WO2020042528A1

WO2020042528A1 - Mobile communication system, network device, terminal device, and data scheduling method

Info

Publication number: WO2020042528A1
Application number: PCT/CN2019/071428
Authority: WO
Inventors: 闫志宇; 杜滢
Original assignee: 中国信息通信研究院
Priority date: 2018-08-31
Filing date: 2019-01-11
Publication date: 2020-03-05
Also published as: CN110061816A; CN110061816B

Abstract

The present application discloses a mobile communication system, a network device, a terminal device, and a data scheduling method. The data scheduling method comprises the following steps: searching a PDCCH original set and at least one redundant PDCCH, the PDCCH original set comprising a protected PDCCH, and the protected PDCCH and the redundant PDCCH being used to schedule the same target PDSCH and having the same DAI field； determining the number of bits of a HARQ-ACK codebook according to all DAI fields of a PDCCH recovery set; determining, according to the DAI field of the at least one redundant PDCCH, the order of HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook; and transmitting the HARQ-ACK codebook. The present application also discloses a mobile communication network device, a terminal device, and a system for applying the method. A dynamic HARQ-ACK codebook determined by using a DAI sort method in a downlink control channel in the invention meets time delay requirements and efficiency requirements of transmitting uplink control information in an NR system.

Description

Mobile communication system, network equipment, terminal equipment and data scheduling method

This application claims the priority of a Chinese patent application filed on August 31, 2018 with the Chinese Patent Office, application number 201811014512.8, and the invention name "a mobile communication system, network equipment, terminal equipment, and data scheduling method", all of which The contents are incorporated herein by reference.

Technical field

The present application relates to the field of mobile communication technology, and in particular, to a data scheduling method, and a mobile communication device and system applying the data scheduling method.

Background technique

In NR technology, a network device schedules a physical downlink shared channel (PDSCH) for transmitting downlink information through a physical downlink control channel (PDCCH), and a physical uplink shared channel (PUSCH) for a terminal device (UE) to send uplink information. The terminal device sends acknowledgement (ACK) or non-acknowledgement (NACK) information for receiving downlink service data to the network device, so that the network device determines whether to reschedule the downlink service data or schedule channel downlink service data to the terminal device. The ACK and NACK information are collectively referred to as hybrid automatic repeat request response information (HARQ-ACK).

When the network device sends the PDCCH to the terminal device only on a part of the downlink channels in the "HARQ feedback window", using the HARQ-ACK dynamic codebook determination method, the terminal device only feedbacks the corresponding HARQ-ACK information for the downlink channel that receives the PDCCH. In an actual system, the terminal device may lose some downlink control information (DCI). The Downlink Assignment Index (DAI) field in the PDCCH can be used to determine the missing PDCCH and feedback NACK at the position corresponding to the missing PDCCH. information. 3GPP TS 38.213 vf20 section 9.1 gives a technical solution for determining the number and content of HARQ-ACK codebook bits according to DAI.

In order to meet the reliability requirements of URLLC business services, the PDCCH is repeatedly sent multiple times for the same PDSCH to improve the reliability of the control channel. The multiple PDCCHs have different transmission time resources, different transmission frequency resources, or different transmission time and frequency resources. Repeated transmission of PDCCH results in information redundancy and reduces the efficiency of HARQ-ACK responses between terminal equipment and network equipment.

Summary of the Invention

The present application provides a mobile communication system, a network device, a terminal device, and a data scheduling method, which aim to solve the problem of how to perform an efficient hybrid automatic retransmission request response between a network device and a terminal device when multiple PDCCHs correspond to the same PDSCH.

This application provides a data scheduling method for a mobile communication system, which is used in a mobile terminal of a mobile communication system, and includes the following steps:

Search the PDCCH original set and at least one redundant PDCCH; the PDCCH original set includes protected PDCCHs; the protected PDCCH and redundant PDCCHs are used to schedule the same target PDSCH and the DAI field is the same;

Determine the number of bits of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set; the PDCCH recovery set includes a portion searched in the PDCCH original set and a recovery PDCCH, where the recovery PDCCH is located at a protected PDCCH position and A DAI field containing any one of the searched redundant PDCCHs;

Determine the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook according to the DAI field of any one of the searched redundant PDCCHs;

Sending the HARQ-ACK codebook.

This application also provides a data scheduling method for a mobile communication system, which is used for a network device of a mobile communication system, and includes the following steps:

Send the PDCCH original set and at least one redundant PDCCH; the PDCCH original set includes a protected PDCCH; the protected PDCCH and the redundant PDCCH are used to schedule the same target PDSCH and the DAI field is the same;

The values of the DAI fields of the protected PDCCH and the redundant PDCCH are determined according to the positions of the protected PDCCH in the PDCCH original set;

The relative position relationship between the protected PDCCH and the transmission resource occupied by the redundant PDCCH is preset; the protected PDCCH and the redundant PDCCH satisfy at least one of the following conditions: the serving cell index is the smallest, the monitoring time is the earliest, CORESET index is smallest, bandwidth part index is smallest, search space index is smallest, CCE index is smallest.

Preferably, the DAI field includes a count DAI; the value of the count DAI of each PDCCH in the PDCCH original set represents a serial number of each PDCCH in the PDCCH original set.

Preferably, the DAI field contains the total DAI; the value of the total DAI of each PDCCH in the PDCCH original set indicates that as of the monitoring time at which each PDCCH is located, the PDCCH original set is scheduled within the HARQ window The total number of PDCCHs.

Preferably, the protected PDCCH and the redundant PDCCH satisfy that the monitoring time corresponding to the protected PDCCH is the earliest, and when the monitoring time corresponding to the protected PDCCH and the redundant PDCCH is the same, the protected PDCCH corresponds to The serving cell index value is the smallest.

Preferably, in any embodiment of the present application, the PDCCH original set further includes an unprotected PDCCH.

The present application also provides a terminal device for a mobile communication system, which is used in the method described in the embodiments of the present application. The terminal device includes a terminal processing module; the terminal processing module is configured to: search the PDCCH original set and at least one redundancy. PDCCH; recovering the protected PDCCH according to the DAI field of any redundant PDCCH searched, determining the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook; generating the PDCCH recovery set, Determine the number of bits in the HARQ-ACK codebook; and send the HARQ-ACK codebook.

The present application also provides a network device for a mobile communication system, which is used in the method described in the embodiments of the present application. The network device includes a network processing module. The network processing module is configured to generate and send the PDCCH original set and the redundant PDCCH. Receive the HARQ-ACK codebook.

The present application further provides a mobile communication system, including the terminal device according to any one embodiment of the application and the network device according to any one embodiment.

The at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

The method for transmitting uplink control information provided by the present invention solves the problem of how to determine the size of the HARQ-ACK codebook and determine the PDSCH when multiple PDCCH transmissions correspond to the same PDSCH in the case where the transmission performance of the protected PDCCH is improved by redundant PDCCH. The problem of ordering in the HARQ-ACK codebook. By adopting the solution of the present invention, the efficiency of HARQ-ACK feedback can be improved, and at the same time, the performance requirements of the PDCCH can be met.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

FIG. 1 is an example of counting DAI and total DAI values in DCI in a carrier aggregation scenario in the prior art;

FIG. 2 is a schematic diagram of HARQ-ACK information;

3 is a flowchart of an embodiment of a method for a network device according to the present invention;

4 is a flowchart of an embodiment of a method for a terminal device according to the present invention;

5 is a schematic diagram of PDCCH arrangement when two PDCCHs correspond to one PDSCH;

FIG. 6 is a schematic diagram of a HARQ-ACK message sent by a mobile terminal, where

(a) is a case where both the protected PDCCH and the redundant PDCCH are lost;

(b) is the case where the protected PDCCH is lost;

(c) is the case where the redundant PDCCH is lost;

(d) is the case where both the protected PDCCH and the redundant PDCCH are received;

FIG. 7 is a schematic diagram of a system embodiment of the present invention.

detailed description

In order to make the purpose, technical solution, and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

When the same PDSCH transmission is scheduled through K PDCCHs, the K PDCCHs have different transmission time resources, different transmission frequency resources, or different transmission time and frequency resources. There are no prior art solutions for how to determine the DAI field in the K-th PDCCH, and how to determine the position of the HARQ-ACK information of the PDSCH corresponding to the K-th PDCCH in the HARQ-ACK codebook information.

In the solution of the present invention, the value of the DAI in the K PDCCHs is determined according to the location of the first PDCCH (that is, the protected PDCCH); the UE is based on the received PDCCH that is repeatedly sent at least once (that is, the redundancy) (PDCCH) determines the location of the protected PDCCH, determines the codebook size of the HARQ-ACK that is fed back according to the DAI field in the received PDCCH, and determines the HARQ-ACK feedback information of the PDSCH indicated by the redundant PDCCH in the HARQ- Ordering in the ACK codebook. Here, the position of the protected PDCCH refers to the position of the transmission resource of the protected PDCCH, specifically, the serving cell index, monitoring time, CORESET index, bandwidth part index, search space index, CCE index (preferably , The position identified by at least one of the first CCE index in the protected PDCCH).

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the drawings.

FIG. 1 is an example of numerical values of the counting DAI and the total DAI in the DCI in the prior art carrier aggregation scenario. If each PDCCH corresponds to one PDSCH, the formed PDCCH set is called a PDCCH original set; each PDCCH includes a DAI field.

The DAI field contains a "count DAI"; the value of the count DAI of each PDCCH in the PDCCH original set indicates the serial number of each PDCCH in the PDCCH original set.

The DAI field also contains a "total DAI"; the value of the total DAI of each PDCCH in the PDCCH original set indicates that as of the monitoring time where each PDCCH is located, the PDCCH original set is scheduled within the HARQ window The total number of PDCCHs.

The PDCCH original set is sent within a HARQ feedback window.

It should be noted that: the "count DAI" is used to tell the terminal device where the current PDCCH occupies in the PDCCH original set; the "total DAI" is used to tell the terminal device to close the current time, the PDCCH original set Number of scheduled PDCCHs. This can help the terminal device identify whether some PDCCHs have been lost, and can also help the terminal device determine how many bits of HARQ-ACK information need to be fed back.

In one embodiment of the mobile communication system, the DAI field in format 1 (denoted as DCI format 1_0) of the PDCCH includes a 2-bit count DAI. Format 2 of the PDCCH (denoted as DCI format 1_1). The DAI field includes a 2-bit count DAI when the terminal device is configured with 1 cell service; the DAI field includes 2 when the terminal device is configured with more than 1 cell service. The bit count DAI and the total 2 bits DAI. Specifically, the value of the counting DAI in DCI format 1_0 and DCI format 1_1 is based on the current PDCCH position in the {serving cell, PDCCH monitoring time} space (in this application document, "PDCCH monitoring time" or "monitoring time" ), First according to the serving cell index, and then in the order of the monitoring time index from low to high and then counting the serial number. The value of the total DAI in the PDCCH format 1_1 is updated according to the granularity of each monitoring time, and the value is the number of PDCCHs that have been sent up to the current monitoring time. In FIG. 1, carrier aggregation of 3 cells is used, and the count DAI and the total DAI each include 2 bits. For example, "4" in "4/5" indicates the count DAI, and "5" indicates the total DAI.

It should be noted that the PDCCH original set is composed of unprotected PDCCH and protected PDCCH, that is, the PDCCH in the PDCCH original set is divided into two types: unprotected PDCCH and protected PDCCH; in special cases, no The number of protected PDCCHs is 0; the protected PDCCH means that there is at least one redundant PDCCH corresponding thereto, but the redundant PDCCH is not included in the PDCCH original set.

FIG. 2 is a schematic diagram of HARQ-ACK information. In an embodiment of the present application, the value of the counter DAI in DCI format 1_0 and DCI format 1_1 is related to the {serving cell, monitoring time} where the DCI is located, and each DCI corresponds to a PDSCH scheduling. According to the value of the counting DAI in DCI format 1_0 / DCI format 1_1, the terminal device can determine the HARQ-ACK information of the corresponding PDSCH HARQ-ACK in O _ACK bit

Specific location. Taking the PDCCH original set in FIG. 1 as an example, if the terminal device does not receive the high-level configuration signaling "PUCCH HARQ-ACK space bundling" and receives the high-level configuration signaling "DCI scheduling maximum number of codewords", then O _ACK = 20. The HARQ-ACK information fed back by the terminal device in Slot n is

If the terminal device receives the high-level configuration signaling "PUCCH HARQ-ACK space bundling" and / or does not receive the high-level configuration signaling "DCI scheduling maximum number of codewords", then O _ACK = 10, the terminal device is in Slot n Each bit of HARQ-ACK information fed back corresponds to a demodulation result of a PDSCH corresponding to one PDCCH.

FIG. 3 is a flowchart of an embodiment of a method for a network device according to the present invention. The mobile communication system includes a network device and a mobile terminal. The embodiment of the method of the present invention applied to the network device specifically includes the following steps:

Step 100: The network device sends a PDCCH original set and at least one redundant PDCCH; the PDCCH original set includes a protected PDCCH; the protected PDCCH and the redundant PDCCH are used to schedule the same target PDSCH and have the same DAI field.

Further, the PDCCH original set further includes an unprotected PDCCH. The unprotected PDCCH is not protected by a corresponding redundant PDCCH. Generally, the protected PDCCH and the unprotected PDCCH are used to schedule different PDSCHs, and the DAI fields of the two are also different.

In step 100, the value of the DAI field of any one PDCCH in the PDCCH original set is determined according to the position of the any one PDCCH in the PDCCH original set;

In step 100, the values of the DAI fields of the protected PDCCH and the redundant PDCCH are determined according to the positions of the protected PDCCH in the PDCCH original set;

The position of each PDCCH (the PDCCH refers to a redundant PDCCH or a PDCCH in the PDCCH original set) refers to the position of the transmission resource occupied by the PDCCH, specifically, the serving cell index, monitoring time, and CORESET index The location identified by at least one of the bandwidth index, search space index, and CCE index. For example, in the transmission resource space formed by {serving cell, monitoring time}, a PDCCH ordering method may be, for example, that the monitoring time corresponding to the previous PDCCH is earlier; when the monitoring times corresponding to the two PDCCHs are the same, the ranking is first. The serving cell index corresponding to the PDCCH is small.

As the information shared by the network device and the terminal device, the relative position relationship between the protected PDCCH and the transmission resource occupied by the corresponding redundant PDCCH is preset (that is, according to the position of the redundant PDCCH, it may be Know the position of the protected PDCCH, and vice versa), and the protected PDCCH meets at least one of the following conditions compared to the redundant PDCCH: the smallest serving cell index, the earliest monitoring time, the smallest CORESET index, and the smallest bandwidth part index The smallest search space index and the smallest CCE index.

Step 101: The network device receives a HARQ-ACK codebook from the terminal device.

It should be noted that, in step 101, the premise of the network device receiving the HARQ-ACK codebook from the terminal device is that the terminal device completes the PDCCH processing and sends the HARQ-ACK codebook.

To achieve this, the terminal device first completes:

Searching the PDCCH original set and at least one redundant PDCCH;

Determine the number of bits of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set; the PDCCH recovery set includes a portion searched in the PDCCH original set, and also includes a recovered PDCCH; the recovered PDCCH is located in the protected The position of the PDCCH, and the DAI field of any of the redundant PDCCHs searched; according to the DAI field of any of the redundant PDCCHs, determining the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook ;

Sending the HARQ-ACK codebook.

FIG. 4 is a flowchart of an embodiment of a method for a terminal device according to the present invention. The mobile communication system includes a network device and a mobile terminal. The embodiment of the method of the present invention which is dedicated to the mobile communication system terminal device specifically includes the following steps:

Step 200: The terminal device searches for a PDCCH original set and at least one redundant PDCCH. The PDCCH original set includes a protected PDCCH. The protected PDCCH and the redundant PDCCH are used to schedule a same target PDSCH and a DAI field is the same.

Further, the PDCCH original set further includes an unprotected PDCCH. The unprotected PDCCH is protected without a corresponding redundant PDCCH. Generally, the protected PDCCH and the unprotected PDCCH are used to schedule different PDSCHs, and the DAI fields of the protected PDCCH and the unprotected PDCCH are different;

In step 200, the values of the DAI fields of the protected PDCCH and the redundant PDCCH are determined by the network device according to the positions of the protected PDCCH in the PDCCH original set;

As the information shared by the network device and the terminal device, the relative position relationship between the protected PDCCH and the transmission resources occupied by the redundant PDCCH is preset (the terminal device can know the protected PDCCH according to the position of the redundant PDCCH PDCCH position, and vice versa), the protected PDCCH and the redundant PDCCH satisfy at least one of the following conditions: the smallest serving cell index, the earliest monitoring time, the smallest CORESET index, the smallest bandwidth part index, the smallest search space index, CCE The index is the smallest.

Step 201: In the terminal device, the number of bits of the HARQ-ACK codebook is determined according to all DAI fields of the PDCCH recovery set; the PDCCH recovery set includes a part searched in the PDCCH original set, and also includes a recovered PDCCH. The restored PDCCH is located at a position of the protected PDCCH, and the restored PDCCH includes a DAI field of any one of the redundant PDCCHs searched;

E.g,

A PDCCH original set sent by a network device includes 1 protected PDCCH and N (N is a natural number, such as 8) unprotected PDCCHs; the network device also sends 2 redundant PDCCHs for the protected PDCCH; the protected PDCCH The DAI fields of the protection PDCCH and the corresponding two redundant PDCCHs are the same. The terminal device searches for the PDCCH original set and 2 redundant PDCCHs; the protected PDCCH is lost, and the terminal device searches for M (M is a natural number, such as 7) unprotected PDCCHs and 1 redundant PDCCH. The terminal device can determine a PDCCH recovery set, which includes M unprotected PDCCHs; since the transmission resources occupied by the protected PDCCH and the redundant PDCCH are preset, the terminal device can also determine that the PDCCH recovery set includes one The protected PDCCH; and the position of the transmission resource occupied by the protected PDCCH can be determined according to the position of the transmission resource occupied by the redundant PDCCH. The terminal device determines the DAI field of the protected PDCCH according to the DAI field of the redundant PDCCH that is searched, which is the same DAI field; the terminal device determines the PDSCH indicated by the redundant PDCCH that is the target, that is, the target PDSCH, determine the PDSCH scheduled by the protected PDCCH, that is, the same target PDSCH;

The terminal device determines the bit quantity and content of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set, that is, the DAI fields of the protected PDCCH and the searched DAI fields of the M unprotected PDCCHs. For example, the technical solution given in 3GPP TS 38.213 vf20 section 9.1 is used to determine the number and content of HARQ-ACK codebook bits according to all DAI fields of a PDCCH set.

Step 202: In the terminal device, according to a DAI field of any one of the redundant PDCCHs, determine an order of HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook.

E.g,

The original PDCCH set sent by the network device contains 9 PDCCHs, and the DAI field is recorded as 1/3, 2/3, 3/3, 4/5, 5/5, 6 / according to the "count DAI / total DAI". 7, 7/7, 8/9, 9/9, and the above DAI fields are determined according to the position of each PDCCH in the original set. Among them, the DAI field of the fourth PDCCH is recorded as 4/5, which is a protected PDCCH; the others are unprotected PDCCHs;

The network device also sends 2 redundant PDCCHs for the protected PDCCH, and the DAI fields are both recorded as 4/5; and both the protected PDCCH and the redundant PDCCH indicate the same target PDSCH.

The terminal device searches for the PDCCH original set and the redundant PDCCH, the protected PDCCH is lost, and the second unprotected PDCCH is lost. The terminal device searches for 7 unprotected PDCCHs, and the DAI fields are 1/3, 3/3, and 5/5. 6/7, 7/7, 8/9, 9/9. The terminal device also searches for a redundant PDCCH with a DAI field of 4/5 and determines the location of the scheduled target PDSCH. The terminal device can determine a PDCCH recovery set, including 8 PDCCHs (the first, 3 to 9 PDCCHs in the original set), of which a protected PDCCH exists at the transmission resource of the fourth PDCCH, and its DAI field is 4/5. If each HARQ-ACK message occupies 1 bit, the HARQ-ACK information corresponding to the target PDSCH is ranked as the 4th bit in the HARQ-ACK codebook; if each HARQ-ACK message occupies 2 bits, then The order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook is the seventh to eighth bits.

Step 203: The terminal device sends the HARQ-ACK codebook.

FIG. 5 is a schematic diagram of PDCCH arrangement when two PDCCHs correspond to one PDSCH. The figure shows an example when one protected PDCCH and one redundant PDCCH are used to schedule the same target PDSCH.

As an embodiment of the present invention, the protected PDCCH and the redundant PDCCH satisfy that the monitoring time corresponding to the protected PDCCH is the earliest and the serving cell index corresponding to the protected PDCCH is the smallest.

As a preferred embodiment of the present application, the protected PDCCH and the redundant PDCCH satisfy that: the monitored time corresponding to the protected PDCCH is the earliest; when the monitored time corresponding to the protected PDCCH and the redundant PDCCH are the same, The serving cell index corresponding to the protected PDCCH is the smallest.

As shown in the example of FIG. 5, the PDCCH set sent by the network device (gNB) is {PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-6, PDCCH-7, PDCCH-8, PDCCH-9 and PDCCH-10} include a total of 10 PDCCHs, including a PDCCH original set and a redundant PDCCH. {PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, PDCCH-10} are the PDCCH original set; PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, and PDCCH-10 are unprotected PDCCHs; PDCCH-4 is a protected PDCCH; PDCCH-6 is a redundant PDCCH; PDCCH-4, PDCCH- 6 is used to schedule the same target PDSCH. The values of the counting DAI and total DAI in PDCCH-6 are the same as the counting DAI and total DAI fields in PDCCH-4, respectively. That is, the location of PDCCH-4 in the PDCCH original set {PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, PDCCH-10} is determined. Count DAI = 4; According to the resource occupied by sending PDCCH-4 {serving cell, monitoring time} = {1, B}, determine the PDCCH detection time at which the protected PDCCH is cut off, that is, when monitoring time = B, the PDCCH is original Set the number of PDCCHs scheduled in the HARQ window and determine the total DAI = 5. At this time, the scheduled PDCCH includes PDCCH1 to PDCCH5. Then determine the value of the count DAI and the total DAI in PDCCH-6: count DAI = 4 and Total DAI = 5.

It should be noted that, in the embodiments of Figs. 1 to 5, both the count DAI and the total DAI are represented by decimal numbers. In a communication system, the maximum integer value range that can be represented by the bits of the count DAI and the total DAI is used as the number of cycles. For example, when both the count DAI and the total DAI are represented by 2 bits, the maximum integer that can be represented The value range is 4 (for example, from 0 to 3). At this time, the count DAI and the total DAI will be modulo according to the number of cycles 4 and expressed cyclically.

For example, the value of the count DAI or the total DAI is (all expressed in decimal):

Actual value 1 2 3 4 5 6 7 8 9

Field value

0, 1, 2, 3, 0, 1, 0

For example, when the value of the field for counting DAI or total DAI is 3, it is necessary to distinguish whether the actual value represented by it is 4 or 8.

As a further optimized embodiment of the present application, the terminal device determines the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook according to the DAI field, and / or according to all DAI fields of the PDCCH recovery set. Before the step of determining the number of bits of the HARQ-ACK codebook, modulo-cycle correction is performed on the count DAI and the total DAI of the PDCCH.

For example, according to the number of PDCCHs that have been searched before the position of the protected PDCCH, a method of performing a cyclic correction on the DAI field of the protected (restored) PDCCH is:

Actual value = field value + M × [X / M] +1 (1)

Wherein, X represents the number of PDCCHs before the position of the protected PDCCH, [.] Represents an integer, and M is the number of cycles, for example, 4.

For another example, the DAI field of the unprotected PDCCH is subjected to modulo-cyclic correction, and formula (1) is applied, where X represents the number of PDCCHs before the position of the unprotected PDCCH. FIG. 6 is a schematic diagram of sending HARQ-ACK information by a mobile terminal. According to the PDCCH set of FIG. 5, a terminal device (UE) side receives the PDCCH in sequence at monitoring times A, B, C, and D. For PDCCH-4 and PDCCH-6, there are four cases of the reception result of the terminal device. among them,

Fig. 6 (a) is a case where both the protected PDCCH and the redundant PDCCH are lost. PDCCH-4 and PDCCH-6 are not received by the UE. In this case, the UE will receive PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9 The respective count DAI and total DAI in PDCCH-10 determine O _ACK = 18, and the HARQ-ACK information fed back by the terminal device in Slot n is

among them,

Fig. 6 (b) is a case where a redundant PDCCH is lost. The UE receives only PDCCH-4 and does not receive PDCCH-6. In this case, the UE receives the received PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-7, and PDCCH- 8. The respective count DAI and total DAI in PDCCH-9 and PDCCH-10 determine O _ACK = 18, and the HARQ-ACK information fed back by the terminal device in Slot n is:

among them

HARQ-ACK response information for the PDSCH indicated by PDCCH-4.

Figure 6 (c) shows the case where the protected PDCCH is lost; the UE receives only PDCCH-6 and does not receive PDCCH-4. In this case, after receiving the PDCCH-6, the UE A preset rule for occupying resources is determined: PDCCH-4 and PDSCH indicated by PDCCH-6 are the same, and PDCCH-4 is determined to be a protected PDCCH. The UE according to the respective count DAI and total DAI of the received PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-5, PDCCH-6, PDCCH-7, PDCCH-8, PDCCH-9, and PDCCH-10, And according to {serving cell, monitoring time} where PDCCH-4 is located. It is determined that O _ACK = 18, and the HARQ-ACK information fed back by the terminal device in Slot n is:

among them

HARQ-ACK response information for PDSCH indicated by PDCCH-6.

Figure 6 (d) shows the case where both the protected PDCCH and the redundant PDCCH are received; PDCCH-4 and PDCCH-6 are both received by the UE. In this case, after the UE receives PDCCH-4 and PDCCH-6, It is determined according to a preset rule of resources occupied by the protected PDCCH and the redundant PDCCH: the PDSCH indicated by PDCCH-4 and PDCCH-6 are the same, and PDCCH-4 is determined as the protected PDCCH. The UE calculates DAI based on the respective counts of the received PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4 / PDCCH-6, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, and PDCCH-10. The total amount of DAI and the determined O _ACK = 18 according to the {serving cell, monitoring time} where PDCCH-4 is located, and the HARQ-ACK information fed back by the terminal device in Slot n are:

among them

HARQ-ACK response information for the PDSCH indicated by PDCCH-4 or PDCCH-6.

It should be noted that the terminal device may receive PDCCH-4 and PDCCH-6 separately, and may also receive PDCCH-4 and PDCCH-6 jointly by means of soft combining. According to the solution of the present invention, the terminal device determines the {serving cell, monitoring time} where the protected PDCCH is located according to the resources occupied by the preset protected PDCCH and the redundant PDCCH. Then according to the {serving cell, monitoring time} where the protected PDCC is located, determine the order of the HARQ-ACK response information of the PDSCH corresponding to the protected PDCCH in the feedback HARQ-ACK codebook, which can ensure that the terminal device determines the HARQ-ACK correctly. The size of the codebook and the ordering of the respective HARQ-ACK response information of the PDSCH scheduled in the HARQ window in the HARQ-ACK codebook ensure the reliability of URLLC and other downlink data transmissions.

FIG. 7 is a schematic diagram of a system embodiment of the present invention.

The present application further provides a terminal device for a mobile communication system, which is used in the method described in the embodiments of the present application. The terminal device includes a terminal processing module 20; the terminal processing module is configured to: search the PDCCH original set and at least one redundant Rest PDCCH; recover the protected PDCCH according to the DAI field of any redundant PDCCH, determine the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook; generate the PDCCH recovery set, and determine the HARQ -The number of bits of the ACK codebook; sending the HARQ-ACK codebook.

The present application further provides a network device for a mobile communication system, which is used in the method described in the embodiments of the present application. The network device includes a network processing module 10; the network processing module is configured to generate and send the PDCCH original set and redundancy. PDCCH, receiving the HARQ-ACK codebook.

It should be noted that, the number of bits of the HARQ-ACK codebook described in the embodiments of the present invention is used to reflect the amount of HARQ-ACK information, and the amount of information may also be expressed as "the number of bytes of the HARQ-ACK codebook", or With other units indicating the amount of information, the implementation process of the embodiment is similar to that described in each embodiment.

Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

It should also be noted that the terms "comprising," "including," or any other variation thereof are intended to encompass non-exclusive inclusion, so that a process, method, product, or device that contains a series of elements includes not only those elements, but also Other elements not explicitly listed, or elements that are inherent to such a process, method, product, or device. Without more restrictions, the elements defined by the sentence "including one ..." do not exclude the existence of other identical elements in the process, method, product or equipment containing the elements.

The above are only examples of the present application and are not intended to limit the present application. For those skilled in the art, this application may have various modifications and changes. Any modification, equivalent replacement, and improvement made within the spirit and principle of this application shall be included in the scope of claims of this application.

Claims

A data scheduling method for a mobile communication system is characterized by including the following steps:

Search the PDCCH original set and at least one redundant PDCCH; the PDCCH original set includes protected PDCCHs; the protected PDCCH and redundant PDCCHs are used to schedule the same target PDSCH and the DAI field is the same;

The number of bits of the HARQ-ACK codebook is determined according to all DAI fields of the PDCCH recovery set; the PDCCH recovery set includes a portion searched in the PDCCH original set and a recovery PDCCH, and the recovery PDCCH is located at a protected PDCCH location and includes The DAI field of any redundant PDCCH searched;

Determine the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook according to the DAI field of any one of the searched redundant PDCCHs;

Sending the HARQ-ACK codebook.
A data scheduling method for a mobile communication system is characterized by including the following steps:

Send the PDCCH original set and at least one redundant PDCCH; the PDCCH original set includes a protected PDCCH; the protected PDCCH and the redundant PDCCH are used to schedule the same target PDSCH and the DAI field is the same;

The values of the DAI fields of the protected PDCCH and the redundant PDCCH are determined according to the positions of the protected PDCCH in the PDCCH original set;

The relative position relationship between the protected PDCCH and the transmission resources occupied by the redundant PDCCH is preset; the protected PDCCH and the redundant PDCCH satisfy at least one of the following conditions: the smallest serving cell index, the earliest monitoring time, CORESET index is smallest, bandwidth part index is smallest, search space index is smallest, CCE index is smallest.
The data scheduling method for a mobile communication system according to claim 2, further comprising the following steps:

Searching the PDCCH original set and at least one redundant PDCCH;

Determine the number of bits of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set; the PDCCH recovery set includes a portion searched in the PDCCH original set and a recovery PDCCH, and the recovery PDCCH is located at the protected PDCCH position And contains the DAI field of any redundant PDCCH searched;

Determine the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook according to the DAI field of any one of the searched redundant PDCCHs;

Sending the HARQ-ACK codebook.
The method according to any one of claims 1 to 3, wherein the DAI field includes a counting DAI;

The value of the count DAI of each PDCCH in the PDCCH original set indicates the sequence number of each PDCCH in the PDCCH original set.
The method according to any one of claims 1 to 3, wherein the DAI field contains a total amount of DAI;

The value of the total DAI of each PDCCH in the PDCCH original set indicates the total number of PDCCHs scheduled in the HARQ window by the PDCCH original set as of the monitoring time at which each PDCCH is located.
The method according to any one of claims 1 to 3, wherein the protected PDCCH and the redundant PDCCH satisfy:

The monitoring moment corresponding to the protected PDCCH is the earliest, and

When the monitoring times corresponding to the protected PDCCH and the redundant PDCCH are the same, the serving cell index value corresponding to the protected PDCCH is the smallest.
The method according to any one of claims 1 to 3, wherein the PDCCH original set further includes an unprotected PDCCH.
The method according to any one of claims 1, 3 to 7, wherein, in the step of determining an order of HARQ-ACK information corresponding to the target PDSCH in a HARQ-ACK codebook according to the DAI field, and / or Before determining the number of bits of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set, the method further includes the following steps: According to the number of PDCCHs that have been searched before the position of the protected PDCCH, The DAI field performs modulo loop correction.
A mobile communication system terminal device used for the method according to claim 1 or 3, characterized in that it comprises a terminal processing module;

The terminal processing module,

Searching the PDCCH original set and at least one redundant PDCCH;

Recovering the protected PDCCH according to the searched DAI field of any redundant PDCCH, and determining the order of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook;

Generating the PDCCH recovery set, and determining the number of bits of the HARQ-ACK codebook;

Sending the HARQ-ACK codebook.
A network device for a mobile communication system, which is used in the method according to claim 2 or 3, and comprises a network processing module;

The network processing module is configured to generate and send the PDCCH original set and the redundant PDCCH, and receive the HARQ-ACK codebook.
A mobile communication system, comprising the terminal device according to claim 9 and the network device according to claim 10.