CN108882366A

CN108882366A - A kind of transmission method and device of Downlink Control Information DCI

Info

Publication number: CN108882366A
Application number: CN201710320589.7A
Authority: CN
Inventors: 孙奇; 倪吉庆; 周伟
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2017-05-09
Filing date: 2017-05-09
Publication date: 2018-11-23
Anticipated expiration: 2037-05-09
Also published as: CN108882366B

Abstract

The present invention provides the transmission method and device of a kind of Downlink Control Information DCI, and this method includes：Obtain the DCI to be transmitted in down control channel；First order DCI is sent to user equipment, the first order DCI includes：The format information and downlink resource of second level DCI distributes information；The second level DCI is sent to the user equipment.Downlink Control Information to be transmitted in down control channel is divided into two-stage and transmitted by the embodiment of the present invention, and the bit number of first order DCI is fixed, then the blind examination number of first order DCI is less, improves transmission reliability under identical control channel resource；And it may thereby determine that second level DCI type comprising second level DCI format information in first order DCI, improve the reliability of transmission；And second level DCI is located in the downlink shared data channel of user's scheduling and transmits, and it can be with statistical multiplex downlink transfer resource, the limited problem of effective solution control channel capacity.

Description

A kind of transmission method and device of Downlink Control Information DCI

Technical field

The present invention relates to fields of communication technology, particularly relate to the transmission method and device of a kind of Downlink Control Information DCI.

Background technique

Down control channel is mainly used to transmit descending scheduling distribution information, uplink authorization in LTE (long term evolution) Information and some common control informations such as paging, random access response, the resource allocation information of system message and user group Power control information etc..Based on these purposes, the format (DCI of a variety of Downlink Control Information is devised in LTE system (downlink control information)format)).Specifically, distributing information for descending scheduling, LTE is defined DCI format1,1A, 1B, 1C, 1D, 2,2A etc. indicate respectively the transmission mode of different DSCH Downlink Shared Channels.User equipment (UE) The Downlink Control Information that base station is transferred to oneself is obtained by a variety of DCI format of blind Detecting.

But LTE down control channel design at present is primarily present following problem：

1. higher blind Detecting complexity：The bit number of the DCI format of different transmission mode is different, and user needs Blind Detecting is carried out between a variety of DCI format.

2. control channel capacity is limited：Control channel is usually transmitted in several OFDM symbols before each subframe, For the efficiency for guaranteeing data transmission, the occupied OFDM symbol number of control channel is usually less, causes control channel capacity limited.

3. control channel DCI design is not easy to extend, designed according to existing LTE, it is every to increase a kind of new transmission mode or biography Defeated feature needs to increase new DCI format or the signaling in DCI is reconfigured and designed, is not easy to subsequent skill The upgrading of art extends, and is based on this design, it cannot be guaranteed that version UE supports new transmission mode and feature before.

Summary of the invention

The purpose of the present invention is to provide the transmission methods and device of a kind of Downlink Control Information DCI, solve existing skill The problem that blind examination complexity is high under the DCI transmission mode of art and control channel capacity is limited.

In order to achieve the above object, the embodiment of the present invention provides the transmission method of Downlink Control Information DCI a kind of, including：

Obtain the DCI to be transmitted in down control channel；

First order DCI is sent to user equipment, the first order DCI includes：The format information of second level DCI and described The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in DCI to be transmitted；

The second level DCI is sent to the user equipment, the second level DCI includes：In the DCI to be transmitted in addition to Other control information except the downlink resource distribution information.

Wherein, the first order DCI also includes：

For the configuration information of demodulated reference signal and the modulation coding scheme of data to be transmitted；

Alternatively, the first order DCI also includes the configuration information for demodulated reference signal, and the second level DCI is also Modulation coding scheme comprising data to be transmitted；

Alternatively, the first order DCI also includes the modulation coding scheme of data to be transmitted, and the second level DCI is also wrapped Containing the configuration information for demodulated reference signal.

Wherein, described the step of sending first order DCI to user equipment, including：

First is sent to the user equipment on the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe Grade DCI.

Wherein, the first order DCI also includes：It is used to indicate the downlink shared data channel of the dispatching user facility Indicate information；

Described the step of sending the second level DCI to the user equipment, including：

The second level is sent to the user equipment in the downlink shared data channel of the dispatching user facility DCI；Wherein, the initial position for the time-domain resource that the second level DCI is occupied and the start bit of the downlink shared data channel It sets identical.

Wherein, the first order DCI also includes：The polymerization grade of second level DCI.

Wherein, the first order DCI also includes：The location information of the transfer resource of second level DCI；

Alternatively, the method also includes：The first radio resource control RRC signaling is sent to the user equipment；Wherein, The location information of the transfer resource of the second level DCI is carried in one RRC signaling.

Wherein, the first order DCI also includes：The position for the frequency domain resource that the second level DCI is occupied and described the The persistence length for the time-domain resource that second level DCI is occupied；

Alternatively, the method also includes：The second radio resource control RRC signaling is sent to the user equipment；Wherein, The time domain money that the position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in two RRC signalings occupy The persistence length in source.

Wherein, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and institute State the modulation coding scheme of second level DCI use；

Alternatively, the method also includes：Third radio resource control RRC signaling is sent to the user equipment；Wherein, The tune that the initial position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in three RRC signalings use Coding mode processed.

Wherein, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and to Transmit the modulation coding scheme of data.

Wherein, it is described in the downlink shared data channel of the dispatching user facility to the user equipment send described in The step of second level DCI, including：

Using transmission identical or different with the transmission mode of the downlink shared data channel of the dispatching user facility Mode sends the second level DCI to the user equipment in the downlink shared data channel.

The embodiment of the present invention provides the transmission method of Downlink Control Information DCI a kind of, including：

Detect and determine that first order DCI, the first order DCI include：The format information of second level DCI and one to be transmitted The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in DCI；

Determine the transfer resource position of second level DCI and the polymerization grade of second level DCI；

Received on the transfer resource position of the determining second level DCI with the format information of the second level DCI and The corresponding second level DCI of the polymerization grade of the second level DCI；Wherein, the second level DCI includes：In the DCI to be transmitted Other control information other than the downlink resource distributes information.

Wherein, the first order DCI also includes：For the configuration information of demodulated reference signal and the tune of data to be transmitted Coding mode processed；

Wherein, described the step of detecting and determining first order DCI, including：

Blind Detecting is carried out to the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe, determines first order DCI.

The step of transfer resource position of the determining second level DCI, including：

Determine the initial position for the time-domain resource that the second level DCI is occupied and the starting of the downlink shared data channel Position is identical.

Wherein, the first order DCI also includes：The polymerization grade of second level DCI；The polymerization of the determining second level DCI The step of grade, including：The polymerization grade of the second level DCI is determined according to the instruction of first order DCI.

Wherein, the first order DCI also includes：The location information of the transfer resource of second level DCI；The determining second level The step of transfer resource position of DCI, further include：Believed according to the position of the transfer resource of the first order DCI second level DCI for including Cease the transfer resource position for determining second level DCI；

Alternatively, the first order DCI also includes：The position for the frequency domain resource that the second level DCI is occupied and described the The persistence length for the time-domain resource that second level DCI is occupied；The step of transfer resource position of the determining second level DCI, further include： The time domain money occupied according to the position of the second level DCI that first order DCI the includes frequency domain resource occupied and the second level DCI The persistence length in source determines the transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and institute State the modulation coding scheme of second level DCI use；The step of transfer resource position of the determining second level DCI, further include：Root The modulation used according to the initial position and the second level DCI of the second level DCI that first order DCI the includes frequency domain resource occupied Coding mode determines the transfer resource position of second level DCI.

Wherein, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and to Transmit the modulation coding scheme of data；

The step of polymerization grade of the transfer resource position of the determining second level DCI and second level DCI, including：

According to the modulation coding scheme of the data to be transmitted, the modulation coding scheme that the second level DCI is used is determined With the polymerization grade of second level DCI；

The modulation used according to the initial position of the second level DCI frequency domain resource occupied and the second level DCI Coding mode determines the transfer resource position of second level DCI.

Wherein, the modulation coding scheme according to the data to be transmitted determines the modulation that the second level DCI is used The step of polymerization grade of coding mode and second level DCI, including：

Obtain the target modulation grade M of the modulation coding scheme of data to be transmitted；

Determine the first code rate of the data to be transmitted under the modulation coding scheme of M-N grade；N is integer predetermined；

If the difference between the second code rate of the second level DCI under the modulation coding scheme of M-N grade and first code rate Value determines that modulation coding scheme corresponding with the M-N grade is that the modulation that the second level DCI is used is compiled less than a preset value Code mode；

According to the modulation coding scheme that the second level DCI is used, the polymerization grade of second level DCI is determined.

Wherein, the step of transfer resource position of the determining second level DCI, including：

Receive the first radio resource control RRC signaling；Wherein, the transmission of the second level DCI is carried in the first RRC signaling The location information of resource；The transfer resource position of second level DCI is determined according to first RRC signaling；

Alternatively, receiving the second radio resource control RRC signaling；Wherein, the second level DCI is carried in the second RRC signaling The persistence length for the time-domain resource that the position of the frequency domain resource of occupancy and the second level DCI are occupied；According to the 2nd RRC Signaling determines the transfer resource position of second level DCI；

Alternatively, receiving third radio resource control RRC signaling；Wherein, wherein described second is carried in third RRC signaling The modulation coding scheme that the initial position for the frequency domain resource that grade DCI is occupied and the second level DCI are used；According to the third RRC signaling determines the transfer resource position of second level DCI.

The embodiment of the present invention also provides the transmitting device of Downlink Control Information DCI a kind of, including：

Module is obtained, for obtaining the DCI to be transmitted in down control channel；

First sending module, for sending first order DCI to user equipment, the first order DCI includes：Second level DCI Format information and the DCI to be transmitted in be used to indicate data to be transmitted running time-frequency resource position downlink resource distribution letter Breath；

Second sending module, for sending the second level DCI to the user equipment, the second level DCI includes：Institute State other control information in DCI to be transmitted other than the downlink resource distributes information.

Wherein, the first order DCI also includes：

Wherein, first sending module includes：

First sending submodule, on the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe to institute It states user equipment and sends first order DCI.

Second sending module includes：

Second sending submodule, for being set in the downlink shared data channel of the dispatching user facility to the user Preparation send the second level DCI；Wherein, the initial position for the time-domain resource that the second level DCI is occupied and the downlink are shared The initial position of data channel is identical.

Alternatively, described device further includes：First signaling sending module is wirelessly provided for sending first to the user equipment Source controls RRC signaling；Wherein, the location information of the transfer resource of the second level DCI is carried in the first RRC signaling.

Alternatively, described device further includes：Second signaling sending module is wirelessly provided for sending second to the user equipment Source controls RRC signaling；Wherein, the position of the frequency domain resource that the second level DCI is occupied and described is carried in the second RRC signaling The persistence length for the time-domain resource that second level DCI is occupied.

Alternatively, described device further includes：Third signaling sending module is wirelessly provided for sending third to the user equipment Source controls RRC signaling；Wherein, carried in third RRC signaling the frequency domain resource that the second level DCI is occupied initial position and The modulation coding scheme that the second level DCI is used.

Wherein, second sending submodule includes：

Transmission unit, for using with the transmission mode of the downlink shared data channel of the dispatching user facility it is identical or Different transmission mode sends the second level DCI to the user equipment in the downlink shared data channel.

First determining module, for detecting and determining that first order DCI, the first order DCI include：The lattice of second level DCI The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in formula information and a DCI to be transmitted；

Second determining module, for determining the transfer resource position of second level DCI and the polymerization grade of second level DCI；

Third determining module, for being received and described second on the transfer resource position of the determining second level DCI The corresponding second level DCI of polymerization grade of the format information and the second level DCI of grade DCI；Wherein, the second level DCI packet Contain：Other control information in the DCI to be transmitted other than the downlink resource distributes information.

Wherein, first determining module includes：

First determines submodule, carries out for the preceding preset quantity orthogonal frequency division multiplex OFDM symbol to each subframe blind Detection, determines first order DCI.

Second determining module includes：

Second determines submodule, for determine time-domain resource that the second level DCI is occupied initial position and it is described under The initial position of row shared data channel is identical.

Wherein, the first order DCI also includes：The polymerization grade of second level DCI；

Second determining module further includes：

Third determines submodule, and the polymerization grade of the second level DCI is determined for the instruction according to first order DCI.

Wherein, the first order DCI also includes：The location information of the transfer resource of second level DCI；The third determines mould Block includes：Third determines submodule, and the location information of the transfer resource of the second level DCI for including according to first order DCI is true Determine the transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The position for the frequency domain resource that the second level DCI is occupied and described the The persistence length for the time-domain resource that second level DCI is occupied；The third determining module includes：4th determines submodule, is used for basis The time-domain resource that the position for the frequency domain resource that the second level DCI that first order DCI includes is occupied and the second level DCI are occupied Persistence length determines the transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and institute State the modulation coding scheme of second level DCI use；The third determining module includes：5th determines submodule, for according to the The modulating-coding that the initial position for the frequency domain resource that the second level DCI that level-one DCI includes is occupied and the second level DCI are used Mode determines the transfer resource position of second level DCI.

Second determining module includes：

6th determines that submodule determines the second level DCI for the modulation coding scheme according to the data to be transmitted The modulation coding scheme of use and the polymerization grade of second level DCI；

7th determines submodule, the initial position of the frequency domain resource for occupying according to the second level DCI and described The modulation coding scheme that second level DCI is used determines the transfer resource position of second level DCI.

Wherein, the described 6th determine that submodule includes：

Grade acquiring unit, the target modulation grade M of the modulation coding scheme for obtaining data to be transmitted；

Code rate determination unit, the first code rate of the data to be transmitted under modulation coding scheme for determining M-N grade；N For integer predetermined；

Encode determination unit, if for the second level DCI under the modulation coding scheme of M-N grade the second code rate with it is described Difference between first code rate determines that modulation coding scheme corresponding with the M-N grade is described second less than a preset value The modulation coding scheme that grade DCI is used；

Level de-termination unit, the modulation coding scheme for being used according to the second level DCI, determines second level DCI's Polymerization grade.

Wherein, second determining module includes：

First signaling submodule, for receiving the first radio resource control RRC signaling；Wherein, it is carried in the first RRC signaling The location information of the transfer resource of the second level DCI；The transfer resource of second level DCI is determined according to first RRC signaling Position；

Alternatively, the second signaling submodule, for receiving the second radio resource control RRC signaling；Wherein, the second RRC signaling The time-domain resource that the middle position for carrying the frequency domain resource that the second level DCI is occupied and the second level DCI are occupied continues Length；The transfer resource position of second level DCI is determined according to second RRC signaling；

Alternatively, third signaling submodule, for receiving third radio resource control RRC signaling；Wherein, wherein the 3rd RRC The modulation that the initial position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in signaling use is compiled Code mode；The transfer resource position of second level DCI is determined according to the third RRC signaling.

Above-mentioned technical proposal of the invention at least has the advantages that：

In the transmission method and device of the Downlink Control Information DCI of the embodiment of the present invention, by down control channel to The Downlink Control Information of transmission, which is divided into two-stage, to be transmitted, and the bit number of first order DCI is fixed, then first order DCI's is blind It is less to examine number, the reliability of transmission is improved under identical control channel resource；It and include the second level in first order DCI The format information of DCI may thereby determine that the type of second level DCI, further increase the reliability of transmission；And second level DCI It is transmitted in the downlink shared data channel of user's scheduling, it can be with statistical multiplex downlink transfer resource, effective solution control The limited problem of channel capacity.

Detailed description of the invention

Fig. 1 shows one of step flow charts of transmission method of Downlink Control Information DCI provided in an embodiment of the present invention；

Fig. 2 indicates the two of the step flow chart of the transmission method of Downlink Control Information DCI provided in an embodiment of the present invention；

Fig. 3 indicates the signal that second level DCI is transmitted in the transmission method of Downlink Control Information DCI provided in an embodiment of the present invention Figure；

Fig. 4 indicates the schematic diagram of second level DCI transmission in the first case in specific embodiments of the present invention；

Fig. 5 indicates one of the schematic diagram of second level DCI transmission in the second case in specific embodiments of the present invention；

Fig. 6 indicates two of the schematic diagram of second level DCI transmission in the second case in specific embodiments of the present invention；

Fig. 7 indicates three of the schematic diagram of second level DCI transmission in the second case in specific embodiments of the present invention；

Fig. 8 shows one of the structural schematic diagrams of transmitting device of Downlink Control Information DCI provided in an embodiment of the present invention；

Fig. 9 indicates the second structural representation of the transmitting device of Downlink Control Information DCI provided in an embodiment of the present invention.

Specific embodiment

To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool Body embodiment is described in detail.

As shown in Figure 1, the embodiment of the present invention provides the transmission method of Downlink Control Information DCI a kind of, including：

Step 11, the DCI to be transmitted in down control channel is obtained；

Step 12, first order DCI is sent to user equipment, the first order DCI includes：The format information of second level DCI And the downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in the DCI to be transmitted；

Step 13, the second level DCI is sent to the user equipment, the second level DCI includes：It is described to be transmitted Other control information in DCI other than the downlink resource distributes information.

In the above embodiment of the present invention, it is grading that the Downlink Control Information to be transmitted in down control channel is divided into two Row transmission, as shown in figure 3, the schematic diagram of the DCI for two-stage transmission；Wherein, first order DCI has relatively-stationary information bit Number, and the information content that first order DCI is included at least is：The downlink resource distribution information of user and the lattice of second level DCI Formula information；The downlink resource distribution information of user is used to indicate the running time-frequency resource position of data to be transmitted.

It should be noted that there may be a variety of situations for the fixed number of bits of first order DCI, as existed under general mode A kind of bit number X, there are another bit number Y under compact mode, wherein Y<X.

Further, in the above embodiment of the present invention, step 12 includes：

First is sent to the user equipment on the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe Grade DCI.For example, first order DCI is transmitted in several OFDM symbols before each subframe, such as the 1st or 1~2 It is transmitted in OFDM symbol.Since first order DCI has fixed information bit number, user only needs the blind Detecting first order The position of DCI and polymerization grade information (first order DCI is transmitted through polymerization grade and realizes link circuit self-adapting process), then effectively The blind examination number and complexity for reducing user, improve the reliability of transmission.

Further, first order DCI described in the above embodiment of the present invention also includes：For matching for demodulated reference signal The modulation coding scheme of confidence breath and data to be transmitted；

It is decoded reception for the ease of reference signal and data of the user to transmission, network side need to be to subscriber terminal side Send the modulation coding scheme MCS of the configuration information and data to be transmitted for demodulated reference signal；In the embodiment of the present invention, The configuration information of above-mentioned demodulated reference signal and the modulation coding scheme MCS of data to be transmitted can be passed in first order DCI It is defeated, it can also transmit, be not specifically limited herein in the DCI of the second level.

Further, since second level DCI is there are multiple types, a plurality of types of DCI may have different transmission long Degree and different information fields, to support different transmission modes to configure；Then in order to avoid to second level DCI carry out blind examination, first The format information for the second level DCI for including in grade DCI is used to indicate the type of second level DCI, includes to determine in the DCI of the second level Information；The type that may thereby determine that second level DCI further increases the reliability of transmission.

And include in the DCI of the second level：Other controls in the DCI to be transmitted other than the downlink resource distributes information Information processed；For example, the process number of New Data Flag NDI, redundancy versions RV, hybrid automatic repeat-request HARQ, multiple-input, multiple-output Relevant information (MIMO related information), acyclic channel state information reference symbol (CSI-RS's) matches The feedback of confidence breath, channel quality instruction triggers (CQI feedback trigger), and detection reference signal feeds back (SRS Trigger), the information such as power contorl parameters (power control)；But be not limited to above- mentioned information, according to specific NR (5G's Wireless access network) design can add relevant information, be not specifically limited herein.

Further, first order DCI described in the above embodiment of the present invention also includes：It is used to indicate the user equipment The instruction information of the downlink shared data channel of scheduling；Then step 13 includes：

Step 131, to described in user equipment transmission in the downlink shared data channel of the dispatching user facility Second level DCI；Wherein, the initial position for the time-domain resource that the second level DCI is occupied and the downlink shared data channel Initial position is identical.

To sum up, second level DCI is located at biography in the downlink shared data channel (PDSCH) of user's scheduling in the embodiment of the present invention It is defeated, it can be with statistical multiplex downlink transfer resource, the limited problem of effective solution control channel capacity；And it is located at user's scheduling The second level DCI of PDSCH channel, which can be used wave beam forming identical with data channel and be multiplexed the pilot tone of PDSCH channel, to be matched It sets, the reliability of control channel transmission and the efficiency of transmission of data can be improved.

Further, in the above embodiment of the present invention, second level DCI can be without blind Detecting；Then first order DCI is also wrapped Contain：The polymerization grade of second level DCI.And the transfer resource position of second level DCI can be indicated by first order DCI；It can also be with It is indicated by RRC signaling；The i.e. described first order DCI also includes：The location information of the transfer resource of second level DCI；Alternatively, The method also includes：The first radio resource control RRC signaling is sent to the user equipment；Wherein, it is taken in the first RRC signaling The location information of transfer resource with the second level DCI.

Further, the transfer resource position of second level DCI can by indicate second level DCI frequency domain position and The lasting length of time domain carrys out dominant instruction；The i.e. described first order DCI also includes：The frequency domain resource that the second level DCI is occupied The persistence length for the time-domain resource that position and the second level DCI are occupied；Alternatively, the method also includes：To the user Equipment sends the second radio resource control RRC signaling；Wherein, the frequency domain that the second level DCI is occupied is carried in the second RRC signaling The persistence length for the time-domain resource that the position of resource and the second level DCI are occupied.

Wherein, the frequency domain position of second level DCI can be preset relative to its PDSCH channel, such as occupied bandwidth Or its starting frequency domain position consistent with PDSCH is consistent with PDSCH；The frequency domain position of second level DCI is also possible to by the first order DCI indicate or be semi-statically configured by RRC signaling.

Further, the transfer resource position of second level DCI can also by the frequency domain initial position of second level DCI and The MCS mode that DCI transmission in the second level uses carrys out recessive instruction；It should be noted that when not including number to be transmitted in first order DCI According to modulation coding scheme MCS when, the tune that the second level DCI is used can be directly indicated in first order DCI or RRC signaling Coding mode MCS processed；The i.e. described first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and The modulation coding scheme MCS that the second level DCI is used；Alternatively, the method also includes：Third is sent to the user equipment Radio resource control RRC signaling；Wherein, the start bit for the frequency domain resource that the second level DCI is occupied is carried in third RRC signaling Set and the second level DCI use modulation coding scheme.For example, second level DCI is using fixed QPSK modulation transmissions.

Further it should be noted that when in first order DCI including the modulation coding scheme MCS of data to be transmitted, The transfer resource position of second level DCI can again the first order DCI include the second level DCI occupy frequency domain resource rise Beginning position and data to be transmitted modulation coding scheme, come recessive instruction.

The MCS or poly- that user uses according to the transmission of the determination second level DCI of the MCS information recessiveness in the DCI of the first order Close grade；For example, DCI transmission in the second level uses the selection criterion of MCS or polymerization grade can be for：So that being passed in second level DCI After the MCS of the data transmission indicated in the MCS of defeated use or code rate under polymerization grade and first order DCI falls back n grade MCS is consistent as far as possible；Wherein n is integer predetermined.

Further, in the above embodiment of the present invention, step 131 includes：

Using identical or different as the transmission mode of downlink shared data channel PDSCH of the dispatching user facility Transmission mode sends the second level DCI to the user equipment in the downlink shared data channel.That is second level DCI's Transmission mode can be as PDSCH or different, carries out transmitting or using transmission diversity by the way of wave beam forming, such as Space-frequency block codes SFBC is transmitted.

To sum up, in the transmission method for the Downlink Control Information DCI that the above embodiment of the present invention provides, downlink is controlled and is believed Downlink Control Information to be transmitted in road, which is divided into two-stage, to be transmitted, and the bit number of first order DCI is fixed, then the first order The blind examination number of DCI is less, and the reliability of transmission is improved under identical control channel resource；And it is wrapped in first order DCI The format information of the DCI containing the second level, may thereby determine that the type of second level DCI, further increase the reliability of transmission；And the Second level DCI, which is located in the downlink shared data channel of user's scheduling, to be transmitted, can be effective to solve with statistical multiplex downlink transfer resource The certainly limited problem of control channel capacity.

As shown in Fig. 2, the embodiment of the present invention also provides the transmission method of Downlink Control Information DCI a kind of, including：

Step 21, it detects and determines that first order DCI, the first order DCI include：The format information of second level DCI and The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in one DCI to be transmitted；

Step 22, the transfer resource position of second level DCI and the polymerization grade of second level DCI are determined；

Step 23, the format with the second level DCI is received on the transfer resource position of the determining second level DCI The corresponding second level DCI of the polymerization grade of information and the second level DCI；Wherein, the second level DCI includes：It is described to be passed Other control information in defeated DCI other than the downlink resource distributes information.

In the above embodiment of the present invention, it is grading that the Downlink Control Information to be transmitted in down control channel is divided into two Row transmission；Then user divides two-stage to receive Downlink Control Information.Wherein, first order DCI has relatively-stationary information bit number, And the information content that first order DCI is included at least is：The downlink resource distribution information of user and the format letter of second level DCI Breath；The downlink resource distribution information of user is used to indicate the running time-frequency resource position of data to be transmitted.

Further, in the above embodiment of the present invention, step 21 includes：

Blind Detecting is carried out to the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe, determines first order DCI. For example, first order DCI is transmitted in several OFDM symbols before each subframe, such as the 1st or 1~2 OFDM symbol On transmitted.Since first order DCI has fixed information bit number, user only needs the position of blind Detecting first order DCI It sets and polymerization grade information (first order DCI be transmitted through polymerization grade realize link circuit self-adapting process), is then effectively reduced The blind examination number and complexity of user, improves the reliability of transmission.After user detects acquisition first order DCI, it can open immediately The processing begun to the bit field for receiving data, such as frame decoding solve OFDM, and the operation such as channel estimation is not specifically limited herein.

Further, first order DCI described in the above embodiment of the present invention also includes：For matching for demodulated reference signal The modulation coding scheme of confidence breath and data to be transmitted；Alternatively, the first order DCI also includes for demodulated reference signal Configuration information, and the second level DCI also includes the modulation coding scheme of data to be transmitted；Alternatively, the first order DCI is also wrapped Modulation coding scheme containing data to be transmitted, and the second level DCI also includes the configuration information for demodulated reference signal.

Further, first order DCI described in the above embodiment of the present invention also includes：It is used to indicate the user equipment The instruction information of the downlink shared data channel of scheduling；Then step 22 includes：

Further, in the above embodiment of the present invention, second level DCI can be without blind Detecting, and the biography of second level DCI Defeated resource location can be indicated by first order DCI；It can also be indicated that the i.e. described first order DCI is also wrapped by RRC signaling Contain：The polymerization grade of second level DCI；Then step 22 further includes：Determine the second level DCI's according to the instruction of first order DCI Polymerization grade.

Further, first order DCI described in the above embodiment of the present invention also includes：The transfer resource of second level DCI Location information；Then step 22 further includes：Location information according to the transfer resource of the first order DCI second level DCI for including is true Determine the transfer resource position of second level DCI；Alternatively, the embodiment of the invention also includes：Receive the first radio resource control RRC letter It enables；Wherein, the location information of the transfer resource of the second level DCI is carried in the first RRC signaling；Believed according to the first RRC Enable the transfer resource position for determining second level DCI.

Further, the first order DCI also includes：The position for the frequency domain resource that the second level DCI is occupied and The persistence length for the time-domain resource that the second level DCI is occupied；Then step 22 further includes：Include according to first order DCI second The persistence length for the time-domain resource that the position for the frequency domain resource that grade DCI is occupied and the second level DCI are occupied determines the second level The transfer resource position of DCI；Alternatively, the embodiment of the invention also includes：Receive the second radio resource control RRC signaling；Wherein, The time domain money that the position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in two RRC signalings occupy The persistence length in source；The transfer resource position of second level DCI is determined according to second RRC signaling.

Further, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied And the modulation coding scheme that the second level DCI is used；Then step 22 further includes：The second level for including according to first order DCI The modulation coding scheme that the initial position for the frequency domain resource that DCI is occupied and the second level DCI are used determines second level DCI's Transfer resource position.Alternatively, the embodiment of the invention also includes：Receive third radio resource control RRC signaling；Wherein, wherein the The tune that the initial position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in three RRC signalings use Coding mode processed；The transfer resource position of second level DCI is determined according to the third RRC signaling.

Further, first order DCI described in the above embodiment of the present invention also includes：What the second level DCI was occupied The initial position of frequency domain resource and the modulation coding scheme of data to be transmitted；Then step 22 includes：

According to the modulation coding scheme of the data to be transmitted, the modulation coding scheme that the second level DCI is used is determined With the polymerization grade of second level DCI；According to the initial position and described second of the second level DCI frequency domain resource occupied The modulation coding scheme that grade DCI is used determines the transfer resource position of second level DCI.

Further, the modulation coding scheme according to the data to be transmitted determines what the second level DCI was used The step of polymerization grade of modulation coding scheme and second level DCI, including：

Obtain the target modulation grade M of the modulation coding scheme of data to be transmitted；Determine the modulation coding scheme of M-N grade Under data to be transmitted the first code rate；N is integer predetermined；If the second level under the modulation coding scheme of M-N grade Difference between the second code rate of DCI and first code rate determines modulation corresponding with the M-N grade less than a preset value Coding mode is the modulation coding scheme that the second level DCI is used；The modulating-coding side used according to the second level DCI Formula determines the polymerization grade of second level DCI.

When in first order DCI including the modulation coding scheme MCS of data to be transmitted, the transfer resource position of second level DCI Set can again the first order DCI include the second level DCI occupy frequency domain resource initial position and data to be transmitted Modulation coding scheme, come recessive instruction.User is according to the determination second level DCI's of the MCS information recessiveness in the DCI of the first order Transmit the MCS or polymerization grade used；For example, DCI transmission in the second level uses the selection criterion of MCS or polymerization grade can be for： So that the data transmission indicated in the code rate and first order DCI under the MCS or polymerization grade that DCI transmission in the second level uses MCS after MCS n grade of retroversion is consistent as far as possible；Wherein n is integer predetermined.

To sum up, in the transmission method for the Downlink Control Information DCI that the above embodiment of the present invention provides, down control channel In Downlink Control Information to be transmitted be divided into two-stage and transmitted, and the bit number of first order DCI is fixed, then the first order The blind examination number of DCI is less, and the reliability of transmission is improved under identical control channel resource；And it is wrapped in first order DCI The format information of the DCI containing the second level, may thereby determine that the type of second level DCI, further increase the reliability of transmission.Citing It is described as follows：

First case

As shown in table 1, the embodiment of 2 grades of DCI division of teaching contents is given.

Table 1

Specifically, being illustrated in figure 4 the schematic diagram of second level DCI；Resource allocation information in first order DCI include time domain and The resource allocation information of frequency domain；And the format information for being used to refer to the second level in first order DCI, it can be referred to N number of bit Show the different second level DCI format of 2N kind；As the format 1,01 in above-mentioned example in 00 instruction second level DCI indicates the second level Format 2,10 in DCI indicates the format 3 in the DCI of the second level.The running time-frequency resource initial position of second level DCI is defaulted as PDSCH The specific running time-frequency resource of initial position, occupancy is indicated by time domain symbolic number.

Second case

As shown in table 2, the embodiment of 2 grades of DCI division of teaching contents is given.

Table 2

Specifically, as Fig. 5, Fig. 6 and Fig. 7 show the schematic diagram of second level DCI；Wherein, second level DCI in Fig. 5 and Fig. 6 Running time-frequency resource initial position is defaulted as the initial position PDSCH；And the running time-frequency resource initial position of second level DCI is believed by RRC in Fig. 7 Order is semi-statically configured, and configuration guidelines are the preferable subband of channel quality in base station selected PDSCH resource as second level DCI Frequency-domain transmission unit.

Wherein, the resource allocation information in first order DCI includes the resource allocation information of time domain and frequency domain；First order DCI In the format information for being used to refer to the second level, the different second level DCI format of 2N kind can be indicated with N number of bit；As above It states the format 1,01 in example in 00 instruction second level DCI and indicates that the format 2,10 in the DCI of the second level indicates in the DCI of the second level Format 3.The polymerization grade for the second level DCI that the specific running time-frequency resource of the occupancy of second level DCI is indicated according to the first order determines.

The symbol mapping of second level DCI can be mapped according to the mode of first frequency domain time domain again, can also be according to first time domain The mode of frequency domain is mapped again.The running time-frequency resource start bit of second level DCI can set be defaulted as the initial position PDSCH can also be with It is semi-statically configured by RRC signaling.

Third example

As shown in table 3, the embodiment of 2 grades of DCI division of teaching contents is given.

Table 3

Specifically, the resource allocation information in first order DCI includes the resource allocation information of time domain and frequency domain；The first order The format information for being used to refer to the second level in DCI can indicate the different second level DCI format of 2N kind with N number of bit；Such as Format 1,01 in above-mentioned example in 00 instruction second level DCI indicates that the format 2,10 in the DCI of the second level indicates in the DCI of the second level Format 3.The specific running time-frequency resource of the occupancy of second level DCI is determined according to the MCS information recessiveness in first order DCI.

The selection criterion for determining second level DCI polymerization grade is：So that MCS or polymerization in second level DCI transmission use MCS after the MCS n grade of retroversion of the data transmission indicated in code rate and first order DCI under grade is consistent as far as possible；Wherein n For integer predetermined.The symbol mapping of second level DCI is mapped according to the mode of first frequency domain time domain again.Second level DCI Running time-frequency resource start bit can set and be defaulted as the initial position PDSCH or be semi-statically configured by RRC signaling.

4th

As shown in table 4, the embodiment of 2 grades of DCI division of teaching contents is given.(first order DCI does not include data to be transmitted MCS)

Table 4

Specifically, the resource allocation information in first order DCI includes the resource allocation information of time domain and frequency domain；The first order The format information for being used to refer to second level DCI in DCI can indicate the different second level DCI lattice of 2N kind with N number of bit Formula；As the format 1,01 in above-mentioned example in 00 instruction second level DCI indicates that the format 2,10 in the DCI of the second level indicates the second level Format 3 in DCI.The running time-frequency resource initial position of second level DCI is defaulted as the initial position PDSCH, the specific time-frequency money of occupancy Source is indicated by time domain symbolic number.

5th

As shown in table 5, the embodiment of 2 grades of DCI division of teaching contents is given.(first order DCI does not include data to be transmitted MCS and user's demodulated reference signal configuration information)

Table 5

Specifically, the resource allocation information in first order DCI includes the resource allocation information of time domain and frequency domain；The first order The format information for being used to refer to the second level in DCI can indicate the different second level DCI format of 2N kind with N number of bit；Such as Format 1,01 in above-mentioned example in 00 instruction second level DCI indicates that the format 2,10 in the DCI of the second level indicates in the DCI of the second level Format 3.

The running time-frequency resource initial position of second level DCI is defaulted as the initial position PDSCH, and the specific running time-frequency resource of occupancy passes through Time domain symbolic number is indicated.

6th

As shown in table 6, the embodiment of 2 grades of DCI division of teaching contents is given.

Table 6

Specifically, the resource allocation information in first order DCI includes the resource allocation information of time domain and frequency domain；The first order The format information for being used to refer to the second level in DCI can indicate the different second level DCI format of 2N kind with N number of bit；Such as Format 1,01 in above-mentioned example in 00 instruction second level DCI indicates that the format 2,10 in the DCI of the second level indicates in the DCI of the second level Format 3.The polymerization grade for the second level DCI that the specific running time-frequency resource of the occupancy of second level DCI is indicated according to the first order determines. The symbol mapping of second level DCI can be mapped according to the mode of first frequency domain time domain again, can also be according to first time domain frequency domain again Mode is mapped.The running time-frequency resource start bit of second level DCI, which can be set, to be defaulted as the initial position PDSCH or is believed by RRC Order is semi-statically configured.

As shown in figure 8, the embodiment of the present invention also provides the transmitting device of Downlink Control Information DCI a kind of, including：

Module 31 is obtained, for obtaining the DCI to be transmitted in down control channel；

First sending module 32, for sending first order DCI to user equipment, the first order DCI includes：The second level The downlink resource point of the running time-frequency resource position of data to be transmitted is used to indicate in the format information of DCI and the DCI to be transmitted With information；

Second sending module 33, for sending the second level DCI to the user equipment, the second level DCI includes： Other control information in the DCI to be transmitted other than the downlink resource distributes information.

Specifically, first order DCI described in the above embodiment of the present invention also includes：

Specifically, the first sending module described in the above embodiment of the present invention includes：

Specifically, first order DCI described in the above embodiment of the present invention also includes：It is used to indicate the user equipment tune The instruction information of the downlink shared data channel of degree；

Second sending module includes：

Specifically, first order DCI described in the above embodiment of the present invention also includes：The polymerization grade of second level DCI.

Specifically, first order DCI described in the above embodiment of the present invention also includes：The transfer resource of second level DCI Location information；

Specifically, first order DCI described in the above embodiment of the present invention also includes：The frequency that the second level DCI is occupied The persistence length for the time-domain resource that the position of domain resource and the second level DCI are occupied；

Specifically, first order DCI described in the above embodiment of the present invention also includes：The frequency that the second level DCI is occupied The modulation coding scheme that the initial position of domain resource and the second level DCI are used；

Specifically, first order DCI described in the above embodiment of the present invention also includes：The frequency that the second level DCI is occupied The initial position of domain resource and the modulation coding scheme of data to be transmitted.

Specifically, the second sending submodule described in the above embodiment of the present invention includes：

To sum up, in the transmitting device for the Downlink Control Information DCI that the above embodiment of the present invention provides, down control channel In Downlink Control Information to be transmitted be divided into two-stage and transmitted, and the bit number of first order DCI is fixed, then the first order The blind examination number of DCI is less, and the reliability of transmission is improved under identical control channel resource；And it is wrapped in first order DCI The format information of the DCI containing the second level, may thereby determine that the type of second level DCI, further increase the reliability of transmission；And the Second level DCI, which is located in the downlink shared data channel of user's scheduling, to be transmitted, can be effective to solve with statistical multiplex downlink transfer resource The certainly limited problem of control channel capacity.

It should be noted that the transmitting device of Downlink Control Information DCI provided in an embodiment of the present invention is to be able to carry out The transmitting device of the transmission method of Downlink Control Information DCI is stated, then all realities of the transmission method of above-mentioned Downlink Control Information DCI The transmitting device that example is suitable for Downlink Control Information DCI is applied, and can reach the same or similar beneficial effect.

As shown in figure 9, the embodiment of the present invention also provides the transmitting device of Downlink Control Information DCI a kind of, including：

First determining module 41, for detecting and determining that first order DCI, the first order DCI include：Second level DCI's The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in format information and a DCI to be transmitted；

Second determining module 42, for determining the transfer resource position of second level DCI and the polymerization grade of second level DCI；

Third determining module 43, for being received on the transfer resource position of the determining second level DCI and described the The corresponding second level DCI of the polymerization grade of the format information of second level DCI and the second level DCI；Wherein, the second level DCI Include：Other control information in the DCI to be transmitted other than the downlink resource distributes information.

Specifically, first order DCI described in the above embodiment of the present invention also includes：Configuration for demodulated reference signal The modulation coding scheme of information and data to be transmitted；

Specifically, the first determining module described in the above embodiment of the present invention includes：

Second determining module includes：

Specifically, first order DCI described in the above embodiment of the present invention also includes：The polymerization grade of second level DCI；

Second determining module further includes：

Specifically, first order DCI described in the above embodiment of the present invention also includes：The transfer resource of second level DCI Location information；The third determining module includes：Third determines submodule, the second level DCI for including according to first order DCI The location information of transfer resource determine the transfer resource position of second level DCI；

Specifically, first order DCI described in the above embodiment of the present invention also includes：The frequency that the second level DCI is occupied The initial position of domain resource and the modulation coding scheme of data to be transmitted；

Second determining module includes：

Specifically, the 6th determining submodule described in the above embodiment of the present invention includes：

Specifically, the second determining module described in the above embodiment of the present invention includes：

The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims

1. a kind of transmission method of Downlink Control Information DCI, which is characterized in that including：

Obtain the DCI to be transmitted in down control channel；

First order DCI is sent to user equipment, the first order DCI includes：The format information of second level DCI and described to be passed The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in defeated DCI；

The second level DCI is sent to the user equipment, the second level DCI includes：In addition to described in the DCI to be transmitted Downlink resource distributes other control information except information.

2. the method according to claim 1, wherein the first order DCI also includes：

Alternatively, the first order DCI also includes the configuration information for demodulated reference signal, and the second level DCI also includes The modulation coding scheme of data to be transmitted；

Alternatively, the first order DCI also includes the modulation coding scheme of data to be transmitted, and the second level DCI also includes use In the configuration information of demodulated reference signal.

3. the method according to claim 1, wherein described the step of sending first order DCI to user equipment, packet It includes：

The first order is sent to the user equipment on the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe DCI。

4. the method according to claim 1, wherein the first order DCI also includes：It is used to indicate the user The instruction information of the downlink shared data channel of equipment scheduling；

The second level DCI is sent to the user equipment in the downlink shared data channel of the dispatching user facility；Its In, the initial position for the time-domain resource that the second level DCI is occupied is identical as the initial position of the downlink shared data channel.

5. the method according to claim 1, wherein the first order DCI also includes：The polymerization of second level DCI Grade.

6. method according to claim 4 or 5, which is characterized in that the first order DCI also includes：The biography of second level DCI The location information of defeated resource；

Alternatively, the method also includes：The first radio resource control RRC signaling is sent to the user equipment；Wherein, first The location information of the transfer resource of the second level DCI is carried in RRC signaling.

7. method according to claim 4 or 5, which is characterized in that the first order DCI also includes：The second level DCI The persistence length for the time-domain resource that the position of the frequency domain resource of occupancy and the second level DCI are occupied；

Alternatively, the method also includes：The second radio resource control RRC signaling is sent to the user equipment；Wherein, second The time-domain resource that the position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in RRC signaling occupy Persistence length.

8. method according to claim 4 or 5, which is characterized in that the first order DCI also includes：The second level DCI The modulation coding scheme that the initial position of the frequency domain resource of occupancy and the second level DCI are used；

Alternatively, the method also includes：Third radio resource control RRC signaling is sent to the user equipment；Wherein, third The modulation that the initial position and the second level DCI that the frequency domain resource that the second level DCI is occupied is carried in RRC signaling use Coding mode.

9. method according to claim 1 or 5, which is characterized in that the first order DCI also includes：The second level DCI The initial position of the frequency domain resource of occupancy and the modulation coding scheme of data to be transmitted.

10. according to the method described in claim 4, it is characterized in that, the shared number of the downlink in the dispatching user facility It is believed that the step of sending the second level DCI to the user equipment in road, including：

Using transmission mode identical or different with the transmission mode of the downlink shared data channel of the dispatching user facility The second level DCI is sent to the user equipment in the downlink shared data channel.

11. a kind of transmission method of Downlink Control Information DCI, which is characterized in that including：

Detect and determine that first order DCI, the first order DCI include：The format information of second level DCI and a DCI to be transmitted In be used to indicate data to be transmitted running time-frequency resource position downlink resource distribution information；

It is received on the transfer resource position of the determining second level DCI and the format information of the second level DCI and described The corresponding second level DCI of the polymerization grade of second level DCI；Wherein, the second level DCI includes：In the DCI to be transmitted in addition to Other control information except the downlink resource distribution information.

12. according to the method for claim 11, which is characterized in that the first order DCI also includes：Believe for demodulation reference Number configuration information and data to be transmitted modulation coding scheme；

13. according to the method for claim 11, which is characterized in that described the step of detecting and determining first order DCI, packet It includes：

14. according to the method for claim 11, which is characterized in that the first order DCI also includes：User is used to indicate to set The instruction information of the downlink shared data channel of standby scheduling；

Determine the initial position for the time-domain resource that the second level DCI is occupied and the initial position of the downlink shared data channel It is identical.

15. according to the method for claim 11, which is characterized in that the first order DCI also includes：Second level DCI's is poly- Close grade；The step of polymerization grade of the determining second level DCI, including：Described second is determined according to the instruction of first order DCI The polymerization grade of grade DCI.

16. method according to claim 14 or 15, which is characterized in that

The first order DCI also includes：The location information of the transfer resource of second level DCI；The transmission of the determining second level DCI The step of resource location further includes：The location information of the transfer resource for the second level DCI for including according to first order DCI determines The transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The position and the second level for the frequency domain resource that the second level DCI is occupied The persistence length for the time-domain resource that DCI is occupied；The step of transfer resource position of the determining second level DCI, further include：According to The time-domain resource that the position for the frequency domain resource that the second level DCI that first order DCI includes is occupied and the second level DCI are occupied Persistence length determines the transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and described the The modulation coding scheme that second level DCI is used；The step of transfer resource position of the determining second level DCI, further include：According to The modulating-coding that the initial position for the frequency domain resource that the second level DCI that level-one DCI includes is occupied and the second level DCI are used Mode determines the transfer resource position of second level DCI.

17. method described in 1 or 14 according to claim 1, which is characterized in that the first order DCI also includes：The second level The initial position for the frequency domain resource that DCI is occupied and the modulation coding scheme of data to be transmitted；

According to the modulation coding scheme of the data to be transmitted, modulation coding scheme that the second level DCI is used and the are determined The polymerization grade of second level DCI；

The modulating-coding used according to the initial position of the second level DCI frequency domain resource occupied and the second level DCI Mode determines the transfer resource position of second level DCI.

18. according to the method for claim 17, which is characterized in that the modulating-coding side according to the data to be transmitted Formula, the step of determining the polymerization grade for the modulation coding scheme and second level DCI that the second level DCI is used, including：

If the difference between the second code rate of the second level DCI under the modulation coding scheme of M-N grade and first code rate is small In a preset value, determine that modulation coding scheme corresponding with the M-N grade is the modulating-coding side that the second level DCI is used Formula；

19. method according to claim 14 or 15, which is characterized in that the transfer resource position of the determining second level DCI The step of setting, including：

Receive the first radio resource control RRC signaling；Wherein, the transfer resource of the second level DCI is carried in the first RRC signaling Location information；The transfer resource position of second level DCI is determined according to first RRC signaling；

Alternatively, receiving the second radio resource control RRC signaling；Wherein, the second level DCI is carried in the second RRC signaling to occupy Frequency domain resource position and the second level DCI occupy time-domain resource persistence length；According to second RRC signaling Determine the transfer resource position of second level DCI；

Alternatively, receiving third radio resource control RRC signaling；Wherein, wherein the second level DCI is carried in third RRC signaling The modulation coding scheme that the initial position of the frequency domain resource of occupancy and the second level DCI are used；Believed according to the 3rd RRC Enable the transfer resource position for determining second level DCI.

20. a kind of transmitting device of Downlink Control Information DCI, which is characterized in that including：

First sending module, for sending first order DCI to user equipment, the first order DCI includes：The lattice of second level DCI The downlink resource distribution information of the running time-frequency resource position of data to be transmitted is used to indicate in formula information and the DCI to be transmitted；

Second sending module, for sending the second level DCI to the user equipment, the second level DCI includes：It is described to Transmit other control information in DCI other than the downlink resource distributes information.

21. device according to claim 20, which is characterized in that the first order DCI also includes：

22. device according to claim 20, which is characterized in that first sending module includes：

First sending submodule, on the preceding preset quantity orthogonal frequency division multiplex OFDM symbol of each subframe to the use Family equipment sends first order DCI.

23. device according to claim 20, which is characterized in that the first order DCI also includes：It is used to indicate the use The instruction information of the downlink shared data channel of family equipment scheduling；

Second sending module includes：

Second sending submodule, for being sent out in the downlink shared data channel of the dispatching user facility to the user equipment Send the second level DCI；Wherein, the initial position for the time-domain resource that the second level DCI is occupied and the downlink shared data The initial position of channel is identical.

24. device according to claim 20, which is characterized in that the first order DCI also includes：Second level DCI's is poly- Close grade.

25. the device according to claim 23 or 24, which is characterized in that the first order DCI also includes：Second level DCI Transfer resource location information；

Alternatively, described device further includes：First signaling sending module, for sending the first radio resource control to the user equipment RRC signaling processed；Wherein, the location information of the transfer resource of the second level DCI is carried in the first RRC signaling.

26. the device according to claim 23 or 24, which is characterized in that the first order DCI also includes：The second level The persistence length for the time-domain resource that the position for the frequency domain resource that DCI is occupied and the second level DCI are occupied；

Alternatively, described device further includes：Second signaling sending module, for sending the second radio resource control to the user equipment RRC signaling processed；Wherein, the position and described second for the frequency domain resource that the second level DCI is occupied is carried in the second RRC signaling The persistence length for the time-domain resource that grade DCI is occupied.

27. the device according to claim 23 or 24, which is characterized in that the first order DCI also includes：The second level The modulation coding scheme that the initial position for the frequency domain resource that DCI is occupied and the second level DCI are used；

Alternatively, described device further includes：Third signaling sending module, for sending the control of third radio resource to the user equipment RRC signaling processed；Wherein, the initial position of the frequency domain resource that the second level DCI is occupied and described is carried in third RRC signaling The modulation coding scheme that second level DCI is used.

28. the device according to claim 20 or 24, which is characterized in that the first order DCI also includes：The second level The initial position for the frequency domain resource that DCI is occupied and the modulation coding scheme of data to be transmitted.

29. device according to claim 23, which is characterized in that second sending submodule includes：

Transmission unit, for using or not phase identical as the transmission mode of the downlink shared data channel of the dispatching user facility Same transmission mode sends the second level DCI to the user equipment in the downlink shared data channel.

30. a kind of transmitting device of Downlink Control Information DCI, which is characterized in that including：

First determining module, for detecting and determining that first order DCI, the first order DCI include：The format of second level DCI is believed Breath and a DCI to be transmitted in be used to indicate data to be transmitted running time-frequency resource position downlink resource distribution information；

Third determining module, for being received and the second level DCI on the transfer resource position of the determining second level DCI Format information and the second level DCI the corresponding second level DCI of polymerization grade；Wherein, the second level DCI includes：Institute State other control information in DCI to be transmitted other than the downlink resource distributes information.

31. device according to claim 30, which is characterized in that the first order DCI also includes：Believe for demodulation reference Number configuration information and data to be transmitted modulation coding scheme；

32. device according to claim 30, which is characterized in that first determining module includes：

First determines submodule, carries out blind examination for the preceding preset quantity orthogonal frequency division multiplex OFDM symbol to each subframe It surveys, determines first order DCI.

33. device according to claim 30, which is characterized in that the first order DCI also includes：User is used to indicate to set The instruction information of the downlink shared data channel of standby scheduling；

Second determining module includes：

Second determines submodule, and the initial position and the downlink for determining the time-domain resource of the second level DCI occupancy are total The initial position for enjoying data channel is identical.

34. device according to claim 30, which is characterized in that the first order DCI also includes：Second level DCI's is poly- Close grade；

Second determining module further includes：

35. the device according to claim 33 or 34, which is characterized in that

The first order DCI also includes：The location information of the transfer resource of second level DCI；The third determining module includes：The Three determine that submodule, the location information of the transfer resource of the second level DCI for including according to first order DCI determine the second level The transfer resource position of DCI；

Alternatively, the first order DCI also includes：The position and the second level for the frequency domain resource that the second level DCI is occupied The persistence length for the time-domain resource that DCI is occupied；The third determining module includes：4th determines submodule, for according to first The time-domain resource that the position for the frequency domain resource that the second level DCI that grade DCI includes is occupied and the second level DCI are occupied continues Length determines the transfer resource position of second level DCI；

Alternatively, the first order DCI also includes：The initial position for the frequency domain resource that the second level DCI is occupied and described the The modulation coding scheme that second level DCI is used；The third determining module includes：5th determines submodule, for according to the first order The modulation coding scheme that the initial position for the frequency domain resource that the second level DCI that DCI includes is occupied and the second level DCI are used Determine the transfer resource position of second level DCI.

36. the device according to claim 30 or 33, which is characterized in that the first order DCI also includes：The second level The initial position for the frequency domain resource that DCI is occupied and the modulation coding scheme of data to be transmitted；

Second determining module includes：

6th determines submodule, for the modulation coding scheme according to the data to be transmitted, determines that the second level DCI is used Modulation coding scheme and second level DCI polymerization grade；

7th determines submodule, the initial position and described second of the frequency domain resource for occupying according to the second level DCI The modulation coding scheme that grade DCI is used determines the transfer resource position of second level DCI.

37. device according to claim 36, which is characterized in that the described 6th determines that submodule includes：

Code rate determination unit, the first code rate of the data to be transmitted under modulation coding scheme for determining M-N grade；N is pre- The integer first defined；

Determination unit is encoded, if the second code rate and described first for the second level DCI under the modulation coding scheme of M-N grade Difference between code rate determines that modulation coding scheme corresponding with the M-N grade is the second level DCI less than a preset value The modulation coding scheme of use；

Level de-termination unit, the modulation coding scheme for being used according to the second level DCI, determines the polymerization of second level DCI Grade.

38. the device according to claim 33 or 34, which is characterized in that second determining module includes：

First signaling submodule, for receiving the first radio resource control RRC signaling；Wherein, described in being carried in the first RRC signaling The location information of the transfer resource of second level DCI；The transfer resource position of second level DCI is determined according to first RRC signaling；

Alternatively, the second signaling submodule, for receiving the second radio resource control RRC signaling；Wherein, it is taken in the second RRC signaling The persistence length for the time-domain resource that position and the second level DCI with the second level DCI frequency domain resource occupied occupy； The transfer resource position of second level DCI is determined according to second RRC signaling；

Alternatively, third signaling submodule, for receiving third radio resource control RRC signaling；Wherein, wherein third RRC signaling The modulating-coding side that the middle initial position for carrying the frequency domain resource that the second level DCI is occupied and the second level DCI are used Formula；The transfer resource position of second level DCI is determined according to the third RRC signaling.