CN106162907A - The method and apparatus transmitting DCI in communication system based on machine-type communication - Google Patents
The method and apparatus transmitting DCI in communication system based on machine-type communication Download PDFInfo
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Abstract
The invention provides a kind of in the base station of communication system based on machine-type communication for the method transmitting DCI, comprise the following steps: via the Physical Downlink Control Channel for MTC, engrave when more than first, transmit the first DCI, and engrave when more than second, transmit the second DCI；Wherein, the first DCI described includes the schedule information for dispatching PDSCH/PUSCH, described the second DCI includes described for dispatching schedule information and the side information of PDSCH/PUSCH or only including described side information, and the frequency in described more than second moment is less than described more than first moment.
Description
Technical field
The present invention relates to communication system based on machine-type communication, particularly relate to based on machine type
For the method and apparatus transmitting DCI in the communication system of communication.
Background technology
Machine-type communication (Machine Type Communication, MTC) equipment is by machine
The subscriber equipment for application-specific (User Equipment, UE) that device uses.At 3GPP
In Rel-12, the work project verification about low complex degree MTC UE is reached a conclusion, wherein MTC
The complexity (cost) of UE decreases about 50%.In 3GPP Rel-13, another work
Project verification is it is determined that reduce the complexity of MTC UE further, thus increases coverage and change
The power consumption of kind MTC UE.
Assume 18dB is reached for the coverage enhancement of low complex degree MTC UE.In order to meet this
One higher coverage enhancement demand, maximally efficient coverage enhancement technology is for repeating.According to application
The simulation result of people understand, take around 180 to 330 times repeat transmit a packet
Thus realize the coverage enhancement of 18dB.But, this creates strong influence to spectrum efficiency.
The major technique reducing MTC UE complexity is penetrating low complex degree MTC UE
Frequently (Radio Frequency, RF) bandwidth is reduced to 1.4MHz (with 6 Physical Resource Block
(PRB) running, one of them PRB is the resource allocation unit in frequency domain).Low complexity
Degree MTC UE is expected to run in any system bandwidth and should be with existing
UE (legacy UE) coexists.Additionally, low complex degree MTC UE is expected to again adjust
Save its frequency to run on the different sub-band in bigger system bandwidth, thus allow low multiple
Channeling between miscellaneous degree MTC UE and and existing UE between channeling.
Summary of the invention
In current system, data transmission relates to sending descending control and indicates (Downlink
Control Indicator, DCI).Descending control instruction is carried by EPDCCH, is used for dispatching
PDSCH.MTC service is expected to less, such as, in the current simulation study of 3GPP
In be assumed to 72 information bits, and existing DCI format 1A needs to take 42 bits,
Therefore, if using current DCI format then can consume relatively large overhead.Operate at coverage enhancement
In, this DCI expense may result in the greater loss of spectrum efficiency, because coverage enhancement
Operation needs substantial amounts of repetition.It should be noted that required repetition and message size it
Between the most linear, that is, bigger packet may need more repetition.Cause
This, it is favourable for using compact DCI.
Operating for low complex degree MTC or coverage enhancement, some territories in current DCI are not
Need, therefore can be removed thus reduce DCI size.However, it is desirable to some are extra
Information bit, such as, subband instruction and repeat number of times.Therefore, the present invention proposes
It is exclusively used in two-stage DCI of low complex degree MTC UE.
In one embodiment, the first DCI in two-stage DCI includes for dispatching
The schedule information of PDSCH/PUSCH, the second DCI includes for dispatching
The schedule information of PDSCH/PUSCH and side information.This side information includes such as subband
Configuration information.
In another embodiment, the first DCI in two-stage DCI includes for dispatching
The schedule information of PDSCH/PUSCH, only includes side information in the second DCI.This benefit
The information of filling includes such as subband arrangement information.
Based on this, according to an aspect of the invention, it is provided one is being led to based on machine type
For the method transmitting DCI in the base station of the communication system of letter, comprise the following steps: via
For the Physical Downlink Control Channel of MTC, engrave when more than first, transmit the first
DCI, and engrave when more than second, transmit the second DCI；Wherein, described the first
DCI includes the schedule information for dispatching PDSCH/PUSCH, described the second DCI
Include the described schedule information for dispatching PDSCH/PUSCH and side information or only
Including described side information, and the frequency in described more than second moment is less than described more than first
The individual moment.
In one embodiment, described more than first moment corresponds to described for MTC's
Physical Downlink Control Channel carries out the moment detected.
In one embodiment, described method is further comprising the steps of: based on predefined parameter,
Determine described more than second moment；Wherein, described predefined parameter includes following any one or appoints
Multinomial:
-to the described moment detected for the Physical Downlink Control Channel of MTC；
-frequency hopping pattern；
-estimate duration across sub-frame chan-nel.
In one embodiment, include for dispatching as the first DCI described
The schedule information of PDSCH/PUSCH and described the second DCI only include described supplementing
During information, described more than second moment and the weight of a part of moment in described more than first moment
Folded.
In one embodiment, include for dispatching as the first DCI described
The schedule information of PDSCH/PUSCH and described the second DCI include described for adjusting
When the schedule information of degree PDSCH/PUSCH and described side information, to described more than second
Instants offset predetermined offset.
In one embodiment, include for dispatching as the first DCI described
The schedule information of PDSCH/PUSCH, and described the second DCI include described for
When the schedule information of scheduling PDSCH/PUSCH and described side information, described more than first
Moment corresponded to described in the moment that the Physical Downlink Control Channel of MTC detects
Remove the residue moment after described more than second moment.
In one embodiment, the described schedule information bag for dispatching PDSCH/PUSCH
Including resource block assignments information, the length of described resource block assignments information is less than or equal to 6 bits.
In one embodiment, described side information includes subband arrangement information.
In one embodiment, described side information also includes duplication control information.
According to another aspect of the present invention, it is provided that a kind of based on machine-type communication logical
For the method detecting DCI in the subscriber equipment of communication system, comprise the following steps: receive and use
Physical Downlink Control Channel in MTC；And respectively to the first DCI and the second DCI
Carrying out blind decoding, the first DCI wherein said includes for dispatching PDSCH/PUSCH
Schedule information, described the second DCI includes described for dispatching PDSCH/PUSCH
Schedule information and side information or only include described side information.
According to another aspect of the present invention, it is provided that a kind of based on machine-type communication logical
In the base station of communication system for transmitting the device of DCI, including transmitting element, for via
For the Physical Downlink Control Channel of MTC, engrave when more than first, transmit the first
DCI, and engrave when more than second, transmit the second DCI；Wherein, described the first
DCI includes the schedule information for dispatching PDSCH/PUSCH, described the second DCI
Include the described schedule information for dispatching PDSCH/PUSCH and side information or only
Including described side information, and the frequency in described more than second moment is less than described more than first
The individual moment.
According to another aspect of the present invention, it is provided that a kind of based on machine-type communication logical
For detecting the device of DCI in the subscriber equipment of communication system, including: receive unit, be used for
Receive the Physical Downlink Control Channel for MTC；And detector unit, for respectively to the
A kind of DCI and the second DCI carries out blind decoding, and the first DCI wherein said includes using
In the schedule information of scheduling PDSCH/PUSCH, described the second DCI includes described use
In dispatching schedule information and the side information of PDSCH/PUSCH or only including described supplementing
Information.
Various aspects of the invention are more clear by the explanation by embodiment in detail below
Clear.
Accompanying drawing explanation
By reading retouching in detail with reference to made non-limiting example is made of the following drawings
Stating, the other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the method for transmitting two-stage DCI according to an embodiment of the invention
Flow chart；
Fig. 2 shows that the transmission that repeats of two-stage DCI according to an embodiment of the invention is illustrated
Figure；And
Fig. 3 shows that the transmission that repeats of two-stage DCI according to another embodiment of the invention is shown
It is intended to.
In the drawings, same or similar reference represents identical or corresponding parts or feature.
Detailed description of the invention
The basic conception of the present invention is, defines two-stage DCI for low complex degree MTC UE,
For this two-stage DCI, base station uses different frequencies to transmit.In this two-stage DCI
A kind of DCI includes the schedule information for dispatching PDSCH/PUSCH, the second DCI
Include the schedule information for dispatching PDSCH/PUSCH and side information or only include
Side information, this side information can include such as subband arrangement information etc..The second DCI's
The transmission frequency transmission frequency less than the first DCI.
Hereinafter the first DCI basic respectively is included for dispatching PDSCH/PUSCH's
Schedule information, the second DCI includes the schedule information for dispatching PDSCH/PUSCH
And side information；And the first DCI includes the tune for dispatching PDSCH/PUSCH
Degree information, each to the present invention as a example by the second DCI only includes side information both situations
Embodiment in the base station of communication system based on machine-type communication for transmitting the side of DCI
Method is described.
The first DCI includes the schedule information for dispatching PDSCH/PUSCH, the
Two kinds of DCI include the schedule information for dispatching PDSCH/PUSCH and supplement
Information
With reference to Fig. 1, in step S101, base station controls via the physical down for MTC
Channel, engraves when more than first, transmits the first DCI, and more than second moment
On, transmit the second DCI.The frequency in this more than second moment is less than more than first moment.
It is understood that the Physical Downlink Control Channel for MTC can be EPDCCH,
Or the Physical Downlink Control Channel being specifically designed to MTC that will newly define in discussing future.
In coverage enhancement operates, in order to ensure being properly received, base station needs when transmitting DCI
Repeat, in this case, more than first moment of the application and more than second moment
In each moment can refer to the most respectively to repeat transmit DCI during repeat at the end of
Carve.
In one example, more than first moment can correspond to subscriber equipment to for MTC
Physical Downlink Control Channel carry out moment/subframe of detecting.When there is transmission in view of system
The situation such as prolong, it is to be understood that this more than first moment outline on a timeline early than with
The moment that Physical Downlink Control Channel for MTC is detected by family equipment.
Normally, the side information that the second DCI includes belongs to and will not frequently change
Information, therefore, the frequency in more than second moment can be less than the frequency in more than first moment.
This more than second moment can be pre-configured with by system, or by base station based on predetermined ginseng
Number determines.This predefined parameter can include following any one or appoint multinomial:
-moment that the Physical Downlink Control Channel of MTC is detected；
-frequency hopping pattern；
-estimate duration across sub-frame chan-nel.
In one case, this more than second moment may be with in more than first moment
The part moment is overlapping, such as, as shown in Figure 2, at τ2Moment, the weight of the first DCI
Multiple finish time is overlapping with the repetition finish time of the second DCI, so, corresponding to τ2Time
Carving, subscriber equipment will carry out twice blind decoding.In this case, can be to more than second
Moment offsets, such as, as shown in Figure 3, and can be pre-to more than second instants offset
Determine offset Δ T, so that in each moment in more than second moment and more than first moment
Each moment non-overlapping copies, thus can reduce each blind decoding number of times.
Additionally, due to the second DCI includes for dispatching PDSCH/PUSCH's simultaneously
Schedule information and side information, therefore, in more than second moment with more than first moment
During a part of moment overlap, can consider only to transmit the second DCI in the moment of these overlaps
And no longer transmit the first DCI.For example, it is assumed that original more than first moment corresponding to
Physical Downlink Control Channel in MTC carries out the moment detected, then, in this embodiment,
The first DCI can be only corresponding to examining the Physical Downlink Control Channel for MTC
The moment surveyed removes upper transmission of remaining moment after more than second moment.As such, it is possible to
Reduce each blind decoding number of times to a certain extent.
The first DCI includes the schedule information for dispatching PDSCH/PUSCH, the
Two kinds of DCI only include side information
In this embodiment, similarly, base station controls letter via the physical down for MTC
Road, engraves when more than first, transmits the first DCI, and engraves when more than second,
Transmission the second DCI.The frequency in this more than second moment is less than more than first moment.
The determination mode in this more than first moment and more than second moment can use and above-mentioned reality
Executing the mode that the mode in example is similar, for simplicity's sake, therefore not to repeat here.Additionally, by
In the second DCI, only include that side information does not include for dispatching PDSCH/PUSCH
Schedule information, hence it is advantageous to, more than second moment need with in more than first moment
A part of moment overlapping.If it is understood that determined by base station when more than second
Carve the most overlapping with more than first moment, then can be by more than second moment is offset
Realize more than second moment overlapping with a part of moment in more than first moment.
The first DCI includes the schedule information for dispatching PDSCH/PUSCH, specifically
Ground, it can be by multiple concrete manifestation form.In one embodiment, the first DCI
Form is as shown in table 1 below:
Table 1
The second DCI includes simultaneously schedule information for dispatching PDSCH/PUSCH and
Side information, specifically, it can be by multiple concrete manifestation form.In one embodiment,
The form of the second DCI is as shown in table 2 below:
Table 2
For the second DCI only includes the situation of side information, in one embodiment,
Its form can be as shown in table 3 below:
Table 3
Hereinafter the resource allocation field in the form of the first DCI and/or the second DCI is entered
Row explanation.
Assuming that the 6 of MTC subband PRBs are respectively by a1, a2, a3, a4, a5, a6 represent.
If the MTC subband distributed includes less PRBs, such as, in the feelings that PRB is overlapping
Under shape, then disabled PRBs is removed from resource allocation field.Resource allocation bit quilt
Coding identifies distribution index.
-resource block assignments territory is 2bits
2bits resource block assignments scheme can be as shown in the table:
| Index | Resource is distributed |
| 1 | a1 |
| 2 | a2,a3 |
| 3 | a4,a5,a6 |
| 4 | a1,a2,a3,a4,a5,a6 |
-resource block assignments territory is 3bits
3bits resource block assignments scheme can be as shown in the table:
| Index | Resource is distributed |
| 1 | a1 |
| 2 | a2 |
| 3 | a3,a4 |
| 4 | a5,a6 |
| 5 | a1,a2,a3 |
| 6 | a4,a5,a6 |
| 7 | a1,a2,a3,a4 |
| 8 | a1,a2,a3,a4,a5,a6 |
-resource block assignments territory is 4bits
4bits resource block assignments scheme can be as shown in the table:
| Index | Resource is distributed |
| 1 | a1 |
| 2 | a2 |
| 3 | a3 |
| 4 | a4 |
| 5 | a5 |
| 6 | a6 |
| 7 | a1,a2 |
| 8 | a3,a4 |
| 9 | a5,a6 |
| 10 | a1,a2,a3 |
| 11 | a4,a5,a6 |
| 12 | a1,a2,a3,a4 |
| 13 | a3,a4,a5,a6 |
| 14 | a1,a2,a3,a4,a5 |
| 15 | a1,a2,a3,a4,a5,a6 |
In one or more exemplary design, can use hardware, software, firmware or they
Combination in any realize function described herein.If realized with software, the most permissible
Described function is stored on a computer-readable medium as one or more instructions or code,
Or transmit as the one or more instructions on computer-readable medium or code.Calculate
Machine computer-readable recording medium includes computer-readable storage medium and communication media, and wherein communication media includes
Help computer program and be delivered to the arbitrary medium of another place from a place.Storage is situated between
Matter can be the addressable any usable medium of universal or special computer.This computer can
Read medium and can include, for example, but not limited to, RAM, ROM, EEPROM, CD-ROM
Or other optical disc memory apparatus, disk storage equipment or other magnetic storage apparatus, or available
In with universal or special computer or the addressable instruction of universal or special processor or data
Other medium any of desired code modules is carried or stored to the form of structure.And
And, arbitrarily connect computer-readable medium of can also being known as.Such as, if software is
Use coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or the most infrared
The wireless technology of line, radio and microwave etc is come from website, server or other remote source
Transmission, then coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray,
The wireless technology of radio and microwave etc is also included within the definition of medium.
General processor, digital signal processor (DSP), special IC can be used
(ASIC), field programmable gate array (FPGA) or other PLD, point
Found door or transistor logic, discrete hardware components or be used for performing function as herein described
Combination in any realize or perform combining the various exemplary logical block described by the disclosure,
Module and circuit.General processor can be microprocessor, or, processor can also be
The processor of any routine, controller, microcontroller or state machine.Processor can also
It is embodied as the combination of calculating equipment, such as, DSP and the combination of microprocessor, multiple micro-place
Reason device, one or more microprocessor and the combination of DSP core, or other this kind any
Structure.
Those of ordinary skill in the art it is also understood that and combine what embodiments herein described
Various exemplary logical blocks, module, circuit and algorithm steps can be implemented as electronic hardware,
Computer software or combination.This in order to clearly show that between hardware and software
Interchangeability, all encloses various exemplary parts, block, module, circuit and step above
General description has been carried out around its function.It is implemented as hardware as this function still to realize
Become software, depend on specifically applying and apply design constraint over the whole system.
Those skilled in the art can realize described for every kind of application-specific in the way of flexible
Function, but, this realize decision-making and should not be interpreted as causing a departure from the scope of this disclosure.
The above description of the disclosure is for making any those of ordinary skill of this area be capable of
Or the use present invention.To those skilled in the art, the various amendments of the disclosure
Will be apparent from, and general principle defined herein can also be without departing from this
Other deformation it is applied in the case of bright spirit and scope.Therefore, the present invention is not
Be limited to example as herein described and design, but with principle disclosed herein and novel features
The widest scope consistent.
Claims (15)
1. one kind is used for transmitting DCI's in the base station of communication system based on machine-type communication
Method, comprises the following steps:
-via the Physical Downlink Control Channel for MTC, engrave when more than first, pass
The first DCI defeated, and engrave when more than second, transmit the second DCI；
Wherein, the first DCI described includes the scheduling for dispatching PDSCH/PUSCH
Information, described the second DCI includes described for dispatching the scheduling of PDSCH/PUSCH
Information and side information or only include described side information, and described more than second moment
Frequency less than described more than first moment.
Method the most according to claim 1, it is characterised in that when described more than first
Carve corresponding to the described moment detected for the Physical Downlink Control Channel of MTC.
Method the most according to claim 1 and 2, it is characterised in that described method is also
Comprise the following steps:
-based on predefined parameter, determine described more than second moment；
Wherein, described predefined parameter includes following any one or appoints multinomial:
-to the described moment detected for the Physical Downlink Control Channel of MTC；
-frequency hopping pattern；
-estimate duration across sub-frame chan-nel.
Method the most according to claim 1, it is characterised in that as the first DCI described
Include in the schedule information for dispatching PDSCH/PUSCH and described the second DCI
When only including described side information, in described more than second moment and described more than first moment
A part of moment overlapping.
Method the most according to claim 1, it is characterised in that as the first DCI described
Include in the schedule information for dispatching PDSCH/PUSCH and described the second DCI
Described in including when the schedule information and described side information dispatching PDSCH/PUSCH,
To described more than second instants offset predetermined offset.
The most according to the method in claim 2 or 3, it is characterised in that when described first
Plant DCI and include the schedule information for dispatching PDSCH/PUSCH, and described second
Kind of DCI includes the described schedule information for dispatching PDSCH/PUSCH and described supplements
During information, described more than first moment is corresponding to controlling the described physical down for MTC
Channel carries out the residue moment after removing described more than second moment in the moment detected.
Method the most according to claim 1, it is characterised in that described for dispatching
The schedule information of PDSCH/PUSCH includes resource block assignments information, and described resource block assignments is believed
The length of breath is less than or equal to 6 bits.
Method the most according to claim 1, it is characterised in that described side information bag
Enclosed tool band configuration information.
Method the most according to claim 8, it is characterised in that described side information is also
Including duplication control information.
10. one kind is used for detecting in the subscriber equipment of communication system based on machine-type communication
The method of DCI, comprises the following steps:
-receive the Physical Downlink Control Channel for MTC；
-respectively the first DCI and the second DCI is carried out blind decoding, wherein said first
Plant DCI and include the schedule information for dispatching PDSCH/PUSCH, described the second DCI
Include the described schedule information for dispatching PDSCH/PUSCH and side information or only
Including described side information.
11. 1 kinds are used for transmitting DCI in the base station of communication system based on machine-type communication
Device, including:
Transmitting element, for via the Physical Downlink Control Channel for MTC, more than first
Engrave time individual, transmit the first DCI, and engrave when more than second, transmit the second
DCI；Wherein, the first DCI described includes the tune for dispatching PDSCH/PUSCH
Degree information, described the second DCI includes described for dispatching the tune of PDSCH/PUSCH
Degree information and side information or only include described side information, and when described more than second
The frequency carved is less than described more than first moment.
12. devices according to claim 11, it is characterised in that described more than first
Moment is corresponding to the described moment detected for the Physical Downlink Control Channel of MTC.
13. according to the device described in claim 11 or 12, it is characterised in that also include:
Determine unit, for based on predefined parameter, determine described more than second moment；
Wherein, described predefined parameter includes following any one or appoints multinomial:
-to the described moment detected for the Physical Downlink Control Channel of MTC；
-frequency hopping pattern；
-estimate duration across sub-frame chan-nel.
14. devices according to claim 11, it is characterised in that described side information
Including subband arrangement information.
15. 1 kinds are used for detecting in the subscriber equipment of communication system based on machine-type communication
The device of DCI, including:
Receive unit, for receiving the Physical Downlink Control Channel for MTC；
Detector unit, for respectively the first DCI and the second DCI being carried out blind decoding,
The first DCI wherein said includes the schedule information for dispatching PDSCH/PUSCH,
Described the second DCI include the described schedule information for dispatching PDSCH/PUSCH and
Side information or only include described side information.
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