CN110061816A - A kind of mobile communication system, the network equipment, terminal device and data dispatching method - Google Patents

Abstract

The present application discloses a mobile communication system, network equipment, terminal equipment and data scheduling method. The data scheduling method includes the following steps: searching 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 is 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 the DAI fields of the PDCCH recovery set; the corresponding target PDSCH is determined according to the DAI field of the at least one redundant PDCCH ordering of the HARQ-ACK information in the HARQ-ACK codebook; sending the HARQ-ACK codebook. The present application also includes a mobile communication network device, terminal device and system applying the method. Using the dynamic HARQ-ACK codebook determined by the ordering method of DAI in the downlink control channel in the present invention satisfies the time delay and efficiency requirements of uplink control information transmission in the NR system.

Description

A mobile communication system, network equipment, terminal equipment and data scheduling method

technical field

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

Background technique

In the NR technology, the network equipment schedules the Physical Downlink Shared Channel (PDSCH) for transmitting downlink information and the Physical Uplink Shared Channel (PUSCH) for the terminal equipment (UE) to send uplink information through the Physical Downlink Control Channel (PDCCH). The terminal equipment sends acknowledgement (ACK) or non-acknowledgement (NACK) information of the reception of downlink service data to the network equipment, so that the network equipment can determine whether to reschedule the downlink service data or to schedule the channel downlink service data to the terminal equipment. The ACK and NACK information are collectively referred to as Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK).

When the network device only sends the PDCCH to the terminal device on a part of the downlink channels in the "HARQ feedback window", using the HARQ-ACK dynamic codebook determination method, the terminal device only feeds back the corresponding HARQ-ACK information for the downlink channel on which the PDCCH is received. In an actual system, the terminal equipment may lose some downlink control information (DCI). The Downlink Assignment Index (DAI) field in the PDCCH can be used to determine the lost PDCCH and feed back NACK at the position corresponding to the lost PDCCH. information. Section 9.1 of 3GPP TS 38.213vf20 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 the URLLC service, the PDCCH is repeatedly sent multiple times corresponding to the same PDSCH to improve the reliability of the control channel. The multiple times of PDCCHs have different transmission time resources, different transmission frequency resources, or different transmission time and frequency resources. When the PDCCH is repeatedly sent, information redundancy is caused, which reduces the efficiency of the HARQ-ACK response between the terminal device and the network device.

SUMMARY OF THE INVENTION

The present application provides a mobile communication system, network equipment, terminal equipment and data scheduling method, aiming to solve the problem of how to efficiently perform hybrid automatic repeat request response between network equipment and terminal equipment when multiple PDCCHs correspond to the same PDSCH.

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

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

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

According to the searched DAI field of any redundant PDCCH, determine the ordering of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook;

The HARQ-ACK codebook is sent.

The present application also provides a data scheduling method for a mobile communication system, which is used in a network device of the mobile communication system, comprising the following steps:

Send 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;

The value of the DAI field of the protected PDCCH and the redundant PDCCH is determined according to the position of the protected PDCCH in the original PDCCH set;

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

Preferably, the DAI field contains count DAI; the value of count DAI of each PDCCH in the original PDCCH set represents the sequence number of each PDCCH in the original PDCCH set.

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

Preferably, a comparison between the protected PDCCH and the redundant PDCCH satisfies: 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 of is the smallest.

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

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

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

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

The above-mentioned 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 how to determine the size of the HARQ-ACK codebook and the PDSCH when multiple PDCCH transmissions correspond to the same PDSCH in the case of improving the transmission performance of the protected PDCCH through redundant PDCCH. The problem of ordering in the HARQ-ACK codebook. By adopting the scheme of the present invention, the efficiency of HARQ-ACK feedback can be improved, and the performance requirements of the PDCCH can be met at the same time.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is an example of count DAI and total DAI value in DCI under the carrier aggregation scenario of the prior art;

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

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

FIG. 4 is a flowchart of an embodiment of the method of the present invention applied to a terminal device;

5 is a schematic diagram of the arrangement of PDCCHs when 2 PDCCHs correspond to 1 PDSCH;

FIG. 6 is a schematic diagram of a mobile terminal sending HARQ-ACK information, wherein

Figure 6(a) shows the situation in which both the protected PDCCH and the redundant PDCCH are lost;

Figure 6(b) shows the situation in which the protected PDCCH is lost;

Figure 6(c) shows the situation in which the redundant PDCCH is lost;

Figure 6(d) shows the situation 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 ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those 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 times of PDCCHs, the K times of PDCCHs have different transmission time resources, different transmission frequency resources, or different transmission time and frequency resources. There is no prior art solution for how to determine the DAI field in the K times of PDCCH and how to determine the position of the HARQ-ACK information of the PDSCH corresponding to the K times of PDCCH in the HARQ-ACK codebook information.

In the solution of the present invention, the value of DAI in the K times of PDCCH is determined according to the location of the first PDCCH (that is, the protected PDCCH); PDCCH) to determine the location of the protected PDCCH, determine the codebook size of the HARQ-ACK fed back according to the DAI field in the received PDCCH, and determine the feedback information of the HARQ-ACK of the PDSCH indicated by the redundant PDCCH in the HARQ-ACK Ordering in the ACK codebook. Here, the location where the protected PDCCH is located refers to the location of the transmission resources of the protected PDCCH. , the position identified by at least one item in 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 accompanying drawings.

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

The DAI field includes "count DAI"; the value of the count DAI of each PDCCH in the original PDCCH set represents the sequence number of each PDCCH in the original PDCCH set.

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

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

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

In an embodiment of the mobile communication system, the DAI field in the format 1 of the PDCCH (denoted as DCI format 1_0) includes a 2-bit count DAI. In PDCCH format 2 (referred to as DCI format 1_1), the DAI field includes a 2-bit count DAI when the terminal device is configured to serve one cell; the DAI field includes 2 when the terminal device is configured to serve more than one cell. The count of bits DAI and the total amount of 2 bits DAI. Specifically, the value of the count DAI in DCI format 1_0 and DCI format 1_1 is based on the position of the current PDCCH in the space of {serving cell, PDCCH monitoring time} (in this application document, "PDCCH monitoring time" or simply "monitoring time" ), first according to the serving cell index, and then according to the order of the monitoring time index from low to high, and then count the serial number obtained. The value of the total DAI in PDCCH format 1_1 is updated according to the granularity of each monitoring moment, and the value is the number of PDCCHs sent by the current monitoring moment. In Figure 1, taking carrier aggregation of 3 cells (Cells), count DAI and total DAI each include 2 bits as an example, for example, "4" in "4/5" represents count DAI, and "5" represents total DAI.

It should be noted that the original PDCCH set consists of unprotected PDCCH and protected PDCCH, that is, the PDCCH in the original PDCCH set is divided into two types: unprotected PDCCH and protected PDCCH; The number of protected PDCCHs is 0; the protected PDCCH means that there is at least one redundant PDCCH corresponding to it, but the redundant PDCCH is not included in the original set of PDCCHs.

FIG. 2 is a schematic diagram of HARQ-ACK information. In an embodiment of the present application, the value of the count 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 one PDSCH scheduling. According to the value of the count DAI in DCI format 1_0/DCI format1_1, the terminal device can determine that the HARQ-ACK of its corresponding PDSCH is in the 0 _ACK bit HARQ-ACK information specific location. Taking the original PDCCH set in Fig. 1 as an example, if the terminal device does not receive the high-level configuration signaling "PUCCH HARQ-ACK spatial bundle", 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 at Slot n is:

If the terminal device receives the high-level configuration signaling "PUCCH HARQ-ACK spatial bundle", 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 the fed back HARQ-ACK information corresponds to a PDSCH demodulation result corresponding to one PDCCH.

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

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

Further, the original set of PDCCHs also includes unprotected PDCCHs. The unprotected PDCCH has no corresponding redundant PDCCH to protect. Generally, the protected PDCCH and the unprotected PDCCH are used for scheduling different PDSCHs, and the DAI fields of the two are also different.

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

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

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

As the information shared by the network device and the terminal device, the relative positional relationship between the protected PDCCH and the transmission resources occupied by the corresponding redundant PDCCH is preset (that is, according to the position of the redundant PDCCH, it can be Knowing the position of the protected PDCCH, and vice versa), and comparing the protected PDCCH with the redundant PDCCH, it satisfies at least one of the following conditions: the minimum serving cell index, the earliest monitoring time, the minimum CORESET index, and the minimum bandwidth part index , the search space index is the smallest, and the CCE index is the smallest.

Step 101: The network device receives the 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 original set of PDCCHs and at least one redundant PDCCH;

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

The HARQ-ACK codebook is sent.

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

Step 200, the terminal equipment searches for the original PDCCH set and at least one redundant PDCCH; the PDCCH original set includes the 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 original set of PDCCHs also includes unprotected PDCCHs. The unprotected PDCCH has no corresponding redundant PDCCH to realize protection. Generally, the protected PDCCH and the unprotected PDCCH are used for scheduling different PDSCHs, and the DAI fields of the protected PDCCH and the unprotected PDCCH are different;

In step 200, the value of the DAI field of the protected PDCCH and the redundant PDCCH is determined by the network device according to the position of the protected PDCCH in the original PDCCH set;

As the information shared by the network device and the terminal device, the relative positional 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 The position of the PDCCH, and vice versa), the protected PDCCH and the redundant PDCCH satisfy at least one of the following conditions: the minimum serving cell index, the earliest monitoring time, the minimum CORESET index, the minimum bandwidth part index, the minimum search space index, and the CCE Index is the smallest.

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

E.g,

A PDCCH original set sent by the 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 DAI fields of the protection PDCCH and the corresponding two redundant PDCCHs are the same. The terminal equipment searches for the original set of PDCCHs and 2 redundant PDCCHs; the protected PDCCH is lost, and the terminal equipment 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, and the PDCCH recovery set 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 1 protected PDCCH; and according to the position of the transmission resource occupied by the redundant PDCCH, the position of the transmission resource occupied by the protected PDCCH can be determined. The terminal device determines the DAI field of the protected PDCCH according to the DAI field of the searched redundant PDCCH, which is the same DAI field; the terminal device determines the PDSCH indicated by the searched redundant PDCCH, that is, the target PDSCH, determine the PDSCH scheduled by the protected PDCCH, that is, the same target PDSCH;

The terminal device determines the number of bits and content of the HARQ-ACK codebook according to all the DAI fields of the PDCCH recovery set, that is, the DAI fields of the protected PDCCH and the DAI fields of the M unprotected PDCCHs searched for. For example, adopt the technical solution given in Section 9.1 of 3GPP TS38.213 vf20 to determine the number and content of HARQ-ACK codebook bits according to all the DAI fields of a PDCCH set.

Step 202, in the terminal equipment, according to the DAI field of any redundant PDCCH, determine the ordering of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook;

E.g,

The original set of PDCCH sent by the network device contains 9 PDCCHs, and the DAI field is recorded as "count DAI/total DAI" as: 1/3, 2/3, 3/3, 4/5, 5/5, 6/ 7, 7/7, 8/9, 9/9, 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 marked as 4/5, which is a protected PDCCH; the others are unprotected PDCCH;

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

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

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

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

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

As the best embodiment of the present application, the protected PDCCH and the redundant PDCCH satisfy: the monitoring time corresponding to the protected PDCCH is the earliest; when the monitoring time corresponding to the protected PDCCH and the redundant PDCCH is the same, The serving cell index value corresponding to the protected PDCCH is the smallest.

As shown in Figure 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, PDCCH-10} have a total of 10 PDCCHs, including the original set of PDCCHs and redundant PDCCHs. {PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, PDCCH-10} are the original PDCCH sets; PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, PDCCH-10 are unprotected PDCCH; PDCCH-4 is protected PDCCH; PDCCH-6 is redundant PDCCH; PDCCH-4, PDCCH- 6 is used to schedule the same target PDSCH. The values of count DAI and total DAI in PDCCH-6 are the same as the count DAI and total DAI fields in PDCCH-4, respectively. That is, it is determined according to the position of PDCCH-4 in the original PDCCH set {PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, PDCCH-5, PDCCH-7, PDCCH-8, PDCCH-9, PDCCH-10} Counting 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 located, that is, when monitoring time=B, the PDCCH original Set the number of PDCCHs scheduled in the HARQ window, and determine the total DAI=5. At this time, the scheduled PDCCHs include PDCCH1 to PDCCH5; then determine the values of count DAI and 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 the communication system, the maximum integer value range that can be represented by the bits of the count DAI and the total amount DAI is taken as the number of cycles. For example, when both the count DAI and the total amount DAI are represented by 2 bits, the maximum integer value 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 4 according to the cycle number, and the cycle is expressed.

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

Actual value 1 2 3 4 5 6 7 8 9 10

Field value 0 1 2 3 0 1 2 3 0 1

For example, when the field value of count 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 ordering 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 the DAI fields of the PDCCH recovery set Before the step of determining the number of bits of the HARQ-ACK codebook, modulo cyclic correction is performed on the count DAI and total DAI of the PDCCH.

For example, according to the number of PDCCHs that have been searched before the position of the protected PDCCH, the method for performing modulo 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, modulo cyclic correction is performed on the DAI field of the unprotected PDCCH, 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 a mobile terminal sending HARQ-ACK information. According to the PDCCH set in FIG. 5 , the terminal equipment (UE) side receives the PDCCH at monitoring times A, B, C, and D in sequence. For PDCCH-4 and PDCCH-6, there are four cases of reception results of the terminal equipment. in,

Figure 6(a) shows the situation where both the protected PDCCH and the redundant PDCCH are lost. Neither PDCCH-4 nor PDCCH-6 has been 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 according to the received PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-5 , 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 in,

Figure 6(b) shows the situation in which the redundant PDCCH is lost. The UE only receives PDCCH-4, but does not receive PDCCH-6. In this case, the UE according to the received PDCCH-1, PDCCH-2, PDCCH-3, PDCCH-4, 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 at Slot n is: in HARQ-ACK response information for PDSCH indicated by PDCCH-4.

Figure 6(c) shows the situation in which the protected PDCCH is lost; the UE only receives PDCCH-6 and does not receive PDCCH-4. In this case, after the UE receives PDCCH-6, it will The preset rules for occupying resources are determined: the PDSCHs indicated by PDCCH-4 and PDCCH-6 are the same, and PDCCH-4 is determined as a protected PDCCH. 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, the UE, And according to the {serving cell, monitoring time} where the PDCCH-4 is located. It is determined that O _ACK = 18, and the HARQ-ACK information fed back by the terminal device at Slot n is: in HARQ-ACK response information for PDSCH indicated by PDCCH-6.

Figure 6(d) shows the situation where both the protected PDCCH and the redundant PDCCH are received; both PDCCH-4 and PDCCH-6 are 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 PDSCHs indicated by PDCCH-4 and PDCCH-6 are the same, and it is determined that PDCCH-4 is the protected PDCCH. The UE counts DAI and PDCCH-10 according to the received respective count DAI and The total amount of DAI, and O _ACK = 18 is determined according to the {serving cell, monitoring time} where PDCCH-4 is located, and the HARQ-ACK information fed back by the terminal device at Slot n is:

in 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, or may jointly receive PDCCH-4 and PDCCH-6 in a soft combining manner. 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 correctly determines the HARQ-ACK The size of the codebook and the ordering of the respective HARQ-ACK response information of the PDSCHs 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 of 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 for the PDCCH original set and at least one redundant Remaining PDCCH; recover the protected PDCCH according to the DAI field of any redundant PDCCH, and determine the ordering of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook; generate the PDCCH recovery set, determine the HARQ - the number of bits of the ACK codebook; the HARQ-ACK codebook is sent.

The present application further provides a mobile communication system network device, 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, receive the HARQ-ACK codebook.

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

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

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, CD-ROM, optical storage, and the like.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion, such that a process, method, article of manufacture or device comprising a series of elements includes not only those elements, but also There are no other elements expressly listed or inherent to this process, method, article of manufacture or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device containing the element.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (11)

1. A data scheduling method in a mobile communication system, comprising the steps of:

searching a PDCCH original set and at least one redundant PDCCH; the PDCCH original set comprises a protected PDCCH; the protected PDCCH and the redundant PDCCH are used for scheduling the same target PDSCH, and DAI fields are the same;

determining the bit number of an HARQ-ACK codebook according to all DAI fields of a PDCCH recovery set; the PDCCH recovery set comprises a part searched in the PDCCH original set and a recovery PDCCH, and the recovery PDCCH is positioned at the position of a protected PDCCH and comprises a DAI field of any one searched redundant PDCCH;

determining the sequence of HARQ-ACK information corresponding to the target PDSCH in an HARQ-ACK codebook according to the searched DAI field of any one redundant PDCCH;

and transmitting the HARQ-ACK codebook.

2. A data scheduling method in a mobile communication system, comprising the steps of:

transmitting a PDCCH original set and at least one redundant PDCCH; the PDCCH original set comprises a protected PDCCH; the protected PDCCH and the redundant PDCCH are used for scheduling the same target PDSCH, and DAI fields are the same;

the value of the DAI field of the protected PDCCH and the redundant PDCCH is determined according to the position of the protected PDCCH in the original PDCCH set;

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

3. The method for scheduling data in a mobile communication system according to claim 2, further comprising the steps of:

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

determining the bit number of an HARQ-ACK codebook according to all DAI fields of a PDCCH recovery set; the PDCCH recovery set comprises a part searched in the PDCCH original set and a recovery PDCCH, and the recovery PDCCH is positioned at the position of the protected PDCCH and comprises a DAI field of any one searched redundant PDCCH;

determining the sequence of HARQ-ACK information corresponding to the target PDSCH in an HARQ-ACK codebook according to the searched DAI field of any one redundant PDCCH;

and transmitting the HARQ-ACK codebook.

4. The method according to any of claims 1 to 3, wherein the DAI field contains a count DAI;

and the value of the counting DAI of each PDCCH in the PDCCH original set represents the sequence number of each PDCCH in the PDCCH original set.

5. The method according to any of claims 1 to 3, wherein the DAI field contains a total amount of DAI;

and the value of the total DAI of each PDCCH in the PDCCH original set represents the total number of PDCCHs scheduled in the HARQ window by the PDCCH original set at the monitoring time of each PDCCH.

6. The method of any one of claims 1 to 3, wherein the protected PDCCH satisfies, as compared with the redundant PDCCH:

the monitoring time corresponding to the protected PDCCH is earliest, and

and when the monitoring time corresponding to the protected PDCCH and the monitoring time corresponding to the redundant PDCCH are the same, the index value of the service cell corresponding to the protected PDCCH is minimum.

7. The method of any one of claims 1 to 3, wherein the original set of PDCCHs further comprises an unprotected PDCCH.

8. The method as claimed in any one of claims 1 and 3 to 7, wherein before the step of determining the ordering of the HARQ-ACK information corresponding to the target PDSCH in the HARQ-ACK codebook according to the DAI field and/or the step of determining the number of bits of the HARQ-ACK codebook according to all DAI fields of the PDCCH recovery set, the method further comprises the following steps: and performing modular cycle correction on the DAI field of the redundant PDCCH according to the number of PDCCHs which are searched before the position of the protected PDCCH.

9. A mobile communication system terminal device for use in the method of claim 1 or 3, comprising a terminal processing module;

the terminal processing module is used for

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

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

generating the PDCCH recovery set, and determining the bit number of an HARQ-ACK codebook;

and transmitting the HARQ-ACK codebook.

10. A mobile communication system network device for use in the method of claim 2 or 3, comprising a network processing module;

and the network processing module is used for generating and sending the PDCCH original set and the redundant PDCCH and receiving the HARQ-ACK codebook.

11. A mobile communication system comprising the terminal device of claim 9 and the network device of claim 10.