | 2,5,8,11 (4 antennas) | Be |
| 1101 | ?- | Not |
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 3 representes 2 antenna scenes, and when control domain accounted for 2 OFDM symbols, base station assigns was given 3 RB of UE;
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol is destroyed in the Physical Resource Block in the base station;
For ePDCCH, the RE of sub-carrier indices (2,5) on third from the bottom OFDM symbol of first time slot among first RB, second first OFDM symbol of time slot and third from the bottom OFDM symbol of second time slot is destroyed in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain;
Embodiment six
In the present embodiment, provide a kind of UE to calculate the processing method of destroying the concrete time-frequency position of RE according to the predefine rule, the main flow process of this method may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
(1) PCI and the antenna number of indication aggressor cell;
The PCI of base station transmission aggressor cell and antenna number are to UE, and be specific as follows:
Signaling b2b3b4b5b6=01101 is sent in the base station, and wherein signaling b2b3b4=011 representes the value behind the PCI mould 6 of aggressor cell, and is as shown in table 7; B5b6=01 representes the antenna number of aggressor cell, and is as shown in table 8.
Table 7
| Signaling b2b3b4 | PCI?mod?6 |
| 001 | 0 |
| 010 | 1 |
| 011 | 2 |
| 100 | 3 |
| 101 | 4 |
| 110 | 5 |
Table 8
| Signaling b5b6 | Antenna number |
| 00 | 1 |
| 01 | 2 |
| 10 | 4 |
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 3 representes 2 antenna scenes, and when control domain accounted for 2 OFDM symbols, base station assigns was given 3 RB of UE;
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol is destroyed in the Physical Resource Block in the base station;
For ePDCCH, the RE of sub-carrier indices (2,5) on third from the bottom OFDM symbol of first time slot among first RB, second first OFDM symbol of time slot and third from the bottom OFDM symbol of second time slot is destroyed in the base station;
UE calculates the concrete time-frequency position of destroying RE according to the above-mentioned signaling in base station, detects said down control channel according to destroying the back control domain;
Embodiment seven
In the present embodiment, a kind of processing method of fixedly time-domain position is provided, this method mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
In the present embodiment, only indicate frequency domain position, time-domain position is fixed.
Frequency domain position bitmap mode is indicated corresponding RE, wherein, gets rid of the RE (is a group-indicate with 4 RE) at this sub-district CRS place in the bitmap indicating mode; The PDCCH time-domain position is fixed as first OFDM symbol of subframe; Perhaps; Be fixed as first OFDM symbol of subframe and second OFDM symbol; The ePDCCH time-domain position is fixed as third from the bottom OFDM symbol of first time slot of subframe, and first OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Perhaps; Be fixed as third from the bottom OFDM symbol of first time slot, first OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe;
Get rid of the shared RE of the CRS in base station (0,3,6,9) position own, concurrent delivering letters makes b2b3=01, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE, can only destroy the RE of the proprietary search volume of subscriber equipment, and 1 expression is destroyed, and 0 expression is not destroyed, and is as shown in table 4;
For the ePDCCH territory, destroy position and the ePDCCH place subcarrier overlapping subcarrier of the frequency domain position of RE for signaling b2b3 indication; Shown in accompanying drawing 4, ePDCCH place subcarrier is (5,6,7,8,9), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3 is (5,8);
For the ePDCCH territory, be fixed as third from the bottom OFDM symbol of first time slot of subframe, first OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe;
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 4 representes 4 antenna scenes, and when control domain accounted for 3 OFDM symbols, base station assigns was given 3 RB of UE;
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol in each Physical Resource Block and second the OFDM symbol is destroyed in the base station;
For ePDCCH, the RE of sub-carrier indices (5,8) on second first OFDM symbol of time slot, second OFDM symbol and third from the bottom OFDM symbol of second time slot is destroyed among first RB in the base station;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Corresponding with the sending method of above-mentioned Downlink Control Information, the embodiment of the invention also provides a kind of dispensing device of Downlink Control Information, the sending method of the above-mentioned Downlink Control Information that this device is used to realize that the embodiment of the invention provides.
Embodiment eight
In the present embodiment, the RE to comprising among the RE that is struck off with respect to the CSI-RS position provides a kind of indicating means, and in the present embodiment, this method mainly may further comprise the steps:
Step S02, signaling b1=1 is sent in the base station, and whether above-mentioned denoting signaling allows to destroy RE, and 1 expression allows to destroy, and 0 expression does not allow to destroy;
The RE frequency domain position of being struck off in the present embodiment, adopts the bitmap mode to indicate corresponding RE (is a group-indicate with 4 RE); Time-domain position is configured to first OFDM symbol in the subframe through means of signaling; Perhaps be first and second OFDM symbol in the subframe; Perhaps; Be third from the bottom OFDM symbol of first time slot of subframe, first OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; Perhaps; Be third from the bottom OFDM symbol of first time slot, first OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom the OFDM symbol of second time slot of subframe; Specific as follows:
Signaling b2b3b4b5=0010 is sent in the base station, and above-mentioned denoting signaling informs that UE destroys the time-frequency domain position of RE, and wherein b2b3b4=001 is used to indicate the frequency domain position of destroying RE, and 1 expression is destroyed, and 0 expression is not destroyed, and is as shown in table 3; B5=0 is used for indication and destroys the RE time-domain position, 0 first OFDM symbol of expression, 1 expression the 1st and the 2nd OFDM symbol.
For the ePDCCH territory, destroy position and the ePDCCH place subcarrier overlapping subcarrier of the frequency domain position of RE for signaling b2b3b4 indication; As shown in Figure 6, ePDCCH place subcarrier is (2,3,4,5,6,7,8,9,10), and the overlapping subcarrier of frequency domain position (2,5,8,11) of indicating with b2b3b4 is (2,5,8);
For the ePDCCH territory; Destroying the time-domain position of RE confirms for signaling b5; B5=0 representes third from the bottom OFDM symbol of first time slot of subframe; First OFDM symbol of second time slot of subframe belongs to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; B5=1 representes third from the bottom OFDM symbol of first time slot; First OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot belong to the overlapping time domain OFDM symbol of OFDM symbol with ePDCCH in third from the bottom OFDM symbol of second time slot of subframe; As shown in Figure 6; EPDCCH place OFDM symbol is the 4th last OFDM symbol of OFDM symbol to the second time slot of first time slot of subframe, is third from the bottom OFDM symbol of first time slot of subframe, second first OFDM symbol of time slot and third from the bottom OFDM symbol of second time slot so ePDCCH destroys the time-domain position of RE; Destroy with respect to the RE time-frequency position of CSI-RS position and indicate through reusing the 16 bit ZeroPowerCSI-RS signalings that define in the LTE agreement;
Step S04, the base station is according to the mapping of the control domain after destroying PDCCH/ePDCCH.
Fig. 6 representes 2 antenna scenes, and control domain accounts for 2 OFDM symbols, and base station assigns is given 3 RB of UE.
For PDCCH, the RE of sub-carrier indices (2,5,8,11) on first OFDM symbol is destroyed in each Physical Resource Block in the base station;
For ePDCCH; Sub-carrier indices (2 on third from the bottom OFDM symbol of first time slot among second RB, second first OFDM symbol of time slot and third from the bottom the OFDM symbol is destroyed in the base station; 5; 8) RE, and the RE of sub-carrier indices (8,9) on last OFDM symbol of second time slot and second the time slot penult OFDM symbol;
UE detects said down control channel according to the above-mentioned signaling in base station according to destroying the back control domain.
Fig. 7 is the structural representation according to the dispensing device of the Downlink Control Information of the embodiment of the invention; As shown in Figure 7; This device mainly comprises: first sending module 10, be used for sending first signaling to subscriber equipment, and notify said subscriber equipment whether to destroy the part resource element (RE) in the control domain; Second sending module 20 is used for down control channel is mapped to sends to said subscriber equipment on the physical resource according to destroying control domain behind the said part RE.
Preferably, the part RE that is struck off is the RE that the interference strength that receives surpasses predetermined value.
In the said apparatus that the embodiment of the invention provides; Whether first sending module 10 destroys the part RE in the control domain through the signaling subscriber equipment; Destroy under the situation of the part RE in the control domain at needs; Shine upon down control channel in the control domain of second sending module 20 after destroying part RE, thereby solved the public reference signal that receives strongly disturbing sub-district problem, improved the demodulation performance of UE down control channel to the interference of UE control domain.
In a preferred implementation of the embodiment of the invention, first sending module 10 also is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling; Perhaps this device can also comprise: the 3rd sending module is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling.
In the practical implementation process, the dispensing device of this Downlink Control Information can take the described mode of the sending method of above-mentioned Downlink Control Information to indicate the time-frequency positional information of the part RE that is struck off, specifically repeats no more.
From above description, can find out, in embodiments of the present invention; Whether the base station destroys the part RE in the control domain through the signaling subscriber equipment, destroys under the situation of the part RE in the control domain at needs, in the control domain after destroying part RE down control channel is mapped on the physical resource; Thereby solved the public reference signal that receives strongly disturbing sub-district; And/or channel status indication reference signal has improved the demodulation performance of UE to down control channel to the interference of UE control domain.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. the sending method of a down control channel is characterized in that, comprising:
First signaling is sent to subscriber equipment in the base station, notifies said subscriber equipment whether to destroy the part resource element RE in the control domain;
When the part RE in the said control domain was destroyed in the indication of said first signaling, said base station was mapped to down control channel and sends to said subscriber equipment on the physical resource according to destroying control domain behind the said part RE.
2. method according to claim 1 is characterized in that, said base station according to the control domain after destroying down control channel is mapped to send to said subscriber equipment on the physical resource after, said method also comprises:
Said subscriber equipment detects said down control channel according to the control domain of destroying behind the said part RE.
3. method according to claim 1 is characterized in that, said control domain comprises: the corresponding control domain in the proprietary search volume of said subscriber equipment.
4. method according to claim 1 is characterized in that, said down control channel comprises: the down control channel that said subscriber equipment is proprietary.
5. method according to claim 4 is characterized in that, the proprietary down control channel of said subscriber equipment comprises: the Physical Downlink Control Channel of said subscriber equipment, and/or, the enhanced physical down control channel of said subscriber equipment.
6. method according to claim 1 is characterized in that, said first signaling also is used for notifying said subscriber equipment whether to destroy the part RE of data field.
7. method according to claim 1 is characterized in that, said first signaling is the transmission mode indication signaling, and the part RE in the said control domain is destroyed in indication under said transmission mode.
8. according to each described method in the claim 1 to 7, it is characterized in that, said base station according to the control domain after destroying said part RE down control channel is mapped to send to said subscriber equipment on the physical resource before, said method also comprises:
Second signaling is sent to said subscriber equipment in said base station, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling.
9. method according to claim 8 is characterized in that, said second signaling is said first signaling.
10. according to each described method in the claim 1 to 7; It is characterized in that; Destroy under the situation of the part RE in the said control domain in said first signaling indication, said subscriber equipment calculates the time-frequency position of the said part RE that is struck off according to predefined rule.
11., it is characterized in that the frequency domain position of the said part RE that is struck off is the indicated subcarrier of one or more sub-carrier indices collection preset in the Physical Resource Block according to each described method in the claim 1 to 7.
12. method according to claim 11 is characterized in that, said preset one or more sub-carrier indices collection comprise: (0,6), (1,7), (2,8), (3,9), (4,10) and (5,11).
13. according to each described method in the claim 1 to 7; It is characterized in that; When said down control channel is Physical Downlink Control Channel; The time-domain position of the said part RE that is struck off comprises: first OFDM symbol of subframe, perhaps, first OFDM symbol of subframe and second OFDM symbol.
14. according to each described method in the claim 1 to 7; It is characterized in that; When said down control channel is the enhanced physical down control channel; The time-domain position of the said part RE that is struck off comprises: first OFDM symbol of first time slot of subframe; Third from the bottom OFDM symbol of first time slot of subframe belongs to the overlapping time domain OFDM character position of OFDM symbol with ePDCCH in first OFDM symbol of second time slot of subframe and third from the bottom OFDM symbol of second time slot of subframe.
15. according to each described method in the claim 1 to 7; It is characterized in that; When said down control channel is the enhanced physical down control channel; The time-domain position of the said part RE that is struck off comprises: first OFDM symbol of first time slot of subframe and second OFDM symbol of first time slot; Third from the bottom OFDM symbol of first time slot of subframe belongs to the overlapping time domain OFDM character position of OFDM symbol with the enhanced physical down control channel in first OFDM symbol of second time slot of subframe and second OFDM symbol of second time slot and third from the bottom OFDM symbol of second time slot of subframe.
16. according to each described method in the claim 1 to 7; It is characterized in that; When the said part RE that is struck off is among the R10 during channel state information reference signals, the time-frequency position of the said part RE that is struck off is indicated by the zero energy transmitting channel state information reference signals ZeroPowerCSI-RS in the high-level signaling.
17. the dispensing device of a down control channel is characterized in that, comprising:
First sending module is used for sending first signaling to subscriber equipment, notifies said subscriber equipment whether to destroy the part resource element RE in the control domain;
Second sending module is used for when the part RE of said control domain is destroyed in the indication of said first signaling, according to destroying control domain behind the said part RE with sending to said subscriber equipment on the down control channel mapping physical resource.
18. device according to claim 17 is characterized in that,
Said first sending module also is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling; Perhaps
Said device also comprises: the 3rd sending module is used for sending second signaling to said subscriber equipment, through the time-frequency position of the said part RE that is struck off of the said subscriber equipment of said second signaling.
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