CN103220103B

CN103220103B - Enhance the transmission method and device of Physical Downlink Control Channel

Info

Publication number: CN103220103B
Application number: CN201210019880.8A
Authority: CN
Inventors: 李永; 戴博; 陈艺戬
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-01-21
Filing date: 2012-01-21
Publication date: 2018-11-09
Anticipated expiration: 2032-01-21
Also published as: CN103220103A

Abstract

The invention discloses the transmission method of ePDCCH a kind of and device, this method includes：The correspondence of the resource unit group of the predetermined number divided according to the resource in PRB pair and the antenna port of transmission ePDCCH, the ePDCCH is mapped in the corresponding resource unit group of the antenna port；Send the ePDCCH after mapping.Through the invention, the transmission performance of ePDCCH is improved, while reducing the complexity of receiving terminal detection.

Description

Enhance the transmission method and device of Physical Downlink Control Channel

Technical field

The present invention relates to the communications fields, in particular to a kind of biography of enhancing Physical Downlink Control Channel (ePDCCH) Transmission method and device.

Background technology

There are two types of frame structure, frame structure types in long term evolution (Long Term Evolution, referred to as LTE) system Type 1 is suitable for frequency division full duplex (Frequency Division Duplex, referred to as FDD) and frequency division half-duplex.Each The a length of 10ms of radio frames is made of, each time slot 0.5ms 20 time slots (slot), is numbered from 0 to 19.Wherein, a subframe (subframe) it is made of two continuous time slots, as subframe i is made of two continuous time slot 2i and 2i+1.Either half pair Work FDD or full duplex FDD, uplink and downlink are all to transmit over different frequencies, but for half-duplex FDD, UE cannot be simultaneously Send and receive data；And for full duplex FDD just without this limit, i.e., can have in every intervals 10ms 10 downlinks and 10 sub-frame of uplink.

Frame structure Type 2 is suitable for time division duplex (Time Division Duplex, referred to as TDD).One radio frames Length is 10ms, is made of the field (half-frame) that two length are 5ms.One field is 1ms subframe groups by 5 length At.The uplink downlink configuration of support is as shown in table 1, and " D " indicates that the subframe is downlink subframe in table, and " U " indicates that the subframe is Sub-frame of uplink, " S " indicate that the subframe is special subframe (special subframe).Special subframe is by downlink special subframe DwPTS, protection interval (GP) and uplink special subframe UpPTS compositions, total length 1ms.Each subframe i is by two length Time slot 2i and the 2i+1 composition of 0.5ms (15360 × Ts).

1 uplink downlink of table configures

Frame structure Type 2 supports 5ms and 10ms two kinds of downlinks-uplink change-over period.In the uplink and downlink change-over period of 5ms In, two fields have special subframe.In the uplink and downlink change-over period of 10ms, only first field has special subframe.Son 0,5 and DwPTS of frame is usually reserved for downlink transfer.Next subframe of UpPTS and and then special subframe is always reserved as Uplink.Therefore to the uplink and downlink change-over period of 5ms, UpPTS, subframe 2 and subframe 7 are reserved as uplink；To 10ms's Uplink and downlink change-over period, UpPTS, subframe 2 are reserved as uplink.

On each slot, transmitting signal can be byA subcarrier withThe resource grid of a OFDM symbol composition It is described, each element wherein on grid is known as a RE.One PRB is defined as in time domain continuouslyA OFDM It is continuous on symbol and frequency domainA subcarrier, correspond in time domain a slot with it is continuous on frequency domainA subcarrier. One PRB pair (PRB Pair) correspond in time domain a subframe with it is continuous on frequency domainA subcarrier.

Following three kinds of downlink physical control channels defined in LTE：Physical down control format indicates channel (Physical Control Format Indicator Channel, PCFICH), physical hybrid automatic repeat request indicator channel (Physical Hybrid Automatic Retransmission Request Indicator Channel, PHICH), object Manage down control channel (Physical Downlink Control Channel, PDCCH).

Wherein, the information of PCFICH carryings is used to indicate the orthogonal frequency division multiplexing that PDCCH is transmitted in a subframe The number of (OFDM, Orthogonal Frequency Division Multiplexing) symbol, at first of subframe It is sent in OFDM symbol, place frequency location is determined by system descending bandwidth and cell ID (Identity, referred to as ID).

PHICH is used to carry acknowledgement/non-acknowledgement (ACK/NACK) feedback information of uplink transmission data.PHICH Number, time-frequency location can be as Physical Broadcast Channel (the Physical Broadcast of the descending carrier where PHICH Channel, PBCH) in system message and cell ID determine.

PDCCH is for bearing downlink control information (Downlink Control Information, referred to as DCI), packet It includes：The scheduling information of Physical Uplink Shared Channel (Physical Uplink Shared Channel, referred to as PUSCH), object Manage DSCH Downlink Shared Channel (Physical Downlink Shared Channel, referred to as PDSCH) scheduling information and on Row power control information.

For FDD, when UE detects in subframe n the PDCCH channels of the scheduling information for the carrying PUSCH for belonging to the UE, or When subframe n receives the corresponding PHICH of PUSCH for belonging to the UE, according to circumstances UE will be sent the person UE on subframe n+4 The data of PUSCH.

For TDD uplink downlinks configuration 1~6, when UE detects that the carrying PUSCH scheduling for belonging to the UE is believed in subframe n The PDCCH channels of breath, alternatively, the UE is when subframe n receives the corresponding PHICH of PUSCH for belonging to the UE, according to circumstances UE will The data of PUSCH are sent on subframe n+k.For TDD uplink downlinks with setting to 0, belong to the UE's when UE is detected in subframe n The PDCCH channels of PUSCH scheduling informations are carried, and a high position for upper line index ULIndex signalings is 1 in scheduling information, or Belong to the corresponding PHICH of the PUSCH of the UE when UE is received in subframe 0 and subframe 5, and IPHICH=0, according to circumstances UE The data of PUSCH will be sent on subframe n+k.When UE detects in subframe n the scheduling information for the carrying PUSCH for belonging to the UE PDCCH channels, and the low level of UL Index signalings is 1 in scheduling information, or when UE is received in subframe 0 and subframe 5 Belong to the corresponding PHICH of the PUSCH of the UE, and IPHICH=1, according to circumstances, UE will send PUSCH on subframe n+7 Data.Above-mentioned k values, as shown in table 2：

The corresponding k values of table 2TDD configurations 0-6 illustrate table

In the version (Release, R) 8/9 of LTE system, in order to which the quality to channel measures and to reception Data symbol is demodulated, and CRS (Common Reference Signal, public reference signal) is devised.UE(User Equipment, user equipment) it can be by the measurement of CRS progress channels, to support UE to carry out cell reselection and be switched to mesh Cell is marked, and the measurement of channel quality is carried out in UE connection status.When interfering rank higher, physical layer can pass through high level Relevant Radio Link connection failure signaling disconnects.It is sharp in order to further increase the average frequency spectrum of cell in LTE R10 With the throughput of rate and the cell edge availability of frequency spectrum and each UE, two kinds of reference signals are respectively defined：Channel information is joined Examine signal (CSI-RS) and demodulated reference signal (DMRS), wherein CSI-RS is used for the measurement of channel, passes through the survey to CSI-RS Amount can calculate pre-coding matrix index that UE needs to feed back to base station eNB (Precoding Matrix Indicator, PMI), channel quality information instruction (Channel Quality Indicator, CQI) and order instruction (Rank Indicator, RI).DMRS is used for the demodulation of DSCH Downlink Shared Channel, is reduced not using the method that DMRS demodulation can utilize wave beam With the interference between receiving side and different community, and performance caused by can reducing code book granularity declines, and in certain journey Reduce the expense of descending control signaling on degree.

In LTE R8, R9 and R10, Physical Downlink Control Channel is mainly distributed on preceding the 1 of a subframe, 2 or 3 OFDM, specific distribution need to configure according to the port number of different subframe type and CRS, as shown in table 3.

3 Physical Downlink Control Channel of table is distributed

When implementation, each receiving side needs to carry out blind examination, the initial position of blind examination and control according to first three symbol of reception The element number of channel processed, it is information-related from the wireless network temporary identifications and different controls for distributing to receiving side.It generally can be with Control information is divided into publicly-owned control information and proprietary control information, publicly-owned control information is typically placed in physical down control letter The public search space in road, proprietary control information can be placed on public all spaces and dedicated search space.Receiving side is blind Determine that current subframe whether there is public system message, descending scheduling or uplink scheduling information after inspection.Due to this downlink control Information processed does not have hybrid automatic repeat-request (Hybrid Automatic Repeat reQuest, HARQ) feedback, so needing Ensure that the bit error rate of detection is as low as possible.

Consider to introduce in more user's PDSCH regions in the LTE R11 stages and emits data, most 4 configured at present The capacity of OFDM symbol may be insufficient for needing, in order to provide the control channel of economy and large capacity, it is necessary to design A kind of control channel ePDCCH of enhancing.But there is mapping methods of the ePDCCH on physical resource at present.

For having preset enhancing Physical Downlink Control Channel (ePDCCH) in the related technology, but it is not prescribed by the ePDCCH Sending method, the problem for causing the transmission performance of descending control signaling poor, currently no effective solution has been proposed.

Invention content

For having preset enhancing Physical Downlink Control Channel (ePDCCH) in the related technology, but it is not prescribed by the ePDCCH Sending method, the problem for causing the transmission performance of descending control signaling poor, the present invention provides a kind of hairs of ePDCCH Delivery method and device, at least to solve the problems, such as this.

According to an aspect of the invention, there is provided a kind of transmission method of enhancing Physical Downlink Control Channel ePDCCH, This method includes：The resource unit group of the predetermined number divided according to the resource in Physical Resource Block PRB pair and transmission The ePDCCH is mapped in the corresponding resource unit group of the antenna port by the correspondence of the antenna port of ePDCCH； Send the ePDCCH after mapping.

Preferably, the antenna port of the predetermined number resource unit group and transmission ePDCCH that are divided according to PRB pair Correspondence further includes before the ePDCCH is mapped in the corresponding resource unit group of the antenna port：

The PRB pair is divided into the resource unit group of the predetermined number one of in the following manner：

Resource in the PRB pair is continuously divided into the resource unit group of the predetermined number according to sub-carrier indices；

Resource in the PRB pair is divided into the resource unit of the predetermined number at equal intervals according to sub-carrier indices Group；

Resource in the PRB pair is divided into the resource unit group for the identical predetermined number of RE quantity for including；

The resource of the PRB pair is removed into other resources except predetermined resource, is divided into virtual resource unit group, and will The virtual resource unit group is divided into the resource unit group of predetermined number；

According to time domain orthogonal frequency division multiplex OFDM symbol, each OFDM symbol in the resource in the PRB is divided into Virtual resource unit group, and the virtual resource unit group is divided into the resource unit group of predetermined number.

Preferably, the resource of the PRB pair is removed into other resources except predetermined resource, is divided into virtual resource unit Group includes：Sequence of the other resources except the predetermined resource according to time domain after frequency domain after first time domain or first frequency domain will be removed It is ranked up；Resource after the sequence is divided into virtual resource unit group.

Preferably, according to time domain orthogonal frequency division multiplex OFDM symbol, by each OFDM symbol in the resource in the PRB Being divided into virtual resource unit group includes：The virtual resource unit group is ranked up according to the sequence of first frequency domain time domain again； Alternatively, the virtual resource unit group is ranked up according to the sequence of first time domain frequency domain again.

Preferably, the resource after the sequence is divided into virtual resource unit group includes：By the virtual resource unit Group is divided into the resource unit group of predetermined number according to sequencing or at equal intervals；Or the virtual resource unit group is handed over It knits, by the resource unit group for being divided into the predetermined number of the virtual resource unit group sequence after intertexture；

Preferably, the RE numbers that the virtual resource unit group includes are one of the following：1,2,3,4,5,6.

Preferably, according to time domain orthogonal frequency division multiplex OFDM symbol, by each OFDM in the resource in the PRB pair Symbol is divided into virtual resource unit group：When DRS quantity on the time-domain OFDM symbol is 3 or 6, by the DRS's After time-domain OFDM symbol joint, the resource in the PRB pair is divided into the virtual resource unit group.

Preferably, the correspondence is one of the following：When predetermined number is 2, the resource unit of the predetermined number Group is corresponding with the transmission antenna port 7 and 8 of ePDCCH；Alternatively, the resource unit group of the predetermined number one of is combined with following Transmission ePDCCH antenna port correspond to：7,9；8,10；7,8；9,10；When predetermined number is 4, the money of the predetermined number The antenna port 7 of set of source and transmission ePDCCH, 8,9,10 is corresponding.

Preferably, the correspondence for corresponding to different PRB pairs is identical.

Preferably, the correspondence is determined by instruction information, wherein the instruction information includes at least one of： The indexing of the PRB pair, the index of the resource unit group, cell ID, time slot index.

Preferably, the correspondence is indicated one of in the following manner：Resource unit group described in the PRB pair Index corresponded according to the sequence of index number with the index of the antenna port；

There are M antenna port of M resource group, m-th of resource unit group of k-th of PRB pair, Corresponding antenna port is (m+k) mod M；

There are M antenna port of M resource group, cell ID f, subframe is k-th of PRB pair of t M-th of resource unit group, corresponding antenna port are (x+m) mod M, wherein x is the parameter determined according to k, f, subframe t；Its In, M, k, m, f, t are the integer more than 0.

Preferably, the PRB pair is by signal deployment.

Preferably, the PRB pair is located at different positions in different subframes.

Preferably, when the multiple sets of resources unit group of ePDCCH one PRB pair of occupancy, and the ePDCCH is described more Single antenna port transmission is used in group resource unit group, is selected from the corresponding mutiple antennas port of the multiple sets of resources unit group The single antenna port of the predetermined port as transmission.

Preferably, when all resource unit groups of ePDCCH one PRB pair of occupancy, and the ePDCCH is in the institute Have and use single antenna port transmission in resource unit group, using preset port as the single antenna port of transmission, and presses The available resources in the PRB pair are determined according to the mode of the single antenna port.

According to another aspect of the present invention, a kind of transmitting device of ePDCCH is additionally provided, which includes：Map mould Block, the resource unit group of the predetermined number for being divided according to the resource in Physical Resource Block PRB pair is with transmission ePDCCH's The ePDCCH is mapped in the corresponding resource unit group of the antenna port by the correspondence of antenna port；Transmitting module, For sending the ePDCCH after mapping.

Through the invention, using the resource unit group that the resource in PRB pair is divided into predetermined number, resource is realized Rationally utilize, meanwhile, in order to reduce receiving side in the complexity for receiving ePDCCH blind Detectings, use resource unit group and antenna end The correspondence of mouth, which is mapped in the corresponding resource unit group of the antenna port so that receiving terminal is quickly found out Corresponding antenna port, and be detected, it solves and has preset enhancing Physical Downlink Control Channel (ePDCCH) in the related technology, But it is not prescribed by the sending method of the ePDCCH, the problem for causing the transmission performance of descending control signaling poor not only carries The high transmission performance of ePDCCH, while reducing the complexity of receiving terminal detection.

Description of the drawings

Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：

Fig. 1 is the flow chart of the sending method of ePDCCH according to the ... of the embodiment of the present invention；

Fig. 2 is the structure diagram of the sending device of ePDCCH according to the ... of the embodiment of the present invention；

Fig. 3 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention two；

Fig. 4 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention three；

Fig. 5 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention four；

Fig. 6 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention five；

Fig. 7 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention six；

Fig. 8 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention seven；

Fig. 9 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention eight；

Figure 10 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention nine；

Figure 11 is the schematic diagram for being continuously divided into M PRB Part by frequency domain RE according to the preferred embodiment of the present invention ten；

Figure 12 is the signal for being divided into M PRB Part at equal intervals by frequency domain RE according to the preferred embodiment of the present invention 11 Figure；

Figure 13 is the signal for being divided into M PRB Part at equal intervals by frequency domain RE according to the preferred embodiment of the present invention 12 Figure；

Figure 14 (a) is according to the preferred embodiment of the present invention 13 by the equal signal for being divided into M PRB Part of RE numbers Figure；

Figure 14 (b) is row before the available RE in the low serial number OFDM symbol according to the preferred embodiment of the present invention 13 comes RE after sequence is included in the schematic diagram of different PRB Part in turn；

Figure 14 (c) is the relation schematic diagram between RE and PRB after the sequence according to the preferred embodiment of the present invention 13；

Figure 15 (a), which is that the available RE rows in the low serial number OFDM symbol according to the preferred embodiment of the present invention 14 are preceding, to be shown It is intended to；

Figure 15 (b) is that the available RE in the low-frequency subcarrier according to the preferred embodiment of the present invention 14 arranges preceding signal Figure；

Figure 15 (c) is the schematic diagram of the RE compositions eREG after the sequence according to the preferred embodiment of the present invention 14；

Figure 15 (d) is divided into according to tandem or at equal intervals according to the eREG of the preferred embodiment of the present invention 14 The schematic diagram of PRBPart；

Figure 15 (e) is to be divided into showing for PRB Part according to tandem according to the eREG of the preferred embodiment of the present invention 14 It is intended to；

Figure 16 (a), which is that the available RE rows in the low serial number OFDM symbol according to the preferred embodiment of the present invention 15 are preceding, to be shown It is intended to；

Figure 16 (b) is the schematic diagram of the RE compositions eREG after the sequence according to the preferred embodiment of the present invention 15；

Figure 16 (c) is the schematic diagram to be interweaved according to the eREG of the preferred embodiment of the present invention 15；

Figure 16 (d) is the schematic diagram that PRB Part are partitioned into according to the eREG sequences of the preferred embodiment of the present invention 15；

Figure 17 (a) is the schematic diagram that RE forms eREG in 1 PRB pair according to the preferred embodiment of the present invention 16；

Figure 17 (b) is continuous 4 in an OFDM symbol according to the preferred embodiment of the present invention 16 adjacent available RE Form the schematic diagram of an eREG；

Figure 18 (a) is the schematic diagram that RE forms eREG in a PRB Pair according to the preferred embodiment of the present invention 17；

Figure 18 (b) is continuous 4 in the OFDM symbol without DRS (DMRS) according to the preferred embodiment of the present invention 17 Adjacent available RE forms the schematic diagram of an eREG；

Figure 18 (c) is 4 comprising the DRS OFDM symbol joint according to the preferred embodiment of the present invention 17, can use RE Form the schematic diagram of an eREG；

Figure 19 (a) is the schematic diagram that RE forms eREG in a PRB Pair according to the preferred embodiment of the present invention 18；

Figure 19 (b) is continuous 4 in the OFDM symbol without DRS (DMRS) according to the preferred embodiment of the present invention 18 Adjacent available RE forms the schematic diagram of an eREG；

Figure 19 (c) is in the OFDM symbol comprising DRS according to the preferred embodiment of the present invention 18 per adjacent two OFDM symbol constitutes jointly one group of OFDM symbol, by showing for 4 available RE one eREG of composition adjacent in one group of OFDM symbol It is intended to；

Figure 20 (a) is that RE forms eREG in a PRB Pair according to the preferred embodiment of the present invention 19, wherein one It include the schematic diagram of 2 RE in eREG；

Figure 20 (b) is continuous 2 in the OFDM symbol without DRS (DMRS) according to the preferred embodiment of the present invention 19 Adjacent available RE forms the schematic diagram of an eREG；

Figure 20 (c) is in the OFDM symbol comprising DRS according to the preferred embodiment of the present invention 19 per adjacent two OFDM symbol constitutes jointly one group of OFDM symbol, by showing for 2 available RE one eREG of composition adjacent in one group of OFDM symbol It is intended to；

Figure 21 (a) is the schematic diagram that RE forms eREG in a PRB Pair according to the preferred embodiment of the present invention 20；

Figure 21 (b) is continuous 2 in the OFDM symbol without DRS (DMRS) according to the preferred embodiment of the present invention 20 Adjacent available RE forms the schematic diagram of an eREG；

Figure 21 (c) is in the OFDM symbol comprising DRS according to the preferred embodiment of the present invention 20 per adjacent two OFDM symbol constitutes jointly one group of OFDM symbol, by showing for 2 available RE one eREG of composition adjacent in one group of OFDM symbol It is intended to；

Figure 22 is the schematic diagram that PRB Pair are divided into M PRB Part according to the preferred embodiment of the present invention 21；

Figure 23 (a) is before the available RE in the low serial number OFDM symbol according to the preferred embodiment of the present invention 22 comes, RE after sequence is included in the schematic diagram in different PRB Part in turn；

Figure 23 (b) is sequence before the available RE in the low-frequency subcarrier according to the preferred embodiment of the present invention 22 comes RE afterwards is included in the schematic diagram in different PRB Part in turn；

Figure 23 (c) is the schematic diagram of the RE compositions eREG after the sequence according to the preferred embodiment of the present invention 22；And

Figure 23 (d) is the schematic diagram that PRB Part are divided into according to the eREG of the preferred embodiment of the present invention 22.

Specific implementation mode

Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.

A kind of sending method of ePDCCH is present embodiments provided, Fig. 1 is the hair of ePDCCH according to the ... of the embodiment of the present invention The flow chart of delivery method, as shown in Figure 1, this method includes following step S102 and step S104.

Step S102：The resource unit group of the predetermined number divided according to the internal resource of Physical Resource Block (PRB) with The correspondence for transmitting the antenna port of ePDCCH, which is mapped in the corresponding resource unit group of the antenna port.

Step S104：Send the ePDCCH after mapping.

Through the above steps, the resource in PRB pair is divided into the resource unit group of predetermined number, realizes the conjunction of resource Reason utilizes, meanwhile, in order to reduce receiving side in the complexity for receiving ePDCCH blind Detectings, use resource unit group and antenna port Correspondence, which is mapped in the corresponding resource unit group of the antenna port so that receiving terminal is quickly found out pair The antenna port answered, and be detected, it overcomes and has preset enhancing Physical Downlink Control Channel (ePDCCH) in the related technology, but It is the sending method for being not prescribed by ePDCCH, the problem for causing the transmission performance of descending control signaling poor not only increases The transmission performance of ePDCCH, while reducing the complexity of receiving terminal detection.

It, can be according to one of following manner by the PRB pair before ePDCCH is mapped to resource unit group when implementing It is divided into the resource unit group of the predetermined number.

Mode one：Resource in the PRB pair is continuously divided into the resource unit of the predetermined number according to sub-carrier indices Group.

Which is a kind of method of salary distribution of centralization, and which can obtain frequency selectivity gain.

Mode two：Resource in the PRB pair is divided into the resource list of the predetermined number at equal intervals according to sub-carrier indices Tuple.

Which is a kind of distributed allocation, can obtain the gain of frequency diversity, and the complexity of which is relatively low, Receiving terminal can be easy to calculate the Data Position of detection.

Mode three：Resource in the PRB pair is divided into the resource unit group for the identical predetermined number of RE quantity for including.

The method of salary distribution complexity is relatively low.Such as：When distributing resource to ePDCCH, it is only necessary to know divided resource group Number can obtain the size of distribution resource, the difference without going contained RE numbers in consideration different resource group again.

Mode four：The resource of the PRB pair is removed into other resources except predetermined resource, is divided into virtual resource unit Group, and the virtual resource unit group is divided into the resource unit group of predetermined number.

Implement when, in emission process, exist and need to carry out data into precoding as unit of group, as SFBC, STBC, SFBC+STBC, open-loop precoding diversity etc., and the data after precoding need to be placed on the RE of adjacent position, or be So that it is as identical as possible with the channel coefficients on the RE in group, or in order to obtain the diversity of open-loop precoding.So should Resource in PRB pair removes predetermined resource, is then divided into virtual resource unit group.Improve the accuracy of resource division.

Mode five：According to time domain orthogonal frequency division multiplex OFDM symbol, each OFDM symbol in the resource in the PRB is drawn It is divided into virtual resource unit group, and the virtual resource unit group is divided into the resource unit group of predetermined number.

Which carries out the division of virtual resource unit group according to OFDM symbol, reduces the complexity of division.

Preferably, in aforesaid way four and mode five, the resource of the PRB pair can be removed in the following manner predetermined Other resources except resource, are divided into virtual resource unit group：Other resources except the predetermined resource will be removed according to elder generation The sequence of time domain is ranked up after frequency domain or first frequency domain after time domain；Resource after the sequence is divided into virtual resource unit Group.Then resource after sequence is divided into void by which using remaining resource to be ranked up according to time domain or frequency domain Quasi- resource unit group, improves the reasonability of resource division.

Than preferably, can the resource after the sequence be divided into virtual resource unit group in the following manner：By the void Quasi- resource unit group is divided into the resource unit group of predetermined number according to sequencing；At equal intervals by the virtual resource unit group, It is divided into the resource unit group of predetermined number.Which is more simple and easy to do.

In the above method, virtual resource unit group may include one or more RE.Than preferably, including RE numbers It is one of the following：1,2,3,4.The dividing mode can use the scheme of a variety of transmitting diversity precodings.

During stating mode five on the implementation, when DRS quantity on the time-domain OFDM symbol is 3 or 6, can will include The time-domain OFDM symbol of the DRS combines the resource in the PRB pair and is divided into the virtual resource unit group.

It is remaining after removing DRS expenses in a PRB pair in the OFDM symbol comprising DRS in the implementation of which five Under the number of RE may be odd number, for example, in the case of Normal CP, only use antenna port 7 and 8, then have 3 RE Expense in terms of for DRS is left 9 RE and can be used for ePDCCH transmission, if the number of RE is 2 in virtual resource group, It can cause be allocated there are one RE；Or remaining RE numbers are not 4 integral multiples after DRS expenses, such as In the case of Normal CP, using antenna port 7,8,9,10, then there is expenses of 6 RE for DRS, remaining 6 can use In the transmission of ePDCCH, if the number of RE is 4 in virtual resource group, just having 2 RE cannot be allocated.This is preferably Multiple OFDM symbols containing DRS are joined together to be divided into virtual resource unit group, be carried by embodiment in a PRB pair The high utilization rate of resource.

When implementing, can be transmitted according to one of following correspondence selection antenna port.

(1) when predetermined number is 2, resource unit group and the antenna port 7 of transmission ePDCCH and 8 pairs of the predetermined number It answers；Alternatively, the resource unit group of the predetermined number and the antenna port of the following transmission ePDCCH one of combined are corresponding：7,9；8, 10；7,8；9,10.

When predetermined number is 2 to be, the DRS on antenna port 7,8 carries out code division multiplexing using identical RE, antenna port 9, DRS on 10 carries out code division multiplexing using identical RE, and the DRS of multiple ports, the DRS meetings of each port are emitted on identical RE Get the sum of part of entire RE power, that is, each port DRS power equal to the general power on used RE；Work as M=2 When, a kind of simple antenna port is configured to M resource group and is corresponded with antenna port { 7,8 }；Sometimes with the multiplexing of cell DRS interference between antenna port on identical RE can be stronger, in order to avoid the adverse effect that this interference fringe comes, simultaneously The transmission power of antenna port is improved, can not be multiplexed on identical RE with the antenna port DRS of cell by row, such as M money Source group and one group of correspondence in antenna port { 7,9 } and { 8,10 }；Sometimes the interference between neighboring community is stronger, can configure dry The DRS of strong cell is disturbed not on identical RE, such as one group pair in the M resource group and antenna port { 7,8 } and { 9,10 } It answers.

(2) when predetermined number is 4, the antenna port 7 of the resource unit group and transmission ePDCCH of the predetermined number, 8,9, 10 is corresponding.

It is equal with the antenna port number that can be provided in PRB pair when predetermined number is 4, use the money of predetermined number Source group and antenna port { 7,8,9,10 } one-to-one method, receiving side can easily find the antenna port of oneself, drop The complexity of low antenna port detection.

When implementing, in order to reduce the complexity of configuration and reception, correspond to the correspondence phase of different PRB pairs Together.

Preferably, above-mentioned correspondence is indicated by the instruction information of following one：The index of the PRB pair, the money Index, cell ID, the time slot index of set of source.The antenna of resource unit group and transmission ePDCCH in the preferred embodiment Port correspondence is determined by instruction information, can accomplish flexible configuration, and antenna port DRS interference is random between playing cell Change, the effect of diversity gain is obtained using the channel estimation that DRS is carried out.

Than preferably, which is indicated one of in the following manner：

Mode one：The index of resource unit group and the index of antenna port are corresponded according to the sequence of index number；

Mode two：There are M antenna port of M resource group, m-th of resource list of k-th of PRB pair Tuple, corresponding antenna port are (m+k) mod M；

Mode three：There are M antenna port of M resource group, cell ID f, subframe is k-th of t M-th of resource unit group of PRB pair, corresponding antenna port are (x+m) mod M, wherein x is the f according to k, what subframe t was determined Parameter；

Wherein, M, k, m, f, t are the integer more than 0.

The correspondence of mode one is simple, and complexity is low；The channel that mode two may be implemented to be randomized in each resource group is estimated Meter, obtains the diversity gain of channel estimation；Antenna port DRS interference randomizations between cell may be implemented in mode three, utilize DRS The channel estimation of progress obtains the effect of diversity gain.

In implementation process, which can be located at different positions in different subframes.In the preferred embodiment PRB pair with subframe change and change, interference randomization can be played, obtain diversity gain effect.

Preferably, when the multiple sets of resources unit group of ePDCCH one PRB pair of occupancy, and the ePDCCH is in multigroup money Single antenna port transmission is used in set of source, and predetermined end is selected from the corresponding mutiple antennas port of multiple sets of resources unit group The single antenna port of mouth as transmission.

Preferably, when all resource unit groups of ePDCCH one PRB pair of occupancy, and the ePDCCH is in all moneys Single antenna port transmission is used in set of source, using preset port as the single antenna port of transmission.The preferred implementation Mode can reduce because the interference that DRS multiplexed band is come, improves the transmission power of DRS, while reducing the complexity of Port detecting.

It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions It is executed in computer system, although also, logical order is shown in flow charts, and it in some cases, can be with not The sequence being same as herein executes shown or described step.

In another embodiment, a kind of transmission software of ePDCCH is additionally provided, the software is for executing above-mentioned reality Apply the technical solution described in example and preferred embodiment.

In another embodiment, a kind of storage medium is additionally provided, above-mentioned ePDCCH is stored in the storage medium Transmission software, which includes but not limited to：CD, floppy disk, hard disk, scratch pad memory etc..

The embodiment of the present invention additionally provides a kind of sending device of ePDCCH, and the sending device of the ePDCCH can be used for reality The sending method and preferred embodiment of existing above-mentioned ePDCCH, had carried out explanation, had repeated no more, below to the ePDCCH Sending device involved in module illustrate.As used below, predetermined function may be implemented in term " module " The combination of software and/or hardware.It is hard although system and method described in following embodiment are preferably realized with software The realization of the combination of part or software and hardware is also that may and be contemplated.

Fig. 2 is the structure diagram of the sending device of ePDCCH according to the ... of the embodiment of the present invention, as shown in Fig. 2, the device packet It includes：Mapping block 22 and transmitting module 24, are below described in detail the structure.

Mapping block 22, the resource unit of the predetermined number for being divided according to the resource in Physical Resource Block PRB pair The correspondence of group and the antenna port of transmission ePDCCH, the corresponding resource unit group of the antenna port is mapped to by the ePDCCH On；Transmitting module 24 is connected to mapping block 22, for sending the ePDCCH after mapping block 22 maps.

It is illustrated below in conjunction with preferred embodiment, preferred embodiment below combines above-described embodiment and preferred implementation Mode.

For convenience of description, M resource unit group in preferred embodiment below is referred to as M PRB Part；1 void Quasi- resource unit group is referred to as 1 eREG.

Preferred embodiment one

This preferred embodiment provides a kind of sending method of ePDCCH, and this method includes：Resource in PRB pair is divided For M resource unit group, resource unit group and the antenna port of transmission ePDCCH are established into correspondence, closed according to the correspondence System, which is mapped in the corresponding resource unit group of the antenna port, the ePDCCH is sent, M is positive integer.

As a preferred embodiment, when being sent using the method for transmitting diversity, used antenna end Mouth is determined by emission diversity method and upper layer.

It should be noted that in implementation process, due to there is a situation where that the resource that ePDCCH is used is less, one PRBPair (PRB pair) resource is relatively just too big, in order to avoid the wasting of resources, it is necessary to which multiple ePDCCH are multiplexed a PRB Pair or ePDCCH and PDSCH is multiplexed；It is transmitted, needs sometimes for by the mode of ePDCCH frequency of use diversity One ePDCCH is divided into multiple portions, one of part, which is put on a PRB pair, to be transmitted, this part I Can be called ePDCCH Part, and resource used in an ePDCCH Part is often small compared with a PRB Pair, at this time In order to avoid waste, we are also required to multiple ePDCCH Part being multiplexed in a PRB Pair, are often multiplexed EPDCCH Part come from different ePDCCH.For above-named two kinds of situations, it would be desirable to by a PRB Pair Be divided into multigroup.Sometimes, in some scenes, the resource of an ePDCCH demand is relatively more, generally requires to be more than or equal to 1 The resource of a PRB Pair, 1 PRB Pair also can be only divided into 1 group by us for the convenience used.Sometimes, in order to more The method for fully using transmitting diversity and frequency diversity, can be interleaved multiple ePDCCH, generate a comprehensive big number According to sequence, such data sequence often requires to use multiple PRB Pair resources, we can also incite somebody to action for the convenience used 1 PRB Pair is only divided into 1 group.When the ePDCCH of different UE carries out multiplexing transmission in the same PRBPair, they are past It is transmitted toward respective precoding is used, and channel estimation is carried out using demodulation pilot tone, this requires different UE EPDCCH need the demodulation pilot tone of oneself, that is to say, that the ePDCCH of different UE needs to emit in different antenna ports On.In order to simplify the sides UE when receiving ePDCCH to the blind Detecting of antenna port, we provides transmitting ePDCCH and use antenna The method of port, by this method, UE can very easily find corresponding antenna port and remove detection ePDCCH.Using hair When penetrating deversity scheme transmission ePDCCH, the data often sent to needs carry out some precodings, will be given birth to by precoding At the data on different port, at this moment only need the available port provided according to upper layer is corresponding with the port foundation that demand uses to close System.

As another preferably embodiment, when the PRB pair quantity is 1, when CP is Normal CP, which is 2 or 4, when CP is extension CP, which is 2.

In the preferred embodiment, it is Normal in usual carrier wave CP, there are 14 OFDM symbols in a subframe Number, wherein front 1-4 can be used for making traditional downlink control area, and the OFDM symbol number for doing control area can match It is set to 0, can also be to have, and dynamically indicate the variation of number by PCFICH by upper-layer configured, variation range 1-4, Under such circumstances, the OFDM symbol number that ePDCCH can be transmitted in PRB Pair is also variation, i.e. can in PRB Pair To be variation for the resource quantity of transmitting ePDCCH, for the number of the flexible configuration PRB Pair groups divided, and keep Every group of resource quantity size is stablized relatively in the case of each, M desirable 2 or 4.Under usual carrier wave, when CP is extension CP, one OFDM symbol number in subframe is 12, and may also change the traditional control region of size, examines filter and arrives this situation Lower is supported two demodulation pilot tones, and is generally used under the larger scene of radius of society that M values are 2.In newly-increased carrier type On, usually not no traditional control region, often the value of M can be more greatly 4；But in the lower field of some signal-to-noise ratio Under scape, it is also desirable to which the value acquirement M is smaller, is 2.

As another preferably embodiment, the resource in the PRB pair is divided into M resource unit groups and includes：According to frequency Domain RE is continuously divided into the parts M, alternatively, being divided into the parts M at equal intervals according to frequency domain RE.

In the preferred embodiment, the resource distribution mode of ePDCCH can there are two types of, one is centralization distribution, Frequency selectivity gain can be obtained；Another kind is distributed allocation, can obtain the gain of frequency diversity.It is drawn according to frequency RE The mode complexity divided is low, and receiving side is easy to calculate the Data Position of detection.

As another preferably embodiment, the resource in the PRB pair be divided into M resource unit groups may be used it is as follows One of mode：

Mode one：The RE quantity that each resource unit group includes in the M resource unit group is identical.

In this approach, in the time for distributing resource size to ePDCCH, often according to the signal-to-noise ratio and mesh for receiving UE Mark Block Error Rate carries out selection distribution, if the RE quantity that each resource unit group includes in M resource unit group is identical, can Bring the reduction for calculating upper complexity.

Mode two：Predefined resource is removed in resource in the PRB pair, by surplus resources according to frequency after first time domain Resource after rearrangement is divided into virtual resource unit group by domain alternatively, the mode of time domain is resequenced after first frequency domain, then Virtual resource unit group is divided into resource unit group, wherein each dummy unit group includes N number of RE, and N is positive integer；

In this approach, launching technique when actual implementation is existed and needs to be carried out data into precoding as unit of group Situation, such as SFBC, STBC, SFBC+STBC, open-loop precoding diversity, and the data after precoding need to be placed on adjacent bit On the RE set, or in order to as identical as possible with the channel coefficients on the RE in group or pre- in order to obtain open loop as much as possible The diversity of coding.So we provide virtual resource unit group.In order to ePDCCH multiplexing demand again by virtual resource unit group Divide resource unit group.

Mode three：The virtual resource unit group sequence is divided into M groups, alternatively, by between the virtual resource unit group etc. Every being divided into M groups.

The method of the division of virtual resource unit group sequence can be supported the resource distribution mode of centralization by which, To obtain resource selection gain；The method that virtual resource unit group is divided into M groups at equal intervals can support distributed money The source method of salary distribution, to obtain the gain of resource diversity.

Mode four：The virtual resource unit group is interweaved, the virtual resource unit group sequence after intertexture is divided into M A resource unit group, wherein the virtual resource unit group quantity that each resource unit group includes is identical.

Which interweaves virtual resource unit group, can further increase the gain of resource diversity, while terminal receives Complexity can improve.

Mode five：According to time-domain OFDM symbol, the corresponding each OFDM symbol of the PRB pair resource is divided into virtual resource Unit group, then the virtual resource unit group is divided into M resource unit group, wherein each dummy unit group includes N number of RE. This preferably is implemented in each OFDM symbol the division for carrying out virtual resource unit group, and complexity is relatively low.

It,, will be more when DRS quantity is 3 or 6 on the time-domain OFDM symbol in the implementation process of mode five than preferably A time-domain OFDM symbol containing the DRS joins together to be divided into virtual resource unit group.

Such as：In a PRB Pair in the OFDM symbol containing DRS, there is remaining RE numbers after removing DRS expenses It may be odd number, such as in the case of Normal CP, only use antenna port 7,8, then there is 3 RE in terms of DRS Expense, be left 9 RE can be used for ePDCCH transmission, if in virtual resource group RE number be 2, will there are one RE cannot It is allocated；Sometimes the integral multiple that remaining RE numbers after DRS expenses may not be 4 is removed, such as the Normal CP the case where Under, using antenna port 7,8,9,10, then there is 6 RE for the expense in terms of DRS, remaining 6 can be used for ePDCCH transmission, If a of RE is 4 in virtual resource group, just having 2 RE cannot be allocated.In order to fully utilize resource, one Multiple OFDM symbols containing DRS are joined together to be divided into virtual resource list without group in a PRB Pair.

In aforesaid way four and mode five, it may be used the virtual resource unit group according to frequency domain after first time domain, or Person, the mode sequence of time domain is divided into M resource group after first frequency domain.Which is a kind of method simply dividing M resource groups.

Preferably, which is 1,2,3,4.By carrying out above-mentioned setting, it is adapted to a variety of transmitting diversity pre-coding schemes.

As another preferably embodiment, when M is 2, the M resource group and antenna port { 7,8 } one-to-one correspondence, Alternatively, the M resource group and one group of correspondence in antenna port { 7,9 } and { 8,10 }, alternatively, the M resource group and antenna port One group of correspondence in { 7,8 } and { 9,10 }.

In this approach, the DRS on antenna port 7,8 carries out code division multiplexing using identical RE, on antenna port 9,10 DRS using identical RE carry out code division multiplexing, the DRS of multiple ports is emitted on identical RE, the DRS of each port can get The sum of a part, that is, each port DRS power for entire RE power is equal to the general power on used RE；As M=2, A kind of simple antenna port is configured to M resource group and is corresponded with antenna port { 7,8 }；Sometimes with the multiplexing of cell in phase Can be stronger with the DRS interference between the antenna port on RE, in order to avoid the adverse effect that this interference fringe comes, improve simultaneously The transmission power of antenna port can not be multiplexed on identical RE by row with the antenna port DRS of cell, such as M resource group With one group of correspondence in antenna port { 7,9 } and { 8,10 }；Sometimes the interference between neighboring community is stronger, and it is strong can to configure interference Cell DRS not on identical RE, such as one group of correspondence in the M resource group and antenna port { 7,8 } and { 9,10 }.

As another preferably embodiment, when M is 4, the M resource group and antenna port { 7,8,9,10 } are one by one It is corresponding.

In this approach, just equal with the antenna port number that can be provided in PRB Pair as M=4, use M A resource group and antenna port { 7,8,9,10 } one-to-one method, receiving side can easily find the antenna end of oneself Mouthful, reduce the complexity of antenna port detection.

As another preferably embodiment, different PRB pairs, the antenna port of the resource unit group and transmission ePDCCH Correspondence is identical.The preferred embodiment realizes that in different PRB Pair, resource list is without group and the day for transmitting ePDCCH Line end mouth correspondence is identical, and method is simple, reduces the detection complexity of receiving terminal.

As another preferably embodiment, the antenna port correspondence of the resource unit group and transmission ePDCCH by Indicate that information determines, wherein the instruction information includes：PRB pair indexes, resource unit group index, cell ID, in time slot index One or more.The preferred embodiment realizes resource unit group and transmits the antenna port correspondence of ePDCCH by indicating Information determines, can accomplish flexible configuration, play antenna port DRS interference randomizations between cell, the channel carried out using DRS Estimation obtains the benefit of diversity gain.

In force, under type such as may be used and indicate the correspondence：

Mode one：The resource unit group and the antenna port correspondence of transmission ePDCCH are true by resource unit group index Fixed, M resource group, to M antenna port, m-th of resource group corresponds to m-th of antenna port.

Which correspondence is simple, and complexity is low.

Mode two：The antenna port correspondence of the resource unit group and transmission ePDCCH by resource unit group index and PRB pair index determines that M resource group, to M antenna port, m-th of resource group of k-th of PRB pair corresponds to (m+k) mod M antenna port.The channel estimation being randomized in each resource group may be implemented in which, obtains the diversity gain of channel estimation.

Mode three：The antenna port correspondence of the resource unit group and transmission ePDCCH by resource unit group index and PRB pair index determination, M resource group, to M antenna port, m-th of resource group of k-th of PRB pair of cell ID f subframes t Corresponding to (x+m) mod M antenna ports, wherein x is arbitrary parameters that one or more are obtained in f, time slot i according to k. Antenna port DRS interference randomizations between cell may be implemented in which, and diversity gain is obtained using the channel estimation that DRS is carried out Effect.

Than preferably, which can be signal deployment.The flexibility of configuration can be improved by signal deployment.

Than preferably, which changes with subframe and is changed.PRB pair changes with subframe and is changed in the embodiment, can To play interference randomization, the effect of diversity gain is obtained.

As another, preferably embodiment should when an ePDCCH occupies multiple sets of resources in a PRB pair EPDCCH uses single antenna port transmission in the multiple sets of resources, and single antenna port used in the transmission is corresponding from the multiple sets of resources It is selected by predefined method in mutiple antennas port.

As another, preferably embodiment uses single antenna end when an ePDCCH occupies whole PRB pair resources Port transmission, the PRB pair resource correspond to 1 predefined antenna distance port.By the preferred embodiment, can reduce because DRS is multiple With the interference brought, and the transmission power of DRS is improved, while reducing the complexity that Port detecting is brought.

By this preferred embodiment, realizes ePDCCH and mapped on physical resource, meanwhile, using preferred implementation When different concrete configurations in mode, a variety of situations can be well adapted for, and provide the transmission performance of good ePDCCH, And reduce the complexity of transmission and detection.

Preferred embodiment two

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Without downlink control area.

In the present embodiment, in the case of Normal CP, traditional downlink control area is not configured, is used for transmission The PRB Pair (to) of ePDCCH are continuously divided into 4 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1,2, 3；Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) are corresponding Antenna port 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 4 PRB Part's by frequency domain RE Situation is as shown in Figure 3.

Preferred embodiment three

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Normal CP are passed System control area configures 1 OFDM symbol.

In the present embodiment, in the case of Normal CP, traditional control region configures 1 OFDM symbol, is used for transmission The PRB Pair of ePDCCH are continuously divided into 4 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1,2,3； Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) correspond to day Line end mouth 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 4 PRB Part's by frequency domain RE Situation is as shown in Figure 4.

Preferred embodiment four

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Normal CP are passed System control area configures 3 OFDM symbols.

In the present embodiment, in the case of Normal CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are continuously divided into 4 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1,2,3； Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) correspond to day Line end mouth 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 4 PRB Part's by frequency domain RE Situation is as shown in Fig. 5.

Preferred embodiment five

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, M=2, and antenna port corresponds to one of them.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are continuously divided into 2 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1；Part (0) ePDCCH is mapped to the corresponding money of each antenna port by respective antenna port 7, Part (1) respective antenna port 8 On the group PRB Part of source, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 2 PRB Part's by frequency domain RE Situation is as shown in Fig. 6.

Preferred embodiment six

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, M=2, and antenna port corresponds to two wherein.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are continuously divided into 2 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1；Part (0) ePDCCH is mapped to the corresponding money of each antenna port by respective antenna port 9, Part (1) respective antenna port 10 On the group PRB Part of source, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 2 PRB Part's by frequency domain RE Situation is as shown in Figure 7.

Preferred embodiment seven

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, M=2, and antenna port corresponds to three wherein.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are continuously divided into 2 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1；Part (0) ePDCCH is mapped to the corresponding money of each antenna port by respective antenna port 7, Part (1) respective antenna port 9 On the group PRB Part of source, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 2 PRB Part's by frequency domain RE Situation is as shown in Figure 8.

Preferred embodiment eight

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, M=2, and antenna port corresponds to four wherein.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are continuously divided into 2 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1；Part (0) ePDCCH is mapped to the corresponding money of each antenna port by respective antenna port 8, Part (1) respective antenna port 10 On the group PRB Part of source, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 2 PRB Part's by frequency domain RE Situation is as shown in Figure 9.

Preferred embodiment nine

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, MBSFN sub-frame situation.

In the present embodiment, in the case of Normal CP, in the case of MBSFN sub-frame, traditional control region configures 2 OFDM symbol, the PRB Pair for being used for transmission ePDCCH are continuously divided into 4 PRB Part, respectively Part (n) by frequency domain RE, Wherein n=0,1,2,3；Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) respective antenna ports 10；The ePDCCH is mapped on the corresponding resource group PRBPart of each antenna port, Send the ePDCCH.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 4 PRB Part's by frequency domain RE Situation is as shown in Figure 10.

Preferred embodiment ten

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：It extends under CP, tradition Control area configures 3 OFDM symbols.

In the present embodiment, in the case where extending CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are continuously divided into 2 PRB Part, respectively Part (n), wherein n=0 by frequency domain RE, and 1；Part (0) ePDCCH is mapped to the corresponding money of each antenna port by respective antenna port 7, Part (1) respective antenna port 8 On the group PRB Part of source, the ePDCCH is sent.

It should be noted that be used for transmission the PRB Pair of ePDCCH is continuously divided into 2 PRB Part's by frequency domain RE Situation is as shown in figure 11.

Preferred embodiment 11

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, divides PRB Part at equal intervals by frequency domain.

In the present embodiment, in the case of Normal CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0 at equal intervals by frequency domain RE, and 1,2,3； Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) correspond to day Line end mouth 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

It should be noted that the PRB Pair for being used for transmission ePDCCH are divided into 4 PRB Part at equal intervals by frequency domain RE The case where it is as shown in figure 12.

Preferred embodiment 12

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, divides PRB Part, M=2 at equal intervals by frequency domain.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are divided into 2 PRB Part, respectively Part (n), wherein n=0 at equal intervals by frequency domain RE, and 1； It is corresponding to be mapped to each antenna port by Part (0) respective antenna port 9, Part (1) respective antenna port 10 by the ePDCCH On resource group PRB Part, the ePDCCH is sent.

It should be noted that the PRB Pair for being used for transmission ePDCCH are divided into 2 PRB Part at equal intervals by frequency domain RE The case where it is as shown in figure 13.

Preferred embodiment 13

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, and contained RE number is equal in each PRB Part.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The RE numbers that the PRB Pair of defeated ePDCCH are divided on 4 PRB Part, each Part are equal, respectively Part (n), wherein n =0,1,2,3；Part (0) respective antenna port 7, Part (1) respective antenna port 8, Part (2) respective antenna port 9, Part (3) respective antenna port 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, sending should ePDCCH。

It should be noted that being specially by the method for being divided into 4 PRB Part by PRB Pair：It will be in PRB Pair It can be ranked up with RE, the RE arranged adjacents of adjacent position, then the RE for lining up sequence is sequentially included into each PRBPart respectively in turn.

For example, PRB Pair are divided into Part (0), Part (1), Part (2), Part (3)；The serial number RE (n) of RE, n= 0,1,2 ...；Then RE (0) is partitioned into Part (0), and RE (1) is partitioned into Part (1), RE (2) is partitioned into Part (2), and RE (3) is drawn Divide into Part (3), RE (4) is partitioned into Part (0), and RE (5) is partitioned into Part (1), RE (6) is partitioned into Part (2), and RE (7) is drawn Divide into Part (3) ....

The method that RE sequences can also be used in the present embodiment：For example, the RE in the 1st OFDM is first arranged, then the 2nd RE in OFDM symbol, the then RE in the 3rd OFDM symbol ...；RE in 1st OFDM symbol presses frequency ascending order It arranges, the RE in the 2nd OFDM symbol is arranged by frequency descending, and the RE in the 3rd OFDM symbol is arranged by frequency ascending order, is interlocked by such Frequency lifting sequence arranges the RE in OFDM symbol below.RE that can also be in the 1st OFDM is arranged by frequency descending, by staggeredly frequency Rate lifting sequence arranges the RE in OFDM symbol below.Alternatively,

For example, the RE in the 1st subcarrier is first arranged, the then RE in the 2nd subcarrier, then in the 3rd subcarrier RE ...；RE in 1st subcarrier is arranged by OFDM symbol ascending order, in the 2nd subcarrier in RE press OFDM symbol descending It arranges, the RE in the 3rd subcarrier is arranged by OFDM symbol ascending order, by the arrangement of such staggered frequence lifting sequence below subcarrier RE.RE that can also be in the 1st subcarrier is arranged by frequency descending, is arranged in subcarrier below by staggered frequence lifting sequence RE。

It should be noted that be used for transmission the PRB Pair of ePDCCH is divided into 4 PRB Part's by equal RE numbers Shown in situation such as Figure 14 (a) (b) (c).Figure 14 (a) is the RE wheels after sequence before the available RE in low serial number OFDM symbol comes Stream is included in different PRB Part；Figure 14 (b) is before the available RE in low-frequency subcarrier comes, and the RE after sequence is included in not in turn In same PRB Part；Figure 14 (c) shows the relationship between RE and PRB after sequence.

Preferred embodiment 14

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, introduces eREG.

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；Each PRBPart All correspond to 4 antenna ports, port 7,8,9,10, transmitting diversity coding after 4 corresponding ports be respectively port 7,8, 9,10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

It should be noted that the method that PRB Pair are divided into 4 PRB Part is：In resource in the PRB Pair Predefined resource is removed, by surplus resources according to frequency domain after first time domain, alternatively, the mode of time domain is resequenced after first frequency domain, Resource after rearrangement is divided into virtual resource unit group (eREG), then virtual resource unit group is divided into resource unit group (PRB Part), wherein each dummy unit group includes N number of RE, and N is positive integer.Here N is taken as 4.

In the present embodiment, under type such as may be used and carry out RE sequences：

RE in 1st OFDM is first arranged, then the RE in the 2nd OFDM symbol, then in the 3rd OFDM symbol RE ...；RE in 1st OFDM symbol is arranged by frequency ascending order, and the RE in the 2nd OFDM symbol is arranged by frequency descending, and the 3rd RE in a OFDM symbol is arranged by frequency ascending order, by the RE in the arrangement of such staggered frequence lifting sequence below OFDM symbol.Also may be used It is arranged by frequency descending with the RE in the 1st OFDM, by the RE in the arrangement of staggered frequence lifting sequence below OFDM symbol.Alternatively,

Preferably, it is by the method that virtual resource unit group (eREG) divides resource unit group (PRB Part)：By the void Quasi- resource unit group (eREG) sequence is divided into M groups (PRB Part), alternatively, by virtual resource unit group eREG) etc. between Every being divided into M groups (PRB Part)；EREG numbers are equal contained by each PRB Part；M takes 4 in this example.

Shown in method such as Figure 15 (a) (b) (c) (d) that PRB Pair are divided into 4 PRB Part in the present embodiment.Figure Before 15 (a) shows that the available RE in low serial number OFDM symbol comes；Figure 15 (b) shows that the available RE in low-frequency subcarrier is arranged Preceding；Figure 15 (c) shows that the RE after sequence constitutes eREG；Figure 15 (d) shows that eREG is divided into according to tandem PRBPart。

Preferred embodiment 15

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, introduces eREG, and eREG is interleaved.

It is by the PRB Pair methods for being divided into 4 PRB Part in the present embodiment：Resource in the PRB Pair It is middle to remove predefined resource, surplus resources are sorted according to frequency domain after first time domain, the resource after rearrangement is divided into void Quasi- resource unit group (eREG), which is interweaved, by drawing for the virtual resource unit group sequence after intertexture It is divided into 4 resource unit group PRB Part, wherein each dummy unit group includes N number of RE, and N is positive integer.Here N is taken as 4.

Preferably, the present embodiment can use the method that following RE sorts：RE in 1st OFDM is first arranged, then the 2nd RE in OFDM symbol, the then RE in the 3rd OFDM symbol ...；RE in 1st OFDM symbol presses frequency ascending order It arranges, the RE in the 2nd OFDM symbol is arranged by frequency descending, and the RE in the 3rd OFDM symbol is arranged by frequency ascending order, is interlocked by such Frequency lifting sequence arranges the RE in OFDM symbol below.RE that can also be in the 1st OFDM is arranged by frequency descending, by staggeredly frequency Rate lifting sequence arranges the RE in OFDM symbol below.

Preferably, it is by the method that the virtual resource unit group interweaves：Equipped with N1 eREG, i.e. eREG (n), n=0, 1 ... N1-1；This N1 eREG is taken out by rows in order, often M1 eREG of row, first arrange the 1st row, then arranges the 2nd row, with This analogizes；If less than M1 eREG of last column, with placeholder occupy-place；Then it presses Leie sequence and takes out eREG, and sequential, The 1st row are first taken, then take the 2nd row, and so on, placeholder is taken out from the sequence after arrangement, obtains the new sequence of eREG.

Shown in method such as Figure 16 (a) (b) (c) (d) that PRB Pair are divided into 4 PRB Part in the present embodiment.Figure Before 16 (a) shows that the available RE in low serial number OFDM symbol comes；Figure 16 (b) shows that the RE after sequence constitutes eREG；Figure 16 (c) shows that eREG interweaves；Figure 16 (d) shows that eREG is divided into PRBPart according to tandem.

Preferred embodiment 16

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, and eREG is divided by OFDM symbol.

In the present embodiment, in the case of Normal CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；Each PRB Part Corresponding 4 antenna ports, port 7,8,9,10,4 corresponding ports after transmitting diversity coding be respectively port 7,8,9, 10；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, the ePDCCH is sent.

Preferably, it may be used and PRB Pair be divided into 4 PRB Part such as under type：First adjacent available RE is drawn It is divided into eREG, contains 4 RE in each eREG, then eREG is divided into 4 PRB Part.

Preferably, it is by the available RE methods for being divided into eREG：EREG will be divided to the RE in each OFDM symbol； It is from low to high to draw 4 available continuous RE in the method that the RE in one of OFDM symbol is divided into eREG It is divided into an eREG, as shown in Figure 17 (a) (b).Figure 17 (a) shows that RE forms eREG in 1 PRB pair；Figure 17 (b) is shown Continuous 4 adjacent available RE form an eREG in one OFDM symbol.

Preferably, it is specially by the method that virtual resource unit group (eREG) divides resource unit group (PRB Part)：One The index (k, l) that its subcarrier serial number k is formed with time-domain OFDM symbol serial number l may be used to indicate in a RE；The expression of eREG Method is, the index (k, l) of k minimums and the element of l minimums indicates this eREG in eREG elements.By eREG by its index come into Frequency domain index row is first pressed in row sequence, then Domain Index is arranged on time；Frequency domain index it is small before coming, frequency domain index it is mutually big after coming, Same frequency index Domain Index on time sequence, when the small row of Domain Index before, when the big row of Domain Index after.By the void after sequence Quasi- resource unit group (eREG) sequence is divided into M groups (PRB Part), alternatively, the virtual resource unit group after sorting EREG it) is divided into M groups (PRB Part) at equal intervals；M is 4 in this preferred embodiment.

Preferred embodiment 17

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, and the OFDM symbol joint containing DMRS considers to divide eREG.

Preferably, it is by the PRB Pair methods for being divided into 4 PRB Part：First adjacent available RE is divided into Contain 4 RE in eREG, each eREG, then eREG is divided into 4 PRB Part.

Preferably, it is by the available RE methods for being divided into eREG：RE is divided into eREG in OFDM symbol without DMRS Method be that eREG will be divided to the RE in each OFDM symbol；It is divided by the RE in one of OFDM symbol The method of eREG is that 4 available continuous RE are divided into an eREG from low to high.In OFDM symbol containing DMRS The method that RE is divided into eREG：Multiple OFDM symbol joints containing DMRS, eREG is divided by available RE therein.

Preferably, multiple OFDM symbol joints containing DMRS, available RE therein, which is divided into eREG specific methods, is：Contain 4 OFDM symbols of DRS are combined, and an eREG can be formed with RE, and 4 RE on one of subcarrier form one eRDG。

Shown in the method such as Figure 18 (a) (b) (c) for being made of eREG RE.Figure 18 (a) shows RE groups in a PRB Pair At eREG, wherein include 4 RE in an eREG；Figure 18 (b) is shown continuous 4 in the OFDM symbol without DRS (DMRS) A adjacent available RE forms an eREG；Figure 18 (c) shows that 4 OFDM symbols comprising DRS are combined, and can be formed with RE One eREG, wherein 4 RE on a subcarrier form an eREG.

Preferably, it is by the method that resource unit group (eREG) divides resource unit group (PRB Part)：One RE can be with It is indicated using the index (k, l) of its subcarrier serial number k and time-domain OFDM symbol serial number l compositions；The representation method of eREG is, The index (k, l) of the element of k minimums and l minimums indicates this eREG in eREG elements.EREG is ranked up by its index, Frequency domain index row is first pressed, then Domain Index is arranged on time；Frequency domain indexes small before coming, and frequency domain indexes mutually big after coming, same frequency The Domain Index on time of Domain Index sorts, when the small row of Domain Index before, when the big row of Domain Index after.By the virtual resource after sequence Unit group (eREG) sequence is divided into M groups (PRB Part), alternatively, will sequence after virtual resource unit group eREG) etc. between Every being divided into M groups (PRB Part)；M takes 4 in this example.

Preferred embodiment 18

Preferably, the method that PRB Pair are divided into 4 PRB Part is：Adjacent available RE is first divided into eREG, Contain 4 RE in each eREG, then eREG is divided into 4 PRB Part.

Preferably, multiple OFDM symbol joints containing DMRS, available RE therein, which is divided into eREG specific methods, is：Contain It is jointly formed one group of OFDM symbol per similar two OFDM symbols in the OFDM symbol of DRS, it will be adjacent in one group of OFDM symbol 4 available RE form an eREG.

Shown in the method such as Figure 19 (a) (b) (c) for being made of eREG RE.Figure 19 (a) shows RE groups in a PRB Pair At eREG, wherein include 4 RE in an eREG；Figure 19 (b) is shown continuous 4 in the OFDM symbol without DRS (DMRS) A adjacent available RE forms an eREG；Figure 19 (c) shows in the OFDM symbol comprising DRS and is accorded with per two adjacent OFDM Number one group of OFDM symbol is constituted jointly, 4 available RE adjacent in one group of OFDM symbol are formed into an eREG.

Preferably, it is specially by the method that resource unit group (eREG) divides resource unit group (PRB Part)：One RE The index (k, l) that its subcarrier serial number k is formed with time-domain OFDM symbol serial number l may be used to indicate；The representation method of eREG For the index (k, l) of the element of k minimums and l minimums indicates this eREG in eREG elements.EREG is arranged by its index Sequence first presses frequency domain index row, then Domain Index is arranged on time；Frequency domain index it is small before coming, frequency domain index it is mutually big after coming, it is identical Frequency domain index Domain Index on time sequence, when the small row of Domain Index before, when the big row of Domain Index after.By the virtual money after sequence Set of source (eREG) sequence is divided into M groups (PRB Part), alternatively, virtual resource unit group eREG after sorting) etc. Interval is divided into M groups (PRB Part)；M takes 4 in this example.

Preferred embodiment 19

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, The case where traditional control region configures 3 OFDM symbols, and the OFDM symbol joint containing DMRS considers to divide eREG；Contain in per eREG 2 RE.

In the present embodiment, in the case of Normal CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；Each PRB Part Corresponding 2 antenna ports, port 7,9,4 corresponding ports after transmitting diversity encodes are port 7,9 respectively；It should EPDCCH is mapped on the corresponding resource group PRB Part of each antenna port, sends the ePDCCH.

Preferably, the method that PRB Pair are divided into 4 PRB Part is：Adjacent available RE is first divided into eREG, Contain 2 RE in each eREG, then eREG is divided into 4 PRB Part.

Preferably, it is by the available RE methods for being divided into eREG：RE is divided into eREG in OFDM symbol without DMRS Method be that eREG will be divided to the RE in each OFDM symbol；It is divided by the RE in one of OFDM symbol The method of eREG is that 2 available continuous RE are divided into an eREG from low to high.In OFDM symbol containing DMRS The method that RE is divided into eREG：Multiple OFDM symbol joints containing DMRS, eREG is divided by available RE therein.

Preferably, multiple OFDM symbol joints containing DMRS, available RE therein, which is divided into eREG specific methods, is：Contain It is jointly formed one group of OFDM symbol per similar two OFDM symbols in the OFDM symbol of DRS, it will be adjacent in one group of OFDM symbol 2 available RE form an eREG.

Shown in the method such as Figure 20 (a) (b) (c) for being made of eREG RE.Figure 20 (a) shows RE groups in a PRB Pair At eREG, wherein include 2 RE in an eREG；Figure 20 (b) is shown continuous 2 in the OFDM symbol without DRS (DMRS) A adjacent available RE forms an eREG；Figure 20 (c) shows in the OFDM symbol comprising DRS and is accorded with per two adjacent OFDM Number one group of OFDM symbol is constituted jointly, 2 available RE adjacent in one group of OFDM symbol are formed into an eREG.

Preferred embodiment 20

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：It extends under CP, tradition The case where control area configures 3 OFDM symbols, and the OFDM symbol joint containing DMRS considers to divide eREG；Contain 2 in per eREG RE。

In the present embodiment, in the case where extending CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；Each PRB Part Corresponding 2 antenna ports, port 7,9,4 corresponding ports after transmitting diversity encodes are port 7,8 respectively；It should EPDCCH is mapped on the corresponding resource group PRB Part of each antenna port, sends the ePDCCH.

Shown in the method such as Figure 21 (a) (b) (c) for being made of eREG RE.Figure 21 (a) shows RE groups in a PRB Pair At eREG, wherein include 2 RE in an eREG；Figure 21 (b) is shown continuous 2 in the OFDM symbol without DRS (DMRS) A adjacent available RE forms an eREG；Figure 21 (c) shows in the OFDM symbol comprising DRS and is accorded with per two adjacent OFDM Number one group of OFDM symbol is constituted jointly, 2 available RE adjacent in one group of OFDM symbol are formed into an eREG.

Preferred embodiment 21

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, Traditional control region configures 3 OFDM symbols, and eREG is divided by OFDM symbol, by the element composition one of same position in eREG A Part.

In the present embodiment, in the case of Normal CP, traditional control region configures 3 OFDM symbols, is used for transmission The PRB Pair of ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；With antenna port (7, 8,9 it, 10) corresponds；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, sending should ePDCCH。

Preferably, the method that PRB Pair are divided into 4 PRB Part is：It first will be adjacent available in each OFDM symbol RE is divided into eREG；EREG is divided into 4 PRB Part again, wherein the 1st element composition PRB Part (0) in each eREG, 3rd element composition PRBPart (2) in 2nd element composition PRB Part (1) in each eREG, each eREG, the 4th in each eREG A element composition PRB Part (3).

Preferably, it is by the available RE methods for being divided into eREG：EREG will be divided to the RE in each OFDM symbol； It is from low to high to divide 4 available continuous RE by the methods for being divided into eREG of the RE in one of OFDM symbol The RE below less than 4 is divided into an eREG, such as Figure 22 institutes if RE numbers are not 4 integral multiples for an eREG Show.In fig. 22, in each OFDM symbol, adjacent RE can be used to form an eREG by 4, if can not be 4 with RE numbers Integer speed, the remaining RE less than 4 also constitutes an eREG.

Preferred embodiment 22

A kind of sending method of ePDCCH is present embodiments provided, scene in the present embodiment is：Under Normal CP, The case where traditional control region 3 OFDM symbols of configuration, introducing eREG, the element of same position in eREG is formed one Part。

In the present embodiment, in the case of Normal CP, traditional control region only configures 3 OFDM symbols, for passing The PRB Pair of defeated ePDCCH are divided into 4 PRB Part, respectively Part (n), wherein n=0, and 1,2,3；With antenna port (7,8,9,10) it corresponds；The ePDCCH is mapped on the corresponding resource group PRB Part of each antenna port, is sent The ePDCCH.

Preferably, the method that PRB Pair are divided into 4 PRB Part is：It is removed in resource in the PRB Pair pre- The resource of definition, by surplus resources according to frequency domain after first time domain, alternatively, the mode of time domain is resequenced after first frequency domain, it will again Resource after sequence is divided into virtual resource unit group (eREG), then eREG is divided into N number of PRB Part, wherein in each eREG 2nd element composition PRB Part (1) in 1st element composition PRB Part (0), each eREG, the 3rd element group in each eREG At PRB Part (2), the 4th element forms PRB Part (3) in each eREG.Wherein, each dummy unit group includes N number of RE, N For positive integer.Here N is taken as 4.

Preferably, can be with the RE methods to sort：RE in 1st OFDM is first arranged, then in the 2nd OFDM symbol RE, the then RE in the 3rd OFDM symbol ...；RE in 1st OFDM symbol is arranged by frequency ascending order, the 2nd OFDM symbol RE in number is arranged by frequency descending, and the RE in the 3rd OFDM symbol is arranged by frequency ascending order, by the lifting sequence arrangement of such staggered frequence RE in OFDM symbol below.RE that can also be in the 1st OFDM is arranged by frequency descending, after being arranged by staggered frequence lifting sequence RE in the OFDM symbol of face.Alternatively,

Shown in method such as Figure 23 (d) that PRB Pair are divided into 4 PRB Part in the present embodiment.

In the preferred embodiment, before Figure 23 (a) shows that the available RE in low serial number OFDM symbol comes, after sequence RE is included in turn in different PRB Part；Before Figure 23 (b) shows that the available RE in low-frequency subcarrier comes, the RE after sequence It is included in turn in different PRB Part；Figure 23 (c) shows that the RE after sequence constitutes eREG；Figure 23 (d) is shown by eREG It is divided into PRB Part.

By above-described embodiment, a kind of ePDCCH sending methods and device are provided, by dividing the resource in PRB pair For the resource unit group of predetermined number, the reasonable utilization of resource is realized, meanwhile, it is blind in reception ePDCCH in order to reduce receiving side The ePDCCH is mapped to the antenna port pair by the complexity of detection using the correspondence of resource unit group and antenna port In the resource unit group answered so that receiving terminal is quickly found out corresponding antenna port, and is detected, and overcomes in the related technology Enhancing Physical Downlink Control Channel (ePDCCH) has been preset, but has been not prescribed by the sending method of the ePDCCH, has led to downlink control The poor problem of the transmission performance of signaling processed, not only increases the transmission performance of ePDCCH, while reducing receiving terminal detection Complexity it should be noted that these technique effects are not possessed by above-mentioned all embodiments, some technologies effect Fruit, which is certain preferred embodiments, to be obtained.

Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed Network on, optionally, they can be realized with the program code that computing device can perform, so as to be stored in It is performed by computing device in storage device, either they are fabricated to each integrated circuit modules or will be in them Multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hard Part and software combine.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of transmission method of enhancing Physical Downlink Control Channel ePDCCH, it is characterised in that including：

The resource unit group of the predetermined number divided according to the resource in Physical Resource Block PRB pair and the antenna for transmitting ePDCCH The ePDCCH is mapped in the corresponding resource unit group of the antenna port by the correspondence of port；

Send the ePDCCH after mapping；

The correspondence is determined by instruction information, wherein the instruction information includes at least one of：

The indexing of the PRB pair, the index of the resource unit group, cell ID, time slot index；

Wherein, the correspondence is indicated one of in the following manner：

The index of resource unit group described in the PRB pair and the index of the antenna port according to index number sequence one by one It is corresponding；

There are M antenna port of M resource group, m-th of resource unit group of k-th of PRB pair, corresponding day Line end mouth is (m+k) mod M；

There are M antenna port of M resource group, cell ID f, subframe is the m of k-th of PRB pair of t A resource unit group, corresponding antenna port are (x+m) mod M, wherein x is the parameter determined according to k, f, subframe t；

Wherein, M, k, m, f, t are the integer more than 0.

2. according to the method described in claim 1, it is characterized in that, the predetermined number resource unit divided according to PRB pair The correspondence of group and the antenna port of transmission ePDCCH, the corresponding resource list of the antenna port is mapped to by the ePDCCH Before in tuple, further include：

Resource in the PRB pair is divided into the resource unit group of the predetermined number at equal intervals according to sub-carrier indices；

The resource of the PRB pair is removed into other resources except predetermined resource, is divided into virtual resource unit group, and will be described Virtual resource unit group is divided into the resource unit group of predetermined number；

According to time domain orthogonal frequency division multiplex OFDM symbol, each OFDM symbol in the resource in the PRB is divided into virtually Resource unit group, and the virtual resource unit group is divided into the resource unit group of predetermined number.

3. according to the method described in claim 2, it is characterized in that, the resource of the PRB pair is removed except predetermined resource Other resources, being divided into virtual resource unit group includes：

By remove other resources except the predetermined resource according to time domain after frequency domain after first time domain or first frequency domain sequence into Row sequence；

Resource after the sequence is divided into virtual resource unit group.

4., will be described according to the method described in claim 2, it is characterized in that, according to time domain orthogonal frequency division multiplex OFDM symbol Each OFDM symbol in resource in PRB is divided into virtual resource unit group：

The virtual resource unit group is ranked up according to the sequence of first frequency domain time domain again；Alternatively,

The virtual resource unit group is ranked up according to the sequence of first time domain frequency domain again.

5. method according to claim 3 or 4, which is characterized in that the resource after the sequence is divided into virtual resource Unit group includes：

The virtual resource unit group is divided into the resource unit group of predetermined number according to sequencing or at equal intervals；Or

The virtual resource unit group is interweaved, being divided into for the virtual resource unit group sequence after intertexture is described predetermined The resource unit group of number.

6. according to the method described in claim 2, it is characterized in that, the RE numbers that the virtual resource unit group includes are following One of：1,2,3,4,5,6.

7. according to the method described in claim 2, it is characterized in that, according to time domain orthogonal frequency division multiplex OFDM symbol, by institute It states each OFDM symbol in the resource in PRB pair and is divided into virtual resource unit group and include：

It, will be described after the time-domain OFDM symbol of the DRS is combined when DRS quantity on the time-domain OFDM symbol is 3 or 6 Resource in PRB pair is divided into the virtual resource unit group.

8. method according to claim 1 to 4, which is characterized in that the correspondence is one of the following：

When predetermined number is 2, the resource unit group of the predetermined number is corresponding with the transmission antenna port 7 and 8 of ePDCCH；Or Person, the resource unit group of the predetermined number and the antenna port of the following transmission ePDCCH one of combined are corresponding：7,9；8,10； 7,8；9,10；

When predetermined number is 4,7,8,9,10 phase of antenna port of the resource unit group and transmission ePDCCH of the predetermined number It is corresponding.

9. method according to claim 1 to 4, which is characterized in that correspond to the described right of different PRB pairs It should be related to identical.

10. method according to claim 1 to 4, which is characterized in that the PRB pair is by signal deployment.

11. method according to claim 1 to 4, which is characterized in that the PRB pair is in different subframes Positioned at different positions.

12. method according to claim 1 to 4, which is characterized in that when an ePDCCH occupies a PRB To multiple sets of resources unit group, and the ePDCCH in the multiple sets of resources unit group use single antenna port transmission, from institute State the single antenna port for selecting predetermined port as transmission in the corresponding mutiple antennas port of multiple sets of resources unit group.

13. method according to claim 1 to 4, which is characterized in that when an ePDCCH occupies a PRB To all resource unit groups, and the ePDCCH in all resource unit groups use single antenna port transmission, use The single antenna port of the preset port as transmission, and determined in the PRB pair in the way of the single antenna port Available resources.

14. a kind of transmitting device of enhancing Physical Downlink Control Channel ePDCCH, which is characterized in that including：

Mapping block, the resource unit group and biography of the predetermined number for being divided according to the resource in Physical Resource Block PRB pair The ePDCCH is mapped to the corresponding resource unit group of the antenna port by the correspondence of the antenna port of defeated ePDCCH On；

Transmitting module, for sending the ePDCCH after mapping；

Wherein, the correspondence is indicated one of in the following manner：

Wherein, M, k, m, f, t are the integer more than 0.