CN117322110A

CN117322110A - Information retransmission method, device, equipment and storage medium

Info

Publication number: CN117322110A
Application number: CN202180098091.5A
Authority: CN
Inventors: 马腾; 张世昌; 赵振山; 林晖闵
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-12-29
Also published as: WO2023010575A1

Abstract

The application discloses an information retransmission method, an information retransmission device, information retransmission equipment and a storage medium, and relates to the technical field of communication, wherein the information retransmission method comprises the following steps: transmitting first downlink indication information to at least one terminal, wherein the first downlink indication information is used for indicating the at least one terminal to activate or release a semi-persistent scheduling (SPS); and under the condition that the first terminal does not receive the first downlink indication information, sending second downlink indication information to the first terminal, wherein the second downlink indication information is used for indicating the first terminal to activate or release the SPS, and the first terminal is one or more of the at least one terminal.

Description

Information retransmission method, device, equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information retransmission method, apparatus, device, and storage medium.

Background

In a fifth generation mobile communication technology (5th Generation,5G) communication system, a transmission scheme of Semi-persistent scheduling (Semi-Persistent Scheduling, SPS) is developed in order to balance the utilization of transmission resources and resources consumed for transmission of control information. However, before transmitting data between the terminal and the base station in the SPS transmission mode, the base station needs to issue downlink control information (Uplink Control Information, DCI) to the terminal, and activate SPS based on the DCI, so that the subsequent terminal can transmit and receive data in the SPS process.

Disclosure of Invention

The embodiment of the application provides an information retransmission method, device, equipment and storage medium. The technical scheme is as follows:

according to an aspect of the embodiments of the present application, there is provided an information retransmission method, applied to a network device, the method including:

transmitting first downlink indication information to at least one terminal, wherein the first downlink indication information is used for indicating the at least one terminal to activate or release a semi-persistent scheduling (SPS);

and under the condition that the first terminal does not receive the first downlink indication information, sending second downlink indication information to the first terminal, wherein the second downlink indication information is used for indicating the first terminal to activate or release the SPS, and the first terminal is one or more of the at least one terminal.

and sending downlink indication information to at least one terminal according to the blind retransmission times, wherein the downlink indication information is used for indicating the at least one terminal to activate or release to change the semi-persistent scheduling SPS, and the blind retransmission times are integers larger than 1.

According to an aspect of the embodiments of the present application, there is provided an information retransmission method, applied to a terminal, the method including:

receiving a plurality of downlink indication information sent by network equipment, wherein the downlink indication information is used for indicating the terminal to activate or release a semi-persistent scheduling (SPS), and the plurality of downlink indication information is sent by the network equipment based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information;

and activating or releasing the SPS based on target downlink indication information, wherein the target downlink indication information is one of the downlink indication information.

According to an aspect of the embodiments of the present application, there is provided an information retransmission apparatus, including:

a first sending module, configured to send first downlink indication information to at least one terminal, where the first downlink indication information is used to indicate the at least one terminal to activate or release a semi-persistent scheduling SPS;

the second sending module is configured to send second downlink indication information to the first terminal when it is determined that the first terminal does not receive the first downlink indication information, where the second downlink indication information is used to instruct the first terminal to activate or release the SPS, and the first terminal is one or more of the at least one terminal.

the fourth sending module is configured to send downlink indication information to at least one terminal according to the number of blind retransmission, where the downlink indication information is used to instruct the at least one terminal to activate or release to change the SPS, and the number of blind retransmission is an integer greater than 1.

the first receiving module is used for receiving a plurality of downlink indication information sent by the network equipment, wherein the downlink indication information is used for indicating the terminal to activate or release the semi-persistent scheduling SPS, and the plurality of downlink indication information is sent by the network equipment based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information;

the processing module is used for activating or releasing the SPS based on target downlink indication information, wherein the target downlink indication information is one of the downlink indication information.

According to an aspect of embodiments of the present application, there is provided a network device including: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the information retransmission method as described in the above aspect.

According to an aspect of embodiments of the present application, there is provided a terminal including: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the information retransmission method as described in the above aspect.

According to an aspect of the embodiments of the present application, there is provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by the processor to implement the information retransmission method as described in the above aspect.

According to an aspect of the embodiments of the present application, there is provided a computer program product, in which executable instructions are stored, which are loaded and executed by the processor to implement the information retransmission method as described in the above aspect.

According to an aspect of the embodiments of the present application, there is provided a chip for executing to implement the information retransmission method as described in the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

In the embodiment of the application, in the scenario that the downlink indication information is used for activating or releasing the SPS, the network device retransmits the downlink indication information to the first terminal under the condition that the first terminal does not receive the downlink indication information, so that the reliability of receiving the downlink indication information is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an architecture diagram of a communication system provided in one exemplary embodiment of the present application;

fig. 2 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

fig. 3 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 4 is a flow chart of a method of information retransmission provided in an exemplary embodiment of the present application;

fig. 5 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 6 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

FIG. 7 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

FIG. 8 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

FIG. 9 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

fig. 10 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 11 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

fig. 12 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

fig. 13 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 14 is a diagram of information retransmission provided by an exemplary embodiment of the present application;

fig. 15 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

fig. 16 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

fig. 17 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 18 is an illustration of information retransmission provided by an exemplary embodiment of the present application;

Fig. 19 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

FIG. 20 is an illustration of information retransmission provided by an exemplary embodiment of the present application;

FIG. 21 is an illustration of information retransmission provided by an exemplary embodiment of the present application;

fig. 22 is a flowchart of an information retransmission method provided in an exemplary embodiment of the present application;

fig. 23 is a block diagram of an information retransmission apparatus provided in an exemplary embodiment of the present application;

fig. 24 is a block diagram of an information retransmission apparatus provided in an exemplary embodiment of the present application;

fig. 25 is a block diagram of an information retransmission apparatus provided in an exemplary embodiment of the present application;

fig. 26 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic architecture of a communication system according to an embodiment of the present application. The communication system may include: a terminal 10 and a network device 20.

The terminal 10 is within a cell managed by the network device 20 and one or more terminals 10 are distributed within the cell managed by the access device, i.e. the number of terminals 10 is one or more. The terminal 10 may include various handheld devices, vehicle mount devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile Station (MS), and the like, having wireless communication capabilities. For convenience of description, in the embodiments of the present application, the above-mentioned devices are collectively referred to as a terminal 10. In the embodiments of the present application, some places use "UE" to represent "terminal 10".

The network device 20 is a device for providing wireless communication services to the terminal 10. The network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. The names of base station-capable devices may vary in systems employing different Radio access technologies, such as in 5G Radio air-interface (NR) systems, known as 5G base stations (gndeb or gNB). As communication technology evolves, the name "base station" may change. For convenience of description, in the embodiment of the present application, the above-mentioned devices for providing wireless communication services to the terminal 10 are collectively referred to as a network device 20.

The technical solution described in the embodiments of the present application may be applied to a long term evolution (Long Term Evolution, LTE) system, a 5G NR system, a subsequent evolution system of the 5G NR system, or other communication systems, which is not limited in the embodiments of the present application.

Fig. 2 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. The present embodiment is performed by a network device. The method comprises the following steps:

step 201: and sending first downlink indication information to at least one terminal, wherein the first downlink indication information is used for indicating the at least one terminal to activate or release the semi-persistent scheduling SPS.

Data transmission is carried out between the network equipment and the terminal based on the SPS mode; before transmitting data between the network device and the terminal, the network device sends first downlink indication information to the terminal, wherein the first downlink indication information is used for indicating the terminal to activate SPS, and then data is transmitted based on SPS. The first downlink indication information carries an identification of the SPS to be activated.

And when the network equipment exits the transmission mode, the network equipment sends first downlink indication information to the terminal, wherein the first downlink indication information is used for indicating the terminal to release the SPS, and the first downlink indication information carries an identification of the SPS to be released.

The first downlink indication information may be any information capable of indicating the terminal to activate SPS; for example, the first downlink indication information may be DCI or media access control (Media Access Control, MAC) information, etc., and may also be indication information in a subsequent evolution system or other communication systems, and in this embodiment of the present application, the specific form of the first downlink indication information is not specifically limited.

Step 202: and under the condition that the first terminal does not receive the first downlink indication information, sending second downlink indication information to the first terminal, wherein the second downlink indication information is used for indicating the first terminal to activate or release SPS, and the first terminal is one or more of at least one terminal.

The second downlink indication information carries an identification of an SPS to be activated or an identification of an SPS to be released, and the content carried by the second downlink indication information and the content carried by the first downlink indication information are the same or different.

Fig. 3 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. The present embodiment is performed by a network device. The method comprises the following steps:

step 301: and sending downlink indication information to at least one terminal according to the blind retransmission times, wherein the downlink indication information is used for indicating the at least one terminal to activate or release to change the semi-persistent scheduling SPS, and the blind retransmission times are integers larger than 1.

The blind retransmission times can be set and changed according to the needs, and in the embodiment of the application, the blind retransmission times are not particularly limited; for example, the number of blind retransmissions may be 2, 3, 4, or 5, etc. In addition, the interval between each downlink indication information of the blind retransmission may be set and changed as required, and in the embodiment of the present application, the interval is not specifically limited; for example, the intervals may be the same or different.

The network device sends the downlink indication information of blind retransmission times successively, and the downlink indication information sent each time is independent and does not depend on other downlink indication information.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating or releasing the SPS, the downlink indication information is sent to at least one terminal in a blind retransmission mode, so that the receiving reliability of the downlink indication information is improved.

Fig. 4 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. The present embodiment is performed by a terminal. The method comprises the following steps:

step 401: receiving a plurality of downlink indication information sent by network equipment, wherein the downlink indication information is used for indicating a terminal to activate or release a semi-persistent scheduling (SPS), and the plurality of downlink indication information is sent by the network equipment based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information.

When the terminal starts the feedback of the downlink indication information, the terminal sends feedback information to the network equipment after receiving the downlink indication information, and the network equipment determines whether the terminal receives the sent downlink indication information or not based on the feedback information, so as to retransmit the downlink indication information; and under the condition that the terminal does not start the feedback of the downlink indication information, the terminal receives a plurality of downlink indication information sent by the network equipment according to the blind retransmission times.

Step 402: and activating or releasing the SPS based on the target downlink indication information, wherein the target downlink indication information is one of a plurality of downlink indication information.

The target downlink indication information is the first downlink indication information in the plurality of downlink indication information; or alternatively, the first and second heat exchangers may be,

the target downlink indication information is the last downlink indication information in the downlink indication information; or alternatively, the first and second heat exchangers may be,

the target downlink indication information is any one downlink indication information among a plurality of downlink indication information; or alternatively, the first and second heat exchangers may be,

and if the content carried by the plurality of downlink indication information is the same, the target downlink indication information is the downlink indication information obtained by combining the plurality of downlink indication information.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating or releasing the SPS, the terminal receives a plurality of downlink indication information sent by the network device, so that the receiving reliability of the downlink control information is improved.

Fig. 5 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to activate SPS, and the terminal has a feedback mechanism, and the terminal works in a multicast scenario, a broadcast scenario, and/or a multicast scenario for example. The method comprises the following steps:

Step 501: the network device sends a first downlink indication information shared by the group to at least one terminal on a physical downlink control channel (Physical Downlink Control Channel, PDCCH), the first downlink indication information being used to instruct the at least one terminal to activate SPS.

The first downlink indication information may be any information capable of indicating the terminal to activate SPS; for example, the first downlink indication information may be DCI, MAC information, or the like, and the first downlink indication information may also be indication information in a subsequent evolution system or other communication systems, and in this embodiment of the present application, a specific form of the first downlink indication information is not specifically limited. For example, referring to fig. 6, the first downlink indication information is first DCI, where the first DCI is initial activation DCI for indicating that the terminal activates SPS1, and the first DCI carries an identifier of SPS 1.

The first downlink indication information shared by the groups means that at least one terminal shares the first downlink indication information; in case that at least one terminal works in a multicast scene, a multicast scene and/or a broadcast scene, the at least one terminal can be built, the at least one terminal is a terminal of the same group; at least one terminal may also not be set up, i.e. without the concept of a set.

It should be noted that, the PDCCH for transmitting the first downlink indication information of Group sharing may be referred to as a Group-shared downlink control channel (GC-PDCCH), where the network device uses the GC-PDCCH to transmit the first downlink indication information of Group sharing, that is, the network device transmits one first downlink indication information, and the receiving target of the first downlink indication information is at least one terminal. In the embodiment of the application, the first downlink indication information shared by the groups is sent to at least one terminal, so that downlink resources and scheduling signaling overhead can be saved.

In this embodiment of the present application, the terminal has a feedback mechanism, that is, the terminal can send feedback information to the network device to inform the network device of the receiving condition of the terminal for the first downlink indication information. Therefore, the first downlink indication information is further used for indicating uplink resources for the terminal to send feedback information to the network device. Each terminal may have a dedicated uplink resource, or at least one terminal may share an uplink resource set. And under the condition that each terminal has special uplink resources, the first downlink indication information carries first indication information of the special uplink resources of each terminal, and the uplink resources are used for the terminal to send feedback information to the network equipment. The uplink resource may be a physical uplink control channel (Physical Uplink Control Channel, PUCCH) or a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH). The first indication information is used for indicating the resource position of the uplink resource, and the first indication information may be an information field F1. For example, if the uplink resource is a PUCCH, the first downlink indication information carries F1, where F1 is used to indicate a resource location of the PUCCH, so that the terminal sends feedback information to the network device on the PUCCH based on the resource location of the PUCCH.

The first downlink indication information carries a P-bit information field, and the P-bit information field is used for indicating a resource position of a time domain and a resource position of a frequency domain of an uplink resource dedicated to the terminal, so that the terminal determines the uplink resource dedicated to the terminal based on the resource position of the time domain and the resource position of the frequency domain. Or the first downlink indication information carries a Q-bit information field, where the Q-bit information field is used to indicate a resource location of a time domain of an uplink resource dedicated to the terminal, and the resource location of the frequency domain can be configured through radio resource control (Radio Resource Control, RRC) signaling. Or the first downlink indication information carries Q bit information and P bit information fields, and is used for indicating the time domain resource position and the frequency domain resource position of the uplink resource special for the terminal respectively. The dedicated uplink resource configured by the network device for the terminal is one uplink resource in an uplink resource set, where the uplink resource set may be divided into a plurality of subsets, and each subset includes at least one uplink resource. The network equipment configures the resource position of the frequency domain of the special uplink resource for each terminal through RRC signaling. For example, referring to fig. 7, the network device sends first DCI on PDCCH1 to the terminal, where the first DCI is initial active DCI, the uplink resource set includes 20 uplink resources, respectively PUCCH1-PUCCH20, and the network device instructs, through RRC signaling, the terminal to use which uplink resource of the 20 uplink resources to send feedback information.

The point to be described is that the time slot interval between the time slot where the PDCCH for transmitting the first downlink indication information is located and the time slot where the dedicated uplink resource of the terminal is located is greater than the preset time slot, so that the terminal is guaranteed to have enough time to transmit feedback information on the dedicated uplink resource of the terminal. For example, referring to fig. 8, the network device sends first downlink indication information to the terminal on PDCCH1, there are two available uplink resources, UL1 and UL2, respectively, and since the time slot interval a between UL1 and PDCCH1 is smaller than the preset time slot, and the time slot interval b between UL2 and PDCCH1 is greater than the preset time slot, the dedicated uplink resource configured by the network device to the terminal is UL2.

And under the condition that at least one terminal shares one uplink resource set, carrying second indication information of the uplink resource set in the first downlink indication information, wherein the uplink resource set is used for at least one terminal to send feedback information to the network equipment. And the uplink resource set comprises M uplink resources, and the number of at least one terminal is N, wherein M and N are positive integers, and M is not more than N. In the embodiment of the present application, since M is set to be not greater than N, fewer uplink resources may be set for more terminals to use, so that uplink resources may be saved.

The other point to be described is that the first downlink indication information also carries a first timeslot offset and/or a first hybrid retransmission request Process identifier (HARQ Process ID, HPID offset; the first timeslot offset is a timeslot offset of a PDCCH carried by the first downlink indication information, that is, a timeslot offset between the PDCCH and a PUSCH for transmitting data.

Another point to be noted is that the first downlink indication information also carries a resource location of a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) for transmitting data, so that the terminal receives data on the PDSCH based on the resource location of the PDSCH.

Step 502 is performed for each of the at least one terminal.

Step 502: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

In the case that the first downlink indication information carries first indication information of uplink resources dedicated to the terminal, the step of sending feedback information to the network device by the terminal includes: and the terminal sends feedback information to the network equipment on the uplink resources special for the terminal based on the first indication information. In the case that the first downlink indication information carries the second indication information of the uplink resource set, the step of sending feedback information to the network device by the terminal includes: and the terminal sends feedback information to the network equipment on any uplink resource in the uplink resource set based on the second indication information.

Under the condition that the terminal does not receive the first downlink indication information, the terminal does not send feedback information to the network equipment; and under the condition that the terminal receives the first downlink indication information but does not successfully decode the first downlink indication information, the terminal sends feedback information to the network equipment, wherein the feedback information is Negative-acknowledgement (NACK). And under the condition that the terminal receives the first downlink indication information and successfully decodes the first downlink indication information, the terminal sends feedback information to the network equipment, wherein the feedback information is an Acknowledgement (ACK). With continued reference to fig. 6, in the case that the terminal does not receive the first downlink indication information, the terminal sends feedback information to the network device on PUCCH 1.

Another point to be described is that, when the terminal enables feedback of the first downlink instruction information, the step of transmitting the feedback information to the network device based on reception of the first downlink instruction information is performed. And under the condition that the terminal does not enable the feedback of the first downlink indication information, the terminal does not send feedback information to the network equipment. In this embodiment of the present application, the network device may instruct the terminal to start feedback of the first downlink indication information, where the process is:

The network equipment sends a first RRC signaling to the terminal, wherein the first RRC signaling is used for indicating the terminal to start feedback of first downlink indication information; the terminal receives a first RRC signaling, and starts feedback of first downlink indication information based on the first RRC signaling; for example, the first RRC signaling carries a configuration parameter MBMS-CS-PDCCH-FB-r17, where the configuration parameter MBMS-CS-PDCCH-FB-r17 is used to instruct the terminal to enable feedback of the first downlink indication information.

Or the first downlink indication information carries a first target information domain, and the first target information domain is used for indicating the terminal to start feedback of the first downlink indication information; and enabling the feedback of the first downlink indication information by the terminal based on the first target information domain. The first target information field may be an information field F2.

In this embodiment of the present application, the network device may instruct the terminal to start feedback of the first downlink indication information, and may instruct the terminal to close feedback of the first downlink indication information, where the process is: the network equipment sends a second RRC signaling to the terminal, wherein the second RRC signaling is used for indicating the terminal to close the feedback of the first downlink indication information; the terminal receives a second RRC signaling, and closes the feedback of the first downlink indication information based on the second RRC signaling; or the first downlink indication information carries a second target information domain, and the second target information domain is used for indicating the terminal to close the feedback of the first downlink indication information; and closing the feedback of the first downlink indication information by the terminal based on the second target information domain.

It should be noted that, the network device may also not distinguish the RRC signaling, but the content carried by the RRC signaling is used to instruct the terminal to enable or disable feedback of the first downlink indication information; correspondingly, the network equipment sends RRC signaling to the terminal, and the terminal starts the feedback of the first downlink indication information under the condition that the RRC signaling carries configuration parameters MBMS-CS-PDCCH-FB-r 17; and under the condition that the RRC signaling does not carry the configuration parameter MBMS-CS-PDCCH-FB-r17, the terminal closes the feedback of the first downlink indication information.

The other point to be described is that the network device may instruct the terminal to start or close the feedback of the first downlink instruction information by whether the first downlink instruction information carries the target information field without distinguishing the information fields; correspondingly, under the condition that the first downlink indication information carries the target information domain, the terminal starts feedback of the first downlink indication information; and under the condition that the first downlink indication information does not carry the target information domain, the terminal closes the feedback of the first downlink indication information. For example, the information field F1 is used for indicating a resource position of an uplink resource, and the information field F2 is used for indicating that the terminal enables feedback of the first downlink indication information; the information domain F1 is carried only on the premise that the access network indication terminal starts the feedback of the first downlink indication information; therefore, in the case that the first downlink indication information carries F2, F1 needs to be carried as well; in the case that the first downlink indication information does not carry F2, F1 does not need to be carried.

In the embodiment of the application, the network device can instruct the terminal to start or close the feedback of the first downlink instruction information through the RRC signaling or the first downlink instruction information, so that the flexibility can be improved.

Another point to be described is that, when the network device instructs the terminal to enable the feedback of the first downlink instruction information, the network device needs to configure uplink resources or an uplink resource set; and under the condition that the network equipment instructs the terminal to close the feedback of the first downlink instruction information, the network equipment does not need to configure uplink resources or uplink resource sets.

Another point to be noted is that, when the terminal receives the first downlink instruction information, the terminal activates SPS based on the first downlink instruction information. For example, with continued reference to fig. 6, in the event that the terminal receives the first DCI, the terminal activates SPS1.

Step 503: the network device receives the feedback information.

And the network equipment receives the feedback information on the uplink resource. In the case that each terminal has a dedicated uplink resource, the network device receives, for each terminal, feedback information of the terminal on the dedicated uplink resource of the terminal. In the case that each terminal does not have a dedicated uplink resource, but shares an uplink resource set, the network device receives feedback information of the terminal on each uplink resource in the uplink resource set.

It should be noted that, since the terminal may send feedback information, the terminal may not send feedback information; the network device may or may not receive the feedback information. The network device performs step 504 based on the receipt of the feedback information.

Step 504: based on the feedback information, the network device determines whether the terminal receives the first downlink indication information.

In the case that at least one terminal shares one uplink resource set, the network device may determine a first number, where the first number is a number of at least one terminal that does not receive the first uplink indication information, so as to determine which manner to retransmit the information based on the first number. Wherein the network device determines the first number of procedures as: the network equipment determines a third quantity, wherein the third quantity is the quantity of uplink resources which are in the uplink resource set and receive feedback information as ACK; and determining a difference value between N and the third quantity to obtain a first quantity, wherein N is the quantity of at least one terminal.

Since M is not greater than N, M is the number of uplink resources included in the uplink resource set; in case M is equal to N, the difference between N and the third quantity is the first quantity; if M is smaller than N, determining a difference value between N and the third quantity, and before obtaining the first quantity, determining whether the third quantity is equal to M, if the third quantity is not equal to M, determining that uplink resources in the uplink resource set are not occupied by the network equipment, and if the difference value between N and the third quantity is the first quantity; in the case where the third number is equal to M, the network device determines that the uplink resources in the uplink resource set are full, and the network device may default that at least one terminal has received the first downlink indication information, and does not perform the retransmission of the information in step 505.

In the case that at least one terminal shares an uplink resource set, each terminal does not have a dedicated uplink resource, the network device may also directly determine whether the uplink resource in the uplink resource set is full, at this time, the network device does not distinguish which terminals are fed back, which terminals are not fed back, and in the case that the uplink resource is full, at least one terminal receives the first downlink indication information by default, and at this time, the retransmission of the information in step 505 is not performed. In case the uplink resource is not fully occupied, retransmission of the information in step 505 is performed.

The network device performs the step of sending the second downlink indication information to the terminal in step 505, in the case that it is determined that the terminal does not receive the first downlink indication information based on the feedback information. The network device performs step 506 in case it is determined that the terminal receives the first downlink indication information based on the feedback information.

Step 505: and the network equipment sends second downlink indication information shared by the groups to at least one terminal on the PDCCH under the condition that the terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the terminal to activate SPS.

The second downlink indication information may be a second DCI or a second MAC. The second downlink indication information carries an identification of the SPS to be activated; and the identification of the SPS to be activated, which is carried by the second downlink indication information, is the same as or different from the identification of the SPS to be activated, which is carried by the first downlink indication information; when the identification of the SPS to be activated carried by the second downlink indication information is the same as the identification of the SPS to be activated carried by the first downlink indication information, the second downlink indication information and the first downlink indication information are used for indicating the terminal to activate the same SPS; and under the condition that the identification of the SPS to be activated carried by the second downlink indication information is different from the identification of the SPS to be activated carried by the first downlink indication information, the second downlink indication information and the first downlink indication information are used for indicating the terminal to activate different SPS.

The second downlink indication information carries a second time slot offset, and the second time slot offset carried by the second downlink indication information is the same as or different from the first time slot offset carried by the first downlink indication information. In addition, the second downlink indication information also carries a second HPID offset, and the second HPID carried by the second downlink indication information and the first HPID carried by the first downlink indication information are the same or different.

When the second time slot offset carried by the second downlink indication information is the same as the first time slot offset carried by the first downlink indication information, and the second HPID offset carried by the second downlink indication information is the same as the first HPID carried by the first downlink indication information, the offset between the PDCCH of the network device for transmitting the first downlink indication information to the terminal and the PDSCH for transmitting data to the terminal is the same. And under the condition that the second time slot offset carried by the second downlink indication information is different from the first time slot offset carried by the first downlink indication information and/or the second HPID offset carried by the second downlink indication information is different from the first HPID carried by the first downlink indication information, the network equipment determines a PDCCH for transmitting the second downlink indication information based on the second time slot offset and the second HPID offset, and transmits the second downlink indication information on the PDCCH.

In this embodiment of the present application, when the first slot offset and the second slot offset are different, and/or the first HPID offset and the second HPID offset are different, the time domain position of the PDCCH carried by the retransmitted second downlink indication information may be flexible and changeable.

For example, referring to fig. 9, the network device transmits a first DCI shared by a group to at least one terminal on GC-PDCCH1, the first DCI being an initial active DCI, and the at least one terminal sharing the first DCI, the first DCI being for indicating the at least one terminal to activate SPS; at least one terminal sends feedback information to the network equipment on uplink resources; the network device sends a second DCI shared by the group to at least one terminal on the GC-PDCCH2, the second DCI being supplemental active DCI, and the at least one terminal sharing the second DCI, the second DCI being for indicating the at least one terminal to activate SPS.

In the embodiment of the application, for the transmission of the second downlink indication information, the network device also adopts a group sharing mode for transmission, thereby improving the efficiency and saving the transmission resources.

It should be noted that, the network device may be configured in advance, and send the second downlink indication information in a shared manner or send the second downlink indication information in a separate manner. The network device may further determine, according to the first number of terminals that do not receive the first indication information, which manner to use to send the second downlink indication information, where the process is:

and under the condition that the first number is not smaller than the preset number, the network equipment adopts a group sharing mode to send the second downlink indication information, namely, the step of sending the group shared second downlink indication information to at least one terminal on the PDCCH is executed.

For example, with continued reference to fig. 6, if the second downlink indication information is the second DCI, the network device sends the second DCI to the terminal on PDCCH2, where the second DCI is DCI for complementing and activating SPS.

It should be noted that, the second downlink indication information is used to instruct the terminal to activate SPS, so that the subsequent network device sends data to the terminal on multiple PDSCH in SPS; therefore, the network device transmits the second downlink indication information to the terminal before transmitting data to the terminal on the PDSCH. For example, the network device sends first downlink indication information to the terminal on the PDCCU1, and in the case that the network device does not receive feedback information on the terminal-specific PUCCH1, the network device sends second downlink indication information to the terminal on the PDCCH2 after the PUCCH1 and before the PDSCH1, for instructing the terminal to activate the same SPS.

The embodiment of the application can solve the problem caused by the fact that the terminal does not receive or can not decode the downlink indication information for activating the SPS in the broadcasting scene, the multicasting scene and the multicasting scene, greatly improves the sending/receiving reliability of the downlink indication information for activating the SPS, simultaneously ensures that the terminal can not receive the data on the first PDSCH in the SPS process, and improves the reliability of the system.

Step 506: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

For each terminal, the network device transmits data to the terminal on multiple PDSCH in SPS, since the terminal has already activated SPS if the terminal has received the first downlink indication information or the second downlink indication information. And, the terminal also enables feedback of the data, that is, the terminal feeds back on an UpLink (UpLink, UL) corresponding to the PDSCH based on the reception of the data on the PDSCH.

For example, with continued reference to fig. 6, the SPS activated by the terminal is SPS1, the network device sends data 1 to the terminal on PDSCH1, and the terminal feeds back the reception of data 1 on UL 1; the network equipment sends data 2 to the terminal on PDSCH2, and the terminal feeds back the receiving condition of the data 2 on UL 2; the network device sends data k to the terminal on PDSCHk, and the terminal feeds back the reception of data k on ULk.

Note that the terminal receives data transmitted by the network device on a plurality of PDSCH in the SPS. The feedback of the terminal to the data can adopt an ACK/NACK feedback mechanism or a negative-only feedback mechanism.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating the SPS, a feedback mechanism of the terminal to the downlink indication information is added, and the network equipment sends the downlink indication information for the first time and retransmits the downlink indication information for the subsequent time in a group sharing mode, so that the receiving reliability of the downlink indication information is improved, and transmission resources can be saved.

Fig. 10 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to activate SPS, and the terminal has a feedback mechanism, and the terminal works in a broadcast scenario and/or a multicast scenario, and a multicast scenario is illustrated as an example. The method comprises the following steps:

step 1001: the network equipment sends first downlink indication information shared by groups to at least one terminal on the PDCCH, wherein the first downlink indication information is used for indicating the terminal to activate SPS.

Step 1002: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

Step 1003: the network device receives the feedback information.

Step 1004: based on the feedback information, the network device determines whether the terminal receives the first downlink indication information.

It should be noted that steps 1001 to 1004 are similar to steps 501 to 504, respectively, and will not be described herein.

Step 1005: and the network equipment sends second downlink indication information special for the first terminal to the first terminal on the PDCCH under the condition that the first terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the first terminal to activate SPS.

The first terminal is a terminal which does not receive the first downlink indication information in the at least one terminal, and the first terminal is one or more of the at least one terminal; under the condition that each terminal has a special uplink resource, for each terminal, the network equipment receives feedback information on the uplink resource, and the feedback information is ACK, and the terminal is determined to successfully receive the first downlink indication information; the network equipment does not receive feedback information on the uplink resource or receives feedback information of NACK, and determines that the terminal does not successfully receive the first downlink indication information, so that it can be determined which terminals receive the first downlink indication information and which terminals do not receive the first downlink indication information, and information retransmission can be performed in a targeted mode.

In the embodiment of the application, each terminal has a dedicated uplink resource, so that the network device can determine the receiving condition of each terminal on the first downlink indication information according to the resource position of the uplink resource, that is, can determine which terminals receive the first downlink indication information and which terminals do not receive the first downlink indication information based on the resource position of the uplink resource, thereby improving the accuracy.

The network device may directly send the second downlink indication information specific to the first terminal, or may send the second downlink indication information by adopting a separate sending manner when the first number is smaller than the preset number, that is, perform the step of sending the second downlink indication information specific to the first terminal on the PDCCH. The first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.

In this step, the network device transmits the second downlink instruction information by using a separate transmission method, that is, which terminal does not receive the first downlink instruction information, and which terminal is transmitted the second downlink instruction information. For example, referring to fig. 11, the network device transmits a first DCI for group sharing to at least one terminal on GC-PDCCH1, the first DCI for indicating the at least one terminal to activate SPS; at least one terminal sends feedback information to the network equipment on uplink resources; the network device sends a special second DCI to the terminal 1 on the PDCCH special for the terminal 1, the second DCI is used for indicating the terminal 1 to activate SPS, the network device sends a special second DCI to the terminal 2 on the PDCCH special for the terminal 2, the second DCI is used for indicating the terminal 2 to activate SPS, the network device sends a special second DCI to the terminal t on the PDCCH special for the terminal t, and the second DCI is used for indicating the terminal t to activate SPS.

In the embodiment of the application, which terminal does not receive the first downlink indication information, the access network sends the second downlink indication information to which terminal, so that pertinence is improved.

According to the embodiment of the invention, the problem caused by the fact that the terminal does not receive or can not decode the downlink indication information for activating the SPS in a broadcasting scene can be solved, the sending/receiving reliability of the downlink indication information for activating the SPS is greatly improved, meanwhile, the problem that the terminal can not receive data on the first PDSCH in the SPS process is also guaranteed, and the reliability of the system is improved.

Step 1006: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

It should be noted that, step 1006 is similar to step 506, and is not described herein.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating the SPS, a feedback mechanism of the terminal to the downlink indication information is added, when the network device sends the downlink indication information for the first time in a group sharing mode, and then retransmits the downlink indication information, a single sending mode is used, that is, which terminal sends the downlink indication information to which terminal without receiving the downlink indication information, so that the receiving reliability of the downlink indication information is improved, and the pertinence of retransmission is also improved.

Fig. 12 is a flowchart illustrating an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to activate SPS, and the terminal has a feedback mechanism, and the terminal works in a unicast scenario for example. The method comprises the following steps:

step 1201: the network equipment sends first downlink indication information special for each terminal to each terminal on the PDCCH.

The network equipment distributes a special PDCCH for each terminal in advance, and for each terminal, the network equipment sends first downlink indication information special for the terminal to the terminal on the special PDCCH of the terminal.

Step 1202: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

Step 1203: the network device receives the feedback information.

Step 1204: based on the feedback information, the network device determines whether the terminal receives the first downlink indication information.

It should be noted that steps 1202-1204 are similar to steps 502-504, respectively, and are not described herein.

Step 1205: and the network equipment sends second downlink indication information special for the terminal to the first terminal on the PDCCH under the condition that the first terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the terminal to activate SPS.

The first terminal is one or more of the at least one terminal.

Step 1206: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

It should be noted that steps 1101-1106 are similar to steps 501-506, respectively, and will not be described again.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating the SPS, a feedback mechanism of the terminal to the downlink indication information is added, and the network device sends the downlink indication information for the first time and retransmits the downlink indication information subsequently in a separate mode, that is, sends the downlink indication information special for each terminal to each terminal, so that the receiving reliability of the downlink indication information is improved, and the effectiveness is also improved.

Fig. 13 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to release the SPS, and the terminal has a feedback mechanism for example. The method comprises the following steps:

step 1301: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

This step is similar to step 506 and will not be described in detail herein. For example, referring to fig. 14, the network device transmits data 1-data k to the terminals on PDSCH1-PDSCHk in SPS1, respectively, and the terminals feed back reception of the data 1-data k on UL1-ULk, respectively.

Step 1302: the network equipment sends first downlink indication information special for the terminal to each terminal on the PDCCH, wherein the first downlink indication information is used for indicating the terminal to release SPS.

For example, with continued reference to fig. 14, the first downlink indication information is a first DCI, carrying an identifier of SPS1, for indicating the terminal to release SPS1.

Step 1303: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

For example, with continued reference to fig. 14, the terminal sends feedback information to the network device on PUCCH 1.

Step 1304: the network device receives the feedback information.

Step 1305: the network device determines whether the first terminal receives the first downlink indication information based on the request for receiving the feedback information.

Step 1306: and the network equipment sends second downlink indication information special for the first terminal to the first terminal on the PDCCH under the condition that the first terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the first terminal to release SPS.

For example, with continued reference to fig. 14, the network device sends a second DCI specific to the first terminal on PDCCH2 to the first terminal, the second DCI being used to instruct the first terminal to release SPS1, and the second DCI being a complementary release DCI.

Steps 1302-1306 are similar to steps 1001-1005, respectively, and are not described in detail herein.

Step 1307: and under the condition that the first terminal receives the second downlink indication information, the first terminal releases the SPS based on the second downlink indication information.

The first terminal releases the SPS based on the identification of the SPS to be released, which is carried by the second downlink indication information.

In the embodiment of the application, in the scenario that the downlink indication information is used for releasing the SPS, a feedback mechanism of the terminal to the downlink indication information is added, and the network equipment retransmits the downlink indication information to the terminal under the condition that the terminal does not receive the downlink indication information based on the feedback information, so that the receiving reliability of the downlink indication information is improved.

Fig. 15 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to release SPS, and the terminal has a feedback mechanism for example. The method comprises the following steps:

step 1501: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

Step 1502: the network equipment sends first downlink indication information shared by groups to at least one terminal on the PDCCH, wherein the first downlink indication information is used for indicating the at least one terminal to release SPS.

Step 1503: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

Step 1504: the network device receives the feedback information.

Step 1505: the network device determines whether the first terminal receives the first downlink indication information based on the request for receiving the feedback information.

Step 1506: and the network equipment sends second downlink indication information shared by the groups to at least one terminal on the PDCCH under the condition that the first terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the at least one terminal to release SPS.

It should be noted that, step 1501 is similar to step 506, and steps 1502-1506 are similar to steps 501-505, respectively, and will not be described herein.

Step 1507: and under the condition that the at least one terminal receives the second downlink indication information, the at least one terminal releases the SPS based on the second downlink indication information.

It should be noted that, step 1507 is similar to step 1307, and will not be described herein.

Fig. 16 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to release the SPS, and the terminal has a feedback mechanism for example. The method comprises the following steps:

step 1601: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

Step 1602: the network equipment sends first downlink indication information shared by groups to at least one terminal on the PDCCH, wherein the first downlink indication information is used for indicating the at least one terminal to release SPS.

Step 1603: and the terminal sends feedback information to the network equipment based on the receiving condition of the first downlink indication information.

Step 1604: the network device receives the feedback information.

Step 1605: the network device determines whether the first terminal receives the first downlink indication information based on the request for receiving the feedback information.

Step 1606: and the network equipment sends second downlink indication information special for the first terminal to the first terminal on the PDCCH under the condition that the first terminal does not receive the first downlink indication information based on the feedback information, wherein the second downlink indication information is used for indicating the first terminal to release SPS.

Step 1607: and under the condition that the first terminal receives the second downlink indication information, the first terminal releases the SPS based on the second downlink indication information.

It should be noted that, step 1601 is similar to step 506, steps 1602-1606 are similar to steps 1001-1005, and step 1607 is similar to step 1307, and will not be described again.

Fig. 17 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to activate SPS, and the network device uses a blind retransmission mode to transmit the downlink indication information for illustration. The method comprises the following steps:

step 1701: the network equipment sends downlink indication information to at least one terminal according to the blind retransmission times, wherein the downlink indication information is used for indicating the terminal to activate SPS, and the blind retransmission times are integers larger than 1.

The terminal works in a multicast scene, a multicast scene and/or a broadcast scene, and the network equipment adopts a group sharing mode to send a plurality of downlink indication information; the step of sending downlink indication information to the terminal by the network equipment according to the blind retransmission times comprises the following steps: and the network equipment sends the downlink indication information shared by the groups to at least one terminal on the PDCCH according to the blind retransmission times. The terminal is one in a unicast mode, and the network equipment sends downlink indication information to the terminal according to the blind retransmission times, and the method comprises the following steps: and the network equipment sends the downlink indication information special for the terminal to the terminal on the PDCCH according to the blind retransmission times.

The terminal works in a multicast scene, a multicast scene and/or a broadcast scene, the network equipment adopts a group sharing mode to transmit the first downlink indication information, and subsequently adopts a single transmission mode to transmit the subsequent downlink indication information; the step of sending downlink indication information to the terminal by the network equipment according to the blind retransmission times comprises the following steps: the network equipment sends downlink indication information shared by groups to at least one terminal on the PDCCH; and sending downlink indication information special for each terminal to each terminal on the PDCCH according to the P retransmission times. Wherein P is an integer not less than 1, and P is less than the blind retransmission times.

For example, the number of blind retransmissions is 2, referring to fig. 18, the network device sends two downlink indication information successively, where the first downlink indication information is a first DCI for indicating that the terminal activates SPS1, and the second downlink indication information is a second DCI, which is a supplementary activation DCI for indicating that the terminal activates SPS1.

Wherein, the content carried by each downlink indication information is the same or different; for example, the slot offset carried by each downlink indication information is the same; or, the time slot offset carried by each downlink indication information is different; the time slot offset carried by each downlink indication information is the time slot offset of the PDCCH carried by each downlink indication information. In addition, the HPID offset carried by each downlink indication information is the same, or the HPID offset carried by each downlink indication information is different, and each downlink indication information carries an HPID offset of the PDCCH carried by each downlink indication information.

Step 1702: the terminal receives a plurality of downlink indication information sent by the network equipment, and determines target downlink indication information from the downlink indication information.

In the first case, the target downlink indication information is a first downlink indication information in the plurality of downlink indication information; the terminal stores the first downlink indication information after receiving the first downlink indication information, and directly discards the downlink execution information received subsequently after receiving the downlink indication information subsequently. For example, the number of blind retransmissions is 2, and the terminal successfully receives the first downlink indication information and then successfully receives the second downlink indication information, where the terminal is based on the received first downlink indication information.

In the second case, the target downlink indication information is the last downlink indication information in the plurality of downlink indication information; the terminal stores the first downlink indication information after receiving the first downlink indication information, and updates the stored downlink indication information into the latest received downlink indication information after receiving the downlink indication information. For example, the number of blind retransmissions is 2, and the terminal successfully receives the first downlink indication information and then successfully receives the second downlink indication information, and if the terminal is based on the newly received second downlink indication information, updates or covers the previously received first downlink indication information.

In the third case, the target downlink indication information is any one downlink indication information among a plurality of downlink indication information; the terminal randomly stores a downlink indication message. For example, the number of blind retransmissions is 2, and the terminal successfully receives the first downlink indication information and then successfully receives the second downlink indication information, and then the terminal randomly selects one downlink indication information.

And in the fourth case, if the contents carried by the plurality of downlink indication information are the same, the target downlink indication information is downlink indication information obtained by combining the plurality of downlink indication information. For example, the number of blind retransmissions is 2, and the terminal successfully receives the first downlink indication information and then successfully receives the second downlink indication information, and then the terminal combines the two downlink indication information. The precondition for combining the two downlink indication information is that the content carried by the two downlink indication information is the same.

It should be noted that these four cases may be separately performed, and only one branch may be performed.

Step 1703: the terminal activates SPS based on the target downlink indication information.

And the terminal activates the SPS based on the identification of the SPS to be activated, which is carried by the target downlink indication information.

Step 1704: the network device transmits data to the terminal on multiple PDSCH in the SPS.

For example, with continued reference to fig. 18, the network device sends data 1-data k to the terminals on PDSCH1-PDSCHk in SPS1, respectively, and the terminals feed back the reception of data 1-data k on UL1-ULk, respectively.

In the embodiment of the application, in the case that the downlink indication information is used for activating the SPS scene, the downlink indication information is sent to the terminal in a blind retransmission mode, so that the receiving reliability of the downlink indication information is improved.

Fig. 19 is a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the present application, the downlink indication information is used to release the SPS, and the network device uses a blind retransmission mode to transmit the downlink indication information as an example for explanation. The method comprises the following steps:

step 1901: the network device transmits data to at least one terminal on multiple PDSCH in the SPS.

For example, referring to fig. 20, the network device transmits data 1-data k to the terminals on PDSCH1-PDSCHk in SPS1, respectively, and the terminals feed back reception of the data 1-data k on UL1-ULk, respectively.

Step 1902: and the network equipment sends downlink indication information to at least one terminal according to the blind retransmission times, wherein the downlink indication information is used for indicating the terminal to release SPS.

Step 1903: the terminal receives a plurality of downlink indication information sent by the network equipment, and determines target downlink indication information from the downlink indication information.

Steps 1902-1903 are similar to steps 1701-1702 and are not described in detail herein. For example, the number of blind retransmissions is 2, and with continued reference to fig. 20, the network device sends two downlink indication information successively, where the first downlink indication information is a first DCI for indicating the terminal to release SPS1, and the second downlink indication information is a second DCI, which is a supplementary activation DCI for indicating the terminal to release SPS1.

For example, referring to fig. 21, the network device transmits a first DCI on PDCCH1 to the terminal, the first DCI indicating that the terminal activates SPS, and an offset between PDCCH1 and PDSCH1 is a fixed offset c; assuming that the terminal has received the first DCI and has activated SPS based on the first DCI; the network device sends second DCI to the terminal, wherein the second DCI is used for indicating the terminal to release SPS. In the case that the first DCI and the second DCI carry the same slot offset and HPID offset, the network device sends the second DCI to the terminal on PDCCH2, and the offset between PDCCH2 and PDSCH2 is also a fixed offset c; in case the first DCI and the second DCI carry different slot offset and HPID offset, then the network device sends the second DCI to the terminal on PDCCH3, the offset between PDCCH2 and PDSCH2 is not fixed offset c, not fixed offset d.

Step 1904: and the terminal releases the SPS based on the target downlink indication information.

And the terminal releases the SPS based on the identification of the SPS to be released, which is carried by the target downlink indication information.

In the embodiment of the application, in the scene that the downlink indication information is used for releasing the SPS, the downlink indication information is sent to the terminal in a blind retransmission mode, so that the receiving reliability of the downlink indication information is improved.

Fig. 22 shows a flowchart of an information retransmission method according to an exemplary embodiment of the present application. In the embodiment of the application, the terminal feeds back the data received on the first PDSCH in the SPS by adopting an ACK/NACK feedback mechanism, and feeds back the data received on the PDSCH after the first PDSCH by adopting a NACK-only feedback mechanism, so that the network device determines whether to retransmit the downlink indication information or not based on the feedback mechanism of the terminal on the data on the PDSCH. The method comprises the following steps:

step 2201: the network device sends first downlink indication information to at least one terminal, wherein the first downlink indication information is used for indicating the terminal to activate SPS.

In the case that the terminal receives the first downlink indication information, the terminal activates the SPS and receives data on the first PDSCH of the SPS. In the case that the terminal does not receive the first downlink indication information, the terminal does not activate SPS and does not receive data on the first PDSCH. In addition, the first downlink instruction information carries first instruction information of exclusive uplink resources of the terminal.

Step 2202: the network device transmits a plurality of data to the terminal on a plurality of PDSCH of the SPS.

When the terminal receives the first downlink indication information, the terminal receives data on the first PDSCH, and when the terminal receives the data on the first PDSCH, based on the first indication information, ACK is sent to the access network on a special uplink resource of the terminal, and at the moment, the access network determines that the terminal receives the first downlink indication information and the data sent on the first PDSCH; under the condition that the terminal does not receive the data on the first PDSCH, the terminal determines that the network equipment needs to send the data on the first PDSCH because the terminal has received the first downlink indication information, and at the moment, the terminal sends NACK (negative acknowledgement) to the network equipment on the special uplink resource of the terminal based on the first indication information, and the network equipment determines that the terminal does not receive the data on the first PDSCH based on the NACK and retransmits the data on the first PDSCH. And for the data received on the PDSCH after the first PDSCH, a NACK-only feedback mechanism is adopted for feedback. The uplink resources dedicated to the terminals used by the ACK/NACK feedback mechanism are configured to each terminal by the higher-layer Radio Resource Control (RRC) signaling.

Under the condition that the terminal does not receive the first downlink indication information, the terminal does not receive data on the first PDSCH, at the moment, the terminal does not perform any feedback, at the moment, the network equipment does not receive any feedback information on the special uplink resource of the terminal, and it is determined that the terminal does not receive the first downlink indication information.

Step 2203: and under the condition that the network equipment does not receive the feedback information on the special uplink resource of the first terminal, the network equipment sends second downlink indication information to the first terminal, wherein the second downlink indication information is used for indicating the terminal to activate SPS, and the first terminal indicates one or more of the terminals.

In the embodiment of the application, whether the feedback mechanism of the SPS configured/designated in the prior art is ACK/NACK or NACK-only, the data on the first PDSCH of the SPS adopts the feedback mechanism of ACK/NACK, so that the network device can determine whether the terminal receives the first downlink indication information.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating the SPS, a feedback mechanism of the terminal to the downlink indication information is added, and the network equipment retransmits the downlink indication information to the terminal under the condition that the terminal does not receive the downlink indication information based on the feedback information, so that the receiving reliability of the downlink indication information is improved.

Fig. 23 shows a block diagram of an information retransmission apparatus according to an exemplary embodiment of the present application. The apparatus may be implemented as, or part of, or applied in a network device, the apparatus comprising:

A first sending module 2301, configured to send first downlink indication information to at least one terminal, where the first downlink indication information is used to instruct the at least one terminal to activate or release a semi-persistent scheduling SPS;

a second sending module 2302, configured to send, if it is determined that the first terminal does not receive the first downlink indication information, second downlink indication information to the first terminal, where the second downlink indication information is used to instruct the first terminal to activate or release SPS, and the first terminal is one or more of at least one terminal.

In an optional design of the embodiment of the present application, at least one terminal works in a multicast scenario, and/or a broadcast scenario, and the first sending module 2301 is configured to send, on a physical downlink control channel PDCCH, first downlink indication information shared by a group to at least one terminal.

In an optional design of the embodiment of the present application, a second sending module 2302 is configured to send, on a PDCCH, second downlink indication information shared by a group to at least one terminal;

or alternatively, the first and second heat exchangers may be,

a second sending module 2302, configured to send, on the PDCCH, second downlink indication information specific to the first terminal.

In an optional design of the embodiment of the present application, the second sending module 2302 is configured to send, on the PDCCH, second downlink indication information shared by the group to at least one terminal when the first number is not less than the preset number;

The first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.

In an optional design of the embodiment of the present application, the second sending module 2302 is configured to send, on the PDCCH, second downlink indication information specific to the first terminal when the first number is less than the preset number;

In an optional design of the embodiment of the present application, the first downlink indication information carries first indication information of uplink resources dedicated to each terminal, where the uplink resources are used by the terminal to send feedback information to the network device;

the apparatus further comprises:

the first determining module is configured to determine, based on a first uplink resource, the first terminal, where the first terminal is a terminal that sends feedback information on the first uplink resource, and the first uplink resource is an uplink feedback resource that does not receive feedback information or an uplink feedback resource that receives feedback information as a negative message NACK.

The apparatus further comprises:

the second determining module is used for determining that the first terminal does not receive the first downlink indication information on the uplink resource special for the first terminal, and does not receive the feedback information;

the first terminal adopts a feedback mechanism of acknowledgement message/negative message ACK/NACK for the data received on a first physical downlink shared channel PDSCH in the SPS, and adopts a feedback mechanism of only negative message NACK-only for the data received on a PDSCH behind the first PDSCH in the SPS;

and configuring the uplink resources special for the first terminal by using the ACK/NACK feedback mechanism by using the high-level Radio Resource Control (RRC) signaling to the first terminal.

In an optional design of the embodiment of the present application, the first downlink indication information carries second indication information of an uplink resource set, where the uplink resource set is used for at least one terminal to send feedback information to the network device;

the uplink resource set comprises M uplink resources, the number of the terminals is N, M and N are positive integers, and M is not more than N;

a second sending module 2302, configured to send, on the PDCCH, second downlink indication information shared by the groups to at least one terminal if the second number is less than M;

the second number is the number of uplink resources in the uplink resource set, where feedback information is received.

In an optional design of the embodiment of the present application, at least one terminal works in a unicast scenario, and the first sending module 2301 is configured to send, on the PDCCH, first downlink indication information specific to the terminal to each terminal.

In an optional design of the embodiment of the present application, the second sending module 2302 is configured to send, when feedback information of the first terminal is not received, second downlink indication information to the first terminal before sending data to the first terminal.

In an optional design of the embodiment of the present application, the first slot offset carried by the first downlink indication information is the same as the second slot offset carried by the second downlink indication information;

or alternatively, the first and second heat exchangers may be,

the first time slot offset carried by the first downlink indication information is different from the second time slot offset carried by the second downlink indication information;

the first time slot offset and the second time slot offset are time slot offsets of PDCCH carried by the first downlink indication information and the second downlink indication information respectively.

In an optional design of the embodiment of the present application, a first HPID offset carried by the first downlink indication information and a second HPID offset carried by the second downlink indication information are the same;

Or alternatively, the first and second heat exchangers may be,

the first HPID offset carried by the first downlink indication information is different from the second HPID offset carried by the second downlink indication information;

the first HPID offset and the second HPID offset are offsets of HPIDs of PDCCHs carried by the first downlink indication information and the second downlink indication information, respectively.

In an alternative design of an embodiment of the present application, the apparatus further comprises:

the second sending module 2302 is configured to send, when the first terminal starts feedback of the first downlink instruction information, second downlink instruction information to the first terminal if it is determined that the first terminal does not receive the first downlink instruction information.

the third sending module is used for sending RRC signaling to the terminal, wherein the RRC signaling is used for indicating the first terminal to start the feedback of the first downlink indication information;

or alternatively, the first and second heat exchangers may be,

the first downlink indication information carries a target information domain, and the target information domain is used for indicating the first terminal to start feedback of the first downlink indication information.

Fig. 24 shows a block diagram of an information retransmission apparatus according to an exemplary embodiment of the present application. The apparatus may be implemented as, or part of, or applied in a network device, the apparatus comprising:

the fourth sending module 2401 is configured to send downlink indication information to at least one terminal according to the number of blind retransmission, where the number of blind retransmission is an integer greater than 1, and the downlink indication information is used to instruct the at least one terminal to activate or release to change the SPS.

In an optional design of the embodiment of the present application, at least one terminal works in a multicast scenario, a multicast scenario and/or a broadcast scenario, and the fourth sending module 2401 is configured to send downlink indication information shared by a group to at least one terminal on a downlink control channel PDCCH according to blind retransmission times;

or alternatively, the first and second heat exchangers may be,

the fourth sending module 2401 is configured to send, on the PDCCH, downlink indication information specific to the terminal to each terminal according to the number of blind retransmissions.

In an optional design of the embodiment of the present application, at least one terminal works in a multicast scenario, and/or a broadcast scenario, and the fourth sending module 2401 is configured to send, on the PDCCH, downlink indication information shared by the group to the at least one terminal; and sending downlink indication information special for the terminal to each terminal on the PDCCH according to the number of P retransmission times, wherein P is an integer not less than 1, and P is less than the blind retransmission times.

In an optional design of the embodiment of the present application, the slot offset carried by each downlink indication information is the same;

or alternatively, the first and second heat exchangers may be,

the time slot offset carried by each downlink indication information is different;

the time slot offset carried by each downlink indication information is the time slot offset of the PDCCH carried by each downlink indication information.

In an optional design of the embodiment of the present application, the HPID offset of the hybrid retransmission request process carried by each downlink indication information is the same;

or alternatively, the first and second heat exchangers may be,

the HPID offset carried by each downlink indication information is different;

the HPID offset carried by each downlink indication information is an offset of the HPID of the PDCCH carried by each downlink indication information.

In the embodiment of the application, in the scene that the downlink indication information is used for activating or releasing the SPS, the downlink indication information is sent to the terminal in a blind retransmission mode, so that the receiving reliability of the downlink indication information is improved.

Fig. 25 shows a block diagram of an information retransmission apparatus according to an exemplary embodiment of the present application. The apparatus may be implemented as a terminal, or as part of a terminal, or applied in a terminal, the apparatus comprising:

a first receiving module 2501, configured to receive a plurality of downlink indication information sent by a network device, where the downlink indication information is used to instruct a terminal to activate or release a semi-persistent scheduling SPS, and the plurality of downlink indication information is sent by the network device based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information;

The processing module 2502 is configured to activate or release SPS based on the target downlink indication information, where the target downlink indication information is one of a plurality of downlink indication information.

In an alternative design of the embodiments of the present application, the first receiving module 2501 includes:

a sending unit, configured to send feedback information to the network device when the first downlink indication information sent by the network device is not received, where the feedback information is used to indicate that the terminal does not receive the first downlink indication information;

and the receiving unit is used for receiving the second downlink indication information sent by the network equipment.

In an optional design of the embodiment of the present application, the first downlink indication information carries first indication information of an uplink resource dedicated to the terminal, and the sending unit is configured to send feedback information to the network device on the uplink resource dedicated to the terminal based on the first indication information;

or, the first downlink indication information carries second indication information of an uplink resource set, the uplink resource set includes M uplink resources, M is a positive integer, and the sending unit is configured to send feedback information to the network device on any uplink resource in the uplink resource set based on the second indication information.

In an optional design of the embodiment of the present application, the sending unit is configured to send feedback information to the network device when the terminal enables feedback of the first downlink indication information.

the second receiving module is used for receiving Radio Resource Control (RRC) signaling sent by the network equipment, the RRC signaling is used for indicating the terminal to start feedback of the first downlink indication information, and the first starting module is used for starting feedback of the first downlink indication information based on the RRC signaling;

or alternatively, the first and second heat exchangers may be,

the first downlink indication information carries a target information domain, the target information domain is used for indicating the terminal to start the feedback of the first downlink indication information, and the second starting module is used for starting the feedback of the first downlink indication information based on the target information domain.

In an optional design of the embodiment of the present application, the first receiving module 2501 is configured to receive a plurality of downlink indication information sent by a network device based on the blind retransmission times.

In an optional design of the embodiment of the present application, the target downlink indication information is the last received downlink indication information in the plurality of downlink indication information.

The storage module is used for storing the first downlink indication information under the condition that the first downlink indication information sent by the network equipment is received;

and the updating module is used for updating the stored downlink indication information into the latest received downlink indication information under the condition that the downlink indication information sent by the network equipment subsequently is received.

In an optional design of the embodiment of the present application, the target downlink indication information is a first downlink indication information received from the plurality of downlink indication information;

or alternatively, the first and second heat exchangers may be,

the target downlink indication information is any one downlink indication information among a plurality of downlink indication information.

a third receiving module, configured to receive data sent by a network device on multiple PDSCH in SPS;

the first feedback module is used for feeding back the data received on the first physical downlink shared channel PDSCH by adopting a feedback mechanism of acknowledgement message/negative message ACK/NACK;

and the second feedback module is used for feeding back the data received on the PDSCH after the first PDSCH by adopting a feedback mechanism of only negative message NACK-only.

In the embodiment of the application, in the scenario that the downlink indication information is used for activating or releasing the SPS, the terminal receives a plurality of downlink control information sent by the network device, so that the reliability of receiving the downlink control information is improved.

Fig. 26 shows a schematic structural diagram of a communication device (network device or terminal) according to an exemplary embodiment of the present application, where the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 via a bus 105.

The memory 104 may be used to store at least one instruction that the processor 101 is configured to execute to implement the various steps of the method embodiments described above.

Further, the memory 104 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read-Only Memory, PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the information retransmission method performed by a network device or terminal provided by the above respective method embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the embodiments is merely illustrative of the principles and spirit of the embodiments, and the invention is not limited to the embodiments and is to cover all modifications, equivalents, improvements and alternatives falling within the spirit and scope of the embodiments.

Claims

An information retransmission method, performed by a network device, the method comprising:

transmitting first downlink indication information to at least one terminal, wherein the first downlink indication information is used for indicating the at least one terminal to activate or release a semi-persistent scheduling (SPS);

and under the condition that the first terminal does not receive the first downlink indication information, sending second downlink indication information to the first terminal, wherein the second downlink indication information is used for indicating the first terminal to activate or release the SPS, and the first terminal is one or more of the at least one terminal.
The method according to claim 1, wherein the at least one terminal is operated in a multicast scenario, a multicast scenario and/or a broadcast scenario, and the sending the first downlink indication information to the at least one terminal comprises:

and transmitting the first downlink indication information shared by the groups to the at least one terminal on a physical downlink control channel PDCCH.
The method of claim 2, wherein the sending the second downlink indication information to the first terminal comprises:

transmitting the second downlink indication information shared by the groups to the at least one terminal on the PDCCH; or, on the PDCCH, sending the second downlink indication information specific to the first terminal.
A method according to claim 3, characterized in that the method further comprises:

executing the step of transmitting the second downlink indication information shared by the groups to the at least one terminal on the PDCCH if the first number is not less than a preset number;

the first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.
A method according to claim 3, characterized in that the method further comprises:

executing the step of transmitting the second downlink indication information specific to the first terminal on the PDCCH if the first number is smaller than a preset number;

the first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.
A method according to claim 3, wherein the first downlink indication information carries first indication information of uplink resources dedicated to each terminal, the uplink resources being used for the terminal to send feedback information to the network device;

the method further comprises the steps of:

and determining the first terminal based on a first uplink resource, wherein the first terminal is a terminal for sending feedback information on the first uplink resource, and the first uplink resource is an uplink feedback resource which does not receive feedback information or an uplink feedback resource which receives feedback information as negative information NACK.
The method according to claim 1, wherein the first downlink indication information carries first indication information of uplink resources dedicated to each terminal, and the uplink resources are used for the terminal to send feedback information to the network device;

the method further comprises the steps of:

on the uplink resource special for the first terminal, feedback information is not received, and the first terminal is determined not to receive the first downlink indication information;

the first terminal adopts a feedback mechanism of acknowledgement message/negative message ACK/NACK for data received on a first physical downlink shared channel PDSCH in the SPS, and adopts a feedback mechanism of only negative message NACK-only for data received on a PDSCH after the first PDSCH in the SPS;

And configuring the uplink resources special for the first terminal by using the ACK/NACK feedback mechanism by using a high-level Radio Resource Control (RRC) signaling to the first terminal.
The method of claim 3, wherein the first downlink indication information carries second indication information of an uplink resource set, and the uplink resource set is used for the at least one terminal to send feedback information to the network device;

the uplink resource set comprises M uplink resources, the number of the terminals is N, M and N are positive integers, and M is not more than N;

the method further comprises the steps of:

executing the step of transmitting the second downlink indication information shared by groups to the at least one terminal on the PDCCH if the second number is less than the M;

the second number is the number of uplink resources in the uplink resource set, where feedback information is received.
The method of claim 1, wherein the at least one terminal is operating in a unicast scenario, and wherein the sending the first downlink indication information to the at least one terminal comprises:

and sending the first downlink indication information special for the terminal to each terminal on the PDCCH.
The method of claim 1, wherein the sending the second downlink indication information to the first terminal comprises:

and under the condition that feedback information of the first terminal is not received, before data is sent to the first terminal, sending the second downlink indication information to the first terminal.
The method of claim 1, wherein a first slot offset carried by the first downlink indication information and a second slot offset carried by the second downlink indication information are the same; or, the first time slot offset carried by the first downlink indication information is different from the second time slot offset carried by the second downlink indication information;

the first time slot offset and the second time slot offset are time slot offsets of PDCCHs carried by the first downlink indication information and the second downlink indication information respectively.
The method according to claim 1 or 11, wherein a first hybrid retransmission request procedure identification, HPID, offset carried by the first downlink indication information is the same as a second HPID offset carried by the second downlink indication information; or, the first HPID offset carried by the first downlink indication information is different from the second HPID offset carried by the second downlink indication information;

The first HPID offset and the second HPID offset are offsets of HPIDs of PDCCHs carried by the first downlink indication information and the second downlink indication information, respectively.
The method according to claim 1, wherein the method further comprises:

and under the condition that the first terminal starts the feedback of the first downlink indication information, executing the step of sending second downlink indication information to the first terminal under the condition that the first terminal does not receive the first downlink indication information.
The method of claim 13, wherein the method further comprises:

sending an RRC signaling to the terminal, wherein the RRC signaling is used for indicating the first terminal to start the feedback of the first downlink indication information; or, the first downlink indication information carries a target information field, where the target information field is used to instruct the first terminal to enable feedback of the first downlink indication information.
An information retransmission method, performed by a network device, the method comprising:

and sending downlink indication information to at least one terminal according to the blind retransmission times, wherein the downlink indication information is used for indicating the at least one terminal to activate or release to change the semi-persistent scheduling SPS, and the blind retransmission times are integers larger than 1.
The method according to claim 15, wherein the at least one terminal is configured to operate in a multicast scenario, and/or a broadcast scenario, and the sending downlink indication information to the at least one terminal according to the blind retransmission times includes:

transmitting the downlink indication information shared by the groups to the at least one terminal on a downlink control channel (PDCCH) according to the blind retransmission times; or in the operation unicast mode of the at least one terminal, the sending downlink indication information to the at least one terminal according to the blind retransmission times includes:

and sending the downlink indication information special for each terminal to each terminal on the PDCCH according to the blind retransmission times.
The method according to claim 15, wherein the at least one terminal is configured to operate in a multicast scenario, and/or a broadcast scenario, and the sending downlink indication information to the at least one terminal according to the blind retransmission times includes:

transmitting the downlink indication information shared by the groups to the at least one terminal on the PDCCH;

and sending the downlink indication information special for the terminal to each terminal on the PDCCH according to the number of P retransmission times, wherein P is an integer not less than 1, and P is less than the blind retransmission times.
The method of claim 15, wherein the slot offset carried by each downlink indication information is the same; or, the time slot offset carried by each downlink indication information is different;

the time slot offset carried by each downlink indication information is the time slot offset of the PDCCH carried by each downlink indication information.
The method according to claim 15 or 18, wherein the hybrid retransmission request process identity HPID offset carried by each downlink indication information is the same; or, the HPID offset carried by each downlink indication information is different;

the HPID offset carried by each downlink indication information is an offset of the HPID of the PDCCH carried by each downlink indication information.
An information retransmission method, performed by a terminal, the method comprising:

receiving a plurality of downlink indication information sent by network equipment, wherein the downlink indication information is used for indicating the terminal to activate or release a semi-persistent scheduling (SPS), and the plurality of downlink indication information is sent by the network equipment based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information;

And activating or releasing the SPS based on target downlink indication information, wherein the target downlink indication information is one of the downlink indication information.
The method of claim 20, wherein the receiving the plurality of downlink indication information sent by the network device includes:

under the condition that the first downlink indication information sent by the network equipment is not received, sending feedback information to the network equipment, wherein the feedback information is used for indicating that the terminal does not receive the first downlink indication information;

and receiving second downlink indication information sent by the network equipment.
The method of claim 21, wherein the first downlink indication information carries first indication information of uplink resources dedicated to the terminal, and the sending feedback information to the network device includes:

based on the first indication information, sending feedback information to the network equipment on the uplink resource special for the terminal;

or, the first downlink indication information carries second indication information of an uplink resource set, where the uplink resource set includes M uplink resources, M is a positive integer, and the sending feedback information to the network device includes:

And based on the second indication information, sending feedback information to the network equipment on any uplink resource in the uplink resource set.
The method of claim 21, wherein the sending feedback information to the network device comprises:

and sending feedback information to the network equipment under the condition that the terminal starts the feedback of the first downlink indication information.
The method of claim 23, wherein the method further comprises:

receiving Radio Resource Control (RRC) signaling sent by the network equipment, wherein the RRC signaling is used for indicating the terminal to start the feedback of the first downlink indication information, and starting the feedback of the first downlink indication information based on the RRC signaling; or, the first downlink indication information carries a target information field, and the target information field is used for indicating the terminal to start the feedback of the first downlink indication information, and based on the target information field, the feedback of the first downlink indication information is started.
The method of claim 21, wherein the receiving the plurality of downlink indication information sent by the network device includes:

And receiving a plurality of downlink indication information sent by the network equipment based on the blind retransmission times.
The method of claim 21, wherein the target downlink indication information is a last received downlink indication information of the plurality of downlink indication information.
The method of claim 26, wherein the method further comprises:

storing first downlink indication information sent by the network equipment under the condition that the first downlink indication information is received;

and under the condition that the downlink indication information sent by the network equipment subsequently is received, updating the stored downlink indication information into the latest received downlink indication information.
The method of claim 21, wherein the target downlink indication information is a first received downlink indication information of the plurality of downlink indication information; or, the target downlink indication information is any one downlink indication information of the plurality of downlink indication information.
The method of claim 20, wherein the method further comprises:

receiving data transmitted by the network device on a plurality of PDSCH in the SPS;

For the data received on the first physical downlink shared channel PDSCH, a feedback mechanism of acknowledgement message/negative message ACK/NACK is adopted for feedback;

for data received on PDSCH after the first PDSCH, feedback is performed using a negative-message-only feedback mechanism.
An information retransmission apparatus, the apparatus comprising:

a first sending module, configured to send first downlink indication information to at least one terminal, where the first downlink indication information is used to indicate the at least one terminal to activate or release a semi-persistent scheduling SPS;

the second sending module is configured to send second downlink indication information to the first terminal when it is determined that the first terminal does not receive the first downlink indication information, where the second downlink indication information is used to instruct the first terminal to activate or release the SPS, and the first terminal is one or more of the at least one terminal.
The apparatus of claim 30, wherein the at least one terminal is configured to operate in a multicast scenario, and/or a broadcast scenario, and the first sending module is configured to send the first downlink indication information shared by the group to the at least one terminal on a physical downlink control channel PDCCH.
The apparatus of claim 31, wherein the second sending module is configured to send the second downlink indication information shared by the group to the at least one terminal on the PDCCH; or the second sending module is configured to send, on the PDCCH, the second downlink indication information specific to the first terminal.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

the second sending module is configured to send, on the PDCCH, the second downlink indication information shared by the groups to the at least one terminal if the first number is not less than a preset number;

the first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

the second sending module is configured to send, on the PDCCH, the second downlink indication information specific to the first terminal when the first number is less than a preset number;

the first number is the number of terminals which do not receive the first downlink indication information in the at least one terminal.
The apparatus of claim 32, wherein the first downlink indication information carries first indication information of uplink resources dedicated to each terminal, the uplink resources being used by the terminal to send feedback information to the network device;

the apparatus further comprises:

the first determining module is configured to determine, based on a first uplink resource, the first terminal is a terminal that sends feedback information on the first uplink resource, where the first uplink resource is an uplink feedback resource that does not receive feedback information or an uplink feedback resource that receives feedback information that is a negative message NACK.
The apparatus of claim 35, wherein the first downlink indication information carries first indication information of uplink resources dedicated to each terminal, the uplink resources being used by the terminal to send feedback information to the network device;

the apparatus further comprises:

the second determining module is configured to determine, on an uplink resource dedicated to the first terminal, that feedback information is not received, that the first terminal does not receive the first downlink indication information;

the first terminal adopts a feedback mechanism of acknowledgement message/negative message ACK/NACK for data received on a first physical downlink shared channel PDSCH in the SPS, and adopts a feedback mechanism of only negative message NACK-only for data received on a PDSCH after the first PDSCH in the SPS;

And configuring the uplink resources special for the first terminal by using the ACK/NACK feedback mechanism by using a high-level Radio Resource Control (RRC) signaling to the first terminal.
The apparatus of claim 32, wherein the first downlink indication information carries second indication information of an uplink resource set, the uplink resource set being used for the at least one terminal to send feedback information to the network device;

the uplink resource set comprises M uplink resources, the number of the terminals is N, M and N are positive integers, and M is not more than N;

the second sending module is configured to send, on the PDCCH, the second downlink indication information shared by the groups to the at least one terminal if the second number is less than the M;

the second number is the number of uplink resources in the uplink resource set, where feedback information is received.
The apparatus of claim 30, wherein the at least one terminal operates in a unicast scenario, and wherein the first sending module is configured to send the first downlink indication information specific to the terminal to each terminal on a PDCCH.
The apparatus of claim 30, wherein the second sending module is configured to send the second downlink indication information to the first terminal before sending data to the first terminal if feedback information of the first terminal is not received.
The apparatus of claim 30, wherein a first slot offset carried by the first downlink indication information and a second slot offset carried by the second downlink indication information are the same; or, the first time slot offset carried by the first downlink indication information is different from the second time slot offset carried by the second downlink indication information;

the first time slot offset and the second time slot offset are time slot offsets of PDCCHs carried by the first downlink indication information and the second downlink indication information respectively.
The apparatus of claim 30 or 40, wherein a first hybrid retransmission request procedure identification, HPID, offset carried by the first downlink indication information is the same as a second HPID offset carried by the second downlink indication information; or, the first HPID offset carried by the first downlink indication information is different from the second HPID offset carried by the second downlink indication information;

The first HPID offset and the second HPID offset are offsets of HPIDs of PDCCHs carried by the first downlink indication information and the second downlink indication information, respectively.
The apparatus of claim 30, wherein the apparatus further comprises:

the second sending module is configured to send, when the first terminal starts feedback of the first downlink indication information, second downlink indication information to the first terminal if it is determined that the first terminal does not receive the first downlink indication information.
The apparatus of claim 42, further comprising:

a third sending module, configured to send an RRC signaling to the terminal, where the RRC signaling is used to instruct the first terminal to enable feedback of the first downlink indication information; or, the first downlink indication information carries a target information field, where the target information field is used to instruct the first terminal to enable feedback of the first downlink indication information.
An information retransmission apparatus, the apparatus comprising:

the fourth sending module is configured to send downlink indication information to at least one terminal according to the number of blind retransmission, where the downlink indication information is used to instruct the at least one terminal to activate or release to change the SPS, and the number of blind retransmission is an integer greater than 1.
The apparatus of claim 44, wherein the at least one terminal is configured to operate in a multicast scenario, and/or a broadcast scenario, and the fourth sending module is configured to send the downlink indication information shared by the group to the at least one terminal on a downlink control channel PDCCH according to the blind retransmission times; or, the fourth sending module is configured to send, on the PDCCH, the downlink indication information specific to the terminal to each terminal according to the blind retransmission times.
The apparatus of claim 44, wherein the at least one terminal operates in a multicast scenario, and/or a broadcast scenario, and the fourth transmitting module is configured to transmit the downlink indication information shared by the group to the at least one terminal on a PDCCH; and sending the downlink indication information special for the terminal to each terminal on the PDCCH according to the number of P retransmission times, wherein P is an integer not less than 1, and P is less than the blind retransmission times.
The apparatus of claim 44, wherein the slot offset carried by each downlink indicator is the same; or, the time slot offset carried by each downlink indication information is different;

The time slot offset carried by each downlink indication information is the time slot offset of the PDCCH carried by each downlink indication information.
The apparatus according to claim 44 or 47, wherein the hybrid repeat request process identity, HPID, offset carried by each downlink indication information is the same; or, the HPID offset carried by each downlink indication information is different;

the HPID offset carried by each downlink indication information is an offset of the HPID of the PDCCH carried by each downlink indication information.
An information retransmission apparatus, the apparatus comprising:

the first receiving module is used for receiving a plurality of downlink indication information sent by the network equipment, wherein the downlink indication information is used for indicating the terminal to activate or release the semi-persistent scheduling SPS, and the plurality of downlink indication information is sent by the network equipment based on blind retransmission times; or the plurality of downlink indication information is sent by the network equipment under the condition that the terminal does not receive the sent downlink indication information;

and the processing module is used for activating the SPS or releasing the SPS based on target downlink indication information, wherein the target downlink indication information is one of the downlink indication information.
The apparatus of claim 49, wherein the first receiving module comprises:

a sending unit, configured to send feedback information to the network device when the first downlink indication information sent by the network device is not received, where the feedback information is used to indicate that the terminal does not receive the first downlink indication information;

and the receiving unit is used for receiving the second downlink indication information sent by the network equipment.
The apparatus of claim 50, wherein the first downlink indication information carries first indication information of an uplink resource dedicated to the terminal, and the sending unit is configured to send feedback information to the network device on the uplink resource dedicated to the terminal based on the first indication information;

or, the first downlink indication information carries second indication information of an uplink resource set, the uplink resource set includes M uplink resources, M is a positive integer, and the sending unit is configured to send feedback information to the network device on any uplink resource in the uplink resource set based on the second indication information.
The apparatus of claim 50, wherein the means for transmitting is configured to transmit feedback information to the network device if the terminal enables feedback of the first downlink indication information.
The apparatus of claim 52, wherein the apparatus further comprises:

a second receiving module, configured to receive a radio resource control RRC signaling sent by the network device, where the RRC signaling is configured to instruct the terminal to enable feedback of the first downlink indication information, and the first enabling module is configured to enable feedback of the first downlink indication information based on the RRC signaling; or, the first downlink indication information carries a target information field, the target information field is used for indicating the terminal to start the feedback of the first downlink indication information, and the second starting module is used for starting the feedback of the first downlink indication information based on the target information field.
The apparatus of claim 50, wherein the first receiving module is configured to receive a plurality of downlink indication information sent by the network device based on a blind retransmission number.
The apparatus of claim 50, wherein the target downlink indication information is a last received downlink indication information of the plurality of downlink indication information.
The apparatus of claim 55, wherein the apparatus further comprises:

the storage module is used for storing the first downlink indication information under the condition that the first downlink indication information sent by the network equipment is received;

and the updating module is used for updating the stored downlink indication information into the latest received downlink indication information under the condition that the downlink indication information sent by the network equipment subsequently is received.
The apparatus of claim 50, wherein the target downlink indication information is a first received downlink indication information of the plurality of downlink indication information; or, the target downlink indication information is any one downlink indication information of the plurality of downlink indication information.
The apparatus of claim 49, further comprising:

a third receiving module, configured to receive data sent by the network device on multiple PDSCH in the SPS;

the first feedback module is used for feeding back the data received on the first physical downlink shared channel PDSCH by adopting a feedback mechanism of acknowledgement message/negative message ACK/NACK;

And the second feedback module is used for feeding back the data received on the PDSCH after the first PDSCH by adopting a feedback mechanism of only negative message NACK-only.
A network device, the network device comprising:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the information retransmission method according to any one of claims 1 to 19.
A terminal, the terminal comprising:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the information retransmission method according to any one of claims 20 to 29.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by the processor to implement the method of information retransmission according to any of claims 1 to 29.