CN103220795A

CN103220795A - Sending method and base station of downlink control information

Info

Publication number: CN103220795A
Application number: CN2012100198988A
Authority: CN
Inventors: 石靖; 戴博; 夏树强; 方惠英; 李新彩
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-01-21
Filing date: 2012-01-21
Publication date: 2013-07-24
Also published as: WO2013107250A1

Abstract

The invention provides a sending method of downlink control information. A base station transmits public information or user proprietary information to user equipment through a physical downlink shared channel (PDSCH), indication is conducted through the downlink control information (DCI) which is carried by a control channel, and the bandwidth which is occupied by the PDSCH is smaller than a system bandwidth. The invention further provides the base station.

Description

The sending method of Downlink Control Information and base station

Technical field

The present invention relates to wireless communication field, particularly, the sending method and the base station that relate to a kind of a kind of Downlink Control Information that in LTE/LTE-A (Long Term Evolution/Long Term Evolution Advance, Long Term Evolution/senior Long Term Evolution) system and evolution system thereof, is suitable for.

Background technology

MTC (Machine Type Communication, Machine Type communication) user terminal (MTC User Equipment is called for short MTC UE), claim M2M (Machine to Machine again, machine to machine is called for short M2M) user communication device is the main application form of present stage Internet of Things.But low power consumption and low cost is the important leverage of its large-scale application.At present, the M2M technology has obtained the support of international well-known manufacturers such as NEC, HP, CA, Intel, IBM, AT﹠T and the approval of various countries mobile operator.The M2M equipment of existing market deploy is mainly based on GSM (Global System of Mobile communication, global mobile communication) system.In recent years, because the spectrum efficiency height of LTE/LTE-A, increasing mobile operator selects the evolution direction of LTE/LTE-A as the future wireless system.Many kinds of class data services of M2M based on LTE/LTE-A will be more attractive also.It is lower than the MTC terminal of gsm system to have only the one-tenth instinct of LTE-M2M equipment to accomplish, the M2M business could really forward in the LTE system from GSM.

The cost that influences MTC UE mainly is Base-Band Processing and radio frequency.And reduce the radio-frequency antenna number is a kind of very effective mode that reduces MTC UE cost.Be the minimalist configuration of the reception antenna of MTC UE less than two reception antennas of the traditional LTE terminal of routine (Ordinary Legacy R8/9/10 UE is called for short OL UE).As shown in Figure 1, low-cost MTC UE and traditional UE all can pass through PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) sends DCI (Downlink Control Information, Downlink Control Information), and MTC UE and redaction LTE-A (New Version R11/etc.UE, abbreviation NV UE) all can pass through ePDCCH (enhanced Physical Downlink Control Channel strengthens Physical Downlink Control Channel) and send DCI information.

The same with DCI in OL UE, the NV UE use LTE/LTE-A system, MTC UE obtains DCI by demodulation PDCCH/ePDCCH channel, so that realize to PDSCH (Physical Downlink Share Channel, Physical Downlink Shared Channel) and separating of PUSCH (Physical Uplink Share Channel, Physical Uplink Shared Channel) be in harmonious proportion control.

Existing LTE/the LTE-A frame structure as shown in Figures 2 and 3.

Fig. 2 is the schematic diagram of the frame structure of FDD (Frequency Division Duplexing, the Frequency Division Duplexing (FDD)) pattern according to correlation technique.As shown in Figure 2, the radio frames of a 10ms is 0.5ms by 20 length, and the time slot (slot) of numbering 0～19 is formed, and it is subframe (subframe) i of 1ms that time slot 2i and 2i+1 form length.

Fig. 3 is TDD (the Time Division Duplexing according to correlation technique, time division duplex) schematic diagram of the frame structure of pattern, as shown in Figure 3, the radio frames of a 10ms is longly formed for the field of 5ms (half frame) by two, a field comprises that 5 length are the subframe of 1ms, and subframe i is defined as 2 and longly is time slot 2i and the 2i+1 of 0.5ms.

Because low-cost MTC terminal is when connecting system, because being full bandwidth, PDCCH interweaves, owing to may not receive whole control informations that big bandwidth sends PDCCH, cause to receive and detect PDSCH and then do not obtain publicly-owned information when receiving publicly-owned information, cause the terminal can't connecting system.

Following three kinds of downlink physical control channels have been defined among the LTE/LTE-A: physical down control format indicating channel (Physical Control Format Indicator Channel, abbreviate PCFICH as), the automatic repeat requests indicating channel of physical mixed (Physical Hybrid Automatic Retransmission Request Indicator Channel abbreviates PHICH as) and Physical Downlink Control Channel.

Wherein, the PCFICH loaded information is used in reference to the number that is shown in OFDM (Orthogonal Frequency Division Multiplexing the abbreviates OFDM as) symbol of transmission PDCCH in the subframe.PHICH is used to carry acknowledgement/non-acknowledgement (ACK/NACK) feedback information of uplink transmission data.PDCCH is used to carry DCI, comprising: uplink and downlink schedule information, and uplink power control information.For the DCI form in the LTE/LTE-A system, comprise

DCI Format

0,1,1A, 1B, 1C, 1D, 2,2A, 2B, 2C, 3,3A, 4.

The information that DCI Format 0 comprises has: the carrier wave indication, format 0/1A sign, the frequency hopping sign of PUSCH, PUSCH resource allocation and frequency hopping are distributed, MCS (Modulation Code Scheme, Modulation and Coding Scheme) grade and RV (Redundancy Version, redundancy versions), NDI (New Data Indicator, the new data indication), TPC (the Transmit Power Control of PUSCH to scheduling, transmitting power control) order, DM RS (Demodulation Reference Signal, demodulated reference signal) cyclic shift and OCC (Orthogonal Cover Code, the quadrature overlay code) index, the UL index, DAI (Downlink Assignment Index, descending allocation index), CSI (Channel State Information, channel condition information) request, SRS (Sounding Reference Signal, detection reference signal) request, the resource allocation type.

The information that DCI Format 1 comprises has: carrier wave indication, scheduling of resource head, resource allocation, MCS grade, HARQ (Hybrid Automatic Repeat Request, hybrid automatic repeat requests) process numbering, NDI, RV, to TPC order, the DAI of the PUCCH (Physical Uplink Share Channel, Physical Uplink Control Channel) of scheduling.

DCI Format 1A is using C-RNTI (Cell Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) information that comprises during scrambling has: carrier wave indication, format 0/1A sign, concentrate/discrete VRB (Virtual Resource Block, virtual resource blocks) assignment flag, resource allocation, preamble index, PRACH (Physical Random Access Channel, Physical Random Access Channel) cover index.

The information that DCI Format 1A comprises when not using the C-RNTI scrambling has: carrier wave indication, format0/1A sign, concentrate/discrete VRB assignment flag, resource allocation, MCS grade, HARQ process numbering, NDI, RV, to TPC order, the DAI of the PUCCH of scheduling.

The information that DCI Format 1B comprises has: carrier wave indication, concentrate/discrete VRB assignment flag, resource allocation, MCS grade, HARQ process numbering, NDI, RV, to TPC order, DAI, TPMI (the Transmitted Precoding Matrix Indicator of the PUCCH of scheduling, the indication of transfer pre-coding matrix) precoding information, PMI (Precoding Matrix Indicator, pre-coding matrix indication) confirmation.

The information that DCI Format 1C comprises when being used for 1 PDSCH scheduling has: gap indicated value, resource allocation, MCS.

The information that DCI Format 1C comprises when being used to notify MCCH (Multicast Control Channel, multicast control channel) to change has: MCCH changes announcement information.

The information that DCI Format 1D comprises has: carrier wave indication, concentrate/discrete VRB assignment flag, resource allocation, MCS grade, HARQ process numbering, NDI, RV, to TPC order, DAI, TPMI precoding information, the descending power skew of the PUCCH of scheduling.

The information that DCI Format 2 comprises has: carrier wave indication, scheduling of resource head, resource allocation, to TPC order, DAI, HARQ process numbering, transmission block code word switching mark, the MCS grade of transmission block 1, NDI, the RV of transmission block 1 of transmission block 1, the MCS grade of transmission block 2, NDI, the RV of transmission block 2 of transmission block 2, the precoding information of the PUCCH of scheduling.

The information that DCI Format 2A comprises has: carrier wave indication, scheduling of resource head, resource allocation, to TPC order, DAI, HARQ process numbering, transmission block code word switching mark, the MCS grade of transmission block 1, NDI, the RV of transmission block 1 of transmission block 1, the MCS grade of transmission block 2, NDI, the RV of transmission block 2 of transmission block 2, the precoding information of the PUCCH of scheduling.

The information that DCI Format 2B comprises has: carrier wave indication, scheduling of resource head, resource allocation, to TPC order, DAI, HARQ process numbering, scramble confirmation, SRS request, the MCS grade of transmission block 1, NDI, the RV of transmission block 1 of transmission block 1, the MCS grade of transmission block 2, the NDI of transmission block 2, the RV of transmission block 2 of the PUCCH of scheduling.

The information that DCI Format 2C comprises has: carrier wave indication, scheduling of resource head, resource allocation, to TPC order, DAI, HARQ process numbering, antenna port and the scramble confirmation of the PUCCH of scheduling and the number of plies, SRS request, the MCS grade of transmission block 1, NDI, the RV of transmission block 1 of transmission block 1, the MCS grade of transmission block 2, the NDI of transmission block 2, the RV of transmission block 2.

The information that DCI Format 3 comprises has: be numbered 1 TPC order, be numbered 2 TPC order ..., be numbered N the TPC order (

L _Format0=format 0 adds the preceding bit number of CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC))).

The information that DCI Format 3A comprises has: be numbered 1 TPC order, be numbered 2 TPC order ..., be numbered the TPC order (M=L of N _Format0, L _Format0=format 0 adds the bit number before the CRC).

The information that DCI Format 4 comprises has: carrier wave indication, resource allocation, to TPC order, DM RS cyclic shift and OCC index, UL index, antenna port and the scramble confirmation of the PUSCH of scheduling and the number of plies, DAI, CSI request, SRS request, resource allocation type, the MCS grade of transmission block 1, the NDI of transmission block 1, the MCS grade of transmission block 2, the NDI of transmission block 2.

The limited MTC UE of low-cost reception antenna the problem that covering performance descends can occur in the LTE system, and low-cost MTC UE since not technology such as multiplexing, the MIMO of support space can all not use above-mentioned numerous DCI form and corresponding transmission mode yet.In addition, consider enhancing,, also can bring the excessive problem of expense even existing part DCI form can be applied to low-cost MTC UE to covering performance.

Limited at the limited MTC UE of low-cost reception antenna covering performance in the LTE system, and then, effective solution is not proposed as yet at present at the information transmission process that low-cost MTC UE design is fit to.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of downlink control information sending method and base station, remedy low-cost MTC terminal in the LTE system because the limited covering problem that causes of reception antenna.

In order to address the above problem, the invention provides a kind of sending method of Downlink Control Information, comprising:

Subscriber equipment is given by Physical Downlink Shared Channel (PDSCH) publicly-owned information of transmission or user special information in the base station, and indicates by the Downlink Control Information (DCI) of control channel carrying, and the bandwidth that described PDSCH takies is less than system bandwidth.

Further, said method also can have following characteristics, when transmitting described publicly-owned information, uses to send diversity transmission mode.

Further, said method also can have following characteristics, and when transmitting described user special information, the fixing use sends diversity transmission mode, perhaps, in the single antenna port transmission and send select in the diversity transmission mode a kind of.

Further, said method also can have following characteristics, when use sending diversity transmission mode and transmitting described PDSCH, uses sub-district special reference signal CRS or demodulated reference signal DMRS pilot tone.

Further, said method also can have following characteristics, and the frequency domain resource of described PDSCH and/or PDCCH is the full bandwidth of described subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth.

Further, said method also can have following characteristics, and described control channel is for strengthening the Physical Downlink Control Channel of Physical Downlink Control Channel or redetermination.

Further, said method also can have following characteristics, and described base station sends described publicly-owned information or user special information on predefined subframe.

Further, said method also can have following characteristics, and described DCI is one of following form:

Format 1A, Format 1C; The form of redetermination;

Wherein the form of this redetermination comprises following information:

DCI format identification (FID), resource block assignments, Modulation and Coding Scheme MCS, hybrid automatic repeat requests HARQ process number, new data indication NDI, transmitting power control TPC order, descending allocation index, the transmission mode of the Physical Uplink Control Channel PUCCH of scheduling identified;

Perhaps,

DCI format identification (FID), centralized/distributed virtual resource block VRB assignment flag position, resource block assignments, MCS, HARQ process number, NDI, TPC order, descending allocation index, the transmission mode of the PUCCH of scheduling identified;

Perhaps,

DCI format identification (FID), resource block assignments, MCS, HARQ process number, NDI, to TPC order, the descending allocation index of the PUCCH of scheduling;

Perhaps,

DCI format identification (FID), centralized/distributed VRB assignment flag position, resource block assignments, MCS, HARQ process number, NDI, to TPC order, the descending allocation index of the PUCCH of scheduling;

Perhaps,

DCI format identification (FID), resource block assignments, MCS, NDI, TPC order, descending allocation index, the transmission mode of the PUCCH of scheduling identified;

Perhaps,

DCI format identification (FID), centralized/distributed VRB assignment flag position, resource block assignments, MCS, NDI, TPC order, descending allocation index, the transmission mode of the PUCCH of scheduling identified;

Perhaps,

DCI format identification (FID), resource block assignments, MCS, NDI, to TPC order, the descending allocation index of the PUCCH of scheduling;

Perhaps,

DCI format identification (FID), centralized/distributed VRB assignment flag position, resource block assignments, MCS, NDI, to TPC order, the descending allocation index of the PUCCH of scheduling;

Wherein, described DCI format identification (FID) is used to indicate the DCI form; The transmission mode that described transmission mode sign is used to indicate PDSCH.

Further, said method also can have following characteristics, and described transmission mode sign takies 1 bit.

Further, said method also can have following characteristics, and described DCI is Format 0, perhaps, is the form of redetermination,

The form of this redetermination comprises following information:

DCI format identification (FID), resource block assignments, MCS, NDI, to the cyclic shift DMRS CS of the TPC order of the Physical Uplink Shared Channel PUSCH of scheduling, demodulated reference signal and quadrature overlay code OCC index, up call number, descending allocation index;

Perhaps,

DCI format identification (FID), resource block assignments, MCS, NDI, to TPC order, DMRS CS and OCC index, up call number, descending allocation index, the channel condition information CSI request of the PUSCH of scheduling.

Further, said method also can have following characteristics, and described resource block assignments takies Bit or

Bit; Wherein, Be the difference of PRB index of two time slot correspondences of virtual resource blocks correspondence,

It is the RB number that downlink bandwidth contains;

Described MCS takies 4 bits or 3 bits or 2 bits or 1 bit.

Further, said method also can have following characteristics, and described DCI format identification (FID) takies 1 bit.

Further, said method also can have following characteristics, and the transmission block size of described PDSCH carrying is a kind of in the predefined k kind, and k is a natural number.

The present invention also provides a kind of base station, comprises,

The Downlink Control Information transmitting element be used for giving subscriber equipment by Physical Downlink Shared Channel (PDSCH) publicly-owned information of transmission or user special information, and the bandwidth that described PDSCH takies is less than system bandwidth;

Indicating member is used for publicly-owned information or user special information by the described PDSCH of Downlink Control Information (DCI) indication of control channel carrying.

Further, above-mentioned base station also can have following characteristics, when described Downlink Control Information transmitting element transmits described publicly-owned information, uses to send diversity transmission mode.

Further, above-mentioned base station also can have following characteristics, and when described Downlink Control Information transmitting element transmitted described user special information, the fixing use sent diversity transmission mode, perhaps, in the single antenna port transmission and send select in the diversity transmission mode a kind of.

Further, above-mentioned base station also can have following characteristics, when described Downlink Control Information transmitting element uses and sends diversity transmission mode and transmit described PDSCH, uses sub-district special reference signal CRS or demodulated reference signal DMRS pilot tone.

Further, above-mentioned base station also can have following characteristics, and the frequency domain resource of described PDSCH and/or PDCCH is the full bandwidth of described subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth.

Further, above-mentioned base station also can have following characteristics, and described control channel is for strengthening the Physical Downlink Control Channel of Physical Downlink Control Channel or redetermination.

Further, above-mentioned base station also can have following characteristics, and described Downlink Control Information transmitting element sends described publicly-owned information or user special information on predefined subframe.

Further, above-mentioned base station also can have following characteristics, and described DCI is one of following form:

Format 1A, Format 1C; The form of redetermination;

Wherein the form of this redetermination comprises following information:

Perhaps,

Further, above-mentioned base station also can have following characteristics, and described transmission mode sign takies 1 bit.

Further, above-mentioned base station also can have following characteristics, and described DCI is Format 0, perhaps, is the form of redetermination,

The form of this redetermination comprises following information:

Perhaps,

Further, above-mentioned base station also can have following characteristics, and described resource block assignments takies

Bit or

Bit; Wherein,

Be the difference of PRB index of two time slot correspondences of virtual resource blocks correspondence, It is the RB number that downlink bandwidth contains;

Described MCS takies 4 bits or 3 bits or 2 bits or 1 bit.

Further, above-mentioned base station also can have following characteristics, and described DCI format identification (FID) takies 1 bit.

Further, above-mentioned base station also can have following characteristics, and the transmission block size of described PDSCH carrying is a kind of in the predefined k kind, and k is a natural number.

The method that the application of the invention proposed not only can solve the reception problem of publicly-owned information, can also remedy low-cost MTC terminal in the LTE system because the limited covering problem that causes of reception antenna.

Description of drawings

The control channel exemplary plot that Fig. 1 carries low-cost MTC terminal equipment DCI for support of the present invention;

Fig. 2 is the FDD of a LTE/LTE-A system frame structure;

Fig. 3 is a LTE/LTE-A system TDD frame structure;

Fig. 4 is predefined subframe schematic diagram for the described PDSCH of the embodiment of the invention sends subframe;

Fig. 5 is embodiment of the invention base station block diagram.

Embodiment

For making technical scheme of the present invention clearer, the present invention is further elaborated below in conjunction with the drawings and specific embodiments.Need to prove that under the situation of not conflicting, embodiment and the variety of way among the embodiment among the application can make up mutually.

The sending method of the described Downlink Control Information of the embodiment of the invention, preferably low-cost MTCUE is suitable for but does not get rid of other types UE, comprises different sending methods, transmission mode and the pairing control signaling thereof of different kinds of information simultaneously.

The embodiment of the invention provides a kind of sending method of Downlink Control Information, comprising: the base station adopts the transmission diversity transmission mode that publicly-owned information directly is transferred to subscriber equipment by PDSCH.

Wherein, send diversity transmission mode and use measuring reference signals CRS or demodulated reference signal DMRS pilot tone down.

Wherein, described base station sends described publicly-owned information on subframe 0 and/or subframe 5.

Wherein, described PDSCH bandwidth is less than system bandwidth.Preferably, be not more than the bandwidth that receives this subscriber equipment access.

Wherein, the frequency domain resource of described PDSCH is the full bandwidth of this subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth, and this subscriber equipment comprises low-cost subscriber equipment, also other subscriber equipmenies.

Wherein, described base station uses default Radio Network Temporary Identifier RNTI that described PDSCH is carried out scrambling.

Wherein, the transmission block size of described PDSCH carrying is a kind of in the predefined k kind, and k is a natural number.

The embodiment of the invention also provides a kind of detection method of Downlink Control Information, comprising:

The Physical Downlink Shared Channel (PDSCH) that the subscriber equipment blind Detecting carries publicly-owned information obtains described publicly-owned information.

Wherein, the described subscriber equipment blind Detecting PDSCH that carries publicly-owned information comprises:

Described subscriber equipment is at subframe 0 and/or the described PDSCH of subframe 5 blind Detecting.

Wherein, described blind Detecting is to be that unit carries out blind Detecting with one or more Resource Block RB.

The embodiment of the invention also provides a kind of sending method of Downlink Control Information, comprising:

The base station transmits publicly-owned information by PDSCH or user special information is given subscriber equipment, and indicates by the Downlink Control Information (DCI) of control channel carrying, and the bandwidth that described PDSCH takies is less than system bandwidth.

Wherein, described subscriber equipment comprises low-cost subscriber equipment.

Wherein, when transmitting described publicly-owned information, use to send diversity transmission mode.

Wherein, when transmitting described user special information, the fixing use sends diversity transmission mode, perhaps, in the single antenna port transmission and send select in the diversity transmission mode a kind of.

Wherein, when use sending diversity transmission mode and transmitting described PDSCH, use sub-district special reference signal (CRS) or DMRS pilot tone.

Wherein, the frequency domain resource of described PDSCH and/or PDCCH is the full bandwidth of described subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth.

Wherein, described control channel is for strengthening the Physical Downlink Control Channel of Physical Downlink Control Channel or redetermination.

Wherein, described base station sends described publicly-owned information or user special information on predefined subframe.For example be subframe 0 ..., the subclass of 9} set.

Wherein, described DCI is one of following form:

Format 1A, Format 1C; The form of redetermination; This form can use Format 1E sign, and this sign only is an example, also can use other to be different from the sign of the DCI Format that has used as required, and the present invention does not limit this.

Wherein the form of this redetermination comprises following information:

Perhaps,

Wherein, described transmission mode sign takies 1 bit.

Wherein, described DCI is Format 0, perhaps, is the form of redetermination, and this form can use the Format0A sign, and this sign only is an example, also can use other to be different from the sign of the DCI Format that has used as required, and the present invention does not limit this.

The form of this redetermination comprises following information:

Perhaps,

Wherein, described resource block assignments takies

Bit or

Bit;

Described MCS takies 4 bits or 3 bits or 2 bits or 1 bit.

Wherein, described DCI format identification (FID) takies 1 bit.

Wherein, publicly-owned information comprises system message, paging information, random access feedback information.

Further, UE blind Detecting control channel is according to the DCI of control channel carrying and then the PDSCH of acquisition publicly-owned information of carrying or user special information;

Further, the transmission subframe of described publicly-owned information is predefined subframe, and preferably subframe 0 and/or subframe 5 also can be other subframes, as shown in Figure 4, take

subframe

1 and 6, perhaps, only take subframe 1, but are not limited in these three kinds.

Further, the DCI Format that supported of newly-designed low-cost MTC terminal (removing DCI Format3/3A) has only UL Format MTC (also can be called Format 0A)/DL Format MTC (also can be called Format 1E)

Further, uplink transmission mode is only supported the transmission means of single antenna port transmission.

Further, when low-cost MTC used newly-designed DCI form, resource distribution mode was only supported a kind of continuous resource method of salary distribution type2, does not support frequency hopping.The MCS grade only supports that high modulation exponent number is the mode of QPSK or 16QAM.The HARQ process is supported 2 processes at most, gets final product with the 1bit indication.Only support cycle CSI feedback or aperiodic the CSI feedback.

Further, when using single antenna port transmission pattern, N_SCID is predefine value 0 or 1.A required parameter of employed wherein a kind of pilot frequency sequence initialization when N_SCID is single antenna port transmission pattern.In the concrete visible 3GPP agreement 36.211 shown in the 6.10.3.1 trifle.

The receive diversity that reduces to remove UE to radio frequency link promptly keeps single antenna, directly causes the reduction of UE covering performance.Can promote covering performance by the Compact DCI Format that designs suitable low-cost MTC UE also can reduce cost.

Further related content is described below.

1, for blind Detecting PDSCH, similar with the PDCCH blind Detecting, detect the RNTI of its CRC scrambling.PDSCH occupies the full bandwidth or the predefined part bandwidth of system, and system bandwidth is divided into n part, and Low Cost UE is by a part detection;

Scheme 1: when system bandwidth is 1.4MHz, 6RB is arranged, be divided into 6 parts, when PDSCH occupies full bandwidth and is that resource units distributes with 1RB, Low Cost UE carries out blind Detecting according to each RB in 6RB.

Scheme 2: when system bandwidth is 5MHz, 25RB is arranged, be divided into 6 parts, when the ply in the centre predefine bandwidth of 6RB and be that resource units distributes with 2RB of PDSCH, Low Cost UE carries out blind Detecting according to per 2 RB in the predefine bandwidth.

Scheme 3: when system bandwidth is 1.4MHz, 6RB is arranged, be divided into 3 parts, when PDSCH occupies full bandwidth and is that resource units distributes with 2RB, Low Cost UE carries out blind Detecting according to per 2 RB in 6RB.

Scheme 4: when system bandwidth is 1.4MHz, 6RB is arranged, be divided into 3 parts, when PDSCH occupies the predefine bandwidth of 4RB and is that resource units distributes with 2RB, Low Cost UE carries out blind Detecting according to per 2 RB in 4RB.

Scheme 5: when system bandwidth is 1.4MHz, 6RB is arranged, be divided into 1 part, promptly PDSCH is that resource units distributes with 6RB, and Low Cost UE carries out blind Detecting according to per 6 RB.

2, the transmission mode of being supported for low-cost MTC terminal for sending the transmission mode of diversity, perhaps, comprises the transmission mode of single antenna port and the transmission mode of the transmission mode that sends diversity simultaneously.

(a) during the downlink transfer pattern,, adopt descending control information format DCI Format 1E to represent transmission means, shown in table 1 or 2 in the common search space with in the proprietary search volume of subscriber equipment of C-RNTI, SPS C-RNTI definition.When adopting the transmission mode of transmission mode that comprises the single antenna port simultaneously and the transmission mode that sends diversity, increase 1bit among the DCI Format 1E to show differentiation.

Table 1PDCCH and PDSCH configured by C-RNTI or SPS-RNTI

Table 2PDCCH and PDSCH configured by C-RNTI or SPS-RNTI

(b) during uplink transmission mode,, adopt descending control information format DCI Format 0A to represent transmission means in the common search space with in the proprietary search volume of subscriber equipment of C-RNTI, SPS C-RNTI definition, as shown in table 3.

Table 3PDCCH and PDSCH configured by C-RNTI or SPS-RNTI

3. for the sub-frame configuration setting of transmission information, when transmission during publicly-owned information, the transmission subframe of publicly-owned information preferably comprise subframe 0 and or subframe 5 but be not limited only to this; When transmission during Proprietary Information, the subframe of transmitting described PDCCH is the predefine subframe, for example be subframe 0 ..., the subclass that 9} gathers.

Scheme 1: for the subframe of transmission Proprietary Information pairing control channel is all ten subframes in 1 frame, promptly 0 ..., 9}, or any one or more subframes in 1 frame are fit to every subframe dynamic dispatching.

Scheme 2: for the subframe of transmission Proprietary Information pairing control channel is five subframes in 1 frame, as 0,2,4,6,8} or { 1,3,5,7,9} is fit to stride frame scheduling.

4. the corresponding MCS grade of transmission block size for described PDSCH carrying is a predefine k kind, and k is a natural number, see the 5th described, when being restricted to the QPSK modulation system set of the value of k for 1,2,4,8}; When being restricted to the 16QAM modulation system value of k set for 1,2,4,8,16}; The value of k is 32 kinds when not limiting the MCS grade; When the transmission block size is a predefine k kind, its possible value be 1,2,4,8}, this moment, modulation system was fixed as one of QPSK or 16QAM.

5. in Compact DCI Format design, a kind of resource distribution mode for only supporting has following several situation:

(a) only support resource distributes DVRB mode among the type type2.This consideration mainly is to consider to reduce the resource allocation bit territory.Need

Bit, for example when low-cost MTC UE bandwidth was 1.4MHz, its resource requirement allocation bit territory only needed 3bit.This scheme advantage is to use less bit to help the lifting of covering performance.

(b) only support resource distributes LVRB mode among the type type2.Granularity when this consideration is Resources allocation can be unit with 1RB.Need Bit, when for example low-cost MTCUE bandwidth was 1.4MHz, its resource requirement allocation bit territory needed 5bit.The advantage of this scheme is resource allocation refinement more, can make more UE use resource simultaneously.

(c) support resource distributes type type2.Need to concentrate/discrete VRB assignment flag 1bit (being set to ' 0 ' expression LVRB) and resource block assignments Bit, when for example low-cost MTC UE bandwidth was 1.4MHz, its resource requirement allocation bit territory needed 6bit.The advantage of this scheme is that resource allocation is more flexible.

For MCS grade bit field, following several situation is arranged:

(a) the employed modulation skill of restriction is up to 16QAM.The advantage of this kind scheme is fully to guarantee system's average spectral efficiency (ase).Further can be subdivided into following several situation:

(a1) the MCS grade uses 4bit to represent, totally 16 kinds of situations.For example, as shown in table 1.Other in existing MCS grade 0-16 totally 17 kinds choose wherein that 16 kinds combination is all included.

Table 1MCS grade

(a2) the MCS grade uses 3bit to represent, totally 8 kinds of situations.For example: as shown in table 2.

Other in existing MCS grade 0-16 totally 17 kinds choose wherein that 8 kinds combination is all included.

Table 2MCS grade

(a3) the MCS grade uses 2bit to represent, totally 4 kinds of situations.For example: as shown in table 3.

Other in existing MCS grade 0-16 totally 17 kinds choose wherein that 4 kinds combination is all included.

Table 3MCS grade

(a4) the MCS grade uses 1bit to represent, totally 2 kinds of situations.For example: as shown in table 4.

Other in existing MCS grade 0-16 totally 17 kinds choose wherein that 2 kinds combination is all included.

Table 4MCS grade

(a5) do not use MCS grade bit field, promptly only support a kind of MCS grade.For example: as shown in table 5.Other in existing MCS grade 0-16 totally 17 kinds choose wherein that a kind combination is all included.

Table 5MCS grade

(b) the employed modulation skill of restriction is up to QPSK.The advantage of this scheme is to reduce the MCS bit field on the basis of gsm system as far as possible and reduce the processing complexity simultaneously guaranteeing that spectrum efficiency is not less than.

Further can be subdivided into following several situation:

(b1) the MCS grade uses 3bit to represent, totally 8 kinds of situations.For example: as shown in table 6.

Other in existing MCS grade 0-9 totally 10 kinds choose wherein that 8 kinds combination is all included.

Table 6MCS grade

(b2) the MCS grade uses 2bit to represent, totally 4 kinds of situations.For example: as shown in table 7.

Other in existing MCS grade 0-9 totally 10 kinds choose wherein that 4 kinds combination is all included.

Table 7MCS grade

(b3) the MCS grade uses 1bit to represent, totally 2 kinds of situations.For example: as shown in table 8.

Other in existing MCS grade 0-9 totally 10 kinds choose wherein that 2 kinds combination is all included.

Table 8MCS grade

(b4) do not use MCS grade bit field, promptly only support a kind of MCS grade.For example: as shown in table 9.Other in existing MCS grade 0-9 totally 10 kinds choose wherein that a kind combination is all included.

Table 9MCS grade

For HARQ number of processes bit field, following several situation is arranged:

(a) use 1bit indication HARQ process number, promptly support 2 HARQ processes.This consideration mainly is in order to guarantee the demand of burst service to the HARQ process, and the periodic report business only uses a HARQ process to get final product.

(b) do not use the HARQ process to count bit field, promptly only support 1 HARQ process.Mainly for easy to operate simple, all customer services are all used a process in this consideration.

As follows for employed transmission mode corresponding DCI format 0A of institute of low-cost MTC terminal and the concrete scheme of DCI format 1E.

Scheme 1:

Be used for field that the DCI form of low-cost MTC UE defines below corresponding to information bit a ₀To a _A-1

Each field (if any, in 0 bit of filling is also included within) is shone upon according to the order that occurs in describing below, and first field mappings is to minimum information position a ₀, ensuing field mappings is to high information bit.The highest significant position of each field is mapped to the minimum information position of corresponding field, and for example, the highest significant position of first field is mapped to a ₀

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

Sign---1 bit that-form 0A and form 1E distinguish, wherein: " 0 " presentation format 0A, " 1 " presentation format 1E, certainly, and also can " 1 " presentation format 0A, " 0 " presentation format 1E; The present invention does not limit this.

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein,

6.2.3.2 joint in 36.211 is seen in definition,

7.1.6.3 joint in 36.213 is seen in definition

-Modulation and Coding Scheme---3 bits are seen the description of MCS grade in the embodiment

-new data indication---1 bit

Transmission power control command---the 2 bits of-PUSCH that is scheduled are seen 36.213 5.1.1.1 trifle definition

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

-up call number---2 bits are seen 36.213 the 8th joint and 5.1.1.1,7.1.2 and 8.4 trifles definition (this field only appears at the uplink-downlink configuration 0 of TD-LTE)

-descending allocation index---2 bits are seen 36.213 7.3 trifles definition (this field only appears at TD-LTE uplink-downlink configuration 1-6)

If the information bit bits number of form 0A is less than the payload size (comprising any filling bit that adds form 1E to) of form 1E, form 0A must fill 0 and equal the payload size of form 1E up to the payload size.

Format?1E

DCI form 1E is used for a PDSCH code word and is ordered the compression scheduling of the process of initiating that inserts at random by a PDCCH.

Following information is transmitted by DCI form 1E:

Only when the CRC of DCI form 1E used C-RNTI to carry out scrambling, form 1E was used for the access process at random by PDCCH order initiation, and remaining field is provided with as follows:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

All the other bits that are used for the compression scheduling of a PDSCH code word among the-form 1E all are arranged to 0

Otherwise,

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

Transmission power control command---the 2 bits of-PUCCH that is scheduled are seen 36.213 5.1.2.1 trifle definition

-transmission mode sign---1bit, 0 expression single antenna port transmission, 1 expression sends diversity transmission mode (when only supporting to send diversity transmission mode, then not this bit field).Certainly, also can 1 expression single antenna port transmission, 0 expression sends diversity transmission mode, the present invention does not limit this.

Certainly, sign that form 0A and form 1E distinguish and transmission mode sign also can use the mode of 2 bit combined codings to indicate, and the present invention does not limit this.

If the information bit bits number of form 1E is less than the payload size (comprising any filling bit that adds form 0A to) of form 0A, form 1E must fill 0 and equal the payload size of form 0A up to the payload size.

Scheme 2:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

Sign---1 bit that-form 0A and form 1E distinguish, wherein: " 0 " presentation format 0A, " 1 " presentation format 1E

-resource block assignments---

Bit

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

Format?1E

Following information is transmitted by DCI form 1E:

Only when the CRC of DCI form 1A used C-RNTI to carry out scrambling, form 1A was used for the access process at random by PDCCH order initiation, and remaining field is provided with as follows:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

-transmission mode sign---1bit, 0 expression single antenna port transmission, 1 expression sends diversity transmission mode (when only supporting to send diversity transmission mode, then not this bit field).

Scheme 3:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

-resource block assignments---

Bit

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

Format?1E

Following information is transmitted by DCI form 1E:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-centralized/distributed VRB assignment flag position---1 bit is seen 7.1.6.3 joint in 36.213

Definition

-resource block assignments--- Bit

-HARQ process number---1 bit

-new data indication---1 bit

Scheme 4:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein,

Definition sees 36.211,

Definition sees 36.213

-Modulation and Coding Scheme---2 bits are seen the description of MCS grade in the embodiment

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

Format?1E

Following information is transmitted by DCI form 1E:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

Scheme 5:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

Sign---1 bit that-form 0A and form 1E distinguish, wherein: " 0 " presentation format 0A, " 1 " presentation format 1

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein,

Definition sees 36.211,

Definition sees 36.213

-Modulation and Coding Scheme---1 bit is seen the description of MCS grade in the embodiment

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

Format?1E

Following information is transmitted by DCI form 1E:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

Scheme 6:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein,

Definition sees 36.211, Definition sees 36.213

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

Format?1E

Following information is transmitted by DCI form 1E:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-resource block assignments---

Bit

-new data indication---1 bit

Scheme 7:

Wherein, DCI form 0A, 1E, 3 identical with the magnitude of load of 3A.

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein, Definition sees 36.211,

Definition sees 36.213

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

-CSI request---1 bit is seen 36.213 7.2.1 trifle definition

Format?1E

Following information is transmitted by DCI form 1E:

-insert pilot frequency sequence number---6 bits at random

-PRACH mask number---4 bits

Otherwise,

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

In above-mentioned each scheme, each field mappings also can change to the mode of information bit, and the mapping order also can change, and above-mentioned is a kind of example only, and the present invention does not limit this.

Further specify the present invention below by specific embodiment.

Embodiment 1

When eNB transmitting system information is given UE, only use PDSCH to carry this information and do not indicate by PDCCH.

System information is carried among the PDSCH, sends in

subframe

0 and 5, adopts the QPSK modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 2 RB at full bandwidth, adopts the transmission mode that sends diversity.

When UE receives this publicly-owned information, carry out blind Detecting in subframe 0 and 5.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, in the search volume in whole bandwidth, according to 2RB is that unit carries out blind Detecting, detect successively among 6 RB and be numbered 1,2}, 3,4}, 5, the RB of 6}, in the 3rd group, detect, then the RB numbering 5, k kind TBS is detected among the 6}.

Embodiment 2

When eNB sends publicly-owned information to UE, only use PDSCH to carry this information and do not indicate by PDCCH.

Publicly-owned information-bearing sends in

subframe

0 and 5 in PDSCH, adopts the QPSK modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 2 RB in predefine bandwidth 4RB, adopt the transmission mode that sends diversity.

When UE receives this publicly-owned information, carry out blind Detecting in subframe 0 and 5.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, in the search volume in the predefine bandwidth, is that unit carries out blind Detecting according to 2RB then.

For embodiment 1, adoptable modulation system can also be that other are as BPSK, 16QAM etc. except QPSK; The RB that takies can be 1,2,3,4,5,6 RB or more but less than 50RB; Combination during blind Detecting RB can be multiple, chooses the combination of 2 RB (or other RB numbers that take) among 6 RB (or RB value of other bandwidth correspondences).

For embodiment 2, except that described, also have the predefine bandwidth can be x RB, x is 1,2 ..., 6 RB or more but less than system bandwidth.

Embodiment 3

When eNB sent publicly-owned information to UE, use PDSCH carried this information and indicates by the DCI that PDCCH carried.

Publicly-owned information-bearing sends in

subframe

0 and 5 in PDSCH, adopts the QPSK modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 1 RB in full bandwidth 6RB, adopt the transmission mode that sends diversity.

When UE receives this publicly-owned information, carry out blind Detecting PDCCH in subframe 0 and 5.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the common search space in full bandwidth, carry out blind Detecting according to CCE polymerization grade and detect DCI Format 1A, obtain after the DCI and then obtain publicly-owned information among the PDSCH.

Being configured to of transmission mode this moment:

Embodiment 4

When eNB sent publicly-owned information to UE, use PDSCH carried this information and indicates by the Compact DCI that ePDCCH carried.

Publicly-owned information-bearing sends in

subframe

0 and 5 in PDSCH, adopts the QPSK modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 2 RB in full bandwidth 6RB, adopt the transmission mode that sends diversity.

When UE receives this publicly-owned information, carry out blind Detecting ePDCCH in subframe 0 and 5.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the common search space in full bandwidth, according to 2RB is that unit carries out blind Detecting and detects DCI Format 1E, obtains after the DCI and then obtains publicly-owned information among the PDSCH.

Being configured to of transmission mode this moment:

DCI Format 1E this moment is configured to:

Format?1E

Following information is transmitted by DCI form 1E:

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

This embodiment can carry out as down conversion: use different DCI configurations; The configuration of the different number of bits of DCI format 1E; The RB number that PDSCH takies can be 1,2,3,4,5,6 RB or more but less than system bandwidth; The RB number that ePDCCH takies can be 1,2,4,8RB.

Embodiment 5

When eNB sent Proprietary Information to UE, use PDSCH carried this information and indicates by the DCI that PDCCH carried.

Proprietary Information is carried among the PDSCH, sends in predefine subframe 0 to 9, and modulation system is not limited, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 1 RB in full bandwidth 6RB, adopt the transmission mode that sends diversity.

When UE receives this Proprietary Information, carry out blind Detecting PDCCH in predefine subframe 0 to 9.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the proprietary search volume in full bandwidth, carry out blind Detecting DCI Format 1A according to CCE polymerization grade, obtain after the DCI and then obtain Proprietary Information among the PDSCH.

Being configured to of transmission mode this moment:

DCI Format 1E this moment is configured to:

Format?1E

Following information is transmitted by DCI form 1E:

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

Embodiment 6

When eNB sent Proprietary Information to UE, use PDSCH carried this information and indicates by the Compact DCI that PDCCH carried.

Proprietary Information is carried among the PDSCH, sends in predefine subframe 0 to 9, adopts the QPSK modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 1 RB in full bandwidth 6RB, adopt the transmission mode of single antenna port.

When UE receives this Proprietary Information, carry out blind Detecting PDCCH in predefine subframe 0 to 9.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the proprietary search volume in full bandwidth, according to 1RB is that unit carries out blind Detecting DCI Format 1E, obtains after the DCI and then obtains Proprietary Information among the PDSCH.

Being configured to of transmission mode this moment:

Wherein, when using CRS, port has only 1, is the single antenna port

DCI Format 1E this moment is configured to:

Format?1E

Following information is transmitted by DCI form 1E:

-resource block assignments---

Bit

-HARQ process number---1 bit

-new data indication---1 bit

Embodiment 7

When eNB sent Proprietary Information to UE, use PDSCH carried this information and indicates by the Compact DCI that ePDCCH carried.

Proprietary Information is carried among the PDSCH, and { 0,2,4,6,8} sends, and adopts the 16QAM modulation, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 2 RB in full bandwidth 6RB, adopt the transmission mode that sends diversity in the predefine subframe.

When UE received this Proprietary Information, { 0,2,4,6,8} carried out blind Detecting ePDCCH in the predefine subframe.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the proprietary search volume in full bandwidth, according to 2RB is that unit carries out blind Detecting DCI Format 1E, obtains after the DCI and then obtains Proprietary Information among the PDSCH.

Being configured to of transmission mode this moment:

DCI Format 1E this moment is configured to:

Format?1E

Following information is transmitted by DCI form 1E:

-resource block assignments---

Bit

-Modulation and Coding Scheme---4 bits are seen the description of MCS grade in the embodiment

-new data indication---1 bit

Embodiment 8

Proprietary Information is carried among the PDSCH, sends in predefine subframe 0 to 9, adopts the QPSK modulation system, and a kind of as in the k kind of the TBS that uses occupies the bandwidth of 2 RB in full bandwidth 6RB, adopt the transmission mode of single antenna port.

When UE receives this Proprietary Information, carry out blind Detecting PDCCH in predefine subframe 0 to 9.Whether UE is the information of issuing oneself according to the RNTI detection of the additional CRC institute scrambling of message, then in the proprietary search volume in full bandwidth, carry out blind Detecting DCI Format 0A according to CCE polymerization grade, obtain after the DCI and then obtain Proprietary Information among the PDSCH.

Being configured to of transmission mode this moment:

DCI Format 0A this moment is configured to:

Format?0A

DCI form 0A is used for the PUSCH scheduling.

Following information is transmitted by DCI form 0A:

-resource block assignments---

Bit is seen 7.1.6.3 definition in 36.213.Wherein,

Definition sees 36.211,

Definition sees 36.213

-new data indication---1 bit

-DMRS CS and OCC index---3 bits are seen the 5.5.2.1.1 trifle definition of [1]

This embodiment can carry out as down conversion: use different DCI configurations; The configuration of the different number of bits of DCI format 1E; The configuration of the different number of bits of DCI format 0A; The RB number that PDSCH takies can be 1,2,3,4,5,6 RB or more but less than system bandwidth; The RB number that ePDCCH takies can be 1,2,4,8RB; Different transmission mode settings; The predefine subframe can be the combination in any in 0 to 9;

In the embodiment of the invention, publicly-owned information can be in same sub and/or the transmission of different subframe with user special information.

The embodiment of the invention also provides a kind of base station, as shown in Figure 5, comprising:

Wherein, DCI form reference method embodiment.

Wherein, when described Downlink Control Information transmitting element transmits described publicly-owned information, use to send diversity transmission mode.

Wherein, when described Downlink Control Information transmitting element transmitted described user special information, the fixing use sent diversity transmission mode, perhaps, in the single antenna port transmission and send select in the diversity transmission mode a kind of.

Wherein, when described Downlink Control Information transmitting element uses and sends diversity transmission mode and transmit described PDSCH, use sub-district special reference signal CRS or demodulated reference signal DMRS pilot tone.

Wherein, described Downlink Control Information transmitting element sends described publicly-owned information or user special information on predefined subframe.

DCI form reference method embodiment.

In the embodiment of the invention, by removing DCI, directly in PDSCH, transmit publicly-owned information, UE directly detects PDSCH and obtains publicly-owned information, avoid UE because limited bandwidth causes receiving the control information of PDCCH, the problem that causes detecting PDSCH and can't obtain publicly-owned information, in addition, owing to remove DCI, saved the control information expense, in addition, use little bandwidth to send PDSCH, can make things convenient for UE to receive.In another embodiment of the present invention, reduce the size of DCI Format by Compact DCI Format, thereby reduced control information, improved covering performance.

The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.

Claims

1. the sending method of a Downlink Control Information is characterized in that,

2. the method for claim 1 is characterized in that, when transmitting described publicly-owned information, uses to send diversity transmission mode.

3. the method for claim 1 is characterized in that, when transmitting described user special information, the fixing use sends diversity transmission mode, perhaps, in the single antenna port transmission and send select in the diversity transmission mode a kind of.

4. as claim 1,2 or 3 described methods, it is characterized in that, when use sending diversity transmission mode and transmitting described PDSCH, use sub-district special reference signal CRS or demodulated reference signal DMRS pilot tone.

5. the method for claim 1 is characterized in that, the frequency domain resource of described PDSCH and/or PDCCH is the full bandwidth of described subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth.

6. the method for claim 1 is characterized in that, described control channel is for strengthening the Physical Downlink Control Channel of Physical Downlink Control Channel or redetermination.

7. the method for claim 1 is characterized in that, described base station sends described publicly-owned information or user special information on predefined subframe.

8. the method for claim 1 is characterized in that, described DCI is one of following form:

Format 1A, Format 1C; The form of redetermination;

Wherein the form of this redetermination comprises following information:

Perhaps,

9. method as claimed in claim 8 is characterized in that,

Described transmission mode sign takies 1 bit.

10. the method for claim 1 is characterized in that,

Described DCI is Format 0, perhaps, is the form of redetermination,

The form of this redetermination comprises following information:

Perhaps,

11. as claim 8,9 or 10 described methods, it is characterized in that,

Described resource block assignments takies

Bit or

Bit; Wherein,

Be the difference of PRB index of two time slot correspondences of virtual resource blocks correspondence,

It is the RB number that downlink bandwidth contains;

Described MCS takies 4 bits or 3 bits or 2 bits or 1 bit.

12. as claim 8,9 or 10 described methods, it is characterized in that,

Described DCI format identification (FID) takies 1 bit.

13., it is characterized in that the transmission block size of described PDSCH carrying is a kind of in the predefined k kind as claim 1 to 3,5 to 10 arbitrary described methods, k is a natural number.

14. a base station is characterized in that, comprises,

15. base station as claimed in claim 14 is characterized in that, when described Downlink Control Information transmitting element transmits described publicly-owned information, uses to send diversity transmission mode.

16. base station as claimed in claim 14, it is characterized in that when described Downlink Control Information transmitting element transmitted described user special information, the fixing use sent diversity transmission mode, perhaps, selection is a kind of in single antenna port transmission and transmission diversity transmission mode.

17. as claim 14,15 or 16 described base stations, it is characterized in that, when described Downlink Control Information transmitting element uses and sends diversity transmission mode and transmit described PDSCH, use sub-district special reference signal CRS or demodulated reference signal DMRS pilot tone.

18. base station as claimed in claim 14 is characterized in that, the frequency domain resource of described PDSCH and/or PDCCH is the full bandwidth of described subscriber equipment access bandwidth, perhaps, is the predefine part bandwidth of described subscriber equipment access bandwidth.

19. base station as claimed in claim 14 is characterized in that, described control channel is for strengthening the Physical Downlink Control Channel of Physical Downlink Control Channel or redetermination.

20. base station as claimed in claim 14 is characterized in that, described Downlink Control Information transmitting element sends described publicly-owned information or user special information on predefined subframe.

21. base station as claimed in claim 14 is characterized in that, described DCI is one of following form:

Format 1A, Format 1C; The form of redetermination;

Wherein the form of this redetermination comprises following information:

Perhaps,

22. base station as claimed in claim 21 is characterized in that,

Described transmission mode sign takies 1 bit.

23. base station as claimed in claim 14 is characterized in that,

Described DCI is Format 0, perhaps, is the form of redetermination,

The form of this redetermination comprises following information:

Perhaps,

24. as claim 21,22 or 23 described base stations, it is characterized in that,

Described resource block assignments takies Bit or

It is the RB number that downlink bandwidth contains;

Described MCS takies 4 bits or 3 bits or 2 bits or 1 bit.

25. as claim 21,22 or 23 described base stations, it is characterized in that,

Described DCI format identification (FID) takies 1 bit.

26. as claim 14 to 16,18 to 23 arbitrary described base stations is characterized in that, the transmission block size of described PDSCH carrying is a kind of in the predefined k kind, and k is a natural number.