CN107371272A

CN107371272A - Transmission method, the apparatus and system of Downlink Control Information

Info

Publication number: CN107371272A
Application number: CN201610666794.4A
Authority: CN
Inventors: 石靖; 夏树强; 左志松; 张雯; 韩祥辉; 任敏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-13
Filing date: 2016-08-12
Publication date: 2017-11-21
Anticipated expiration: 2036-08-12
Also published as: CN107371272B

Abstract

The invention provides a kind of transmission method of Downlink Control Information, apparatus and system, wherein, this method includes：The DCI of the UE for dispatching sTTI is carried by least one of Legacy PDCCH, EPDCCH, SPDCCH；The DCI of carrying is sent to terminal；Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：Traffic Channel in only sTTI；The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.Pass through the present invention, solve the problems, such as to lack the Downlink Control Information for supporting short TTI and its related service scheduling in correlation technique in low time delay communication scenes, the implementation for supporting short TTI scheduling and its related different length TTI traffic scheduling is given, ensures time delay communication requirement.

Description

Transmission method, the apparatus and system of Downlink Control Information

Technical field

The present invention relates to the communications field, in particular to a kind of transmission method of Downlink Control Information, device and is System.

Background technology

With fourth generation mobile communication technology (4G, the 4th Generation mobile communication Technology) Long Term Evolution (LTE, Long-Term Evolution)/senior long term evolution (LTE-Advance/LTE-A, Long-Term Evolution Advance) commercial increasingly perfect of system is to move in the 5th generation to next generation mobile communication technology The technical indicator of the dynamic communication technology (5G, the 5th Generation mobile communication technology) will Seek also more and more higher.In the industry it is believed that next generation mobile communication system should have superelevation speed, ultra-high capacity, superelevation reliable The feature such as property and ultralow delay transport characteristic.For the index of ultralow time delay in 5G systems it is generally acknowledged at present for time delay of eating dishes without rice or wine The about 1ms order of magnitude.

It is a kind of effectively realize ultralow time delay method be by reduce the transmission time interval of LTE system (TTI, Transmission Time Interval), fully shorten processing delay unit, to support above-mentioned 1ms to eat dishes without rice or wine the characteristic of time delay Demand.The method that presently, there are two kinds of diminution TTI, one kind is by expanding OFDM (OFDM, Orthogonal Frequency Division Multiplexing) subcarrier spacing of system reduces the duration of single OFDM symbol, the party Method relates in 5G high frequency communication system and super-intensive network；Another method be current 3GPP discussed by subtracting The quantity of OFDM symbol reduces TTI length in few single TTI, and the benefit of this method is can be complete with current LTE system It is compatible.Illustrated herein mainly for later approach.

At present in LTE system Downlink Control Information (DCI, Downlink Control Information) by occupancy system Down control channel (PDCCH, Physical the Downlink Control of the resource area of preceding 0-4 OFDM symbol in bandwidth Channel) carry, or by using downstream data traffic channel (PDSCH, Physical Downlink Shared Channel enhancing down control channel (EPDCCH, the Enhanced Physical of part PRB resource areas in) DownlinkControl Channel) carry, it can dispatch 1ms TTI business.Relative to current 1ms TTI length Subframe, contain the shortening TTI of less OFDM symbol as a kind of short TTI of new granularity (sTTI, short TTI), sTTI length Degree is less than 1ms, and possible length is to include 1-7 OFDM symbol.

The descending control of short TTI and its related service scheduling is supported for lacking in low time delay communication scenes in correlation technique The problem of information, effective solution is not yet provided at present.

The content of the invention

The embodiments of the invention provide a kind of transmission method of Downlink Control Information, apparatus and system, at least to solve phase The problem of lacking the Downlink Control Information for supporting short TTI and its related service scheduling in the technology of pass in low time delay communication scenes.

According to one embodiment of present invention, there is provided a kind of transmission method of Downlink Control Information, including：Pass through tradition At least one of Physical Downlink Control Channel legacy PDCCH, enhancing Physical Downlink Control Channel EPDCCH, SPDCCH carrying For the DCI for the UE for dispatching sTTI, the SPDCCH is the Physical Downlink Control Channel in sTTI；The DCI of carrying is sent out Deliver to terminal；Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：Traffic Channel in only sTTI； The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

Alternatively, when the DCI is used for scheduling traffic channel, including at least one in the following manner：It is described to be used to dispatch STTI UE DCI size is identical with the DCI sizes for dispatching 1ms PDSCH, and is made a distinction by RNTI, including logical The different values for crossing the RNTI that different types of RNTI different values make a distinction or pass through same type make a distinction； The DCI for being used to dispatch sTTI UE is located at different search spaces from the DCI for dispatching 1ms PDSCH；Pass through one-level DCI Or the DCI of the sign differentiation UE for being used to dispatch sTTI in two-stage DCI first order DCI is to be used to dispatch 1ms Traffic Channel in TTI is still used to dispatch the Traffic Channel in sTTI.

Alternatively, the message of the Traffic Channel carrying in the 1ms TTI includes at least one of：UE unicast messages, Either cell broadcast messages or one group of UE public message, or cell-level or one group of UE system variation message informing letter Breath.

Alternatively, when the Downlink Control Information is two-stage DCI, Traffic Channel is indicated by way of at least one of Schedule information：The first order and the second level in two-stage DCI collectively form complete schedule information；The second level in two-stage DCI Include complete schedule information.

Alternatively, methods described also includes：By eNB by high-level signaling SIB or RRC notify using the mode wherein it One of one or the described mode of predefined use.

Alternatively, at least one following information is included in the first order DCI of the two-stage DCI：Instruction carrying second level DCI SPDCCH detection when required parameter information, the second level DCI include scheduling sPDSCH and/or sPUSCH the second level DCI；The information of DMRS port or reserved RE when indicating to carry second level DCI SPDCCH and/or SPDSCH rate-matcheds；Refer to Show that carrying second level DCI SPDCCH and/or SPDSCH demodulation uses pilot tone CRS and/or DMRS information；Indicate SPDSCH Transmission mode information；Indicate the carrying second level DCI SPDCCH and/or SPDSCH are based on whether using when CRS is demodulated DMRS information；Whether instruction carrying second level DCI SPDCCH and/or SPDSCH uses CRS letter when being demodulated based on DMRS Breath；Indicate the information of PRB positions where used DMRS during carrying second level DCI SPDCCH and/or SPDSCH demodulation；Refer to Show the information of downlink DL sTTI band frequency domain positions and/or up-link UL sTTI band frequency domain positions；Indicate DL The information of sTTI length and/or UL sTTI length；Indicate that DL sTTI bindings transmission number and/or UL sTTI bindings pass The information of defeated number.

Alternatively, required parameter includes at least one of during the SPDCCH detections of the carrying second level DCI：Polymerization etc. Level, Candidate Set quantity, search space frequency domain position, search space time-domain position, SPDCCH scrambling parameters, SPDCCH are used The DMRS port that DMRS scrambling parameters, SPDCCH transmission modes, SPDCCH demodulation use.

Alternatively, instruction carrying second level DCI SPDCCH detections when institute is included in the first order DCI of the two-stage DCI When needing the information of parameter, the first order DCI indicates RRC or the SIB configuration on the parameter basis that RRC or SIB is configured The subset of parameter, the subset include the subset of parameter species, and/or the subset of parameter value scope.

Alternatively, at least one following information is included in the second level DCI of the two-stage DCI：It is common in the two-stage DCI When forming full schedule information, the information comprising resource allocation and the resource allocation in first order DCI in the second level DCI On the basis of indicate；When the second level in the two-stage DCI includes complete schedule information, included in the second level DCI The information of resource allocation；Indicate sPDSCH and/or sPUSCH resource allocation informations；Indicate DMRS ends during SPDSCH rate-matcheds The information of mouth or reserved RE；Indicate the information of PRB positions where used DMRS during SPDSCH demodulation；Indicate DL sTTI's The information of length and/or UL sTTI length；Indicate DL sTTI bindings transmission number and/or UL sTTI binding transmission numbers Information.

Alternatively, the update cycle of the first order DCI in the two-stage DCI is configured by high-level signaling SIB or RRC.

Alternatively, in the case where the SPDCCH is based on DMRS demodulation, methods described also includes：As the DMRS and institute State UE SPDSCH share when, the using priciple of SPDSCH ports includes at least one of：Used in RI=1 and SPDCCH The DMRS of identical port；RE positions identical port where the DMRS with SPDCCH is used in RI=2；In RI>Preferentially make when 2 The RE positions identical port where the DMRS with SPDCCH, secondly using the end different from RE positions where SPDCCH DMRS Mouthful；SPDSCH ports are indicated by DCI with reference to sPDCCH transmission means；When the DMRS and the non-UE SPDSCH are shared When, SPDSCH ports using priciple includes at least one of：It is preferential to use and SPDCCH DMRS places RE positions identical Port, secondly using the port different from RE positions where SPDCCH DMRS.

Alternatively, the DMRS resource locations use different occupancy sides according to whether sPDCCH and sPDSCH share DMRS Formula.

Alternatively, when the SPDCCH and SPDSCH DMRS frequency domain positions shared are located at part PRB, the SPDCCH Include at least one of with the SPDSCH DMRS frequency domain positions shared：In PRB where being only located at SPDCCH；It is located at least in In PRB where SPDCCH；In the PRB chosen in the PRB resources equal intervals of SPDCCH or SPDSCH occupancy.

Alternatively, the scrambling initial method of the SPDCCH includes：The scrambling initial method of the SPDCCH is son Each sTTI is independently scrambled in frame or in radio frames, wherein in subframe in first sTTI or in Legacy PDCCH regions SPDCCH scrambling initialization meetsc_initTo scramble initialization value, n_sFor timeslot number,To be small Area's identification number.

Alternatively, when the DCI is for dispatching the Traffic Channel in 1ms TTI, the 1ms of processing delay reduction is supported The scheduling for the 1ms TTI Traffic Channels that the scheduling of TTI Traffic Channels or processing delay do not reduce, scheduling mode include it is following at least One of：1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays, and the content in by DCI is implicit true When being set to TBS value less than default TBS threshold values, performing 1ms TTI time delays reduces, and otherwise performing 1ms TTI time delays does not reduce； 1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays, and shows that instruction is by individual bit domain in DCI No execution 1ms TTI time delays reduce；1ms TTI time delays, which reduce not reduce with 1ms TTI time delays, uses respective DCI format.

Alternatively, when dispatching 1ms TTI Traffic Channels by the DCI, in addition to：Pass through high-level signaling SIB or RRC Whether configuration performs the reduction of 1ms TTI time delays.

Alternatively, when the 1ms TTI processing delay reduces, uplink data scheduling time delay or downlink data feedback delay k Meet 0<k<4 and be integer, and k value mode includes at least one of：ENB and UE sides use identical fixed k, or ENB and UE sides use different fixed ks respectively；Downlink and uplink uses identical fixed k, or downlink and uplink to make respectively With different fixed ks；Identical k values are notified to eNB and UE sides by DCI or SIB or RRC, or pass through DCI or SIB or RRC Different k values are notified eNB and UE sides；Identical k values are notified to downlink and uplink by DCI or SIB or RRC, or pass through DCI Or SIB or RRC notifies downlink and uplink different k values.

Alternatively, the DCI be used for dispatch 1ms TTI time delays reduce or sTTI reverse link traffic channel when, instruction it is up HARQ process numbers and/or redundancy versions RV include at least one in the following manner：When not reduced using 1ms TTI time delays in DCI Fixed bit domain is indicated after being reinterpreted；Indicated by individual bit domain in DCI；Added by different RNTI values Disturb CRC implicit indications.

Alternatively, in any one-level DCI during the DCI is single-stage DCI or two-stage DCI, untapped sPDCCH is indicated Resource mode includes at least one in the following manner：When only including dispatching the sPDCCH of the sPDSCH in sPDSCH frequency domains Or when only having 1 sPDCCH in search space, give tacit consent to other moneys in addition to the sPDCCH in the sPDSCH frequency domains Source allows to use, or whether surplus resources allow to use in search space where indicating the sPDCCH by 1bit in DCI； When there are multiple sPDCCH in search space, untapped Candidate Set is indicated when Candidate Set takes the search space；Controlling Channel Elements indicate untapped control channel unit when taking the search space；This is taken in resource unit group or resource block to search Untapped resource unit group or resource block are indicated during rope space；Indicated when resource unit takes the search space untapped Resource unit.

Alternatively, indicating range corresponding to the instruction includes at least one of：Indicated in sPDSCH frequency domains The untapped resources of sPDCCH；The untapped resources of sPDCCH are indicated in sTTI band frequency domains；The SS where sPDCCH The untapped resources of middle instruction sPDCCH；The money that sPDCCH is not used is indicated in all SS or sTTI band frequency domains Source.

Alternatively, the Traffic Channel in the DCI dispatches sTTI, and when sTTI length is unknown, detecting DCI mode includes At least one of：Blind check is attempted respectively according to sPDCCH test positions different corresponding to different sTTI length；Different sTTI SPDCCH test positions corresponding to length are identical but matched according to respective pilot tone pattern in different sTTI length with different rates Mode is attempted to demodulate respectively；SPDCCH test positions corresponding to different sTTI length are identical and according to same in sPDCCH regions Matching way attempts demodulation to the pilot tone of position at the same rate.

Alternatively, when the DCI supports to dispatch different TTI length and the support Traffic Channel whether time delay reduces, institute The occupation mode for stating DCI comprises at least one below：The TTI=2 OFDM symbol, TTI=1 time slot, 1ms TTI time delays Reduce and 1ms TTI time delays do not reduce and use identical DCI format；1ms TTI time delays, which reduce not reduce with 1ms TTI time delays, to be made With a kind of DCI format, TTI=2 OFDM symbol and TTI=1 time slot use another DCI format or two-stage DCI；1ms TTI time delays are not reduced using a kind of DCI format, and TTI=2 OFDM symbol, TTI=1 time slot and 1ms TTI time delays, which reduce, to be made With another DCI format or two-stage DCI；1ms TTI time delays reduce, 1ms TTI time delays do not reduce and TTI=1 time slot uses A kind of DCI format, TTI=2 OFDM symbol use another DCI format or two-stage DCI；1ms TTI time delays do not reduce use A kind of DCI format, 1ms TTI time delays, which reduce, uses another DCI format, and TTI=2 OFDM symbol and TTI=1 time slot make With another DCI format or two-stage DCI；1ms TTI time delays are not reduced using a kind of DCI format, 1ms TTI time delays reduce and TTI=1 time slot uses another DCI format, and TTI=2 OFDM symbol uses another DCI format or two-stage DCI.

According to another embodiment of the present invention, there is provided the transmission method of another Downlink Control Information, including：Receive logical Cross in conventional physical down control channel legacy PDCCH, enhancing Physical Downlink Control Channel EPDCCH, SPDCCH at least it The Downlink Control Information DCI, the SPDCCH of the terminal UE for dispatching short transmission time interval sTTI of one carrying are sTTI In Physical Downlink Control Channel；The UE is scheduled using the DCI；Wherein, the DCI is used for the Traffic Channel dispatched Including at least one of：Traffic Channel in only sTTI；The Traffic Channel in Traffic Channel or 1ms TTI in sTTI； The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

According to another embodiment of the present invention, there is provided a kind of transmitting device of Downlink Control Information, positioned at base station, bag Include：Carrier module, for passing through conventional physical down control channel legacy PDCCH, enhancing Physical Downlink Control Channel At least one of EPDCCH, SPDCCH carry the DCI of the UE for dispatching sTTI, and the SPDCCH is the physical down in sTTI Control channel；Sending module, for the DCI of carrying to be sent to terminal；Wherein, the DCI is used for the business letter dispatched Road includes at least one of：Traffic Channel in only sTTI；The Traffic Channel in Traffic Channel or 1msTTI in sTTI； The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

According to another embodiment of the present invention, the transmitting device of another Downlink Control Information is additionally provided, positioned at terminal UE, including：Receiving module, controlled for receiving by conventional physical down control channel legacyPDCCH, enhancing physical down The Downlink Control Information for being used to dispatch short transmission time interval sTTI UE of at least one of channel EPDCCH, SPDCCH carrying DCI, the SPDCCH are the Physical Downlink Control Channel in sTTI；Scheduler module, for being scheduled using the DCI；Its In, the Traffic Channel that the DCI is used to dispatch includes at least one of：Traffic Channel in only sTTI；Business in sTTI Traffic Channel in channel or 1ms TTI；The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

According to one more embodiment of the present invention, there is provided a kind of Transmission system of Downlink Control Information, including above-mentioned be located at The transmitting device of the Downlink Control Information of base station, and the transmitting device of the above-mentioned Downlink Control Information positioned at terminal.

According to still another embodiment of the invention, a kind of storage medium is additionally provided.The storage medium is arranged to storage and used In the program code for performing following steps：Carried by least one of legacy PDCCH, EPDCCH, SPDCCH for dispatching STTI UE DCI, the SPDCCH are the Physical Downlink Control Channel in sTTI；The DCI of carrying is sent to terminal； Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：Traffic Channel in only sTTI；Industry in sTTI The Traffic Channel being engaged in channel or 1ms TTI；The Traffic Channel in Traffic Channel and 1msTTI in sTTI.

Alternatively, storage medium is also configured to the program code that storage is used to perform following steps：Reception passes through legacy The DCI for being used to dispatch sTTI UE of at least one of PDCCH, EPDCCH, SPDCCH carrying, the SPDCCH are in sTTI Physical Downlink Control Channel；The UE is scheduled using the DCI；Wherein, the Traffic Channel that the DCI is used to dispatch includes At least one of：Traffic Channel in only sTTI；The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；In sTTI Traffic Channel and 1ms TTI in Traffic Channel.

By the present invention, the DCI of the UE for dispatching sTTI is carried on Legacy PDCCH, EPDCCH and SPDCCH At least one in, and be sent to UE, solve in low time delay communication scenes to lack in correlation technique and support short TTI and its related industry The problem of Downlink Control Information of business scheduling, give and support short TTI scheduling and its related different length TTI traffic scheduling Implementation, ensure time delay communication requirement.

Brief description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：

Fig. 1 is a kind of flow chart of the transmission method of Downlink Control Information according to embodiments of the present invention；

Fig. 2 (a) is the exemplary plot one of sCCE/sREG according to embodiments of the present invention building form；

Fig. 2 (b) is the exemplary plot two of sCCE/sREG according to embodiments of the present invention building form；

Fig. 2 (c) is the exemplary plot three of sCCE/sREG according to embodiments of the present invention building form；

Fig. 3 is a kind of structured flowchart of the transmitting device of Downlink Control Information according to embodiments of the present invention；

Fig. 4 is the flow chart of the transmission method of another Downlink Control Information according to embodiments of the present invention；

Fig. 5 is the structured flowchart of the transmitting device of another Downlink Control Information according to embodiments of the present invention；

Fig. 6 is the structured flowchart of the Transmission system of Downlink Control Information according to embodiments of the present invention；

Fig. 7 is SPDCCH according to the preferred embodiment of the invention only in sTTI in first OFDM symbol in the sPRB of part Take the schematic diagram of resource；

Fig. 8 is that the DMRS in PRB where SPDCCH according to the preferred embodiment of the invention needs to show with what SPDSCH was shared It is intended to；

Fig. 9 is part PRB where SPDSCH according to the preferred embodiment of the invention without sharing showing for DMRS with SPDCCH It is intended to.

Embodiment

Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting In the case of, the feature in embodiment and embodiment in the application can be mutually combined.

It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " Two " etc. be for distinguishing similar object, without for describing specific order or precedence.

How to be supported simultaneously in view of the DCI of the scheduling sTTI business needed to use, and scheduling sTTI business DCI 1ms TTI and sTTI are dispatched, it is necessary to provide a kind of transmission method of the Downlink Control Information suitable for low time delay demand.

Based on above-mentioned consideration, the embodiment of the present invention proposes a kind of transmission method of Downlink Control Information, with it, Downlink Control Information design problem in the short TTI comprising less OFDM symbol is can solve the problem that, supports that short TTI is dispatched and difference is long TTI traffic scheduling problems are spent, ensure time delay communication requirement.

In the present embodiment, there is provided a kind of transmission method of Downlink Control Information, Fig. 1 are according to embodiments of the present invention A kind of flow chart of the transmission method of Downlink Control Information, as shown in figure 1, this method comprises the following steps：

Step S102, pass through conventional physical down control channel (Legacy PDCCH), enhancing Physical Downlink Control Channel (EPDCCH) and at least one of SPDCCH (Short PDCCH) carries the terminal for dispatching short transmission time interval (sTTI) (UE) Downlink Control Information (DCI), the SPDCCH are the Physical Downlink Control Channel in sTTI；

Step S104, the DCI of carrying is sent to terminal.

Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

The present embodiment by above-mentioned steps, by the DCI of the UE for dispatching sTTI be carried on LegacyPDCCH, EPDCCH, In at least one SPDCCH, and be sent to UE, solve lack in correlation technique in low time delay communication scenes support short TTI and its The problem of Downlink Control Information of related service scheduling, give and support short TTI scheduling and its related different length TTI industry The implementation of business scheduling, ensures time delay communication requirement.Legacy PDCCH, EPDCCH herein mainly describes LTE Legacy PDCCH, EPDCCH in system.

As a kind of preferred embodiment, when the DCI is used for scheduling traffic channel, in the following manner can be included at least One of：

A, the size (size) and the size of the DCI for dispatching 1msPDSCH for being used to dispatch sTTI UE DCI (size) it is identical, and made a distinction by RNTI, including make a distinction or lead to by different types of RNTI different values The different values for crossing the RNTI of same type make a distinction.For example, it can pass through one-level DCI or two-stage DCI first order DCI's It is for dispatching Traffic Channel in 1ms TTI or for dispatching the business in sTTI that different scrambling codes RNTI, which distinguishes the DCI, Channel.Preferably, can be used for only dispatching the Traffic Channel in sTTI；Or Traffic Channel or 1ms TTI in scheduling sTTI In Traffic Channel；Or the Traffic Channel in the Traffic Channel and 1ms TTI in scheduling sTTI.

B, the DCI for being used to dispatch sTTI UE are located at different search spaces from the DCI for dispatching 1ms PDSCH. Area can be carried out by limiting the search space (Search Space, referred to as SS) residing for the DCI for dispatching different business channel Point, such as it is located at CSS or USS respectively, respectively positioned at Legacy search spaces and the search space newly defined.Preferably, can be with For only dispatching the Traffic Channel in sTTI；Dispatch the Traffic Channel in sTTI or the Traffic Channel in 1ms TTI；Dispatch sTTI In Traffic Channel and 1ms TTI in Traffic Channel.

C, the UE for being used to dispatch sTTI is distinguished by the sign in one-level DCI or two-stage DCI first order DCI DCI be for dispatching Traffic Channel in 1ms TTI or for dispatching the Traffic Channel in sTTI.This method preferably can be with For dispatching situation during Traffic Channel in Traffic Channel in sTTI or 1msTTI.

Alternatively, the message of the Traffic Channel carrying in the 1ms TTI can include at least one of：UE unicasts disappear Breath, either cell broadcast messages or one group of UE public message, or cell-level or one group of UE system variation message informing Information.

As a kind of preferred embodiment, the Downlink Control Information (DCI) can be one-level DCI or two-stage DCI, wherein The Traffic Channel schedule information indicated when DCI is two-stage DCI can include at least one of：In two-stage DCI the first order and The second level collectively forms complete schedule information；The second level includes full schedule information in two-stage DCI.

For above two mode, when first order DCI in two-stage DCI and second level DCI collectively forms complete scheduling letter During breath, terminal can not demodulate slow DCI will skip to next subframe continue detect slow DCI without detecting in this subframe fast DCI.And when the second level includes full schedule information in two-stage DCI, terminal can not demodulate slow DCI and still may proceed to examine Survey fast DCI in this subframe.For example, first order DCI and second level DCI collectively form complete schedule information in two-stage DCI When, the first order and second level DCI are in first order resource allocation base comprising resource allocation information and second level resource allocation Indicated on plinth.When second level DCI includes complete schedule information in two-stage DCI, first order DCI and second level DCI All first order resource allocation is not rely on comprising resource allocation information and second level resource allocation.Or first order DCI bags Detection information needed for the second level DCI containing instruction even if can't detect the first order to reduce second level DCI detection complexities DCI, the parameter detecting second level DCI that terminal still can configure according to high-level signaling RRC or SIB.

It is alternatively possible to by base station (eNB) by high-level signaling RRC or SIB notice using above two mode wherein it One or predefined use one of above two mode.

Alternatively, at least one following information can be included in the first order DCI：

Required parameter during carrying second level DCI SPDCCH detections is indicated, the second level DCI includes scheduling sPDSCH And/or sPUSCH second level DCI, wherein the parameter can include polymerization grade, Candidate Set quantity, search space frequency domain position Put, the DMRS scrambling parameters that search space time-domain position, SPDCCH scrambling parameters, SPDCCH are used, SPDCCH transmission modes, At least one DMRS port that SPDCCH demodulation uses；

DMRS port or reserved RE when indicating to carry second level DCI SPDCCH and/or SPDSCH rate-matcheds, wherein Reserved RE preferably can be RE corresponding to all DMRS ports, or wherein take RE corresponding to identical RE port；

Indicate that carrying second level DCI SPDCCH and/or SPDSCH demodulation uses pilot tone CRS and/or DMRS；

Indicate SPDSCH transmission mode；

Indicate that the carrying second level DCI SPDCCH and/or SPDSCH are based on whether using DMRS when CRS is demodulated；

Indicate that the carrying second level DCI SPDCCH and/or SPDSCH are based on whether using CRS when DMRS is demodulated；

Indicate PRB positions where used DMRS during carrying second level DCI SPDCCH and/or SPDSCH demodulation；

Indicating downlink link (DL) sTTI bandwidth (band) frequency domain position and/or up-link (UL) sTTI bandwidth (band) Frequency domain position, wherein the frequency domain position preferably can be the part or all of PRB in instruction LTE system bandwidth；

Indicate DL sTTI length (length) and/or UL sTTI length (length)；

Indicate DL sTTI bindings (bundling) transmission number and/or UL sTTI bindings (bundling) transmission number.

Alternatively, during the first order DCI instruction carrying second level DCI SPDCCH detections during required parameter, in RRC or On the parameter basis of SIB configurations, the subset of the parameter of the RRC or SIB configurations is indicated.The subset can include parameter species Subset, and/or the subset of parameter value scope.

Alternatively, at least one following information can be included in the second level DCI：

When the two-stage DCI collectively forms full schedule information, comprising resource allocation and in the first order in the DCI of the second level Indicated in DCI on the basis of resource allocation；

When the second level in the two-stage DCI includes complete schedule information, resource allocation is included in the DCI of the second level；

Indicate sPDSCH and/or sPUSCH resource allocation informations；

DMRS port or reserved RE during instruction SPDSCH rate-matcheds, it preferably can be all DMRS ports pair to reserve RE The RE answered, or wherein take RE corresponding to identical RE port；

Indicate PRB positions where used DMRS during SPDSCH demodulation；

Indicate DL sTTI length (length) and/or UL sTTI length (length)；

Alternatively, first order DCI update cycle can be configured by high-level signaling SIB or RRC in the two-stage DCI.Should Mode can apply in the case of fast DCI have full schedule information, when certain slow DCI demodulates mistake, but still In the range of update cycle, the slow DCI instructions before use, to reduce fast DCI demodulated complex degree.

As a kind of preferred embodiment, in the case where the SPDCCH is based on DMRS demodulation,

When the DMRS and this UE SPDSCH is shared, SPDSCH ports using priciple includes at least one of：

The DMRS of port identical with SPDCCH is used in RI=1；

RE positions identical port where the DMRS with SPDCCH is used in RI=2；

In RI>Preferential RE positions identical port where using the DMRS with SPDCCH when 2, secondly using with SPDCCH's The different port in RE positions where DMRS；

SPDSCH ports are indicated by DCI with reference to sPDCCH transmission means, for example, can include：SPDSCH is indicated in DCI Port is in use, can not indicate during sPDSCH single layer transmissions, or instruction uses RE identicals end where DMRS with sPDCCH Mouthful, sPDCCH uses portx1, sPDSCH also to use port x1, or the port x2 using RE positions identical with port x1. It can not be indicated during bis- layers of transmission of sPDSCH, corresponding port be used according to sPDCCH transmission means, when sPDCCH transmission means During using port x1, sPDSCH uses port x1, the x2 of RE positions identical with port x1, when sPDCCH transmission means uses When port x1, y1, sPDSCH uses port x1, the x2 of RE positions identical with port x1, or RE positions identical with port y1 Port y1, the y2 put, port x1, y1 (preferably) or instruction port corresponding with sPDCCH transmission means are either used, when When sPDCCH transmission means uses port x1, instruction sPDSCH uses port x1, the x2 of RE positions identical with port x1, when When sPDCCH transmission means uses port x1, y1, sPDSCH uses port x1, the x2 of RE positions identical with port x1, or Port y1, the y2 of RE positions identical with port y1, or use port x1, y1 (preferably).It is more than two layers when sPDSCH is used It during transmission, can not indicate, corresponding port is used according to transmission means, when sPDCCH transmission means uses port x1, SPDSCH uses port x1, x2, x3 ... of RE positions identical with port x1, when sPDCCH transmission means uses port x1, y1 When, sPDSCH uses port x1, x2, x3 ... of RE positions identical with port x1, or identical with port y1 RE positions Port y1, y2, y3 ..., either using port x1, y1, x2, y2 ... (preferably) or instruction sPDSCH uses and port x1 Port x1, x2, x3 ... of identical RE positions, when sPDCCH transmission means uses port x1, y1, sPDSCH is used and port Port x1, x2, x3 ... of the identical RE positions of x1, either port y1 of RE positions identical with port y1, y2, y3 ... or make With port x1, y1, x2, y2 ... (preferably)；

When the DMRS and non-UE SPDSCH is shared, SPDSCH ports using priciple includes at least one of：

Preferential RE positions identical port where using the DMRS with SPDCCH, next is used where the DMRS with SPDCCH The different port in RE positions.

Alternatively, the DMRS resource locations can be accounted for according to whether sPDCCH and sPDSCH share DMRS using different Use mode.For example, if sPDCCH and sPDSCH shares DMRS, possible DMRS resource occupancy modes are as described below, are located at Part PRB, comprising in PRB where being only located in PRB where SPDCCH, being located at least in SPDCCH, positioned in SPDCCH or The PRB that the PRB resources equal intervals that SPDSCH takes are chosen is medium；If sPDCCH and sPDSCH does not share DMRS, DMRS Resource occupancy mode may be each PRB have, the PRB that chooses positioned at the PRB resources equal intervals that are taken in SPDSCH it is medium.

Alternatively, when the DMRS frequency domain positions that the SPDCCH and SPDSCH is shared are located at part PRB, including following occupancy At least one mode：

In PRB where being only located at SPDCCH；

In PRB where being located at least in SPDCCH；

In the PRB chosen in the PRB resources equal intervals of SPDCCH or SPDSCH occupancy.Such as：In max { SPDCCH takes PRB resources, and SPDSCH takes PRB resources } equal intervals take.

Alternatively, the scrambling initial method of the SPDCCH is that each sTTI is independently scrambled in subframe or in radio frames, SPDCCH scrambling initialization wherein in subframe in first sTTI or in Legacy PDCCH regions meetsc_initTo scramble initialization value, n_sFor timeslot number,For cell (Cell) mark (ID) number.

As a kind of preferred embodiment, when the DCI is used to dispatch the Traffic Channel in 1ms TTI, when supporting processing Prolong the scheduling of the 1ms TTI Traffic Channels of reduction or the scheduling of 1msTTI Traffic Channels that processing delay does not reduce.Including following At least one mode：

Mode one：1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays.By (such as being provided in DCI RA and modulation coding mode MCS is distributed in source) when being less than default TBS threshold values, now TBS is smaller, can for the implicit value for being defined as TBS To perform the reduction of 1ms TTI time delays, otherwise 1ms TTI time delays are supported not reduce.

Mode two：1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays.Pass through independent ratio in DCI Special domain, which is shown, indicates whether that performing 1ms TTI time delays reduces.

Mode three：1ms TTI time delays reduce not to be reduced using respective DCI format (format) with 1ms TTI time delays.

Alternatively, when the 1ms TTI processing delay reduces, 0<k<4 and be integer, k value modes include it is following at least One of：

Mode one：Fixed value, including eNB and UE sides use identical k values, or eNB and UE sides respectively using not respectively Same k values；Downlink and uplink uses identical k values, or downlink and uplink to use different k values respectively respectively.

Mode two：On-fixed value, k values are notified by DCI or SIB or RRC, including identical k is notified to eNB and UE sides Value, or different k values are notified eNB and UE sides；Identical k values are notified downlink and uplink, or to downlink and uplink notice not Same k values.

Wherein, k represents uplink data scheduling time delay, or represents downlink data feedback delay.At present in LTE system for FDD system k=4, for TDD system, k >=4.(follow-up abbreviation time delay reduces), time delay when processing delay described here reduces Less than current LTE system, now k values are the positive integer less than 4.

Specifically, for how to determine that performing 1ms TTI time delays reduces, and is broadly divided into dynamic and semi-static mode：

Dynamical fashion：

Mode one：Implied in DCI and determine during small TBS, to be carried out 1ms (by resource allocation RA+ Modulation and Coding Scheme MCS) TTI time delays reduce.Now DCI is without influence.This certain mode also needs to determine limited TBS threshold value sizes.TBS threshold values： Fixed or SIB/RRC can configure.From the point of view of different UE abilities, tendency RRC configuration TBS threshold values.

Mode two：Display indicates whether that performing 1ms TTI time delays reduces in DCI.TBS threshold values are not needed now, completely Determined by DCI dynamic dispatchings.Now DCI is the DCI for introducing new bit field.Such as it can add in DCI during the reduction of 1ms TTI time delays Add PUCCH resource instruction, newly-designed RA.Now small TBS is not necessarily carried out the reduction of 1ms TTI time delays.

For mode two, when DCI is still existing format.Submethod 1：If used for are increased to format 0/4 Latency reduction mode execution condition.The DCI size for now increasing new bit field are no more than former legacy Format 0/4 size, that is, need to compress other bit fields (such as RA), new design be present.Submethod 2：Directly in format 0/4 increase bit field, other situations reserved when not in use.Corresponding format 1A may mend padding.

For mode two, when DCI is new format.Whether other bit fields newly design.

In addition, if performing 1ms TTI time delays reduces, including：Indicate whether to perform by 1bit in DCI or SIB/RRC 1ms TTI time delays reduce, or indicate one of k value sets by x bit in DCI or SIB/RRC, or pass through x bit in SIB/RRC Indicate k value sets.

In addition, above two mode can support when 1ms TTI time delays reduce k values only one or more.For mode one, K values can be notified when not unique by RRC, for mode two, can be notified when k values are not unique by DCI or RRC.In addition, 1ms TTI time delays include two kinds of situations when reducing：ENB k values identical with UE, or eNB and UE different value of K.Such as：ENB and UE are equal Up-downgoing scheduling and up-downgoing feedback timing are performed with identical k values such as k=2, or the difference in view of disposal ability, eNB and UE is performed with different k values respectively.Further, k values are unique when 1ms TTI time delays reduce, including two kinds of situations：ENB and UE phases With k values, or eNB and UE different value of K.Example：K value sets 1,2,3,4, (4,2), (2,4), (4,3), (3,4), (2,3), (3, 2)}。

Semi-static mode：

Whether the SIB/RRC configurations of increase high-level signaling perform the reduction of 1ms TTI time delays.

Mode one：1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays.With dynamical fashion one.This When TBS can not be too big, semi-static the small TBS of only distribution.

Mode two：1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays.With dynamical fashion two.It is complete Determined entirely by scheduling, and semi-static execution one of which.

Mode three：1ms TTI time delays, which reduce not reduce with 1ms TTI time delays, uses respective DCIformat.Semi-static Using only one of which.

The executable time delays of new UE are given tacit consent to when no high-level signaling to be reduced.Difference is：When having high-level signaling configuration, It is delayed when configuring new UE and not performing 1ms TTI, the reduction of 1ms TTI time delays is not performed even if small TBS yet, only in high-level signaling When configuration can perform, just further performing 1ms TTI time delays in small TBS reduces.When being configured without high-level signaling, for New UE, in small TBS, performing 1ms TTI time delays certainly reduces.

When all TBS sizes can support that time delay reduces, stand good in the above method, be without distinguishing only No is small TBS and possible TBS threshold values.If only small TBS can perform k=2, eNB configurations (it is semi-statically configured, But it is actual regularly to change with TBS sizes dynamic) determine whether terminal performs the reduction of 1ms time delays in small TBS, additionally, TBS doors Limit value can arrangement.If no matter TBS sizes can carry out k=2, tendency eNB is semi-statically configured terminal in k=2 and k= Change between 4, without DCI dynamic instructions k=2 or k=4.

As a kind of preferred embodiment, the DCI is used to dispatch the reduction of 1ms TTI time delays or sTTI uplink service letter During road, indicate that ascending HARQ course number and/or redundancy versions (Redundancy Versions, referred to as RV) include in the following manner At least one：

Mode one：Existing bit domain when not reduced using 1ms TTI time delays in DCI is referred to after being reinterpreted Show.

Mode two：Indicated by individual bit domain in DCI.

Mode three：CRC implicit indications are scrambled by different RNTI values.

Specifically, when PUSCH or sPUSCH uses asynchronous UL HARQ, UL grant need to introduce UL HARQ process numbers (2~4bits), RV (1~2bits).

Possible method is as follows：

Method one：Use existing DCI format (format)

Selection 1:Existing bit field is explained again.Such as：UL HARQ process numbers 2bit, RV 1bit pass through DMRS CS/OCC Bit field 3bit is realized and UE DMRS CS/OCC are fixed or RRC configurations.

Selection 2:Pass through RNTI.Such as：UL HARQ process numbers, RV are determined by UE multiple different C-RNTI.Now need The how individual C-RNTI of UE, and clearly different C-RNTI values and process number, the corresponding relation of RV versions are distributed to by RRC.

Method two：DCI is the DCI for introducing new bit field.I.e. UL HARQ process numbers, RV are as individual bit domain.

Selection 1:Newly add in existing format 0/4.DCI is still existing format.UL is increased to format 0/4 HARQ process numbers, RV, i.e., the reserved during situation that remaining time delay does not reduce.Extra, format 1A may need to mend padding。

Selection 2:DCI is new format.After UL HARQ process numbers, RV is added, newly whether design is equal for other bit fields Can.

In addition, process number bit field size during for different size of TTI (symbol of such as TTI=2,7,14) can use Different size bit field, or the maximum size corresponding to number of passes that enters in different TTI are defined.

As a kind of preferred embodiment, when the DCI is any one-level DCI in single-stage DCI or two-stage DCI, instruction is not The sPDCCH resource modes used include at least one in the following manner：

Mode S1：When only including dispatching its sPDCCH in sPDSCH frequency domains or when only 1 in search space During sPDCCH, give tacit consent to other resources in the sPDSCH frequency domains in addition to the sPDCCH and can be used, or lead in DCI Cross whether surplus resources in search space where 1bit indicates the sPDCCH can use.

Mode S2：When there are multiple sPDCCH in search space, indicate to be not used when Candidate Set takes the search space Candidate Set；Untapped control channel unit is indicated when control channel unit takes the search space；In resource unit group Or resource block indicates untapped resource unit group or resource block when taking the search space；Search sky is taken in resource unit Between when indicate untapped resource unit；

Alternatively, indicating range corresponding to the instruction includes at least one in the following manner：

(mode 1) indicates the resource that sPDCCH is not used in sPDSCH frequency domains.

(mode 2) indicates the resource that sPDCCH is not used in sTTI band frequency domains.

Instruction sPDCCH does not make in (mode 3) where sPDCCH search space (Search Space, referred to as SS) Resource.

(mode 4) indicates the resource that sPDCCH is not used in all SS or sTTI band frequency domains.

Specifically, considering the possible two ways of sPDCCH resource occupation (TDM, FDM), instruction granularity considers

When TDM modes and when in first OFDM symbol, mode 1：Take whole frequency domain resources：(similar PDCCH Region frequency domains take full bandwidth).Indicate untapped REG or RB (fine granularity)；Indicate untapped CCE or Candidate Set (coarse-grain)；(CRS positions UE is known).Mode 2：Take part frequency domain resource：Indicate untapped sREG or RB；Refer to Show untapped CCE or Candidate Set.Mode 2-1 when all UE only have a short TTI SS, indicate be not used RB or SCCE.Mode 2-2 is when all UE have more than 1 short TTI SS, in the only possible SS using oneself of sPDSCH During untapped resource, indicate that RB or sCCE is not used in the SS of oneself, controlled suitable for the self-contained DL of DL business.In sPDSCH It may use during untapped resource in other SS, it is necessary to indicate that RB is not used in all SS, also indicate all SS frequency domain Scope.

When FDM modes (two OFDM symbols can take), mode 1 is in (2OFDM symbols, 1RB) minimum particle size mode When taking resource：Indicate untapped RB or CCE or Candidate Set.Mode 2 in (1OFDM symbols, 1RB) minimum particle size mode or When EREG takes resource：Untapped sCCE or Candidate Set are indicated, now with TDM modes, all UE is equally existed and is gone back with 1 The problem of being multiple short TTI SS, when there are multiple short TTI SS, do not make when sPDSCH may be used in other SS During with resource, all SS frequency domain is also indicated.

Indicate that the expense of sPDCCH unused resources considers：Assuming that resource granularity is Candidate Set>sCCE>RB/sREG>RE：

Consider for aforesaid way S2 instruction expenses, should not be too large in DCI, it is contemplated that about 2~4bit or so.In candidate Collection indicates untapped Candidate Set when taking the search space, when all Candidate Sets of detection take SS：Indicate in N number of Candidate Set Untapped Candidate Set sequence number.N determination：Selection 1. only has 1 SS or only for the SS of oneself, (more UE are total to when there is multiple SS Enjoy SS)：Consider that total blind check number is divided equally in each sTTI, N values from the point of view of Candidate Set, at 2~4, to indicate untapped candidate Collection expense more saves 2-4bit, can converse corresponding sCCE or RB or sREG resources afterwards.2.sPDSCH is selected from bag When containing sPDCCH (single UE exclusively enjoys SS)：Resource that can be only with 1bit instructions in addition to sPDCCH takes is available or can not With.When selection 3. has multiple SS：According to whole symbol in N values corresponding to sTTI band or scheduled sPDSCH scopes.Expense More than selection 1.Untapped control channel unit is indicated when control channel unit takes the search space, now Candidate Set is not SS is taken, indicates untapped sCCE sequence numbers in N number of sCCE, similar to the above, expense can increase；In resource unit group or resource Block indicates untapped resource unit group or resource block when taking the search space, now CCE does not take SS, indicates N number of sREG Or sREG or RB sequence numbers are not used in RB, expense can be bigger；Untapped money is indicated when resource unit takes the search space Source unit, now expense is maximum.

, can be by realizing in the case of aforesaid way S1 indicates without signaling, the money not used for sPDCCH Source, use during to other sPDSCH resource allocations.Now belong to different in order to avoid there are same PRB distinct symbols sPDSCH.A limitation can be added, the RB that sPDCCH takes must be the RB that sPDSCH takes, and the RA in DCI is only with distributing it The RB of his position.It is but if in view of sPDSCH being taken by granularity of sREG, then a kind of to two kinds of limitation modes of sPDCCH Formed for sCCE/sREG in units of RBG, when another kind is that sCCE/sREG is formed still in units of RB but distributed SS 1 RB in corresponding 4 RB of each RBG can only be distributed.

For sCCE/sREG building form, including at least one in the following manner：

Mode 1：1SREG (1OFDM, 1PRB)=12RE, 1SCCE=3REG.

1SCCE has 36 can use RE when now without CRS, and when there is CRS, 1CCE has 24RE can use；If again with the presence of DMRS, Then accordingly available RE can be less.

Mode 2：1SREG (1OFDM, 1PRB)=12RE, the SREG numbers for forming SCCE be not unique

According to whether there is CRS, CCE SREG numbers difference is formed, now 1SREG (1OFDM, 1PRB)=12RE, referring to Table 5 below：

Table 5

Mode 3：Still defined using REG, CCE.Do not applied to when being demodulated using DMRS.

Mode 4：SREG is that serial number determines after CRS and/or DMRS is subtracted out in X PRB.Afterwards according to ECCE modes Form SCCE.

Mode 5：Unified with Traffic Channel, SCCE/SREG is based on forming in units of RBG or PRG.Such as SCCE is by even Continuous 4RB is 1 REG composition, and now sCCE includes 4 sREG, and 1 sREG is made up of 1 RB.

Example 1：TDM modes 1, as shown in Fig. 2 (a), sPDCCH regions are the 1st whole OFDM symbols, UE1 sPDCCH The resource of occupancy is PRB1,3,5, other sPDCCH occupy PRB4,6, to take resource be PRB1-8 to 8, UE1 sPDSCH. Now need to indicate that PRB2,7 are not used by sPDCCH according to mode 1, need to indicate PRB2,7 ... not by sPDCCH according to mode 2 Use.

Example 2：TDM modes 2, as shown in Fig. 2 (b), now only a short TTI SS is PRB1-8, UE1's SPDSCH takes PRB1-10, and UE1 sPDCCH takes PRB1,3,5, now only needs to indicate PRB2,7 not according to mode 1 or 2 Used by sPDCCH.

Example 3：TDM modes 2, as shown in Fig. 2 (b), now only 2 short TTI SS, first SS are PRB1-6, the Two SS are PRB3-8, and UE1 sPDSCH takes PRB1-10, and UE1 sPDCCH is located at first SS and takes PRB1,3,5, this When only need to indicate PRB2 according to mode 1 or 2,7 do not used by sPDCCH, and it also requires notifying the 2nd SS frequency domain Give the UE1.

Example 4：FDM modes, as shown in Fig. 2 (c), now only a short TTI SS is PRB1-4, UE1 sPDCCH Wherein CCE1 is taken, another sPDCCH takes CCE2, there remains 1 CCE3 and be not used, and now sPDSCH scheduled UE1 is accounted for With PRB1-10, now indicate that CCE3 is not used in the SS according to mode 1 or 2.

As a kind of preferred embodiment, in the DCI scheduling sTTI during Traffic Channel, when sTTI length is unknown, inspection Surveying DCI mode includes at least one of：

Mode 1：Blind check is attempted respectively according to different sTTI length respectively；Including：It is different corresponding to different sTTI length SPDCCH test positions are different；SPDCCH test positions corresponding to different sTTI length are identical but according to each in different sTTI length From pilot tone pattern attempt to demodulate respectively with different rates matching way.

Mode 2：Different sTTI length need not be distinguished and attempt blind check.Including：SPDCCH corresponding to different sTTI length is detected Position it is identical and according in sPDCCH regions same location pilot tone at the same rate matching way attempt demodulation.

Whether specific sPDCCH blind Detectings need to distinguish blind Detecting with different sTTI length, during mainly DMRS-based The problem of demodulation, CRS-based are that the problem is not present in demodulation.

When that can know sTTI length, as slow DCI notify the sTTI length of this subframe, then sPDCCH is blind As long as according to DMRS in specific sTTI during detection --- when that can know sTTIlength, blind Detecting sPDCCH has no problem.

Need to consider different sTTI length when sTTI length can not be known, i.e. during blind check sPDCCH, it is now different STTI lengthy content DMRS RE are different, it is necessary to distinguish blind check sPDCCH according to different sTTI length.(DL sTTI only support 2 or 7 Symbol, problem are concentrated mainly on the beginning of the second time slot, it is assumed that sPDCCH is located at first OFDM symbol in sTTI)：

Mode 1：Blind check respectively

OFDM symbol #6 is detected during sTTI=2 symbols in DL sTTI#3, speed is solved according to the DMRS RE of sTTI=2 symbols Matching；OFDM symbol #7 is detected during sTTI=7 symbols, is demodulated when being located at symbol #9,10 according to DMRS, it is assumed that in symbol #7 There is no DMRS.

Now DMRS designs are assumed to be：During sTTI=7, DMRS is located at symbol 2,3 and symbol 9,10；During sTTI=2, DMRS Simultaneously on two symbols.DMRS gives tacit consent to a port on frequency domain and takes 3 RE.

Mode 2：Unified blind check

STTI=2 symbols and sTTI=7 symbols solve speed in the same manner in OFDM symbol #7 blind check sPDCCH Match somebody with somebody.DMRS for sTTI=2 symbols with DMRS RE positions are identical in OFDM symbol #7 during sTTI=7 symbols.

Now DMRS designs are assumed to be：During sTTI=7, DMRS is located at least in symbol 7；During sTTI=2, DMRS is located at simultaneously On two symbols.DMRS gives tacit consent to a port on frequency domain and takes 3 RE.

Remarks：According in sTTI, (legacy PDCCH regions are removed for first OFDM symbol blind check during other sTTI=2 Outside).During sTTI=7 in first time slot in legacy PDCCH blind Detecting.

As a kind of preferred embodiment, the DCI support to dispatch different TTI length and support whether the industry that time delay reduces During business channel, the DCI occupation modes comprise at least at least one of：

Mode 1：The TTI=TTI=2 OFDM symbol, TTI=1 time slot (such as 7 OFDM symbols), 1ms TTI (such as 14 OFDM symbols) time delay reduces and 1ms TTI time delays do not reduce and use same DCI format, that is, is additionally included in Distinguish whether time delay reduces during 1ms TTI.

Mode 2：1ms TTI time delays reduce and 1ms TTI time delays do not reduce and use same DCI format, TTI=2 OFDM symbol and TTI=1 time slot (such as 7 OFDM symbols) use another DCI format or two-stage DCI, above two DCI Form is different.

Mode 3：1ms TTI time delays are not reduced using a kind of DCI format, TTI=2 OFDM symbol, TTI=1 time slot (such as 7 OFDM symbols) and 1msTTI (such as 14 OFDM symbols) time delay, which reduces, uses another DCI format or two-stage DCI, above two DCI format are different.

Mode 4：1ms TTI time delays reduce, 1ms TTI time delays do not reduce and TTI=1 time slot (such as 7 OFDM are accorded with Number) same identical DCI format is used, TTI=2 OFDM symbol uses another DCI format or two-stage DCI, above two DCI format is different.

Mode 5：1ms TTI time delays are not reduced using a kind of DCI format, and 1ms TTI time delays, which reduce, uses another DCI lattice Formula, TTI=2 OFDM symbol and TTI=1 time slot (such as 7 OFDM symbols) use another DCI format or two-stage DCI, Above-mentioned three kinds of DCI formats are different.

Mode 6：1ms TTI time delays are not reduced using a kind of DCI format, and 1ms TTI time delays reduce and TTI=1 time slot (such as 7 OFDM symbols) use another DCI format, and TTI=2 OFDM symbol uses another DCI format or two-stage DCI, above-mentioned three kinds of DCI formats are different.

Specifically, mode 1 is the equal of a kind of Uniting, i.e., the UE that now supporting time delay reduces uses a kind of DCI. Alt.1 is to be based on existing format 0/1A, increases bit field, and TTI length are configured using RRC.Alt.2 is to be based on Newly-designed DCI format, are indicated using TTI length, and single-level DCI or slow DCI are shared.Advantage：System One DCI designs.Shortcoming：Alt.1 does not support dynamic dispatching PDSCH and sPDSCH.Alt.2 comes for single-level DCI Say except first sTTI has necessity that TTI length are indicated in subframe, indicate it is useless in remaining sTTI.If in new DCI Comprising untapped sPDCCH resources are indicated, then the DCI is improper with PDCCH channel bearings.Therefore for mode 1, relatively it is applicable Different length TTI is supported, is carried by PDCCH in two-level DCI, slow DCI.Now sPDCCH carries fast DCI.It is right When TTI=14, slow DCI include full schedule information.

During for not knowing TTI length when detecting fast DCI or single-level DCI, it can be believed by high level Order is semi-statically configured, or DCI is respectively according to different TTI length blind checks, with mode one or two in G.And do not indicated in DCI During TTI length, now other corresponding bit fields of different TTI length are all identical.

Mode 2 to 4 is to consider two kinds of DCI.Wherein mode 2 and 4, which can be regarded as from the angle of TTI length, distinguishes two kinds Different DCI, mode 3 are that the angle whether reduced from time delay distinguishes two kinds of different DCI.The benefit of mode 2：By 1ms TTI time delays Reduction is treated with a certain discrimination with sTTI, i.e., 1ms TTI time delays reduce and use identical DCI when not reduced with 1ms TTI time delays, use as far as possible Legacy DCI are slightly changed.And sTTI DCI designs then have larger parameter, as two-level DCI, instruction are not used SPDCCH resources etc..The benefit of mode 4：For sTTI=7 symbols, relatively contradiction, on the one hand indicates timeslot-level tune really Degree existing protocol can support that i.e. sTTI=7 and TTI=14 do not have substantially too big difference.Another aspect sTTI=7 Discussed jointly with sTTI=2 all the time, i.e., the two is suitable for use of identical DCI.So mode 4 be another kind can Energy.The reason of mode 3：1ms time delays are not reduced using existing legacy DCI, and the reduction of remaining time delay can use asynchronous UL The denominators such as HARQ.

Mode 5 and 6 is to consider three kinds of DCI, i.e., 1ms TTI time delays, which do not reduce, still uses existing legacy DCI, for Whether 1ms TTI time delays reduce using identical DCI and sTTI=7 symbols has separated two kinds of possible situations respectively with sTTI. But it is to discriminate between excessive DCI format and adds complexity for UE blind Detectings.

When 1ms TTI time delays reduce and the existing time delays of 1ms TTI all use identical DCI format, including it is following several Kind may mode：1. using existing DCI and without change.When still using PHICH to PUSCH feeding back ACKs/NACK, 1ms is performed Time delay is reduced and implicitly determined by TBS.2. directly add new bit field.It is probably new DCI format, or directly exists Revision increase bit field in format 0 or 4.UL HARQ process numbers, RV (during asynchronous HARQ) may be added in Format 0/4, Timing k instructions may be added in format 0 or 4 or 1A.Influence format 1A increases padding.Now add new bit field When, sTTI DCI can also be supported., can be to the bit field newly added when not reduced at this point for 1ms TTI time delays reserved.Or when there are k instructions, respective bit field can be defined respectively.3. current DCI bit fields reuse.When without using During PHICH, UL grant need to add UL HARQ process numbers, RV, when by implicitly according to TBS or display according to RRC configurations or When scrambling execution 1ms time delays according to different C-RNTI reduces, the bit field reinterpreted is used.

When 1ms TTI time delays, which reduce, uses identical DCI format with sTTI, including following several possible modes：1. work as When TTI length indication bit domains in DCI be present, then remaining bit field of different TTI length can separately design.It is in DCI During single-level DCI, mainly it is acted on the bit field in first sTTI or legacy PDCCH regions.It is in DCI During two-level DCI, the bit field is located in slow DCI, and during for TTI=1ms and/or TTI=7 symbols, Complete schedule information is included in slowDCI.2. when TTI length indication bit domains are not present in DCI, then different TTI grow Remaining bit field of degree needs Uniting, and now TTI length can be semi-statically configured by high-level signaling or be fixed value.To two-stage When TTI length bit fields are not present in DCI in Slow DCI, now resource allocation field is applied to all TTI length, and During for scheduling sTTI=2 or 7 or UL sTTI=4 symbols, follow-up unwanted bit field reserved or part are used for again Explain instruction fast DCI resources；During for scheduling TTI=14 or 7 symbol, institute's bit field in need is used.

Corresponding to the transmission method of above-mentioned Downlink Control Information, a kind of Downlink Control Information is additionally provided in the present embodiment Transmitting device, in base station, the device be used for realize above-described embodiment and preferred embodiment, carried out explanation Repeat no more.As used below, term " module " can realize the combination of the software and/or hardware of predetermined function.Although Device described by following examples is preferably realized with software, but hardware, or the realization of the combination of software and hardware And may and be contemplated.

Fig. 3 is a kind of structured flowchart of the transmitting device of Downlink Control Information according to embodiments of the present invention, such as Fig. 3 institutes Show, the device includes：

Carrier module 22, for passing through conventional physical down control channel (legacy PDCCH), enhancing physical down control At least one of channel (EPDCCH) processed, SPDCCH carry the descending control of the terminal UE for dispatching short transmission time interval sTTI Information DCI processed, the SPDCCH are the Physical Downlink Control Channel in sTTI；Sending module 24, it is connected with carrier module 22, uses Sent in the DCI for carrying carrier module 22 to terminal；Wherein, the Traffic Channel that the DCI is used to dispatch includes following At least one：Traffic Channel in only sTTI；The Traffic Channel in Traffic Channel or 1msTTI in sTTI；Business in sTTI Traffic Channel in channel and 1ms TTI.

Alternatively, described device can also include notification module, for notifying to use by high-level signaling RRC or SIB State one of two ways or predefined using one of above two mode.

Alternatively, described device can also include configuration module, for configuring described two by high-level signaling SIB or RRC First order DCI update cycle in level DCI.Which can apply in the case of fast DCI have full schedule information, When certain slow DCI demodulation mistakes, but still in the range of the update cycle, the slow DCI instructions before use, to reduce fast DCI demodulated complex degree.

As a kind of preferred embodiment, in the case where the SPDCCH is based on DMRS demodulation, described device can be with Including port selecting module, for being selected to use corresponding SPDSCH ports according to port using priciple.

Specifically, when the DMRS and this UE SPDSCH are shared, SPDSCH ports using priciple include it is following at least it One：

The DMRS of port identical with SPDCCH is used in RI=1；

RE positions identical port where the DMRS with SPDCCH is used in RI=2；

Alternatively, described device can also include scrambling module, for being scrambled to the SPDCCH.Wherein, it is described SPDCCH scrambling initial method is that each sTTI is independently scrambled in subframe or in radio frames, first sTTI wherein in subframe In or Legacy PDCCH regions in sPDCCH scrambling initialization meetc_initInitialized for scrambling Value, n_sFor timeslot number,For cell (Cell) mark (ID) number.

It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong Cross in the following manner realization, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or above-mentioned modules are with any The form of combination is located in different processors respectively.

In the present embodiment, the transmission method of another Downlink Control Information is additionally provided, Fig. 4 is implemented according to the present invention The flow chart of the transmission method of another Downlink Control Information of example, as shown in figure 4, this method comprises the following steps：

Step S302, receive by conventional physical down control channel legacy PDCCH, enhancing physical down control letter The descending control for being used to dispatch short transmission time interval (sTTI) terminal (UE) of at least one of road EPDCCH, SPDCCH carrying Information (DCI) processed, the SPDCCH are the Physical Downlink Control Channel in sTTI；

Step S304, the UE are scheduled using the DCI.

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

The present embodiment by above-mentioned steps, by the DCI of the UE for dispatching sTTI be carried on legacyPDCCH, EPDCCH, In at least one SPDCCH, UE is scheduled using the DCI, is solved and is lacked support in correlation technique in low time delay communication scenes The problem of Downlink Control Information of short TTI and its related service scheduling, give and support short TTI scheduling and its related difference The implementation of length TTI traffic schedulings, ensure time delay communication requirement.

B, the DCI for being used to dispatch sTTI UE are located at different search spaces from the DCI for dispatching 1ms PDSCH. It can be made a distinction by limiting the search space residing for the DCI for dispatching different business channel, such as be located at CSS or USS respectively, Respectively positioned at Legacy search spaces and the search space newly defined.Preferably, it can be used for only dispatching the business letter in sTTI Road；Dispatch the Traffic Channel in sTTI or the Traffic Channel in 1ms TTI；Dispatch in the Traffic Channel and 1msTTI in sTTI Traffic Channel.

Indicate SPDSCH transmission mode；

Indicate DL sTTI length (length) and/or UL sTTI length (length)；

Indicate sPDSCH and/or sPUSCH resource allocation informations；

Indicate PRB positions where used DMRS during SPDSCH demodulation；

Indicate DL sTTI length (length) and/or UL sTTI length (length)；

The DMRS of port identical with SPDCCH is used in RI=1；

RE positions identical port where the DMRS with SPDCCH is used in RI=2；

In PRB where being only located at SPDCCH；

In PRB where being located at least in SPDCCH；

Corresponding to the transmission method of above-mentioned another Downlink Control Information, additionally provide in the present embodiment another descending The transmitting device of control information, in UE, the device is used to realize above-described embodiment and preferred embodiment, has carried out What is illustrated repeats no more.

Fig. 5 is the structured flowchart of the transmitting device of another Downlink Control Information according to embodiments of the present invention, such as Fig. 5 institutes Show, the device includes：

Receiving module 42, for receiving by under conventional physical down control channel (legacy PDCCH), enhancing physics Under the UE for being used to dispatch short transmission time interval (sTTI) of at least one of row control channel (EPDCCH), SPDCCH carrying Row control information (DCI), the SPDCCH are the Physical Downlink Control Channel in sTTI；Scheduler module 44, for using reception The DCI that module 42 receives is scheduled；Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：Only Traffic Channel in sTTI；The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；Traffic Channel and 1ms in sTTI Traffic Channel in TTI.

Alternatively, described device can also include acquisition module, be used for being obtained by high-level signaling RRC or SIB State one of two ways or predefined using one of above two mode.

Alternatively, the acquisition module, can be also used for obtaining the two-stage by high-level signaling SIB or RRC configuration First order DCI update cycle in DCI.Which can apply in the case of fast DCI have full schedule information, when Certain slow DCI demodulates mistake, but still in the range of the update cycle, the slow DCI instructions before use, to reduce fast DCI demodulated complex degree.

The DMRS of port identical with SPDCCH is used in RI=1；

RE positions identical port where the DMRS with SPDCCH is used in RI=2；

In the present embodiment, the Transmission system of Downlink Control Information is additionally provided, under Fig. 6 is according to embodiments of the present invention The structured flowchart of the Transmission system of row control information, as shown in fig. 6, the device is located at the descending of base station including as shown in Figure 4 The transmitting device 30 of control information, include the transmitting device 40 of the Downlink Control Information positioned at UE as shown in Figure 5.

The transmission plan of the Downlink Control Information proposed by using the present embodiment, can solve to accord with comprising less OFDM Number short TTI in Downlink Control Information design problem, support that short TTI is dispatched and different length TTI traffic scheduling problems, is ensured Low time delay communication requirement.

Illustrated with reference to preferred embodiment, preferred embodiment below combines above-described embodiment and its is preferable to carry out Mode.

In preferred embodiment below, there is provided a kind of transmission plan of Downlink Control Information：Base station passes through Legacy At least one of PDCCH and SPDCCH carrying scheduling sTTI UE Downlink Control Information are simultaneously sent to terminal.

The Traffic Channel of the Downlink Control Information scheduling includes at least one of：

It is only used for dispatching Traffic Channel in sTTI；

For dispatching in sTTI Traffic Channel in Traffic Channel or 1ms TTI；

For dispatching in sTTI Traffic Channel in Traffic Channel and 1ms TTI.

Wherein, Legacy PDCCH be LTE system in Physical Downlink Control Channel, including PDCCH, EPDCCH, RPDCCH etc., SPDCCH represent the Physical Downlink Control Channel in sTTI, may be simply referred to as SPDCCH (Short PDCCH), similar , physical down Traffic Channel may be simply referred to as SPDSCH (Short PDSCH) in sTTI, and physical uplink Traffic Channel can in sTTI Referred to as SPUSCH (Short PUSCH).The sTTI is the TTI for being less than 1ms on the time, for applied to LTE system, Short TTI is made up of N number of OFDM symbol, comprising OFDM symbol number N be at least one of { 1,2,3,4,5,6,7 }.Wherein, If sTTI includes N number of OFDM symbol, SPDCCH takes X OFDM symbol in time domain, and the preferred value of X≤N, X is 1 or 2.And X OFDM symbol is located at preceding X OFDM symbol in sTTI N number of OFDM symbol.X values can be fixed or configured by base station.Its In, SPDCCH is located at part resource location in subframe or sTTI or OFDM symbol, part resource be subframe or sTTI or in one Or part PRB or REG resource in multiple OFDM symbols, or part resource is part PRB or REG resource in OFDM symbol；Enter One step, PRB can also polymerize and use by resource units on frequency domain, used or configured using N number of PRB as one group；Similar REG can also polymerize use.

Wherein, the Downlink Control Information includes Legacy DCI in LTE system, is the newly-designed sTTI of sTTI UE At least one of DCI.When the Downlink Control Information is only used for dispatching Traffic Channel in sTTI, Legacy PDCCH carryings Legacy DCI scheduling sTTI UE 1ms TTI Traffic Channels, sTTI DCI scheduling is carried by Legacy PDCCH or SPDCCH Traffic Channel in sTTI；When the Downlink Control Information is used to dispatch in sTTI Traffic Channel in Traffic Channel or 1ms TTI, by Traffic Channel in Traffic Channel or 1ms TTI in Legacy PDCCH or SPDCCH carrying sTTI DCI scheduling sTTI；Under described Row control information is used to dispatch in sTTI in Traffic Channel and 1ms TTI during Traffic Channel, is carried by Legacy PDCCH Legacy DCI scheduling sTTI UE 1ms TTI Traffic Channels, business in sTTI DCI scheduling sTTI is carried by SPDCCH and believed Road；

Further, when the DCI is used to dispatch in sTTI Traffic Channel in Traffic Channel or 1ms TTI, in one-level DCI or By sign bit field in the two-stage DCI first order, distinguish for dispatching in Traffic Channel or sTTI in 1ms TTI Traffic Channel.

Specifically, sTTI DCI include scheduling sTTI or 1ms TTI function.When using single-level DCI, Scheduling 1ms TTI or sTTI Traffic Channels are indicated by sTTI/TTI flag bit fields.Use sPDCCH carrying sTTI DCI And 1ms TTI and sTTI dynamic dispatchings are supported simultaneously.It is wherein optional, sTTI/TTI flag non-first sTTI in subframe In be useless, or sTTI/TTI flag other functions of giving instruction in non-first sTTI.When using two-level During DCI, first order DCI (also referred to as slow DCI) indicates that scheduling 1ms TTI or sTTI business are believed by sTTI/TTI flag Road, can be Legacy PDCCH or SPDCCH carrying for slow DCI.It is as shown in table 1 using sTTI/TTI flag instructions, Situation represented by wherein flag=0 and flag=1 can also exchange.Now only support to adjust in 1 subframe of same carrier wave PDSCH or SPDSCH situation is spent, detection complexity is low, and terminal processes are simple.It is each in the case of sTTI scheduling is indicated DL and/or UL schedule information can be included in the per subframe schedule informations that sTTI is extracted, such as described sTTI band Resource allocation (resource allocation refers to resource on frequency domain and indicated, preferably indicates which PRB resource taken in system bandwidth) can be DL STTI band resource allocations and/or UL sTTI band resource allocations, sTTI length can be DL sTTI length and/ Or (fast DCI resources refer to carrying fast DCI sPDCCH detections to the instruction of UL sTTI length, fast DCI resources Shi Suoxu parameters indicate) can be the instruction of DL fast DCI resources and/or the instruction of UL fast DCI resources.

Table 1sTTI/TTI flag are indicated

Or the DCI is when being used to dispatch in sTTI Traffic Channel in Traffic Channel or 1ms TTI, in one-level DCI or two By sign bit field in the level DCI first order, distinguish for dispatching in Traffic Channel or sTTI in 1ms TTI Traffic Channel.Now identification bit domain is not only 1bit instruction 1msTTI and sTTI, can also be that 2bit instructions are varigrained STTI, such as using 2bit instructions 1ms TTI, 2OFDM symbol sTTI, 7OFDM symbol sTTI, 4-3-4-3OFDM symbol sTTI (tables Show that 14 OFDM symbol is divided into 4 sTTI in Normal CP in subframe, respectively with 4-3-4-3 OFDM symbol, when During Extended CP, this structure is 3-3-3-3OFDM symbols).

B, the DCI for being used to dispatch sTTI UE are located at different search spaces from the DCI for dispatching 1ms PDSCH. It can be made a distinction by limiting the search space residing for the DCI for dispatching different business channel, such as be located at CSS or USS respectively, Respectively positioned at Legacy search spaces and the search space newly defined.Preferably, it can be used for only dispatching the business letter in sTTI Road；Dispatch the Traffic Channel in sTTI or the Traffic Channel in 1ms TTI；Dispatch in the Traffic Channel and 1ms TTI in sTTI Traffic Channel.

C, the UE for being used to dispatch sTTI is distinguished by the sign in one-level DCI or two-stage DCI first order DCI DCI be for dispatching Traffic Channel in 1ms TTI or for dispatching the Traffic Channel in sTTI.This method preferably can be with For dispatching situation during Traffic Channel in Traffic Channel in sTTI or 1ms TTI.

Further, the Downlink Control Information is one-level DCI or two-stage DCI, and the Traffic Channel of wherein two-stage DCI instructions is adjusted Degree information includes at least one of：

The first order and the second level collectively form complete schedule information in two-stage DCI；

The second level includes full schedule information in two-stage DCI, and now the first order alternatively includes but is not limited to below at least One of：Partial scheduling information, second level DCI configured information, sTTI frequency domain, downlink (DL) sTTI length, Up-link (UL) sTTI length, the frequency domain of DL sTTI bandwidth (band), UL sTTI band frequency domain；

Specifically, when Downlink Control Information is one-level DCI, now each DCI can independently dispatch corresponding business letter Road, there is complete schedule information, in the case of configuring the detection sTTI moment in no base station, give tacit consent in each sTTI and be required for Detect the DCI.When Downlink Control Information is two-stage DCI, two-stage DCI instruction Traffic Channel schedule informations are first in two-stage DCI When level and the second level collectively form complete schedule information, the information that terminal needs to obtain in two-stage DCI can obtain business The schedule information of channel.When Downlink Control Information is two-stage DCI, two-stage DCI instruction Traffic Channel schedule informations are in two-stage DCI When the second level includes full schedule information, as long as the information that terminal needs to obtain in the DCI of the second level can just obtain Traffic Channel Schedule information, now the information in first order DCI for auxiliary the second level DCI detection information or other physical layers dynamic Configuration information.Wherein second level DCI is also referred to as fast DCI.

Further, at least one following information is included in the first order DCI：

Required parameter during carrying second level DCI SPDCCH detections is indicated, the second level DCI includes scheduling sPDSCH And/or sPUSCH second level DCI, wherein the parameter include polymerization grade, Candidate Set quantity, search space frequency domain position, DMRS scrambling initial values parameter that search space time-domain position, SPDCCH scrambling initial values parameter, SPDCCH are used, SPDCCH are passed At least one DMRS port that defeated pattern, SPDCCH demodulation use；Specifically, instruction polymerization grade, which is SPDCCH, supports all gather Partially polymerized grade in conjunction grade, preferably a kind.The Candidate Set quantity of instruction is all Candidate Sets corresponding to each polymerization grade In part Candidate Set, preferably a kind.The search space frequency domain position of instruction is the part RBG in system bandwidth or sTTI band Or PRB or REG positions.The search space time-domain position of instruction be subframe in or sTTI in part OFDM symbol position.Instruction SPDCCH scrambling initial values parameter is UE-specific'sOr group-specificFor publicly-owned Message uses cell ID without instruction.Indicate that the DMRS scrambling initial values parameter that SPDCCH is used is UE-specific'sOr group-specificFor publicly-owned message cell ID is used without instruction.Indicate that SPDCCH is passed Defeated pattern is localized transmission, distributed transmission, sends at least one of diversity mode transmission.Indicate what SPDCCH demodulation used DMRS port, i.e. eNB directly indicate that the DMRS port number used during second level DCI demodulation, or instruction make by first order DCI Port number combinations.

DMRS port or reserved RE when indicating to carry second level DCI SPDCCH and/or SPDSCH rate-matcheds, wherein Reserved RE preferably can be RE corresponding to all DMRS ports, or wherein take RE corresponding to identical RE port；Specifically, When SPDCCH and SPDSCH uses DMRS in the region with overlapping frequency domain position, the first order DCI instruction carryings second level DMRS port during DCI SPDCCH and/or SPDSCH rate-matcheds, with cause carry second level DCI SPDCCH and/or Demodulation that SPDSCH can know that it goes without doing when frequency domain overlapping region medium-rate matches but existing DMRS pilot tones so that eNB Understand with terminal in rate-matched consistent.

Indicate that carrying second level DCI SPDCCH and/or SPDSCH demodulation uses pilot tone CRS and/or DMRS；Specifically , it is CRS or DMRS that the first order DCI instruction carryings second level DCI SPDCCH and/or SPDSCH, which are demodulated using pilot tone, or Use CRS and DMRS simultaneously.

Indicate SPDSCH transmission mode；Specifically, first order DCI indicates the SPDSCH transmission modes in the subframe.

Indicate that the carrying second level DCI SPDCCH and/or SPDSCH are based on whether using DMRS when CRS is demodulated；Specifically, First order DCI instruction carryings second level DCI SPDCCH and/or SPDSCH is based on whether using DMRS when CRS is demodulated.

Indicate that the carrying second level DCI SPDCCH and/or SPDSCH are based on whether using CRS when DMRS is demodulated；Specifically, First order DCI instruction carryings second level DCI SPDCCH and/or SPDSCH is based on whether using CRS when DMRS is demodulated.

Indicate PRB positions where used DMRS during carrying second level DCI SPDCCH and/or SPDSCH demodulation.Tool Body, PRB positions where used DMRS when the first order DCI instruction carryings second level DCI SPDCCH and/or SPDSCH are demodulated Put.

Indicating downlink link DL sTTI bandwidth frequency domain positions and/or up-link UL sTTI bandwidth frequency domain positions；

Indicate DL sTTI length (length) and/or UL sTTI length (length)；

For the instruction referred to above arrived, when first order DCI is non UE-specific signalings, indicate to be used for non UE-specific SPDCCH and/or SPDSCH relevant parameters.When first order DCI is UE-specific signalings, indicate to be used for UE-specific SPDCCH and/or SPDSCH relevant parameters.

Further, during the SPDCCH detections of the first order DCI instructions carrying second level DCI during required parameter, in RRC Or on the parameter basis of SIB configurations, indicate the subset of the parameter of the RRC or SIB configurations.The subset can include parameter species Subset, and/or the subset of parameter value scope.Specifically, required parameter is still by height during second level DCI SPDCCH detections Layer signaling (SIB or RRC signaling) configuration, wherein the parameter includes polymerization grade, Candidate Set quantity, search space frequency domain position Put, the DMRS scrambling initial values parameter that search space time-domain position, SPDCCH scrambling initial values parameter, SPDCCH are used, At least one DMRS port that SPDCCH transmission modes, SPDCCH demodulation use, first order DCI refers in high-level signaling SIB or RRC On the basis of showing parameter, parameter reduce or specific is indicated, that is, indicates the subset of high-level signaling SIB or RRC instruction parameter, institute Stating subset includes the subset of parameter species, and/or the subset of parameter value scope.Such as 1 is indicated in the aggregation level set of configuration Kind or a few, in the Candidate Set set of configuration indicate a kind a few, refer in the search space frequency domain position of configuration Show reduction or specific frequency domain position, in the search space time-domain position of configuration instruction reduction or specific time domain position Put.

Further, at least one following information is included in the second level DCI：

When the two-stage DCI collectively forms full schedule information, comprising resource allocation and in the first order in the DCI of the second level Indicated in DCI on the basis of resource allocation；Specifically, the first order DCI instruction this subframe in sTTI frequency domain position scopes R base On plinth, second level DCI indicates to support to take in the resource R that first order DCI is distributed all more than or equal to 1 UE within the range Or part resource.Such as indicate to take { 1,1/2,1/4 } R resource using 3bits, i.e. 7 kinds of possibility, wherein 1/2R and 1/4R can To concentrate occupancy or at equal intervals discrete occupancy resource.

Indicate sPDSCH and/or sPUSCH resource allocation informations；

Indicate PRB positions where used DMRS during SPDSCH demodulation.

Indicate DMRS port during SPDSCH rate-matcheds；Specifically, when SPDCCH and SPDSCH is with overlapping frequency domain When DMRS is used in the region of position, second level DCI indicates DMRS port during SPDSCH rate-matcheds, to cause SPDSCH to exist The demodulation that can know that it goes without doing during the matching of frequency domain overlapping region medium-rate but existing DMRS pilot tones so that eNB and terminal exist Understand during rate-matched consistent.

Indicate PRB positions where used DMRS during SPDSCH demodulation.Specifically, second level DCI instruction SPDSCH solutions PRB positions where DMRS used in timing.

Indicating downlink link DL sTTI bandwidth frequency domain positions and/or up-link UL sTTI bandwidth frequency domain positions.

Indicate DL sTTI length and/or UL sTTI length.

Indicate DL sTTI bindings transmission number and/or UL sTTI binding transmission numbers.

Further, first order DCI in the two-stage DCI (also referred to as slow DCI) update cycle is by high-level signaling (SIB Or RRC) configuration.Specifically, when second level DCI (also referred to as fast DCI) has a case that full schedule information, when certain Slow DCI demodulate mistake, but still in the range of the update cycle, the slow DCI instructions before use, to reduce fast DCI solutions Adjust complexity.Preferably, in update cycle 1ms, 4ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms at least it One.

Further, when the SPDCCH is based on DMRS demodulation：

The DMRS of port identical with SPDCCH is used in RI=1；

RE positions identical port where the DMRS with SPDCCH is used in RI=2；

Specifically, assume SPDCCH using DMRS port similar to EPDCCH.

Fig. 7 is SPDCCH according to the preferred embodiment of the invention only in sTTI in first OFDM symbol in the sPRB of part The schematic diagram of resource is taken, as shown in fig. 7, sPDCCH takes money only in sTTI in the sPRB of part in first OFDM symbol Source.Assuming that being taken in PRB#48-49,36-37 by sPDCCH1, the sPDSCH1 of scheduling is located at PRB#44-49,32-37.

Fig. 8 is that the DMRS in PRB where SPDCCH according to the preferred embodiment of the invention needs to show with what SPDSCH was shared It is intended to, Fig. 9 is signals of the part PRB where SPDSCH according to the preferred embodiment of the invention without sharing DMRS with SPDCCH Figure, now, the DMRS in PRB#48-49,36-37 as shown in Figure 8 may need to share with sPDSCH (uses CRS in sPDSCH Or sPDSCH using during the DMRS exclusively enjoyed without sharing), the DMRS in PRB#44-47,32-35 as shown in Figure 9 is (if sPDSCH Use DMRS) without being shared with sPDCCH.

Sharing means that two channels are needed in a manner of CDM using the DMRS on identical RE positions.

If do not shared, sPDCCH and sPDSCH each uses independent DMRS RE, can cause pilot-frequency expense in sTTI It is bigger.

When sPDSCH uses RI=1, identical port is used；

During sPDCCH centralizations such as port7, sPDSCH also use centralized port7,

Port 7/9 when sPDCCH uses distributed, sPDSCH also use port7/9；

--- also increase space diversity mode equivalent to PDSCH.

When sPDSCH uses RI=2：

When sPDCCH using it is centralized when such as port7, then sPDSCH wherein one layer of port7s identical with sPDCCH, another layer The port used suggests selecting the port8 of identical RE positions；

When sPDCCH using it is distributed when such as port7/9, then two layers of sPDSCH use port7 and port9 respectively；

--- limited equivalent to the second layer port to PDSCH using introducing.Principle causes as far as possible to consider expense first SPDSCH will not be increased using DMRS expenses on the basis of the DMRS expenses that sPDCCH is used.

When sPDSCH uses RI>When 2：

When sPDCCH using it is centralized when such as port7, then sPDSCH wherein one layer of port7s identical with sPDCCH, another layer The port that uses suggests port8,11,13 of the identical RE positions of prioritizing selection, the port9 of reselection difference RE positions, 10,12, 14；

When sPDCCH using it is distributed when such as port7/9, then sPDSCH port can flexibly select.

--- similar to RI=2, work as RI>Port use when 2 to PDSCH may introduce limitation.Principle is to consider first Expense, as far as possible in the case where meeting RI requirements so that sPDSCH will not be in the DMRS expenses that sPDCCH is used using DMRS expenses On the basis of increase, when can not meet RI requirement when selection increase DMRS expenses resource location.

Preferential RE positions identical port where using the DMRS with SPDCCH, next is used where the DMRS with SPDCCH The different port in RE positions；

Specifically, if SPDCCH uses DMRS port 7, SPDSCH preferentially uses DMRS port 8,11,13, and suboptimum uses DMRS port 9,10,12,14.

Further, the DMRS frequency domain positions that the SPDCCH and SPDSCH is shared include with lower section when being located at part PRB At least one formula：

In PRB where being only located at SPDCCH；For example, PRB where only self-contained SPDCCH configures the DMRS of the UE, it is now right In SPDSCH demodulation performance possible deviation.Wherein, self-contained SPDCCH is distributed preferably in the PRB that sPDSCH takes takes Resource so that DMRS tries one's best discrete on frequency domain.

In PRB where being located at least in SPDCCH；For example, except PRB where self-contained SPDCCH configure the DMRS of the UE with Outside, the DMRS of the UE is also configured in PRB where other SPDSCH in the PRB of part.

In the PRB chosen in the PRB resources equal intervals of SPDCCH or SPDSCH occupancy.Such as：In max { SPDCCH takes PRB resources, and SPDSCH takes PRB resources } equal intervals take.X PRB is spaced, x is that fixed value or eNB lead to Cross the value of high-level signaling or physical layer signaling configuration.

PRB positions where above-mentioned DMRS can also be indicated by high-level signaling or physical layer signaling.

Further, the scrambling initial method of the SPDCCH is to be scrambled in subframe in first sTTI with Legacy PDCCH It is identical, it is different from Legacy PDCCH scramblings in follow-up sTTI in subframe.

Specifically, base station side send SPDCCH when, initial value determination mode used in scramble sequence include it is following at least One of.It should be noted that following manner (1), (2), (3) are only as 2 OFDM symbols and in normal CP using sTTI , sTTI serial numbers 0 to 6 in subframe.It is also applied for the short TTI in other length.If sTTI is 7 OFDM symbols, then subframe Middle sTTI serial numbers 0 to 1.If sTTI is 4-3-4-3 OFDM symbol, then sTTI serial numbers 0 to 3 in subframe.In below equation C_initTo scramble initialization value, n_sFor timeslot number,For cell (Cell) mark (ID) number.

(1)n_TTI=0,1 ..., 6.

(2)n_TTI=0,1 ..., 6.

(3)And during the b (i) after channel coding and c (i) scramblings, use the c sequences of interception.I.e.It is changed toWherein A and sTTI length, system bandwidth, modulation order At least one number, sTTI band width etc. are relevant, such as sPDCCH, sTTI=2OFDM symbols, preferably A=2400 or 4800。

The scrambling mode in the case where can accurately learn sTTI index, based on sTTI scrambling relative to based on Subframe scrambling randomization effects are good, while and can enough ensures the SPDCCH scramblings in subframe in LegacyPDCCH regions Do not conflict with PDCCH scramblings, it is mutually compatible after realization.

Further, if SPDCCH is UE-specific, now replaced using C-RNTI or Group-RNTIGeneration Scrambling initial value, or the UE-specific of RRC configurations parameter value

Such scheme is further elaborated below by specific embodiment.

Preferred embodiment 1

(this preferred embodiment 1 realizes scheduling PDSCH or SPDSCH by two-stage DCI)

Base station SPDSCH is dispatched by two-stage DCI.The optional frequency domain comprising instruction sTTI band accounts in first order DCI It is optional to include instruction sTTI length/pattern with position.First order DCI can be realized to sTTI UE flexible dispatchings simultaneously 1ms PDSCH and sTTI SPDSCH.Instruction 1ms TTI and sTTI scheduling identification instruction are preferably comprised in first order DCI.Its Middle first order DCI is located in Legacy PDCCH regions, or in first sTTI, is held by Legacy PDCCH or SPDCCH Carry.

Wherein first order DCI (slow DCI) content is by taking table 1 as an example, by taking dispatching downlink Traffic Channel as an example.

Table 1Format X

If SPDSCH in base station scheduling sTTI, carrying second level DCI (fast DCI) SPDCCH is sent in sTTI. Wherein, fast DCI contents are by taking table 2 as an example, by taking dispatching downlink Traffic Channel as an example.Wherein resource allocation 3bit instructions occupancy 1, 1/2nd, 1/4 } R resource, i.e. 7 kinds of possibility, wherein R/2 and R/4 can concentrate occupancy or at equal intervals discrete occupancy resource.For example, R is divided into 16 parts, then corresponding to R/2 2 kinds may be one group, one group of odd-numbered of even-numbered in 16 parts；R/4 is corresponding 4 kinds may be to number one group of { 0,4,8,12 } in 16 parts, one group of numbering { 1,5,9,13 }, numbering { 2,6,10,14 } One group, one group of numbering { 3,7,11,15 }.

Table 2Format Y

Terminal demodulates slow DCI first in Legacy PDCCH regions, works as demodulation when receiving downlink service data When being judged as dispatching 1ms PDSCH according to flag afterwards, then detection fast DCI are no longer received, detection is received according to schedule information PDSCH in frame.When being judged as dispatching sTTI SPDSCH according to flag after demodulation, continue to detect in sTTI and held in SPDCCH The fast DCI of load.

According to the information that SPDSCH is dispatched in demodulation fast DCI, SPDSCH is demodulated in sTTI.

By the scheme of the present embodiment, by two-stage DCI first order DCI increases distinguish scheduling 1ms TTI still STTI flag marks so that sTTI terminals only perform a kind of Traffic Channel demodulation of TTI length in same subframe, without The PDSCH of different TTI length is demodulated simultaneously, reduces terminal detection process complexity.Ensure delay requirement.

Preferred embodiment 2

(two-stage DCI, either dependent or independent use, for indicating fast DCI, transmission mould are used in this preferred embodiment 2 Formula, pilot tone etc..)

Base station SPDSCH is dispatched by two-stage DCI.The optional frequency domain comprising instruction sTTI band accounts in first order DCI It is optional comprising instruction sTTI length/pattern with position, SPDSCH transmission modes optionally are included, are optionally included The demodulation pilot tone that SPDCCH and/or SPDSCH are used, PRB positions where the optional DMRS used comprising SPDCCH and/or SPDSCH Put, it is optional to include parameter needed for instruction fast DCI coherent detections.Wherein first order DCI is located at Legacy PDCCH regions In, or in first sTTI, carried by Legacy PDCCH or SPDCCH.

Wherein first order DCI (slow DCI) content is by taking table 3 as an example, by taking dispatching downlink Traffic Channel as an example.Wherein SPDSCH transmission instructions, can be indicated based on existing LTE transmission pattern (1-10), or used based on sTTI UE Indicated in transmission mode set, the transmission mode set that the sTTIUE is used can only include the existing transmission of LTE Pattern, or also it is included as the transmission mode that sTTI UE are newly defined.Demodulation pilot tone instruction represents to be based on cell reference signals CRS Or it is based on UE demodulated reference signals DMRS.PRB positions only use when DMRS is not located at each PRB where DMRS, that is, exist When DMRS be present in the PRB of part, and use when not being fixed position, indicate in resource allocation region, PRB positions where DMRS Put, the part PRB such as chosen according to x at equal intervals (individual PRB) configures DMRS.The instruction of Fast DCI detection parameters is specifically comprising polymerization Grade, Candidate Set quantity, search space frequency domain position, search space time-domain position, SPDCCH scrambling initial values parameter, SPDCCH At least one DMRS port that the DMRS scrambling initial values parameter that uses, SPDCCH transmission modes, SPDCCH demodulation use, or The subset (such as reduced value or occurrence) of indicating section parameter on the basis of high-level signaling SIB or RRC configuration.

The Format X of table 3

SPDSCH in base station scheduling sTTI, carrying second level DCI (fast DCI) SPDCCH is sent in sTTI.Its In, fast DCI contents are by taking table 4 as an example, by taking dispatching downlink Traffic Channel as an example.When the first order indicates sTTI resource allocations, The further resource allocation of second level DCI instructions, such as 3bit instruction occupancy { 1,1/2,1/4 } R resource, i.e. 7 kinds of possibility, its Middle R/2 and R/4 can concentrate occupancy or at equal intervals discrete occupancy resource.When DCI specific independent sPDSCH in the second level dispatch letter During breath, then SPDSCH resource allocation information is directly indicated in the second level.

The Format Y of table 4

Terminal demodulates slow DCI first in Legacy PDCCH regions, works as two-stage when receiving downlink service data When DCI collectively forms full schedule information, on the basis of first order DCI is demodulated, demodulation second level DCI obtains complete terminal SPDSCH demodulation instruction parameter.When second level DCI includes complete SPDSCH schedule informations in two-stage DCI, is demodulated One-level DCI can make it that demodulation second level DCI is quicker, reduce detection complexity, and otherwise second level DCI detections are not solving Detect to obtain with higher detection complexity when recalling first order DCI.Believe when second level DCI can be dispatched with independent bearing SPDSCH Breath, first order DCI can not be referred to as DCI, that is, be exactly a physical layer signaling, by the detection complexity for indicating reduction DCI.

By the scheme of the present embodiment, pass through the first order DCI increases instruction second level DCI coherent detections in two-stage DCI Information so that sTTI terminals obtain schedule information when detecting two-stage DCI with relatively low detection complexity.By in two-stage DCI Middle first order DCI increases instruction SPDCCH and/or SPDSCH transmission mode, demodulate the information such as pilot tone so that sTTI terminal transmissions The renewal become based on sub-frame level is flexible.Ensure delay requirement.

Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation The method of example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but a lot In the case of the former be more preferably embodiment.Based on such understanding, technical scheme is substantially in other words to existing The part that technology contributes can be embodied in the form of software product, and the computer software product is stored in a storage In medium (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal equipment (can be mobile phone, calculate Machine, server, or network equipment etc.) perform method described in each embodiment of the present invention.

Embodiment 4

Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can The program code for performing following steps to be arranged to storage to be used for：

Step S102, carried by least one of legacy PDCCH, EPDCCH, SPDCCH for when dispatching short transmission Between be spaced (sTTI) terminal (UE) Downlink Control Information (DCI), legacy PDCCH, EPDCCH be LTE system in Legacy PDCCH, EPDCCH, the SPDCCH be sTTI in Physical Downlink Control Channel；

Step S104, the DCI of carrying is sent to terminal.

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

Alternatively, storage medium is also configured to the program code that storage is used to perform following steps：

Step S302, receive short for dispatching by least one of legacy PDCCH, EPDCCH, SPDCCH carrying The Downlink Control Information (DCI) of the terminal (UE) of transmission time interval (sTTI), the legacy PDCCH, EPDCCH LTE Legacy PDCCH, EPDCCH in system, the SPDCCH are the Physical Downlink Control Channel in sTTI；

Step S304, the DCI of carrying is sent to terminal.

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.

Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. is various can be with the medium of store program codes.

Alternatively, the specific example in the present embodiment may be referred to described in above-described embodiment and optional embodiment Example, the present embodiment will not be repeated here.

Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims

A kind of 1. transmission method of Downlink Control Information, it is characterised in that including：

By in conventional physical down control channel legacy PDCCH, enhancing Physical Downlink Control Channel EPDCCH, SPDCCH At least one carry the Downlink Control Information DCI, the SPDCCH of the terminal UE for dispatching short transmission time interval sTTI and be Physical Downlink Control Channel in sTTI；

The DCI of carrying is sent to terminal；

Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.
2. according to the method for claim 1, it is characterised in that when the DCI is used for scheduling traffic channel, including it is following At least one mode：

The size for dispatching sTTI UE DCI is identical with the DCI sizes for dispatching 1ms PDSCH, and passes through RNTI makes a distinction, including the RNTI for making a distinction by different types of RNTI different values or passing through same type Different values make a distinction；

The DCI for being used to dispatch sTTI UE is located at different search spaces from the DCI for dispatching 1ms PDSCH；

The DCI for being used to dispatch sTTI UE is distinguished by the sign in one-level DCI or two-stage DCI first order DCI It is for dispatching Traffic Channel in 1ms TTI or for dispatching the Traffic Channel in sTTI.
3. according to the method for claim 2, it is characterised in that the message package of the Traffic Channel carrying in the 1ms TTI Include at least one of：

UE unicast messages, either cell broadcast messages or one group of UE public message, or cell-level or one group of UE system Change message informing information.
4. according to the method for claim 1, it is characterised in that when the Downlink Control Information is two-stage DCI, by following At least one mode indicate the schedule information of Traffic Channel：

The first order and the second level in two-stage DCI collectively form complete schedule information；

The second level in two-stage DCI includes complete schedule information.
5. according to the method for claim 4, it is characterised in that also include：

By eNB by high-level signaling SIB or RRC notify using one of described mode or it is predefined using the mode its One of.
6. according to the method for claim 4, it is characterised in that following information is included in the first order DCI of the two-stage DCI At least one：

The information of required parameter during carrying second level DCI SPDCCH detections is indicated, the second level DCI includes scheduling sPDSCH And/or sPUSCH second level DCI；

The information of DMRS port or reserved RE when indicating to carry second level DCI SPDCCH and/or SPDSCH rate-matcheds；

Indicate that carrying second level DCI SPDCCH and/or SPDSCH demodulation uses pilot tone CRS and/or DMRS information；

Indicate the information of SPDSCH transmission mode；

Whether instruction carrying second level DCI SPDCCH and/or SPDSCH uses DMRS information when being demodulated based on CRS；

Whether instruction carrying second level DCI SPDCCH and/or SPDSCH uses CRS information when being demodulated based on DMRS；

Indicate the information of PRB positions where used DMRS during carrying second level DCI SPDCCH and/or SPDSCH demodulation；

The information of indicating downlink link DL sTTI bandwidth frequency domain positions and/or up-link UL sTTI bandwidth frequency domain positions；

Indicate the information of DL sTTI length and/or UL sTTI length；

Indicate the information of DL sTTI bindings transmission number and/or UL sTTI binding transmission numbers.
7. according to the method for claim 6, it is characterised in that required during the SPDCCH detections of the carrying second level DCI Parameter includes at least one of：

Polymerization grade, Candidate Set quantity, search space frequency domain position, search space time-domain position, SPDCCH scrambling parameters, The DMRS port that DMRS scrambling parameters that SPDCCH is used, SPDCCH transmission modes, SPDCCH demodulation use.
8. according to the method for claim 6, it is characterised in that include instruction in the first order DCI of the two-stage DCI and carry During the second level DCI SPDCCH detections during information of required parameter, parameter basis of the first order DCI in RRC or SIB configurations On, the subset of the parameter of the RRC or SIB configuration is indicated, the subset includes the subset of parameter species, and/or parameter value The subset of scope.
9. according to the method for claim 4, it is characterised in that following information is included in the second level DCI of the two-stage DCI At least one：

When the two-stage DCI collectively forms full schedule information, in the second level DCI comprising resource allocation information and Indicated on the basis of resource allocation in first order DCI；

When the second level in the two-stage DCI includes complete schedule information, comprising resource allocation in the second level DCI Information；

Indicate sPDSCH and/or sPUSCH resource allocation informations；

The information of DMRS port or reserved RE during instruction SPDSCH rate-matcheds；

Indicate the information of PRB positions where used DMRS during SPDSCH demodulation；

Indicate the information of DL sTTI length and/or UL sTTI length；

Indicate the information of DL sTTI bindings transmission number and/or UL sTTI binding transmission numbers.
10. according to the method for claim 4, it is characterised in that the update cycle of the first order DCI in the two-stage DCI Configured by high-level signaling SIB or RRC.
11. according to the method for claim 1, it is characterised in that in the case where the SPDCCH is based on DMRS demodulation, institute Stating method also includes：

When the DMRS and UE SPDSCH is shared, the using priciple of SPDSCH ports includes at least one of：

The DMRS of port identical with SPDCCH is used in RI=1；RE positions where the DMRS with SPDCCH are used in RI=2 Identical port；In RI>When 2 preferentially using and SPDCCH DMRS where RE positions identical port, secondly use with The different port in RE positions where SPDCCH DMRS；SPDSCH ports are indicated by DCI with reference to sPDCCH transmission means；

When the DMRS and non-UE SPDSCH is shared, SPDSCH ports using priciple includes at least one of：

Preferential RE positions identical port where using the DMRS with SPDCCH, RE positions where secondly using the DMRS with SPDCCH Put different ports.
12. according to the method for claim 11, it is characterised in that the DMRS resource locations are according to sPDCCH and sPDSCH Whether share DMRS and use different occupancy modes.
13. according to the method for claim 11, it is characterised in that in the DMRS frequency domains that the SPDCCH and SPDSCH is shared When position is located at part PRB, the DMRS frequency domain positions that the SPDCCH and SPDSCH is shared include at least one of：

In PRB where being only located at SPDCCH；

In PRB where being located at least in SPDCCH；

In the PRB chosen in the PRB resources equal intervals of SPDCCH or SPDSCH occupancy.
14. according to the method for claim 1, it is characterised in that the scrambling initial method of the SPDCCH includes：

The scrambling initial method of the SPDCCH is first wherein in subframe for each sTTI is independently scrambled in subframe or in radio frames SPDCCH scrambling initialization in individual sTTI or in Legacy PDCCH regions meetsc_initFor scrambling Initialization value, n_sFor timeslot number,For Cell Identity CI.
15. according to the method for claim 1, it is characterised in that the business letter in the DCI is used to dispatch 1ms TTI During road, scheduling or the 1ms TTI Traffic Channels that do not reduce of processing delay of the 1ms TTI Traffic Channels that processing delay reduces are supported Scheduling, scheduling mode includes at least one of：

1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays, and the content in by DCI implies and determined When being less than default TBS threshold values for TBS value, performing 1ms TTI time delays reduces, and otherwise performing 1ms TTI time delays does not reduce；

1ms TTI time delays reduce not to be reduced using unified DCI with 1ms TTI time delays, and is shown and referred to by individual bit domain in DCI Show whether perform the reduction of 1ms TTI time delays；

1ms TTI time delays, which reduce not reduce with 1ms TTI time delays, uses respective DCI format.
16. according to the method for claim 15, it is characterised in that 1ms TTI Traffic Channels are being dispatched by the DCI When, in addition to：Whether the reduction of 1ms TTI time delays is performed by high-level signaling SIB or RRC configuration.
17. according to the method for claim 15, it is characterised in that when the 1ms TTI processing delay reduces, upstream data Scheduling delay or downlink data feedback delay k meet 0<k<4 and be integer, and k value mode includes at least one of：

ENB and UE sides use identical fixed k, or eNB and UE sides to use different fixed ks respectively；Downlink and uplink makes Different fixed ks is used respectively with identical fixed k, or downlink and uplink；

Identical k values are notified to eNB and UE sides by DCI or SIB or RRC, or by DCI or SIB or RRC to eNB and UE sides Notify different k values；Identical k values are notified to downlink and uplink by DCI or SIB or RRC, or pass through DCI or SIB or RRC Different k values are notified downlink and uplink.
18. according to the method for claim 1, it is characterised in that the DCI be used for dispatch 1ms TTI time delays reduce or During sTTI reverse link traffic channel, indicate that ascending HARQ course number and/or redundancy versions RV include at least one in the following manner：

Fixed bit domain when not reduced using 1ms TTI time delays in DCI is indicated after being reinterpreted；

Indicated by individual bit domain in DCI；

CRC implicit indications are scrambled by different RNTI values.
19. according to the method for claim 1, it is characterised in that any one in the DCI is single-stage DCI or two-stage DCI During level DCI, indicate that untapped sPDCCH resource modes include at least one in the following manner：

When only including dispatching the sPDCCH of the sPDSCH in sPDSCH frequency domains or when only 1 in search space During sPDCCH, giving tacit consent to other resources in the sPDSCH frequency domains in addition to the sPDCCH allows to use, or in DCI Whether surplus resources allow to use in search space where indicating the sPDCCH by 1bit；

When there are multiple sPDCCH in search space, untapped Candidate Set is indicated when Candidate Set takes the search space； Control channel unit indicates untapped control channel unit when taking the search space；Taken in resource unit group or resource block Untapped resource unit group or resource block are indicated during the search space；Indicate not make when resource unit takes the search space Resource unit.
20. according to the method for claim 19, it is characterised in that indicating range corresponding to the instruction include it is following at least One of：

The untapped resources of sPDCCH are indicated in sPDSCH frequency domains；

The untapped resources of sPDCCH are indicated in sTTI band frequency domains；

The untapped resources of sPDCCH are indicated in search space SS where sPDCCH；

The resource that sPDCCH is not used is indicated in all SS or sTTI band frequency domains.
21. according to the method for claim 1, it is characterised in that the Traffic Channel in the DCI dispatches sTTI, and sTTI When length is unknown, detecting DCI mode includes at least one of：

Blind check is attempted respectively according to sPDCCH test positions different corresponding to different sTTI length；Corresponding to different sTTI length SPDCCH test positions are identical but tasted respectively with different rates matching way according to respective pilot tone pattern in different sTTI length Examination demodulation；

SPDCCH test positions corresponding to different sTTI length it is identical and according in sPDCCH regions same location pilot tone with Same rate-matched mode is attempted to demodulate.
22. according to the method for claim 1, it is characterised in that support to dispatch different TTI length and support in the DCI During the Traffic Channel whether time delay reduces, the occupation mode of the DCI comprises at least one below：

The TTI=2 OFDM symbol, TTI=1 time slot, the reduction of 1ms TTI time delays and 1ms TTI time delays, which do not reduce, to be made With identical DCI format；

1ms TTI time delays are reduced and 1ms TTI time delays are not reduced using a kind of DCI format, in TTI=2 OFDM symbol and TTI =1 time slot uses another DCI format or two-stage DCI；

1ms TTI time delays are not reduced using a kind of DCI format, when TTI=2 OFDM symbol, TTI=1 time slot and 1ms TTI Prolong reduction and use another DCI format or two-stage DCI；

1ms TTI time delays reduce, 1ms TTI time delays do not reduce and TTI=1 time slot uses a kind of DCI format, and TTI=2 is individual OFDM symbol uses another DCI format or two-stage DCI；

1ms TTI time delays are not reduced using a kind of DCI format, and 1ms TTI time delays, which reduce, uses another DCI format, TTI=2 Another DCI format or two-stage DCI are used when individual OFDM symbol and TTI=1 time slot；

1ms TTI time delays are not reduced using a kind of DCI format, and 1ms TTI time delays reduce and TTI=1 time slot uses another kind DCI format, TTI=2 OFDM symbol use another DCI format or two-stage DCI.
A kind of 23. transmission method of Downlink Control Information, it is characterised in that including：

Receive by conventional physical down control channel legacy PDCCH, enhancing Physical Downlink Control Channel EPDCCH, The Downlink Control Information DCI for being used to dispatch short transmission time interval sTTI terminal UE of at least one of SPDCCH carryings, institute It is the Physical Downlink Control Channel in sTTI to state SPDCCH；

The UE is scheduled using the DCI；

Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.
24. according to the method for claim 23, it is characterised in that when the DCI is used for scheduling traffic channel, including with At least one under type：

The size for dispatching sTTI UE DCI is identical with the DCI sizes for dispatching 1ms PDSCH, and passes through RNTI makes a distinction, including the RNTI for making a distinction by different types of RNTI different values or passing through same type Different values make a distinction；

The DCI for being used to dispatch sTTI UE is located at different search spaces from the DCI for dispatching 1ms PDSCH；

The DCI for being used to dispatch sTTI UE is distinguished by the sign in one-level DCI or two-stage DCI first order DCI It is for dispatching Traffic Channel in 1ms TTI or for dispatching the Traffic Channel in sTTI.
A kind of 25. transmitting device of Downlink Control Information, positioned at base station, it is characterised in that including：

Carrier module, for passing through conventional physical down control channel legacy PDCCH, enhancing Physical Downlink Control Channel At least one of EPDCCH, SPDCCH carry the Downlink Control Information of the terminal UE for dispatching short transmission time interval sTTI DCI, the SPDCCH are the Physical Downlink Control Channel in sTTI；

Sending module, for the DCI of carrying to be sent to terminal；

Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.
A kind of 26. transmitting device of Downlink Control Information, positioned at terminal UE, it is characterised in that including：

Receiving module, for receiving by conventional physical down control channel legacy PDCCH, enhancing physical down control letter The Downlink Control Information for being used to dispatch short transmission time interval sTTI UE of at least one of road EPDCCH, SPDCCH carrying DCI, the SPDCCH are the Physical Downlink Control Channel in sTTI；

Scheduler module, for being scheduled using the DCI；

Wherein, the Traffic Channel that the DCI is used to dispatch includes at least one of：

Traffic Channel in only sTTI；

The Traffic Channel in Traffic Channel or 1ms TTI in sTTI；

The Traffic Channel in Traffic Channel and 1ms TTI in sTTI.
27. a kind of Transmission system of Downlink Control Information, include the transmission dress of Downlink Control Information as claimed in claim 25 Put, and the transmitting device of Downlink Control Information as claimed in claim 26.