CN110086567B - Method for enhancing DCI (Downlink control information) carrying mode information of HARQ (hybrid automatic repeat request) stop process - Google Patents
Method for enhancing DCI (Downlink control information) carrying mode information of HARQ (hybrid automatic repeat request) stop process Download PDFInfo
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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Abstract
The invention belongs to the technical field of wireless communication, and discloses a method for enhancing mode information of processes such as HARQ stop and the like carried in DCI; adding HARQ stop-wait process mode Pattern information in the DCI; an identifier for identifying whether the data transmitted this time is newly transmitted data or retransmitted data in the DCI; information is added to the DCI scheduling the uplink and downlink, respectively. Through PDCCH control, the signaling overhead of RRC can be reduced. The PDCCH and PDSCH data are transmitted simultaneously, and the change of the HARQ Process mode is completed before the data is received. The real-time performance is high, and the adjustment is carried out at any time according to the data sending requirement. The PDCCH is a physical channel and is directly sent to an air interface without a responsible control flow, so that the complexity is reduced. The invention realizes more control on the HARQ process by the enhancement of the PDCCH; the complexity of the flow control is reduced.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a method for enhancing mode information of processes such as HARQ stop and the like carried in DCI.
Background
Currently, the closest prior art: for flexible air interface requirements in 5G, for example, URLLC service may trigger a resource scheduled by MAC to be directly inserted into an eMBB resource, which is called Preemption (Preemption) of URLLC, and a 5G system is to implement such real-time service transceiving. Then, each idle Process (HARQ Process) of HARQ for receiving and transmitting data packets over the air interface needs to be flexibly controlled according to the requirement of service data transmission.
Currently, there is no configuration indication of the HARQ Process mode in the format of DCI. In the HARQ Process information in the current standard, there is no information configured for each Process in the synchronous or asynchronous mode.
DCI0_0 and DCI0_ 1:
-Time domain resource assignment–4bits as defined in Subclause 6.1.2.1of[6,TS 38.214]
-Frequency hopping flag–1bit according to Table 7.3.1.1.1-3,as defined in Subclause 6.3of[6,TS 38.214]
-Modulation and coding scheme–5bits as defined in Subclause 6.1.4.1of[6,TS 38.214]/*MCS*/
-New data indicator-1 bit/. identification of newly transmitted and retransmitted data. will >
-reduction version-2 bits as defined in Table 7.3.1.1.1-2/. version merged version. sup. -
-the index number of HARQ Process number-4 bits/. the HARQ stop etc. Process, i.e. the Process ID. From the length of the ID, a maximum of 16 stop processes are available for use +
-TPC command for scheduled PUSCH–2bits as defined in Subclause 7.1.1of[5,TS 38.213]
-Paddingbits,ifrequired.
DCI1_0：
-Time domain resource assignment–4bits as defined in Subclause 5.1.2.1of[6,TS 38.214]
-VRB-to-PRB mapping–1bit according to Table 7.3.1.1.2-33
-Modulation and coding scheme–5bits as defined in Subclause 5.1.3of[6,TS 38.214]/*MCS*/
-New data indicator-1 bit/. identification of newly transmitted and retransmitted data. will >
-reduction version-2 bits as defined in Table 7.3.1.1.1-2/. version merged version. sup. -
-the index number of HARQ Process number-4 bits/. the HARQ stop etc. Process, i.e. the Process ID. From the length of the ID, a maximum of 16 stop processes are available for use +
-Downlink assignment index–2bits as defined in Subclause 9.1.3of[5,TS38.213],as counter DAI
-TPC command for scheduled PUCCH–2bits as defined in Subclause 7.2.1of[5,TS 38.213]
-PUCCH resource indicator–3bits as defined in Subclause 9.2.3of[5,TS38.213]
-PDSCH-to-HARQ_feedback timing indicator–3bits as defined in Subclause9.2.3of[5,TS38.213]
DCI1_1：
Fortransportblock 1:
-Modulation and coding scheme–5bits as defined in Subclause 5.1.3.1of[6,TS 38.214]/*MCS*/
-New data indicator-1 bit/. identification of newly transmitted and retransmitted data. will >
-reduction version-2 bits as defined in Table 7.3.1.1.1-2/. version merged version. sup. -
For transport block 2(only present if maxNrofCodeWordsScheduledByDCI equals 2):
-Modulation and coding scheme–5bits as defined in Subclause 5.1.3.1of[6,TS 38.214]/*MCS*/
-New data indicator-1 bit/. identification of newly transmitted and retransmitted data. will >
-reduction version-2 bits as defined in Table 7.3.1.1.1-2/. version merged version. sup. -
-the index number of HARQ Process number-4 bits/. the HARQ stop etc. Process, i.e. the Process ID. From the length of the ID, a maximum of 16 stop processes are available for use +
-Downlink assignment index–number ofbits as defined in the following
-TPC command for scheduled PUCCH–2bits as defined in Subclause 7.2.1of[5,TS 38.213]
-PUCCH resource indicator–3bits as defined in Subclause 9.2.3of[5,TS38.213]
-PDSCH-to-HARQ_feedback timing indicator–0,1,2,or 3bits as defined in Subclause 9.2.3of[5,TS 38.213].The bitwidth for this field is determined as bits,where I is the number ofentries in the higherlayerparameterdl-DataToUL-ACK。
In summary, the problems of the prior art are as follows: in the face of the preemption scenario, at present, no change is made to the HARQ Process, and the HARQ stop Process needs to be flexibly changed in real time to achieve correct transceiving of the service data packet.
The difficulty of solving the technical problems is as follows:
this problem, which relates to the modification of the HARQ mode scheme, the control of the HARQ Process, the transmission-feedback mechanism of the air interface, and so on, brings about the modification of the signaling, control, and data transceiving flows.
The significance of solving the technical problems is as follows:
from the trend of the development of the existing 5G technology, an air interface is more and more flexible, in the 4G era, 1ms of the air interface is used as a data transmission or reception period, 1ms of the air interface is divided into a plurality of Time slots (Time slots) by 5G, each Time Slot is divided into a plurality of symbols (symbols), and data can be transmitted and received according to symbol accuracy. This means that both UL and DL can be present in one time slot. In the face of such flexible air interface configuration, HARQ processes controlled by air interface data transmission and reception need to be modified correspondingly.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for enhancing the mode information of the process of HARQ stop and wait carried in DCI.
The invention is realized in this way, a method for enhancing the mode information of the HARQ stop process carried in the DCI, the method for enhancing the mode information of the HARQ stop process carried in the DCI comprises the following steps:
step one, adding HARQ stop process mode Pattern information in DCI;
secondly, identifying whether the data transmitted this time is newly transmitted data or retransmitted data in the DCI;
and thirdly, adding information in the DCI for scheduling the uplink and the downlink respectively.
Further, the method for enhancing DCI carrying mode information of HARQ stop-and-wait processes adds HARQ stop-and-wait process mode (Pattern) information to DCI, where the mode information at least includes: the Mode of the HARQ stop process is that whether the air interface is in an asynchronous Mode or a synchronous Mode;
the method can also comprise the following steps:
an indication of whether the mode is enabled;
the Slot index of the starting Slot of the asynchronous mode or synchronous mode starting, and/or the index of the symbol in the Slot;
if the mode is the synchronous mode, the process ID and the slot or the symbol symybol of the air interface time domain are bound;
length of the above field:
mode of HARQ stop-and-wait process: 1bit, step Mode or synchronous Mode; respectively identified by 0 or 1;
and (3) starting identification: 1 bit;
slot index: 6 bits;
symbol index: 4 bits;
binding mode: 2-3 bits, defining various relations mapped by a binding mode, wherein the mapping relation between the Process ID and the time is not necessarily obtained by calculation, appointing a specified relation, and then sequencing according to the sequence; or defining several fixed mapping relations in the protocol, and sending the indexes of the mapping relations for times.
Further, the enhanced content of the enhanced method carrying the mode information of the HARQ stop and wait process in the DCI has a logical control relationship with the new data indication NDI; when the indication indicates that the transmitted data is retransmission data, the HARQ stop-wait process mode cannot be modified; and when the indication indicates that the transmitted data is newly transmitted data, modifying the HARQ stop and wait process mode.
Further, the method for enhancing DCI carrying mode information of HARQ stop and wait processes, wherein the step of adding the information to DCI scheduling uplink and downlink specifically includes:
DCI for scheduling downlink, DCI1_0, DCI1_ 1:
after the information is added, the base station side carries the information in the DCI of the scheduling PDSCH; after the data scheduled at this time is sent, the base station side controls the receiving and time sequence relation of the stop process according to a new mode; when the terminal receives the PDCCH, the uplink feedback is continued according to a specified mode, and the data on the PDSCH indicated by the DCI is received;
DCI for scheduling uplink, DCI0_0, DCI0_ 1:
after the information is added, the base station side schedules the DCI of the PUSCH to carry the information; after the UL Grant uplink resource authorization of the DCI is sent, when the data of the PUSCH is sent, the data is sent by using a mode designated by the DCI; and the base station side prepares corresponding downlink feedback according to a specified mode.
Another object of the present invention is to provide a computer program for implementing an enhanced method for carrying mode information of HARQ stop and wait processes in the DCI.
Another objective of the present invention is to provide an information data processing terminal for implementing the method for enhancing DCI carrying mode information of HARQ stop and wait processes.
Another object of the present invention is to provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to execute the method for enhancing DCI carrying mode information of HARQ stop and wait processes.
In summary, the advantages and positive effects of the invention are: the invention realizes more control on the HARQ process by the enhancement of the PDCCH; the complexity of the flow control is reduced.
Through PDCCH control, the signaling overhead of RRC can be reduced. The PDCCH and PDSCH data are transmitted simultaneously, and the change of the HARQ Process mode is completed before the data is received. The real-time performance is high because the PDCCH is transmitted along with the scheduling of the MAC and is adjusted at any time according to the data transmission requirement. The PDCCH is a physical channel and is directly sent to an air interface without a responsible control flow, so that the complexity is reduced.
Drawings
Fig. 1 is a flowchart of an enhancement method for carrying mode information of a HARQ stop process in DCI according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides an enhancement method for mode information carrying HARQ stop and wait processes in DCI, which carries expanded information of the HARQ stop and wait processes in the DCI for controlling the HARQ processes (HARQ stop and wait processes) and realizes the mode switching of the HARQ stop and wait processes between a synchronous mode and an asynchronous mode. DCI Downlink Control Information; HARQ, Hybrid Automatic Repeat reQuest; physical Downlink Control Channel (PDCCH).
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1, the method for enhancing DCI carrying mode information of HARQ stop and wait processes provided in the embodiment of the present invention includes the following steps:
s101: adding HARQ stop-wait process mode (Pattern) information in the DCI;
s102: an identifier for identifying whether the data transmitted this time is newly transmitted data or retransmitted data in the DCI;
s103: information is added to the DCI scheduling the uplink and downlink, respectively.
The method for enhancing the mode information of the processes such as HARQ stop and the like carried in the DCI provided by the embodiment of the invention specifically comprises the following steps:
the harq Process information contained in the information carried by the current DCI includes:
HARQ process number–4bits
the index number of the HARQ Process, i.e. the Process ID. From the length of the ID, a maximum of 16 stop-and-wait processes are available.
1. Enhanced content for DCI scheduling information
Adding HARQ stop-and-wait process mode (Pattern) information into the DCI. The mode information includes at least: the Mode of the HARQ suspended process is, i.e., whether the air interface is in an asynchronous Mode (Mode) or a synchronous Mode (Mode).
The method can also comprise the following steps:
an indication of whether the mode is enabled.
The index of the starting Slot (Slot) for the start of either asynchronous mode or synchronous mode, and/or the index of the symbol (symbol) within the Slot.
And if the synchronization mode is adopted, the process ID is bound with the slot or symbol.
Length of the above field:
mode of HARQ stop-and-wait process: 1bit, step Mode (Mode) or synchronous Mode (Mode); respectively identified by 0 or 1.
And (3) starting identification: 1 bit.
Slot index: 6 bits;
symbol index: 4 bits;
binding mode: 2-3 bits, defining various relations of the binding mode mapping. The mapping relation between the Process ID and the time is not necessarily obtained by calculation, and a specified relation can be specified and then sequenced in sequence; or defining several fixed mapping relations in the protocol, and sending the indexes of the mapping relations for times.
New data indicator-1 bit/. The New data and retransmitted data mark. The
2. And identifying whether the data transmitted this time is new data or retransmission data in the DCI. In order to ensure correct data transceiving, the modification of the HARQ stop-and-wait process mode is only for idle processes. No changes can be made to the process that is retransmitting the data. Therefore, the enhanced contents have a logical control relationship with a New Data Indicator (NDI). When the indication indicates that the transmitted data is retransmission data, the HARQ stop-wait process mode cannot be modified; when the indication indicates that the transmitted data is newly transmitted data, the HARQ off-waiting process mode may be modified.
3. The above information is added to DCI scheduling uplink and downlink, respectively.
DCI for scheduling downlink (DCI1_0, DCI1_ 1):
after the information is added, the base station side carries the information in the DCI of the scheduled PDSCH. After the scheduled data is sent, the base station side controls the receiving and time sequence relation of the stop process according to the new mode. And when the terminal receives the PDCCH, the terminal continues uplink feedback according to the specified mode and receives the data on the PDSCH indicated by the DCI.
DCI for scheduling uplink (DCI0_0, DCI0_ 1):
after the information is added, the base station side schedules the DCI of the PUSCH to carry the information. After the UL Grant (uplink resource Grant) of the current DCI is transmitted, when data of the PUSCH is transmitted, the data is transmitted using a mode designated by the DCI. And the base station side prepares corresponding downlink feedback according to a specified mode.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
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