CN103220809B - A kind of sending, receiving method and related device of downlink physical control channel - Google Patents
A kind of sending, receiving method and related device of downlink physical control channel Download PDFInfo
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- CN103220809B CN103220809B CN201210018990.2A CN201210018990A CN103220809B CN 103220809 B CN103220809 B CN 103220809B CN 201210018990 A CN201210018990 A CN 201210018990A CN 103220809 B CN103220809 B CN 103220809B
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Abstract
The invention discloses a kind of sending, receiving method of downlink physical control channel and related devices.Method includes：The downlink physical control channel of the UE is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe, the Downlink Control Information of the UE and transmission is carried on the downlink physical control channel by eNodeB when sending the downlink physical control channel of UE.Sending device includes mapping block and sending module.Method of reseptance includes：When UE judges that system bandwidth is more than the first predefined bandwidth, downlink physical control channel is detected in the center frequency domain position of the system bandwidth of second time slot of subframe, the Downlink Control Information for obtaining this UE is parsed from the downlink physical control channel.The reception device includes judgment module, detection module and parsing module.The present invention substantially reduces the terminal device cost based on LTE on the basis of not influencing LTE system performance, can improve original spectrum efficiency.
Description
Technical field
The present invention relates to wireless communication fields, and in particular to a kind of sending, receiving method of downlink physical control channel and
Related device.
Background technology
Machine type communication user equipment (Machine Type Communication User Equipment, abbreviation MTC
UE), also known as M2M (Machine To Machine) user communication device, is the main application form of Internet of Things at this stage.Low work(
Consumption low cost be its can large-scale application important leverage.Currently, M2M technologies have been obtained for NEC, HP, CA, Intel, IBM,
The support of the international well-known manufacturer such as AT＆T and the approval of various countries mobile operator.The M2M equipment disposed currently on the market is main
Based on GSM (Global System of Mobile communication, global mobile communication) system.In recent years, due to
The spectrum efficiency of LTE (Long Term Evolution, long term evolution) is high, more and more mobile operator select LTE as
The evolution tendency of future broadband wireless communication system.M2M multiple types data service based on LTE also will be more attractive.Only
Accomplishing at instinct for LTE-M2M equipment is lower than the MTC terminal of gsm system, and M2M business really could go to LTE system from GSM
On.
The cost for influencing MTC UE essentially consists in Base-Band Processing and radio frequency.And it is to reduce MTC that reduction, which sends and receives bandwidth,
A kind of very effective mode of UE costs.That is the maximum of MTC UE supports transceiving band to be less than conventional traditional LTE terminal
Maximum transceiving band 20MHz (Ordinary Legacy R8/9/10 UE, abbreviation OL UE) required under single carrier wave.
The bandwidth that sends and receivees of MTC UE may be configured as the small bandwidth that the LTE systems such as 1.4MHz or 3MHz or 5MHz are supported.
Radio frames (RF, Radio Frame) in LTE system include frequency division duplex (FDD, Frequency Division
Duplex) the frame structure of pattern and time division duplex (TDD, Time Division Duplex) pattern.
As shown in Figure 1, Fig. 1 is the frame structure schematic diagram of fdd mode in existing LTE technologies.The nothing of one 10 milliseconds (ms)
Line frame by 20 length is 0.5ms, the time slot (slot) of number 0~19 form, and time slot 2i and 2i+1 forms length as 1ms's
Subframe (subframe) i.
As shown in Fig. 2, Fig. 2 is the frame structure schematic diagram of tdd mode in existing LTE technologies.The radio frames of one 10ms by
The field (half frame) of two a length of 5ms forms, and a field includes the subframe that 5 length are 1ms, and subframe i is defined as two
The time slot 2i and 2i+1 of a a length of 0.5ms.
In above two frame structure, for standard cyclic prefix (Normal CP, Normal Cyclic Prefix),
One time slot includes the symbol that 7 length are 66.7 microseconds (us), wherein the CP length of first symbol is 5.21us, remaining 6
The CP length of a symbol is 4.69us；For extended cyclic prefix (Extended CP, Extended Cyclic Prefix),
One time slot includes 6 symbols, and the CP length of all symbols is 16.67us.
Following three kinds of downlink physical control channels defined in LTE：Physical down control format instruction channel (PCFICH,
Physical Control Format Indicator Channel), physical hybrid automatic repeat request indicator channel
(PHICH, Physical Hybrid Automatic Retransmission Request Indicator Channel), object
Manage down control channel (PDCCH, Physical Downlink Control Channel).Each physical channel of downlink subframe
Time-frequency structure is as shown in Figure 3.
Wherein, PCFICH is located at first symbol of subframe, is used to refer to PDCCH control signalings and is occupied in a subframe
The number of symbol.For downlink bandwidthThe case where, control format indicates (CFI) desirable 1,2 or 3.ForDesirable 2,3 or 4, i.e. CFI+1.
PHICH is located at first symbol or first three symbol of subframe, for carrying the ACK/NACK to uplink PUSCH
Feedback information.
PDCCH controls information (DCI, Downlink Control Information) for bearing downlink, including：Upper,
Down dispatch information and uplink power control information.The number of symbols that time domain specifically occupies is indicated by PCFICH.Frequency domain position
It is mapped to whole bandwidth.
The MTC UE access LTE systems of inexpensive Bandwidth-Constrained, have some problems.Wherein most important is exactly under three kinds
Row physical control channel is total system interleaved bandwidth, and MTC UE cannot receive related control information completely because of Bandwidth-Constrained.Seriously
Influence the reception of LTE system downlink data and the transmission of MTC UE upstream datas.
It is properly received how LTE downlink transmission datas and terminal the correlations such as access for inexpensive Bandwidth-Constrained MTC UE
Problem, currently no effective solution has been proposed.
Invention content
Technical problem to be solved by the invention is to provide a kind of sending method of downlink physical control channel and send dress
It sets, a kind of transmission scheme of new downlink physical control channel is provided for LTE UE.
In order to solve the above technical problems, the present invention provides a kind of sending methods of downlink physical control channel, including：
Base station (eNodeB) is when sending the downlink physical control channel of user equipment (UE), by the downlink physical control of the UE
Channel processed is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe, is held on the downlink physical control channel
Carry the Downlink Control Information of the UE and transmission.
In order to solve the above technical problems, the present invention also provides a kind of sending device of downlink physical control channel, it is located at
ENodeB, including mapping block and sending module：
The mapping block, for when sending the downlink physical control channel of UE, the downlink physical of the UE to be controlled letter
Road is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe；
The sending module, the Downlink Control Information for carrying the UE on the downlink physical control channel are concurrent
It send.
Technical problem to be solved by the invention is to provide a kind of method of reseptance of downlink physical control channel and receive dress
It sets, a kind of reception scheme of new downlink physical control channel is provided for LTE UE.
In order to solve the above technical problems, the present invention provides a kind of method of reseptances of downlink physical control channel, including：
When UE judges that system bandwidth is more than the first predefined bandwidth, in the center frequency of the system bandwidth of second time slot of subframe
Domain position detection downlink physical control channel parses the Downlink Control Information for obtaining this UE from the downlink physical control channel,
The width of the center frequency domain is the second predefined bandwidth, and the first predefined bandwidth is more than or equal to the described second predefined band
It is wide.
In order to solve the above technical problems, the present invention also provides a kind of reception device of downlink physical control channel, it is located at
UE, including judgment module, detection module and parsing module, wherein：
The judgment module, for judging whether system bandwidth is more than the first predefined bandwidth；
The detection module is used for when the judgment module judges that system bandwidth is more than the first predefined bandwidth, in son
The center frequency domain position of the system bandwidth of second time slot of frame detects downlink physical control channel；The width of the center frequency domain is
Second predefined bandwidth, the first predefined bandwidth are more than or equal to the described second predefined bandwidth；
The parsing module, for parsing the Downlink Control Information for obtaining this UE from the downlink physical control channel.
The method and apparatus proposed by using the embodiment of the present invention are suitable for LTE UE, especially suitable for MTC UE,
This method substantially reduces the terminal device cost based on LTE on the basis of not influencing LTE system performance, can additionally solve
The problem of MTC terminal of Bandwidth-Constrained receives downlink data and is successfully accessed LTE system, promote MTC service from gsm system to
The evolution of LTE system, and original spectrum efficiency can be improved.
Description of the drawings
Fig. 1 is the frame structure schematic diagram of fdd mode in LTE；
Fig. 2 is the frame structure schematic diagram of tdd mode in LTE；
Fig. 3 is down channel subframe time-frequency structure schematic diagram in LTE；
Fig. 4 is the sides 1eNodeB of embodiment of the present invention downlink physical control channel transmission process schematic diagram；
Fig. 5 is 1 sending device structural schematic diagram of the embodiment of the present invention；
Fig. 6 is that the sides 2MTC UE of embodiment of the present invention downlink physical controls information reception process schematic diagram；
Fig. 7 is 2 reception device structural schematic diagram of the embodiment of the present invention；
Fig. 8 is using 1 downlink physical control channel sub-frame configuration schematic diagram of example；
Fig. 9 is using 2 downlink physical control channel sub-frame configuration schematic diagram of example；
Figure 10 is using 3 downlink physical control channel sub-frame configuration schematic diagram of example；
Figure 11 is using 4 downlink physical control channel sub-frame configuration schematic diagram of example；
Figure 12 is using 5 downlink physical control channel sub-frame configuration schematic diagram of example.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature mutually can arbitrarily combine.
Embodiment 1
The present embodiment describes the sending method of downlink physical control channel, as shown in figure 4, including the following steps：
Step 101, base station (eNodeB), will be under the UE when sending the downlink physical control channel of user equipment (UE)
Row physical control channel is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe；
Preferably, which includes MTC UE, is specifically as follows the MTC UE of inexpensive Bandwidth-Constrained.
Preferably, whether which first judges system bandwidth more than the when sending the downlink physical control channel of UE
One predefined bandwidth, if it is, the downlink physical control channel of UE is mapped to the system bandwidth of second time slot of subframe
Center frequency domain position；If not (being less than or equal to), then the downlink physical control channel of UE is sent according to the prior art
(PCFICH、PDCCH、PHICH).The width of above-mentioned center frequency domain is the second predefined bandwidth, and the first predefined band is wider than
In the second predefined bandwidth.The first predefined bandwidth is the maximum reception bandwidth of UE, which is under UE
Row control area bandwidth (or the system reception bandwidth of UE, i.e. UE receive the band of the frequency domain region of downlink physical control channel
It is wide), it is one section of bandwidth of the frequency centered on the centre frequency of system bandwidth.First predefined bandwidth and the second predefined bandwidth
Following manner configuration can be used：It presets or by signal deployment.Usually the second of the MTC UE of low cost Bandwidth-Constrained is predetermined
Adopted bandwidth is less than the first predefined bandwidth and is less than system bandwidth.
Preferably, which can be mapped to following time-domain position by eNodeB：Second time slot of subframe
Preceding n orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) symbol,
In, n is less than the sum of the OFDM symbol of the second time slot of the subframe.
Specifically, above-mentioned downlink physical control channel includes：At least one of PCFICH, PDCCH and PHICH；
It is preferably any one in following combination：PDCCH and PHICH；PCFICH and PDCCH；PCFICH, PDCCH and
PHICH；PDCCH；PHICH.
If including PCFICH and PDCCH, which is located at first OFDM symbol of second time slot of subframe, should
PDCCH is located at the preceding n OFDM symbol of second time slot of subframe, and specific location is configured by the PCFICH.
If including PDCCH and PHICH, i.e., when not comprising PCFICH, the time-frequency location of PDCCH, example can be pre-defined
As configured in the preceding n predefined OFDM symbols of second time slot of subframe.
When comprising PHICH, which can be located at the 1st OFDM symbol or subframe second of second time slot of subframe
Preceding 3 OFDM symbols of time slot.Preferably, the quantity of the PHICH and time domain length information by signal deployment or are preset value,
If using signal deployment, the signaling bear is on PBCH (Physical Broadcast Channel).
Preferably, the transmission mode of above-mentioned downlink physical control channel is diversity mode.
For FDD system, the control area where the downlink physical control channel is not located at subframe 0, i.e. eNodeB should
Downlink physical control channel is mapped to other one or more subframes in addition to subframe 0.
For TDD system, control area where the downlink physical control channel be not located at subframe 0, sub-frame of uplink and
Include the special subframe of DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot), i.e. eNodeB is by the downlink object
Reason control channel be mapped to except subframe 0, sub-frame of uplink and comprising the special subframe of DwPTS in addition to other one or more sons
Frame.
Step 102, eNodeB carries Downlink Control Information and the transmission of the UE on above-mentioned downlink physical control channel.
Preferably, eNodeB also sends the PDSCH (Physical of UE while sending downlink physical control channel
Downlink Shared Channel, Physical Downlink Shared Channel).Specifically：The time domain region of the PDSCH is：In subframe from
To the last one OFDM of subframe predefined OFDM symbol (k-th of OFDM symbol, k values are for preset value or by signal deployment)
Symbol removes remaining OFDM symbol after the OFDM symbol where above-mentioned channel.Preferably, if subframe includes synchronizing channel
And/or when Physical Broadcast Channel, then PDSCH is mapped in the time domain region and removes above-mentioned channel (synchronizing channel by the eNodeB
And/or PBCH) where time-domain OFDM symbol after remaining time-domain OFDM symbol.
It realizes the sending device of the above method, is located at eNodeB, as shown in figure 5, including mapping block and sending module：
The mapping block is used for when sending the downlink physical control channel of UE, by the downlink physical control channel of the UE
It is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe；
The sending module, Downlink Control Information and transmission for carrying the UE on the downlink physical control channel.
Preferably, which further includes judgment module, is used to judge whether system bandwidth to be more than the first predefined bandwidth；
The mapping block is used for when the judgment module judges that system bandwidth is more than the first predefined bandwidth, by institute
State UE downlink physical control channel be mapped to second time slot of subframe system bandwidth center frequency domain position；The center frequency
The width in domain is the second predefined bandwidth, and the first predefined bandwidth is more than or equal to the described second predefined bandwidth.
The first predefined bandwidth is the maximum reception bandwidth of UE, which is the system reception bandwidth of UE
(or downlink control area bandwidth).Above-mentioned first predefined bandwidth is using preset value or by signal deployment.Similarly, this
Two predefined bandwidth are using preset value or by signal deployment.
Preferably, which is mapped to following time-domain position by the downlink physical control channel：Subframe second
The preceding n OFDM symbol of time slot, wherein n is less than the sum of the OFDM symbol of the second time slot of the subframe.
Above-mentioned downlink physical control channel includes with one or several in lower channel：PCFICH, PDCCH and PHICH.
When downlink physical control channel includes PCFICH, which is mapped to second time slot of subframe by the PCFICH
The 1st OFDM symbol.
When downlink physical control channel includes PHICH, which is mapped to second time slot of subframe by the PHICH
Preceding 3 OFDM symbols of second time slot of the 1st OFDM symbol or subframe.
Preferably, above-mentioned sending module sends downlink physical control channel using diversity mode.
In FDD system, mapping block is for mapping downlink physical control channel in the following ways：By the downlink physical
Control channel is mapped to other one or more downlink subframes in addition to subframe 0.
In TDD system, mapping block is for mapping downlink physical control channel in the following ways：By the downlink physical
Control channel is mapped to other in addition to subframe 0, sub-frame of uplink and special subframe comprising descending pilot frequency time slot (DwPTS)
One or more downlink subframes.
Preferably, which is additionally operable to while mapping downlink physical control channel, by the PDSCH of the UE,
It is mapped to following time domain region：In subframe since predefined OFDM symbol under removing in subframe the last one OFDM symbol
Remaining OFDM symbol after OFDM symbol where row physical control channel；The sending module is additionally operable to sending downlink physical control
While channel processed, the PDSCH of UE is sent.
When subframe includes synchronizing channel and/or Physical Broadcast Channel, which is in the following ways
Map the PDSCH：It is remaining after the OFDM symbol that the PDSCH is mapped to where removing above-mentioned channel in the time domain region
OFDM symbol.
Embodiment 2
The present embodiment describes the method for reseptance of downlink physical control channel, as shown in fig. 6, including the following steps：
Step 201, UE judges whether system bandwidth is more than the first predefined bandwidth, if so, executing step 202, otherwise
Execute step 203；
Preferably, which includes MTC UE.
Step 202, center frequency domain position detection downlink physical control letters of the UE in the system bandwidth of second time slot of subframe
Road；The width of the center frequency domain is the second predefined bandwidth, which is more than or equal to the second predefined bandwidth；
First predefined bandwidth is the maximum reception bandwidth of UE, and the second predefined bandwidth is the downlink control area bandwidth of UE
(or system reception bandwidth of UE).Preferably, the first predefined bandwidth is using preset value or by signal deployment；Equally
Preset value can also be used or by signal deployment in ground, the second predefined bandwidth.
Preferably, UE detects downlink physical control channel in following time-domain position：The preceding n OFDM of second time slot of subframe
Symbol, wherein n is less than the sum of the OFDM symbol of second time slot of subframe.
The downlink physical control channel of UE detections includes with one or several in lower channel：PCFICH, PDCCH and
PHICH。
It is preferably any one in following combination：PDCCH and PHICH；PCFICH and PDCCH；PCFICH, PDCCH and
PHICH；PDCCH；PHICH.
In FDD system, UE detects downlink physical control channel in following subframe：Other or more in addition to subframe 0
A downlink subframe.
In TDD system, UE detects downlink physical control channel in following subframe：Except subframe 0, sub-frame of uplink and comprising
Other one or more downlink subframes except the special subframe of DwPTS.
Step 203, UE parses the Downlink Control Information for obtaining this UE from the downlink physical control channel.
After UE obtains Downlink Control Information, UE is received according to the instruction of the Downlink Control Information from following time domain region
PDSCH：In subframe since predefined OFDM symbol to removing the downlink physical control in subframe the last one OFDM symbol
Remaining OFDM symbol after OFDM symbol where channel processed.When subframe includes synchronizing channel and/or Physical Broadcast Channel,
UE remaining OFDM symbol reception PDSCH after the OFDM symbol where removing above-mentioned channel in the time domain region.
It realizes the reception device of the above method, is located at UE, as shown in fig. 7, comprises judgment module, detection module and parsing mould
Block, wherein：
The judgment module, for judging whether system bandwidth is more than the first predefined bandwidth；
The detection module is used for when the judgment module judges that system bandwidth is more than the first predefined bandwidth, in subframe
The center frequency domain position of the system bandwidth of second time slot detects downlink physical control channel；The width of the center frequency domain is the
Two predefined bandwidth, the first predefined bandwidth are more than or equal to the described second predefined bandwidth；
The parsing module, for parsing the Downlink Control Information for obtaining this UE from the downlink physical control channel.
As previously mentioned, the first predefined bandwidth is the maximum reception bandwidth of UE, the second predefined bandwidth is the system of UE
Reception bandwidth.Preset value can be used or by signal deployment in first predefined bandwidth.Similarly, which also may be used
Using preset value or by signal deployment.
Preferably, which is used to detect the downlink physical control channel in following time-domain position：Subframe second
The preceding n OFDM symbol of a time slot, wherein n is less than the sum of the OFDM symbol of the second time slot of the subframe.
In FDD system, the detection module detects downlink physical control channel in following subframe：Its in addition to subframe 0
His one or more downlink subframes.
In TDD system, the detection module detects downlink physical control channel in following subframe：Except subframe 0, sub-frame of uplink
And other one or more downlink subframes except the special subframe comprising descending pilot frequency time slot (DwPTS).
Preferably, which further includes PDSCH receiving modules, the downlink control letter for being resolved to according to the parsing module
The instruction of breath receives PDSCH from following time domain region：In subframe since predefined OFDM symbol to subframe the last one
Remaining OFDM symbol after the OFDM symbol where the downlink physical control channel is removed in OFDM symbol.
When subframe includes synchronizing channel and/or Physical Broadcast Channel, PDSCH receiving modules are additionally operable to：From it is described when
Remaining OFDM symbol receives the PDSCH after removing the OFDM symbol where above-mentioned channel in the region of domain.
Below by taking MTC UE as an example, above-described embodiment method is illustrated by several application examples.The MTC UE's
The predeterminable small bandwidth supported by LTE systems such as 1.4MHz or 3MHz or 5MHz of bandwidth is sended and received, or passes through high level
Signal deployment.It indicates that the channel is the channel of MTC UE by increasing " M- " before channel name in following application examples, only uses
It is not as a limitation of the invention in difference.
Using example 1
This example is said for downlink physical control channel comprising the case where M-PCFICH, M-PHICH and M-PDCCH
It is bright.In this example, system bandwidth 10MHz, and the transceiving band of MTC UE is 1.4MHz, 6 RB.
The sides eNodeB send channel procedure as shown in figure 4, first, eNodeB is judged, by system bandwidth and MTC UE
Predefined bandwidth is compared, and system bandwidth is obviously more than the predefined bandwidth of MTCUE in this example, so using Fig. 8
Shown in channel time-frequency mapping position send the low cost Bandwidth-Constrained MTC UE downlink physical control channel：
The frequency domain position of entire control area is located at 6, system bandwidth center RB, and time domain is preceding the 3 of second time slot of subframe
A OFDM symbol.Wherein：
M-PCFICH values are 2,3 or 4.For each antenna port, CFI information symbols group after coded modulation will be by
It is mapped in a manner of increasing in four resource grains subgroups of subframe second time slot, first OFDM symbol, that is, occupies 4 REG
(Resource element group, resource grains subgroup).M-PCFICH will be transmitted on the same antenna port that PBCH is used.
M-PHICH is also mapped onto first OFDM symbol or first three OFDM symbol of second time slot of subframe, specific group
The configuration informations such as number and time-domain position are included in PBCH.It is also to be mapped to and do not divide as unit of REG when mapping
In the resource grains subgroup of dispensing M-PCFICH.
M-PDCCH is mapped to the preceding 2-3 OFDM symbol of second time slot of subframe, and specific number is configured by M-PCFICH.
Time-frequency region will be according to the occupied OFDM symbol of the control channel, then removes M-PCFICH and M-PHICH is occupied
REG, remaining is the mapping area of M-PDCCH.
The M-PDSCH time-domain positions of MTC UE are since the predefined OFDM symbol of subframe to the last one OFDM of subframe
Symbol removes above-mentioned control area.Specific frequency domain position by M-PDCCH control information instructions, specifically include this frame scheduling and across
Frame scheduling two ways.When this frame scheduling of M-PDCCH, M-PDSCH frequency domain positions must be positioned at 6, system bandwidth center
RB, and it is across frame scheduling when, M-PDSCH can be located in 6 RB of system bandwidth arbitrary continuation or also be limited to system band
6, wide center RB.
Original cell special reference (Cell-specific will be avoided when above-mentioned channel mapping
Reference signals, CRS) the band of position.
The receive process of the sides MTC UE are as shown in Figure 6.After the system bandwidth in reading PBCH, terminal is first by system bandwidth
It is compared with bandwidth itself is predefined, MTC UE are detected in second time slot starting position of subframe under oneself in this example
Row control channel solves the information of M-PCFICH, M-PHICH and M-PDCCH successively.And it is read according to the DCI of M-PDCCH carryings
Take M-PDSCH.According to the uplink scheduling information of M-PDCCH carryings in respective physical transmitted over resources M-PUSCH, or predetermined
Adopted bandwidth (6 RB) transmits M-PUSCH above.
Using example 2
For downlink physical control channel, only the configuring condition comprising M-PDCCH and M-PHICH illustrates this example.This
In example, system bandwidth 20MHz, and the transceiving band of MTC UE is 1.4MHz, 6 RB.
ENodeB uses Fig. 4 flows, judges that system bandwidth is more than the predefined bandwidth of MTC UE, is configured according to judging result
The downlink physical control channel of MTC Ue.Concrete configuration situation is as shown in Figure 9：
The frequency domain position of entire control area is located at 6, system bandwidth center RB, and time domain is predetermined for second time slot of subframe
The first two OFDM symbol of justice.Wherein：
M-PHICH is mapped to first OFDM symbol of second time slot of subframe, and group number is 3, i.e. number and time domain is long
Degree is preset value.
M-PDCCH is mapped to the predefined the first two OFDM symbol of second time slot of subframe, is configured without M-PCFICH.When
Frequency domain will be according to the occupied OFDM symbol of all downlink physical control channels, then removes the occupied REG of M-PHICH, remains
Remaining resource is the mapping area of M-PDCCH.
The M-PDSCH time-domain positions of MTC UE are since the predefined OFDM symbol of subframe to the last one OFDM of subframe
Symbol removes the control area of above-mentioned downlink physical control channel.Frequency domain position is by M-PDCCH control information instructions.Including this
Frame scheduling and across frame scheduling two ways.
The band of position of original CRS will be avoided when above-mentioned channel mapping.
The receive process of the sides MTC UE are as shown in Figure 6.According to judging result, MTC UE are predefined in second time slot of subframe
The first two symbol detection downlink physical control channel of oneself.The information of M-PHICH and M-PDCCH are solved, M- is read
PDSCH.According to the uplink scheduling information of M-PDCCH carryings in respective physical transmitted over resources M-PUSCH, or just predefined
M-PUSCH is transmitted in bandwidth.
Using example 3
For downlink physical control channel, only the configuring condition comprising M-PDCCH illustrates this example.In this example, it is
Regiment commander's width is 20MHz, and the transceiving band of MTC UE is 1.4MHz, 6 RB.
ENodeB uses Fig. 4 flows, is first judged, judges that system bandwidth is more than the predefined bandwidth of MTC UE, then
Configure the downlink physical control channel of MTC UE.Concrete configuration situation is as shown in Figure 10：
The frequency domain position of entire control area is located at 6, system bandwidth center RB, and time domain is predetermined for second time slot of subframe
First three OFDM symbol of justice.Wherein：
M-PDCCH is mapped to first three predefined OFDM symbol of second time slot of subframe, is indicated without M-PCFICH.
The M-PDSCH time-domain positions of MTC UE are since the predefined OFDM symbol of subframe to the last one OFDM of subframe
Symbol removes the control area of above-mentioned M-PDCCH.Frequency domain position is by M-PDCCH control information instructions.Including this frame scheduling and across
Frame scheduling two ways.
Channel will avoid the band of position of original CRS when mapping.
The receive process of the sides MTC UE are as shown in Figure 6.According to judging result, MTC UE are detected certainly in second time slot of subframe
Oneself down control channel.Blind examination goes out the information of M-PDCCH, reads corresponding M-PDSCH.The uplink carried according to M-PDCCH
Scheduling information is in respective physical transmitted over resources M-PUSCH.Or just in predefined bandwidth transmit M-PUSCH.And M-
PUSCH uses dynamic TTI bundling, or is retransmitted using UL Grant, it is ensured that accuracy.
Using example 4
In this example, system bandwidth 1.4MHz, and the transceiving band of MTC UE is also 1.4MHz, 6 RB.
ENodeB uses Fig. 4 flows, judges system bandwidth being equal to the predefined bandwidth of MTC UE, then presses under conventional physical
The configuration method configuration MTC UE of row control channel.
The specific time-frequency mapping position of channel is as shown in figure 11：
Wherein, PCFICH values are 2,3 or 4.For each antenna port.CFI information symbol groups after coded modulation
It will be mapped in a manner of increasing in four resource grains subgroups of first OFDM symbol of subframe, occupy 4 REG (Resource
element group).PCFICH will be transmitted on the same antenna port that PBCH is used.
PHICH is also mapped onto first OFDM symbol of subframe or first three OFDM symbol, specific to organize number and time domain position
Equal configuration informations are set to be included in PBCH.It is also to be mapped to the money for being not allocated to PCFICH as unit of REG when mapping
In the particle group of source.
PDCCH is mapped to the preceding 2-4 OFDM symbol of subframe, and specific number is configured by PCFICH.Time-frequency region will basis
The occupied total OFDM symbol of downlink physical control channel, then the occupied REG of PCFICH and PHICH are removed, it is remaining
The as mapping area of PDCCH.
PDSCH time-domain positions are to remove the control area residue OFDM symbol.Specific frequency domain position is controlled by PDCCH to be believed
Breath instruction.
After the system bandwidth in reading PBCH, terminal first carries out system bandwidth and itself predefined bandwidth for the sides MTC UE
Compare, predefines bandwidth since system bandwidth is equal to MTC UE itself, then MTC UE conventionally detect physical down control
Channel processed solves the information of PCFICH, PHICH and PDCCH, and reads PDSCH according to the DCI of PDCCH carryings successively, or,
Send PUSCH.
Using example 5
The configuring condition that this example only wraps M-PHICH for downlink physical control channel illustrates.In this example, system
Bandwidth is 20MHz, and the transceiving band of MTC UE is 1.4MHz, 6 RB.
ENodeB uses Fig. 4 flows, judges that system bandwidth is more than the predefined bandwidth of MTC UE, is configured according to judging result
The downlink physical control channel of MTC Ue.Concrete configuration situation is as shown in figure 12：
The frequency domain position of entire control area is located at 6, system bandwidth center RB, and time domain is predetermined for second time slot of subframe
Preceding 1 OFDM symbol of justice.Wherein：
M-PHICH is mapped to first OFDM symbol of second time slot of subframe, and group number is 1, i.e. number and time domain is long
Degree is preset value.
The M-PDSCH time-domain positions of MTC UE are since the predefined OFDM symbol of subframe to the last one OFDM of subframe
Symbol removes above-mentioned M-PHICH mappeds RE (Resource element, resource particle).Frequency domain position is held by ePDCCH
The Downlink Control Information of load determines.Including this frame scheduling and across frame scheduling two ways.
The band of position of original CRS will be avoided when above-mentioned channel mapping.
The receive process of the sides MTC UE are as shown in Figure 6.According to judging result, MTC UE are predefined in second time slot of subframe
Previous symbol detection oneself downlink physical control channel.Solve M-PHICH information；EPDCCH is solved, is held according to ePDCCH
The Downlink Control Information (scheduling information of M-PDSCH) of load reads M-PDSCH, the Downlink Control Information carried according to ePDCCH
(uplink scheduling information), in respective physical transmitted over resources M-PUSCH, alternatively, transmitting M-PUSCH in predefined bandwidth.
Although above application example illustrates by taking MTC UE as an example, the sending method of the downlink physical control channel can also answer
For other scenes, it is applied to other type UE, is not limited in MTC UE.
The explanation that the case where above-described embodiment is only 1.4MHz to the transceiving band of small bandwidth MTC UE carries out, other transmitting-receivings
Processing procedure when bandwidth is 3MHz or 5MHz is similar, and repeats no more herein.
The present invention is on the basis of original LTE system, it is proposed that the MTC UE downlink physicals of inexpensive Bandwidth-Constrained control
The transmission method of channel, and according to this configuration, it can be ensured that small bandwidth MTC UE are successfully accessed LTE network, promote M2M industry
The quick evolution being engaged in from gsm system to LTE system.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, the form that hardware may be used in each module/unit in above-described embodiment are realized, the shape of software function module can also be used
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
Certainly, the invention may also have other embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (48)
1. a kind of sending method of downlink physical control channel, including：
Base station eNodeB reflects the downlink physical control channel of the UE when sending the downlink physical control channel of user equipment (UE)
It is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe, carries the UE's on the downlink physical control channel
Downlink Control Information is simultaneously sent.
2. the method as described in claim 1, it is characterised in that：
The UE includes machine type communication MTCUE.
3. method as claimed in claim 1 or 2, it is characterised in that：
The method further includes：The eNodeB is when sending the downlink physical control channel of UE, if judging that system bandwidth is big
In the first predefined bandwidth, then the downlink physical control channel of the UE is mapped to the system bandwidth of second time slot of subframe
The width of center frequency domain position, the center frequency domain is the second predefined bandwidth, and the first predefined bandwidth is more than or equal to institute
State the second predefined bandwidth.
4. method as claimed in claim 3, it is characterised in that：
The first predefined bandwidth is using preset value or by signal deployment；The second predefined bandwidth using preset value or
Person is by signal deployment.
5. method as claimed in claim 3, it is characterised in that：
The first predefined bandwidth is the maximum reception bandwidth of the UE, and the second predefined bandwidth is the system of the UE
Reception bandwidth.
6. method as claimed in claim 1 or 2, it is characterised in that：
The downlink physical control channel includes with one or several in lower channel：Physical down control format indicates channel
PCFICH, physical downlink control channel PDCCH and physical hybrid automatic repeat request indicator channel PHICH.
7. method as claimed in claim 6, it is characterised in that：
The time-domain position that the downlink physical control channel is mapped to is by the eNodeB：Preceding n of second time slot of subframe
Orthogonal frequency division multiplex OFDM symbol, wherein n is less than the sum of the OFDM symbol of the second time slot of the subframe.
8. method as claimed in claim 6, it is characterised in that：
When the downlink physical control channel includes PCFICH, which is mapped to second time slot of subframe by the eNodeB
The 1st OFDM symbol.
9. method as claimed in claim 6, it is characterised in that：
When the downlink physical control channel includes PHICH, which is mapped to second time slot of subframe by the eNodeB
Preceding 3 OFDM symbols of second time slot of the 1st OFDM symbol or subframe.
10. method as claimed in claim 1 or 2, it is characterised in that：
The eNodeB transmits the downlink physical control channel using diversity mode.
11. method as claimed in claim 1 or 2, it is characterised in that：
In FDD system, the eNodeB by the downlink physical control channel be mapped in addition to subframe 0 other one
A or multiple downlink subframes.
12. method as claimed in claim 1 or 2, it is characterised in that：
In TDD system, the eNodeB by the downlink physical control channel be mapped to except subframe 0, sub-frame of uplink with
And other one or more downlink subframes except the special subframe comprising descending pilot frequency time slot DwPTS.
13. method as claimed in claim 1 or 2, it is characterised in that：
The method further includes that while sending downlink physical control channel, the eNodeB also sends the physics of the UE
The PDSCH is mapped to following time domain region by DSCH Downlink Shared Channel PDSCH：In subframe since predefined OFDM symbol
Remaining OFDM symbols after to the OFDM symbol removed in subframe the last one OFDM symbol where the downlink physical control channel
Number.
14. method as claimed in claim 13, it is characterised in that：
When sending PDSCH, the method further includes, described when subframe includes synchronizing channel and/or Physical Broadcast Channel
Remaining OFDM symbols after the OFDM symbol that the PDSCH is mapped to where removing above-mentioned channel in the time domain region by eNodeB
Number.
15. a kind of method of reseptance of downlink physical control channel, including：
When user equipment (UE) judges that system bandwidth is more than the first predefined bandwidth, in the system bandwidth of second time slot of subframe
Heart frequency domain position detects downlink physical control channel, and the downlink control letter for obtaining this UE is parsed from the downlink physical control channel
The width of breath, the center frequency domain is the second predefined bandwidth, and it is predetermined that the first predefined bandwidth is more than or equal to described second
Adopted bandwidth.
16. method as claimed in claim 15, it is characterised in that：
The UE includes machine type communication MTCUE.
17. the method as described in claim 15 or 16, it is characterised in that：
The first predefined bandwidth is using preset value or by signal deployment；The second predefined bandwidth using preset value or
Person is by signal deployment.
18. the method as described in claim 15 or 16, it is characterised in that：
The first predefined bandwidth is the maximum reception bandwidth of the UE, and the second predefined bandwidth is the system of the UE
Reception bandwidth.
19. the method as described in claim 15 or 16, it is characterised in that：
The downlink physical control channel of the detection includes with one or several in lower channel：Physical down control format indicates
Channel PCFICH, physical downlink control channel PDCCH and physical hybrid automatic repeat request indicator channel PHICH.
20. method as claimed in claim 19, it is characterised in that：
The UE detects downlink physical control channel in following time-domain position：The preceding n orthogonal frequency division multiplexing of second time slot of subframe
With OFDM symbol, wherein n is less than the sum of the OFDM symbol of the second time slot of the subframe.
21. the method as described in claim 15 or 16, it is characterised in that：
In FDD system, the UE detects downlink physical control channel in following subframe：Other in addition to subframe 0
One or more downlink subframes.
22. the method as described in claim 15 or 16, it is characterised in that：
In TDD system, the UE detects downlink physical control channel in following subframe：Except subframe 0, sub-frame of uplink with
And other one or more downlink subframes except the special subframe comprising descending pilot frequency time slot DwPTS.
23. the method as described in claim 15 or 16, it is characterised in that：
After the UE obtains Downlink Control Information, the method further includes, the UE according to the instruction of the Downlink Control Information,
Physical Downlink Shared Channel PDSCH is received from following time domain region：In subframe since predefined OFDM symbol to subframe most
Remaining OFDM symbol after the OFDM symbol where the downlink physical control channel is removed in the latter OFDM symbol.
24. method as claimed in claim 23, it is characterised in that：
The method further includes：When subframe includes synchronizing channel and/or Physical Broadcast Channel, the UE is from the time domain area
Remaining OFDM symbol receives the PDSCH after removing the OFDM symbol where above-mentioned channel in domain.
25. a kind of sending device of downlink physical control channel is located at base station eNodeB, including mapping block and sending module：
The mapping block is used for when sending the downlink physical control channel of user equipment (UE), by the downlink physical control of the UE
Channel processed is mapped to the center frequency domain position of the system bandwidth of second time slot of subframe；
The sending module, Downlink Control Information and transmission for carrying the UE on the downlink physical control channel.
26. sending device as claimed in claim 25, it is characterised in that：
The UE includes machine type communication MTCUE.
27. the sending device as described in claim 25 or 26, it is characterised in that：
Described device further includes judgment module, is used to judge whether system bandwidth to be more than the first predefined bandwidth；
The mapping block is used for when the judgment module judges that system bandwidth is more than the first predefined bandwidth, by the UE
Downlink physical control channel be mapped to second time slot of subframe system bandwidth center frequency domain position；The center frequency domain
Width is the second predefined bandwidth, and the first predefined bandwidth is more than or equal to the described second predefined bandwidth.
28. sending device as claimed in claim 27, it is characterised in that：
The first predefined bandwidth is using preset value or by signal deployment；The second predefined bandwidth using preset value or
Person is by signal deployment.
29. sending device as claimed in claim 27, it is characterised in that：
The first predefined bandwidth is the maximum reception bandwidth of the UE, and the second predefined bandwidth is the system of the UE
Reception bandwidth.
30. the sending device as described in claim 25 or 26, it is characterised in that：
The downlink physical control channel includes with one or several in lower channel：Physical down control format indicates channel
PCFICH, physical downlink control channel PDCCH and physical hybrid automatic repeat request indicator channel PHICH.
31. sending device as claimed in claim 30, it is characterised in that：
The mapping block is additionally operable to the downlink physical control channel being mapped to following time-domain position：Second time slot of subframe
Preceding n OFDM symbol, wherein n be less than the second time slot of the subframe OFDM symbol sum.
32. sending device as claimed in claim 30, it is characterised in that：
The downlink physical control channel includes PCFICH, and the mapping block is used to the PCFICH being mapped to subframe second
1st OFDM symbol of time slot.
33. sending device as claimed in claim 30, it is characterised in that：
The downlink physical control channel includes PHICH, when the mapping block is used to the PHICH being mapped to subframe second
Preceding 3 OFDM symbols of second time slot of the 1st OFDM symbol or subframe of gap.
34. the sending device as described in claim 25 or 26, it is characterised in that：
The sending module is for sending the downlink physical control channel using diversity mode.
35. the sending device as described in claim 25 or 26, it is characterised in that：
In FDD system, the mapping block is for mapping downlink physical control channel in the following ways：It should
Downlink physical control channel is mapped to other one or more downlink subframes in addition to subframe 0.
36. the sending device as described in claim 25 or 26, it is characterised in that：
In TDD system, the mapping block is for mapping downlink physical control channel in the following ways：It should
Downlink physical control channel is mapped in addition to subframe 0, sub-frame of uplink and special subframe comprising descending pilot frequency time slot DwPTS
Other one or more downlink subframes.
37. the sending device as described in claim 25 or 26, it is characterised in that：
The mapping block is additionally operable to while mapping downlink physical control channel, by the Physical Downlink Shared Channel of the UE
PDSCH is mapped to following time domain region：In subframe since predefined OFDM symbol in subframe the last one OFDM symbol
Remove remaining OFDM symbol after the OFDM symbol where the downlink physical control channel；
The sending module is additionally operable to while sending downlink physical control channel, send the PDSCH of the UE.
38. sending device as claimed in claim 37, it is characterised in that：
When subframe includes synchronizing channel and/or Physical Broadcast Channel, the mapping block is for reflecting in the following ways
Penetrate the PDSCH：It is remaining after the OFDM symbol that the PDSCH is mapped to where removing above-mentioned channel in the time domain region
OFDM symbol.
39. a kind of reception device of downlink physical control channel, be located at user equipment (UE), including judgment module, detection module and
Parsing module, wherein：
The judgment module, for judging whether system bandwidth is more than the first predefined bandwidth；
The detection module, for when the judgment module judges system bandwidth more than the first predefined bandwidth, in subframe the
The center frequency domain position of the system bandwidth of two time slots detects downlink physical control channel；The width of the center frequency domain is second
Predefined bandwidth, the first predefined bandwidth are more than or equal to the described second predefined bandwidth；
The parsing module, for parsing the Downlink Control Information for obtaining this UE from the downlink physical control channel.
40. reception device as claimed in claim 39, it is characterised in that：
The UE includes machine type communication MTCUE.
41. the reception device as described in claim 39 or 40, it is characterised in that：
The first predefined bandwidth is using preset value or by signal deployment；The second predefined bandwidth using preset value or
Person is by signal deployment.
42. the reception device as described in claim 39 or 40, it is characterised in that：
The first predefined bandwidth is the maximum reception bandwidth of the UE, and the second predefined bandwidth is the system of the UE
Reception bandwidth.
43. the reception device as described in claim 39 or 40, it is characterised in that：
The downlink physical control channel includes with one or several in lower channel：Physical down control format indicates channel
PCFICH, physical downlink control channel PDCCH and physical hybrid automatic repeat request indicator channel PHICH.
44. reception device as claimed in claim 43, it is characterised in that：
The detection module is used to detect the downlink physical control channel in following time-domain position：Before second time slot of subframe
N OFDM symbol, wherein n is less than the sum of the OFDM symbol of the second time slot of the subframe.
45. the reception device as described in claim 39 or 40, it is characterised in that：
In FDD system, the detection module detects downlink physical control channel in following subframe：In addition to subframe 0
Other one or more downlink subframes.
46. the reception device as described in claim 39 or 40, it is characterised in that：
In TDD system, the detection module detects downlink physical control channel in following subframe：Except subframe 0, uplink
Other one or more downlink subframes except subframe and special subframe comprising descending pilot frequency time slot DwPTS.
47. the reception device as described in claim 39 or 40, it is characterised in that：
The UE further includes Physical Downlink Shared Channel PDSCH receiving modules, for being resolved to down according to the parsing module
The instruction of row control information, PDSCH is received from following time domain region：In subframe since predefined OFDM symbol to subframe most
Remaining OFDM symbol after the OFDM symbol where the downlink physical control channel is removed in the latter OFDM symbol.
48. reception device as claimed in claim 47, it is characterised in that：
The PDSCH receiving modules are additionally operable to：When subframe includes synchronizing channel and/or Physical Broadcast Channel, from it is described when
Remaining OFDM symbol receives the PDSCH after removing the OFDM symbol where above-mentioned channel in the region of domain.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210018990.2A CN103220809B (en) | 2012-01-20 | 2012-01-20 | A kind of sending, receiving method and related device of downlink physical control channel |
| PCT/CN2012/087373 WO2013107252A1 (en) | 2012-01-20 | 2012-12-25 | Method for sending and receiving physical downlink control channel and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210018990.2A CN103220809B (en) | 2012-01-20 | 2012-01-20 | A kind of sending, receiving method and related device of downlink physical control channel |
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| EP2928246A1 (en) * | 2012-12-03 | 2015-10-07 | Fujitsu Limited | Machine-type communication resource configuration method and device |
| CN104348579B (en) | 2013-08-05 | 2019-11-19 | 中兴通讯股份有限公司 | Down channel time-domain position determines method and apparatus |
| CN105337712B (en) * | 2014-07-30 | 2022-04-29 | 夏普株式会社 | Method for configuring physical channel start symbol, base station and user equipment |
| WO2016019553A1 (en) * | 2014-08-07 | 2016-02-11 | 华为技术有限公司 | Physical downlink data channel transmission method, base station and user equipment |
| CN105610556B (en) * | 2014-11-07 | 2019-12-31 | 中兴通讯股份有限公司 | Downlink information sending method, downlink information receiving method and device |
| CN106559203B (en) * | 2015-09-29 | 2021-06-08 | 华为技术有限公司 | Method and device for transmitting control signaling |
| US10491334B2 (en) * | 2015-10-16 | 2019-11-26 | Intel IP Corporation | Flexible universal extended frame structure |
| CN106817774B (en) * | 2015-12-01 | 2019-07-19 | 展讯通信（上海）有限公司 | Scheduling of user terminals method and device |
| CN110267352B (en) * | 2015-12-01 | 2021-09-07 | 展讯通信（上海）有限公司 | User terminal scheduling method and device |
| IL264596B (en) * | 2016-08-04 | 2022-08-01 | Ntt Docomo Inc | User terminal and radio communication method |
| CN110536270B (en) * | 2018-09-28 | 2023-09-01 | 中兴通讯股份有限公司 | Data transmitting and receiving method and device, terminal, base station and storage medium |
| CN112449424B (en) * | 2019-08-30 | 2022-09-16 | 华为技术有限公司 | Data transmission method and device |
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| CN101222272B (en) * | 2008-01-28 | 2012-10-10 | 中兴通讯股份有限公司 | Signal transmission method of physical descending control channel in descending pilot frequency time slot |
| KR101670747B1 (en) * | 2009-06-30 | 2016-10-31 | 엘지전자 주식회사 | Flexible allocation of control signal resources |
| CN101998681B (en) * | 2009-08-15 | 2014-07-09 | 华为技术有限公司 | Method for processing signaling, and base station and user equipment |
| US9258807B2 (en) * | 2010-05-03 | 2016-02-09 | Intel Deutschland Gmbh | Communication network device, communication terminal, and communication resource allocation methods |
| CN102300267A (en) * | 2011-09-28 | 2011-12-28 | 电信科学技术研究院 | Method for determining operation bandwidth of terminal and terminal |
| CN102316535B (en) * | 2011-09-30 | 2014-04-02 | 电信科学技术研究院 | Transmission method for downlink control information and equipment |
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