CN111435903B

CN111435903B - Information sending method, information receiving method, terminal and network equipment

Info

Publication number: CN111435903B
Application number: CN201910185791.2A
Authority: CN
Inventors: 郑倩; 刘思綦; 纪子超; 彭淑燕
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2023-04-07
Anticipated expiration: 2039-03-12
Also published as: CN111435903A

Abstract

The invention provides an information sending method, an information receiving method, a terminal and network equipment, wherein the information sending method comprises the following steps: transmitting retransmission indication information to the network equipment; the retransmission indication information is used for indicating that the first terminal has retransmission requirements for the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group. The embodiment of the invention can assist the network equipment to realize better resource scheduling performance, ensure the scheduling reliability of the network equipment and improve the resource utilization rate.

Description

Information sending method, information receiving method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information sending method, an information receiving method, a terminal, and a network device.

Background

A Long Term Evolution (LTE) system may support sidelink (sidelink, or translated into sidelink, etc.) for direct data transmission between terminals, such as User Equipment (UE), without passing through network Equipment.

The current sidelink transmission mainly includes several transmission forms of broadcast (broadcast), multicast (groupcast) and unicast (unicast). The unicast is one-to-one transmission, and the multicast is one-to-many transmission. The resource allocation modes of the Sidelink UE are mainly classified into two types: base station scheduling Mode (Mode 1), i.e. controlled by a network device (such as a base station) and allocating resources for each UE; UE autonomous Mode (Mode 2), i.e. the resources are selected autonomously by each UE.

Currently, the Sidelink unicast and multicast communication may support a physical layer Hybrid Automatic Repeat reQuest (HARQ) feedback mechanism. For the Sidelink unicast and multicast scenarios, the transmitting terminal (UE) may not directly transmit the Sidelink HARQ ACK/NACK (acknowledgement/negative acknowledgement) information to the network equipment (such as the base station).

However, if the sending terminal does not send the sildelink HARQ ACK/NACK information to the base station in the sildelink unicast and multicast scenarios, the base station may not know whether the corresponding sildelink transmission needs to be retransmitted, and thus the base station may not accurately schedule resources for the sending terminal in time when the sending terminal operates in the base station scheduling mode, which affects the resource scheduling performance of the base station.

Disclosure of Invention

The embodiment of the invention provides an information sending method, an information receiving method, a terminal and network equipment, and aims to solve the problem that whether the Sidelink transmission of a sending terminal needs to be retransmitted or not cannot be known by the network equipment in the existing Sidelink communication scene.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides an information sending method, applied to a first terminal, including:

transmitting retransmission indication information to the network equipment;

the retransmission indication information is used for indicating that the first terminal has retransmission requirements for the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group.

In a second aspect, an embodiment of the present invention provides an information receiving method, applied to a network device, including:

receiving retransmission indication information sent by a first terminal;

the retransmission indication information is used for indicating that the first terminal has a retransmission demand for the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group.

In a third aspect, an embodiment of the present invention further provides a terminal, where the terminal is a first terminal, and the terminal includes:

a sending module, configured to send retransmission indication information to a network device;

the retransmission indication information is used for indicating that the first terminal has retransmission requirements on the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group.

In a fourth aspect, an embodiment of the present invention further provides a network device, including:

the receiving module is used for receiving retransmission indication information sent by a first terminal;

In a fifth aspect, an embodiment of the present invention further provides a terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the information sending method.

In a sixth aspect, an embodiment of the present invention further provides a network device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the above information receiving method.

In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the information sending method or implements the steps of the information receiving method.

In the embodiment of the invention, the sending terminal can report the retransmission indication information of the corresponding Sidelink communication to the network equipment in the Sidelink communication scene, so that the network equipment can know whether the corresponding Sidelink transmission needs to be retransmitted or not, and therefore, when the sending terminal works in a base station scheduling mode, the auxiliary network equipment realizes better resource scheduling performance, the scheduling reliability of the network equipment is ensured, and the resource utilization rate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a flowchart of an information sending method according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a format of a MAC CE according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a second format of the MAC CE according to the embodiment of the present invention;

FIG. 4 is a diagram illustrating an application scenario of a first embodiment of the present invention;

FIG. 5 is a diagram illustrating a format of a MAC CE according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a second format of the MAC CE according to the first embodiment of the present invention;

fig. 7 is a schematic view of an application scenario of a second embodiment of the present invention;

fig. 8 is a flowchart of an information receiving method according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 11 is a second schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of a network device according to an embodiment of the present invention.

Detailed Description

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-advanced (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A and GSM are described in the literature from an organization named "third Generation Partnership project" (3 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for exemplary purposes, and uses NR terminology in most of the following description, and those skilled in the art will understand that the embodiments are only examples and not limiting, and the technical solution of the embodiments of the present invention can also be applied to applications other than NR system applications.

The wireless communication system of the embodiment of the invention comprises a terminal and network equipment. The terminal may also be referred to as a terminal Device or a User Equipment (UE), where the terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and a specific type of the terminal is not limited in the embodiment of the present invention. The network device may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, and the Base Station is not limited to a specific technical vocabulary as long as the same technical effect is achieved.

The present invention will be described in detail below with reference to examples and the accompanying drawings.

Referring to fig. 1, fig. 1 is a flowchart of an information sending method according to an embodiment of the present invention, where the method is applied to a first terminal. The first terminal is specifically a sending terminal in the Sidelink communication, and the Sidelink communication is at least one of a Sidelink unicast communication and a Sidelink multicast communication. The resource allocation Mode of the first terminal may be selected as a base station scheduling Mode (Mode 1). As shown in fig. 1, the method comprises the steps of:

step 101: and transmitting retransmission indication information to the network equipment.

The retransmission indication information is used for indicating that the first terminal has retransmission requirements for the Silelink communication with at least one target object. The target object is at least one of a target terminal and a target group. At least one terminal (i.e., a receiving terminal) may be included in the target set. The Sidelink communication between the first terminal and the target terminal is Sidelink unicast communication, and the Sidelink communication between the first terminal and the target group is Sidelink multicast communication.

Specifically, the retransmission indication information is sent by the first terminal after determining that the feedback information of the at least one target object includes HARQ NACK information, where the feedback information is feedback information of a Sidelink Transport Block (TB) sent by the at least one target object to the first terminal.

In a specific implementation, the first terminal may initiate a Sidleink unicast communication to at least one target terminal (for a Sidleink unicast scenario); the method also can initiate Sidleink multicast communication to at least one target group (aiming at a Sidleink multicast scene); or simultaneously initiating Sidleink unicast communication to at least one target terminal and Sidleink multicast communication to at least one target group (aiming at a mixed scenario of Sidelink multicast and unicast).

For the Sidleink unicast scenario, if the first terminal determines that the feedback information of part or all of the at least one target terminal is HARQ NACK information, it may send retransmission indication information to the network device, where the retransmission indication information is used to indicate that the first terminal has a retransmission requirement for the Sidelink unicast communication with the part or all of the target terminals.

For a Sidelink multicast scenario, if the first terminal determines that the feedback information of part or all of the target groups in at least one target group includes HARQ NACK information, it may send retransmission indication information to the network device, where the retransmission indication information is used to indicate that the first terminal has a retransmission requirement for Sidelink multicast communication with the part or all of the target groups. It should be noted that, for a target group, the target group includes multiple terminals, and if the feedback information of at least one terminal of the multiple terminals is HARQ NACK information, it may be determined that the feedback information of the target group includes HARQ NACK information.

For a scenario in which the scelink multicast and unicast are mixed, if the first terminal determines that the feedback information of some or all of the at least one target terminal is HARQ NACK information, and determines that the feedback information of some or all of the at least one target group includes HARQ NACK information, it may send retransmission indication information to the network device, where the retransmission indication information is used to indicate that the first terminal has retransmission requirements for the scelink unicast communication with the some or all target terminals and the scelink multicast communication with the some or all target groups.

The Sidleink TB is a data transmission unit of Sidelink unicast communication and can be uniquely identified by a Destination terminal identifier (Destination ID for the target UE for uplink) and a HARQ process number (HARQ process ID); alternatively, the data transmission unit of the Sidelink multicast communication may be uniquely identified by a Destination group ID (Destination ID for a specific group for a group pc) and an HARQ process number (HARQ process ID).

The information sending method of the embodiment of the invention can realize that the sending terminal reports the retransmission indication information of the corresponding Sidelink communication to the network equipment in the Sidelink communication scene, so that the network equipment can know whether the corresponding Sidelink transmission needs to be retransmitted or not, and therefore, when the sending terminal works in a base station scheduling mode, the network equipment is assisted to realize better resource scheduling performance, the reliability of network equipment scheduling is ensured, and the resource utilization rate is improved.

In this embodiment of the present invention, optionally, when the target object is a target terminal, the HARQ NACK information may include:

a target terminal identification and an HARQ process number of the target terminal;

or,

when the target object is a target terminal, the HARQ NACK information may include:

and the target terminal identification and the HARQ process number of the target terminal.

Thus, with the help of the HARQ NACK information, the sending terminal can be favorable to accurately know the Sidelink transmission needing to be retransmitted.

In this embodiment of the present invention, optionally, the first terminal may send the retransmission indication information to the network device through a Scheduling Request (SR) message, that is, the retransmission indication information in step 102 may be sent through an SR message.

Specifically, when the retransmission indication information is sent through the SR message, the sending resource of the SR message (i.e., the SR resource) may be shared with the conventional SR resource, but the retransmission indication information or the new transmission indication information (also referred to as the initial transmission indication information) is distinguished through the content (display indication manner) in the SR message, or the retransmission indication information or the new transmission indication information is distinguished through the preset binding relationship (hidden indication manner) between the sending position (resource) of the new transmission indication information and the sending position (resource) of the corresponding retransmission indication information; or, the sending resource of the SR message may be distinguished from the conventional SR resource, and whether the indication information is retransmitted or newly transmitted is distinguished through a mapping relationship (implicit indication manner) between different SR resources.

Optionally, a format of the SR message for transmitting the retransmission indication information may include at least one of:

a type indication field; the type indication field is used for distinguishing whether the indication information field is retransmission indication information or new transmission indication information;

an indication information field; the indication information field is used for indicating retransmission indication information or new transmission indication information;

a first preset code point; the first preset code point is used for indicating retransmission indication information;

a second preset code point; and the second preset code point is used for indicating new transmission indication information.

It can be understood that the transmission resource (SR resource) of the SR message in this format can be shared with the conventional SR resource or can be distinguished from the conventional SR resource.

Optionally, the retransmission indication information may include at least one of a target identifier, a HARQ process number, and a retransmission TB size. Understandably, for the target terminal, the target identifier is the target terminal identifier; and for the target group, the target identifier is a target group identifier.

The new transmission indication information may include at least one of a target identifier, a Logical Channel Identity (LCID), a Logical Channel Group (LCG) Identity (ID), and a new transmission TB size. For a target terminal, the target identifier is a target terminal identifier; and for the target group, this target identification is the target group identification.

In one embodiment, the type indication field and the indication information field may optionally correspond to a part of bits of the SR message. For example, the highest bit of the SR message is a type indication field, the type indication field is 0, which indicates that the indication information field is retransmission indication information, and the type indication field is 1, which indicates that the indication information field is new transmission indication information. And some or all bits of the indication information field may be used to indicate retransmission indication information or new transmission indication information.

In one embodiment, the first preset code point and the second preset code may correspond to all bits of the SR message. For example, if a SR message is 5 bits, code points 00000 and 00001 may be predefined to indicate new transmission indication information, 00010 to 10010 may be predefined to indicate retransmission indication information, and 10011 to 11111 may be reserved code points.

Optionally, the SR message for transmitting the retransmission indication information may satisfy any one of the following conditions:

(1) The transmission resource of the SR message is determined according to the preset mapping relation

Wherein, the mapping relation is the mapping relation between the distinguishing information and the sending resource; the distinguishing information includes at least one of an SR message type and an identification combination; the identification combination is the combination of the target identification and the HARQ process number of a target object in one Sidelink communication (Sidelink unicast communication or Sidelink multicast communication); the SR message types include: a first type and a second type; the first type of SR message is used for carrying retransmission indication information, and the second type of SR message is used for carrying new transmission indication information.

In one embodiment, the mapping relationship is a mapping relationship between SR message types and transmission resources, that is, the transmission resources of SR messages for transmitting retransmission indication information and the transmission resources of SR messages for transmitting new transmission indication information are distinguished, so as to distinguish the retransmission indication information or the new transmission indication information by different resource locations. In this manner, the indication of which Sidelink transmission is to be performed may be indicated in conjunction with the content in the corresponding retransmission indication information or new transmission indication information.

In one embodiment, the mapping relationship is a mapping relationship between the identification combination and the transmission resource, that is, each set of transmission resource configuration is correspondingly associated to one Sidelink communication, so as to transmit the SR message on the corresponding transmission resource (such as the nearest SR resource location). In this way, the type indication field in the SR message can be combined to distinguish between retransmission indication information and new transmission indication information. In this way, a network device such as a base station may configure at least two sets of SR resources for a transmitting terminal (i.e., a first terminal).

In one embodiment, the mapping relationship is a combination of SR message types and identities, and a mapping relationship between SR messages and transmission resources, that is, transmission resources for transmitting SR messages of retransmission indication information and transmission resources for transmitting SR messages of new transmission indication information are distinguished, and each set of transmission resource configuration is correspondingly associated to one Sidelink communication, so as to distinguish retransmission indication information or new transmission indication information by hiding different resource locations. And transmits the SR message on the corresponding transmission resource, such as the nearest SR resource location. In this way, if the format of the SR message is 1bit, the corresponding bit value can identify whether the target TB is required to be retransmitted, and the target TB corresponds to a combination of a target identification (Destination ID) and an HARQ process number (HARQ process ID) of the corresponding Sidelink communication; if the format of the SR message is multi-bit, the size of the target TB may be further indicated. In this way, if the first terminal determines that the feedback information of the multiple target objects includes HARQ NACK information, multiple SR messages may be sent on corresponding sets of SR resource locations.

(2) The position of the SR message on the sending resource is determined according to the preset first binding relation

The first binding relationship is a binding relationship between a sending position of new transmission indication information on a set of sending resources and a sending position of corresponding retransmission indication information.

In this case, a network device such as a base station may configure at least one set of transmission resources (i.e., SR resources) for a transmitting terminal (i.e., a first terminal), and a binding relationship exists between a transmission position of new transmission indication information and a transmission position of corresponding retransmission indication information on each set of transmission resources. For example, for a set of SR resources, the following binding relationship may be preset: the time n1, n2, n3, \ 8230is the sending position of the newly transmitted indication information, and the time n1+ T, n2+ T, n3+ T, \ 8230is the sending position of the corresponding retransmission indication information. It is understood that the time and frequency are illustrated here, and the same applies to the frequency domain, etc.

In this case, if the first terminal determines that the feedback information of the multiple target objects includes HARQ NACK information, multiple SR messages may be transmitted at corresponding multiple sets of SR resource locations based on the first binding relationship.

(3) The sending resource of the SR message is determined according to the preset second binding relation

And the second binding relationship is the binding relationship between the sending resource of the new transmission indication information and the sending resource of the corresponding retransmission indication information.

In this case, a network device such as a base station may configure at least two sets of transmission resources (i.e., SR resources) for a transmission terminal (i.e., a first terminal), where there is a binding relationship between different sets of transmission resources, that is, one set of transmission resources is a resource for newly transmitting an SR message, and another set of transmission resources is a resource for correspondingly retransmitting an SR message, and for example, an offset may be added between the two sets of transmission resources in a time-frequency or frequency domain.

In this case, if the first terminal determines that the feedback information of the multiple target objects includes HARQ NACK information, multiple SR messages may be transmitted on corresponding multiple sets of SR resource locations based on the second binding relationship.

It should be noted that, for the SR Resource used for sending the SR message, the network device, such as the base station, may be configured to the first terminal through Radio Resource Control (RRC) dedicated signaling.

Optionally, when a set of transmission resources is used to transmit a plurality of SR messages for a plurality of target objects, the transmission order of the plurality of SR messages may be any one of the following:

sorting according to the sequence of the target identifications of the plurality of target objects; for the target terminal, the target identifier is a target terminal identifier; for the target group, the target identifier is the target group identifier;

sequencing according to the sequence of the HARQ process numbers of the target objects;

and sequencing the data priority of the retransmission TBs of the plurality of target objects according to the sequence.

In this embodiment of the present invention, optionally, the first terminal may send the retransmission indication information to the network device through a Media Access Control Element (MAC CE), that is, the retransmission indication information in step 102 may be sent through the MAC CE.

Optionally, the MAC CE may satisfy any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

the MAC headers of the MAC CE and the Sidelink BSR comprise the same LCID, but are distinguished by reserved bits.

Wherein the MAC CE is a new MAC CE introduced compared with the current MAC CE. The new MAC CE and the Sidelink Buffer Status Report (Sidelink Buffer Status Report, sidelink BSR) may be reported independently, and the new MAC CE and the Sidelink BSR may be distinguished by different LCID values in the MAC packet header, that is, the new MAC CE is distinguished by a new LCID in the MAC packet header; or, the MAC headers of the new MAC CE and the Sidelink BSR include the same LCID, but are distinguished by reserved bits.

Optionally, when the introduced MAC CE is dedicated to indicate retransmission indication information, that is, the retransmission indication information is separately transmitted, the format of the MAC CE may include at least one of the following:

a Destination index (Destination index) field, a HARQ process index (HARQ process index) field, and a TB Size level (TB Size level) field.

The target index field is used for indicating a target terminal identifier or a target group identifier to which corresponding data needing to be retransmitted belongs. The value range of the index in the target index domain may be determined based on the number of the Sidelink connections (Sidelink unicast connection and/or Sidelink multicast connection) supported by the most corresponding transmitting terminals (i.e. the first terminals). For example, the sending terminal UE1 supports at most establishing N (N ≧ 1) Sidelink unicast connections, and the value range of the index in the corresponding target index domain is 1,2, 3.

And the HARQ process index field is used for indicating the HARQ process number used by the data which needs to be retransmitted. The value range of the index in the HARQ process index field may be determined based on the number of the most supported HARQ processes corresponding to the transmitting terminal. For example, the sending terminal UE2 supports at most M HARQ processes (M is greater than or equal to 1), and the value range of the index in the corresponding HARQ process index domain is 1,2, 3.

The TB size level field is used for indicating the size of the TB corresponding to the data needing to be retransmitted. The TB Size may be selected as the Size of the Buffer Size field in the current BSR design, and may take a value of, for example, 5 bits or 8 bits.

In an implementation, the format of the MAC CE introduced in this embodiment can be shown in fig. 2, where the target index field, the HARQ process index field, and the TB size level field are sequentially arranged, but not limited thereto, and may also be arranged according to other position sequences.

Optionally, when the introduced MAC CE is dedicated to indicate retransmission indication information and new transmission indication information, that is, the retransmission indication information and the new transmission indication information are transmitted simultaneously, the format of the MAC CE may include at least one of the following:

a Destination index (Destination index) field, a HARQ process index (HARQ process index) field, a TB Size level (TB Size level) field, an LCG ID field, and a Buffer Size level (Buffer Size level) field.

The target index field is used for indicating a target terminal identifier or a target group identifier to which corresponding data needing retransmission and newly transmitted belong. The value range of the index in the target index domain may be determined based on the number of the Sidelink connections (Sidelink unicast connection and/or Sidelink multicast connection) supported by the most corresponding sending terminals; for example, the sending terminal UE1 supports at most establishment of N (N ≧ 1) Sidelink unicast connections, and the value range of the index in the corresponding target index domain is 1,2, 3.

And the HARQ process index field is used for indicating the HARQ process number used by the data which needs to be retransmitted. The value range of the index in the HARQ process index field may be determined based on the number of the most supported HARQ processes corresponding to the transmitting terminal. For example, the transmitting terminal UE2 supports at most M HARQ processes (M is greater than or equal to 1), and the value range of the index in the corresponding HARQ process index field is 1,2, 3.

And the LCG identification domain is used for indicating the LCG identification which the corresponding data needing to be newly transmitted belongs to.

The cache size level field is used for indicating the size of the cache corresponding to the data needing to be newly transmitted. The range of the Buffer Size may be the Size of the Buffer Size domain in the current BSR design, and the value is, for example, 5 bits or 8 bits.

In an implementation, the format of the MAC CE introduced in this embodiment may be as shown in fig. 3, where the TB size level domain, the HARQ process index domain, the target index domain, the LCG identifier domain, and the buffer size level domain are sequentially arranged, but not limited thereto, and may also be arranged according to other position sequences. The TB size level field, HARQ process index field, and target index field in fig. 3 may correspond to retransmission indication information, and the target index field, LCG identification field, and buffer size level field may correspond to new transmission indication information.

The following describes an embodiment of the present invention with reference to fig. 4 and 7.

Example one

Example one is for the sildelink unicast scenario. As shown in fig. 4, 3 Sidelink Unicast connections (Unicast connections) are respectively established between UE a and UE B, UE C and UE D, that is, unicast connection 1 is established between UE a and UE B, unicast connection 2 is established between UE a and UE C, and Unicast connection 3 is established between UE a and UE D. TB between UE A and UE B is TB1, and TB1 uses HARQ process 1; the TB between the UE A and the UE C is TB2, and the TB2 uses HARQ process 1; the TB between UE a and UE D is TB3, and TB3 uses HARQ process 2. At this time, UE a is the transmitting end UE, and UE B, UE C, and UE D are the receiving end UE. For the data receiving situation of UE B, UE C, and UE D, UE B, UE C, and UE D may send Sidelink HARQ ACK information or HARQ NACK information to UE a, respectively.

For UE a, to distinguish HARQ feedback information from different receiving UEs (different TBs), a Destination terminal identifier (Destination ID) and a HARQ process number (HARQ process ID) need to be combined. For the TB with the HARQ feedback information NACK, the resource needs to be reselected for retransmission.

If the resource scheduling mode of UE a is mode 1, the retransmission indication information of the TB whose HARQ feedback information is NACK may be sent to the base station. The UE a may send the retransmission indication information in any one of the following manners:

the first method is as follows: transmission via SR messages

1) The SR resource of the SR message is shared with the traditional SR resource, and the content in the SR message distinguishes whether the indication information is retransmitted or newly transmitted

In this case 1), the base station may configure a set of SR resources for UE a.

If the UE a receives HARQ NACK information sent by a UE (for example, UE B) connected with a Sidelink unicast, where the HARQ NACK information includes a Destination ID of the UE B and a HARQ process number, that is, HARQ process number 1, the UE a may send an SR message at the closest SR resource location. The format of the SR message may refer to the above, and the SR message includes retransmission indication information indicating that UE a has a retransmission requirement for Sidelink communication with UE B.

If UE a receives HARQ NACK information sent by multiple UEs with Sidelink unicast connection (e.g., UE B and UE D), multiple SR messages may be continuously sent in a preset order at the closest SR resource location. The format of each SR message can be referred to above, and is not described herein again.

2) SR resources of the SR message are shared with traditional SR resources, and whether the SR message is retransmission indication information or new transmission indication information is implicitly indicated through a preset binding relationship

In case 2), the base station may configure at least one set of SR resources for the UE a, where a binding relationship exists between a transmission position of the new transmission indication information and a transmission position of the corresponding retransmission indication information on each set of SR resources, such as time n1, n2, n3, \8230, where the binding relationship is the transmission position of the new transmission indication information, time n1+ T, n2+ T, n3+ T, \8230, and the binding relationship is the transmission position of the corresponding retransmission indication information.

If the UE a receives HARQ NACK information sent by a UE (for example, UE B) with a Sidelink unicast connection, where the HARQ NACK information includes a Destination ID and a HARQ process number 1 of the UE B, and a sending position of new indication information of the UE B is time n, based on the binding relationship, the UE a may send an SR message at time n + T of a corresponding SR resource. Optionally, the format of the SR message may refer to the above content to indicate retransmission indication information.

If the UE a receives HARQ NACK information sent by multiple UEs with Sidelink unicast connection (for example, UE B and UE D), multiple SR messages may be sent at corresponding positions of multiple sets of SR resources based on the binding relationship.

3) The SR resource of the SR message is distinguished from the traditional SR resource so as to distinguish whether the SR resource is retransmission indication information or new transmission indication information through different resource positions

In this case 3), the base station may configure at least one set of SR resources for the UE a, where each set of SR resource configuration corresponds to a combination of a target terminal identifier and an HARQ process number associated with one Sidelink unicast connection.

If the UE a receives HARQ NACK information sent by a UE (for example, UE B) with a Sidelink unicast connection, where the HARQ NACK information includes a Destination ID and a HARQ process number 1 of the UE B, the UE a may first determine a set of SR resources corresponding to a combination of the Destination ID and the HARQ process number 1 of the UE B, and then send an SR message at a closest SR resource position.

If UE a receives HARQ NACK information sent by multiple UEs with Sidelink unicast connection (e.g., UE B and UE D), multiple SR messages may be sent on corresponding sets of SR resource locations.

The second method comprises the following steps: by introducing new MAC CE transmission

1) Introducing new MAC CE dedicated to indicating retransmission indication information

If UE a receives HARQ NACK information sent by a UE (for example, UE B) connected with a single unicast, where the HARQ NACK information includes a Destination ID of UE B, for example, destination 1 and HARQ process number 1, and TB Size level of UE B is 7, HARQ NACK feedback of UE a to UE B may send retransmission indication information to the base station through a MAC CE as shown in fig. 5.

If UE a receives HARQ NACK information sent by multiple UEs (e.g., UE B and UE D) connected in a Sidelink unicast, where a target terminal of UE B is Destination 1, a HARQ process number is 1, tb Size level is 7, a target terminal of UE D is Destination 3, a HARQ process number is 2, and tb Size level is 30, UE a sends HARQ NACK feedback for UE B and UE D, and may send retransmission indication information to the base station through the MAC CE shown in fig. 6.

2) Introducing new MAC CE dedicated to indicating retransmission indication information and new transmission indication information

If UE a receives HARQ NACK information sent by a UE (for example, UE B) with a Sidelink unicast connection, where the HARQ NACK information includes Destination ID of UE B, for example, destination 1 and HARQ process number 1, UE a may send retransmission indication information for HARQ NACK feedback of UE B based on the MAC CE format shown in fig. 3.

If UE a receives HARQ NACK information sent by multiple UEs (for example, UE B and UE D) connected in a Sidelink unicast manner, where a target terminal identifier of UE B is Destination 1, a HARQ process number is 1, a tb Size level is 7, a target terminal identifier of UE D is Destination 3, a HARQ process number is 2, and a tb Size level is 30, UE a may send retransmission indication information based on the MAC CE format shown in fig. 3 for HARQ NACK feedback of UE B and UE D.

Example two

Example two is for the sildelink multicast scenario. As shown in fig. 7, UE a is in 3 groups, where UE a, UE b, and UE c establish Group1 (Group 1), UE a, UE D, UE E, and UE F establish Group2 (Group 2), and UE a, UE G, and UE H establish Group3 (Group 2). Wherein, TB corresponding to Group1 is TB1, and HARQ process 1 is used for TB 1; the TB corresponding to the Group2 is TB2, and HARQ process 2 is used for the TB 2; the TB corresponding to Group3 is TB3, and TB3 uses HARQ process 1. At this time, UE A is the sending end UE, and other UEs B/C/D/E/F/G/H are the receiving end UE. For the data receiving situation of UE B/C/D/E/F/G/H, UE B/C/D/E/F/G/H can send Sidelink HARQ ACK information or HARQ NACK information to UE A respectively.

For UE a, it needs to determine whether TB of corresponding multicast transmission needs to be retransmitted according to joint indication results of HARQ feedback information from different receiving end UEs in a Group, and TB differentiation needs a joint target Group identifier (Destination Group ID) and a HARQ process number (HARQ process ID). And for the TBs which are determined to be retransmitted after the Sidelink HARQ feedback comprehensive processing, resources need to be reselected for retransmission.

If the resource scheduling mode of the UE a is mode 1, retransmission indication information of the TB determined to be retransmitted may be sent to the base station. The manner in which the UE a sends the retransmission indication information may refer to the manner described in the foregoing first example, and the "target group identifier" in this second example is replaced with the "target terminal identifier" in the first example, so that the method can be expanded and applied, and details are not repeated herein.

Referring to fig. 8, fig. 8 is a flowchart of an information receiving method according to an embodiment of the present invention, where the method is applied to a network device, and as shown in fig. 8, the method includes the following steps:

step 801: and receiving retransmission indication information sent by the first terminal.

The retransmission indication information is sent by the first terminal after determining that the feedback information of at least one target object includes HARQ NACK information, and the feedback information is feedback information of a Sidelink TB sent by the at least one target object to the first terminal. The retransmission indication information is used for indicating that the first terminal has a retransmission demand for the Silelink communication with the at least one target object; the target object is at least one of a target terminal and a target group.

The method of the embodiment of the invention can realize that the network equipment receives the retransmission indication information of the corresponding Sidelink communication reported by the sending terminal in the Sidelink communication scene, so that the network equipment can know whether the corresponding Sidelink transmission needs to be retransmitted or not, thereby assisting the network equipment to realize better resource scheduling performance, ensuring the scheduling reliability of the network equipment and improving the resource utilization rate when the sending terminal works in the base station scheduling mode.

In this embodiment of the present invention, optionally, the target object is a target terminal, and the HARQ NACK information includes:

or, the target object is a target group, and the HARQ NACK information includes:

a target group identification and a HARQ process number of the target group.

Optionally, the retransmission indication information is sent through an SR message.

Optionally, the format of the SR message includes at least one of:

Optionally, the retransmission indication information includes at least one of a target identifier, a HARQ process number, and a retransmission TB size;

the new transmission indication information includes at least one of a target identifier, an LCID, an LCG ID, and a new transmission TB size.

Optionally, the SR message satisfies any one of the following conditions:

the sending resource of the SR message is determined according to a preset mapping relation; wherein, the mapping relation is the mapping relation between the distinguishing information and the sending resource; the distinguishing information includes at least one of an SR message type and an identification combination; the identification combination is the combination of the target identification and the HARQ process number of a target object in the Sidelink communication; the SR message types include: a first type and a second type; the first type of SR message is used for carrying retransmission indication information, and the second type of SR message is used for carrying new transmission indication information;

the position of the SR message on the sending resource is determined according to a preset first binding relationship; the first binding relationship is the binding relationship between the sending position of the new transmission indication information and the sending position of the corresponding retransmission indication information on a set of sending resources;

the sending resource of the SR message is determined according to a preset second binding relationship; and the second binding relationship is the binding relationship between the sending resource of the new transmission indication information and the sending resource of the corresponding retransmission indication information.

Optionally, when a set of transmission resources is used to transmit a plurality of SR messages for a plurality of target objects, a transmission sequence of the plurality of SR messages is any one of:

sorting according to the sequence of the target identifications of the plurality of target objects;

Optionally, the retransmission indication information is sent by the MAC CE.

Optionally, when the MAC CE is used to send retransmission indication information, the format of the MAC CE includes at least one of the following:

a target index domain, a HARQ process index domain and a TB size level domain;

the target index domain is used for indicating a target terminal identifier or a target group identifier to which corresponding data needing to be retransmitted belongs;

the HARQ process index field is used for indicating the HARQ process number used by the data which needs to be retransmitted;

the TB size level field is used to indicate the size of the TB corresponding to the data that needs to be retransmitted.

Optionally, when the MAC CE is used to send retransmission indication information and new transmission indication information, the format of the MAC CE includes at least one of the following:

a target index domain, an HARQ process index domain, a TB size level domain, an LCG ID domain and a cache size level domain;

the target index domain is used for indicating a target terminal identifier or a target group identifier to which corresponding data needing to be retransmitted and newly transmitted belong;

the TB size grade field is used for indicating the size of a TB corresponding to data needing to be retransmitted;

the LCG identification domain is used for indicating the LCG identification corresponding to the data needing to be newly transmitted;

the cache size level field is used for indicating the size of the cache corresponding to the data needing to be newly transmitted.

Optionally, the MAC CE satisfies any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

The above embodiments describe the information sending method and the information receiving method of the present invention, and the terminal and the network device of the present invention will be described below with reference to the embodiments and the drawings.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 9, the terminal 900 is specifically a first terminal, and the terminal 900 includes:

a sending module 901, configured to send retransmission indication information to a network device;

The terminal of the embodiment of the invention can report the retransmission indication information of the corresponding Sidelink communication to the network equipment in the Sidelink communication scene, so that the network equipment can know whether the corresponding Sidelink transmission needs to be retransmitted or not, and therefore, when the terminal works in the base station scheduling mode, the network equipment is assisted to realize better resource scheduling performance, the reliability of network equipment scheduling is ensured, and the resource utilization rate is improved.

In this embodiment of the present invention, optionally, the retransmission indication information is sent by the first terminal after determining that the feedback information of the at least one target object includes HARQ NACK information, where the feedback information is feedback information of a Sidelink TB sent by the at least one target object to the first terminal.

Optionally, the target object is a target terminal, and the HARQ NACK information includes:

a target group identification and a HARQ process number for the target group.

Optionally, the format of the SR message includes at least one of:

Optionally, the SR message satisfies any one of the following conditions:

the position of the SR message on the sending resource is determined according to a preset first binding relationship; the first binding relationship is the binding relationship between the sending position of the new transmission indication information on a set of sending resources and the sending position of the corresponding retransmission indication information;

Optionally, the retransmission indication information is sent by the MAC CE.

a target index domain, a HARQ process index domain and a TB size level domain;

Optionally, the MAC CE satisfies any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

Referring to fig. 10, fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 10, the network device 100 includes:

a receiving module 110, configured to receive retransmission indication information sent by the first terminal.

The retransmission indication information is sent by the first terminal after determining that the feedback information of at least one target object includes HARQ NACK information, and the feedback information is feedback information of a Sidelink TB sent by the at least one target object to the first terminal. The retransmission indication information is used for indicating that the first terminal has retransmission requirements for Sidelink communication with at least one target object; the target object is at least one of a target terminal and a target group.

The network equipment of the embodiment of the invention can receive the retransmission indication information of the corresponding Sidelink communication reported by the sending terminal in the Sidelink communication scene, thereby obtaining whether the corresponding Sidelink transmission needs to be retransmitted or not, realizing better resource scheduling performance when the sending terminal works in a base station scheduling mode, ensuring the scheduling reliability of the network equipment and improving the resource utilization rate.

a target group identification and a HARQ process number of the target group.

Optionally, the format of the SR message includes at least one of:

a second preset code point; and the second preset code point is used for indicating the newly transmitted indication information.

Optionally, the SR message satisfies any one of the following conditions:

Optionally, when a set of transmission resources is used to transmit a plurality of SR messages for a plurality of target objects, a transmission order of the plurality of SR messages is any one of:

Optionally, the retransmission indication information is sent by the MAC CE.

a target index domain, a HARQ process index domain and a TB size level domain;

the TB size level field is used for indicating the size of the TB corresponding to the data needing to be retransmitted.

Optionally, the MAC CE satisfies any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

An embodiment of the present invention further provides a terminal, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above-mentioned information sending method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Specifically, fig. 11 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 1100 includes, but is not limited to: radio frequency unit 1101, network module 1102, audio output unit 1103, input unit 1104, sensor 1105, display unit 1106, user input unit 1107, interface unit 1108, memory 1109, processor 1110, and power supply 1111. Those skilled in the art will appreciate that the terminal structure shown in fig. 11 does not constitute a limitation of the terminal, and that the terminal may include more or fewer components than shown, or some of the components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The terminal 1100 is specifically the first terminal described above, and the radio frequency unit 1101 is configured to send retransmission indication information to the network device; the retransmission indication information is used for indicating that the terminal 1100 has a retransmission requirement for the Sidelink communication with at least one target object; the target object is at least one of a target terminal and a target group.

The terminal 1100 of the embodiment of the invention can report the retransmission indication information of the corresponding Sidelink communication to the network equipment in a Sidelink communication scene, so that the network equipment can know whether the corresponding Sidelink transmission needs to be retransmitted or not, and therefore, when the network equipment works in a base station scheduling mode, the network equipment is assisted to realize better resource scheduling performance, the scheduling reliability of the network equipment is ensured, and the resource utilization rate is improved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 1101 may be configured to receive and transmit signals during a message transmission or call process, and specifically, receive downlink data from a base station and then process the received downlink data to the processor 1110; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 1101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 1101 may also communicate with a network and other devices through a wireless communication system.

The terminal provides the user with wireless broadband internet access via the network module 1102, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 1103 may convert audio data received by the radio frequency unit 1101 or the network module 1102 or stored in the memory 1109 into an audio signal and output as sound. Also, the audio output unit 1103 may provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal 1100. The audio output unit 1103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 1104 is used to receive audio or video signals. The input Unit 1104 may include a Graphics Processing Unit (GPU) 11041 and a microphone 11042, and the Graphics processor 11041 processes image data of still pictures or video obtained by an image capturing device, such as a camera, in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1106. The image frames processed by the graphic processor 11041 may be stored in the memory 1109 (or other storage medium) or transmitted via the radio frequency unit 1101 or the network module 1102. The microphone 11042 may receive sound and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 1101 in case of the phone call mode.

Terminal 1100 can also include at least one sensor 1105, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 11061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 11061 and/or a backlight when the terminal 1100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 1105 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not further described herein.

The display unit 1106 is used to display information input by a user or information provided to the user. The Display unit 1106 may include a Display panel 11061, and the Display panel 11061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 1107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 1107 includes a touch panel 11071 and other input devices 11072. The touch panel 11071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near the touch panel 11071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 11071 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 1110, and receives and executes commands sent from the processor 1110. In addition, the touch panel 11071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 1107 may include other input devices 11072 in addition to the touch panel 11071. In particular, the other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 11071 can be overlaid on the display panel 11061, and when the touch panel 11071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1110 to determine the type of the touch event, and then the processor 1110 provides a corresponding visual output on the display panel 11061 according to the type of the touch event. Although the touch panel 11071 and the display panel 11061 are shown in fig. 11 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 11071 and the display panel 11061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 1108 is an interface for connecting an external device to the terminal 1100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. Interface unit 1108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within terminal 1100 or may be used to transmit data between terminal 1100 and external devices.

The memory 1109 may be used to store software programs as well as various data. The memory 1109 may mainly include a storage program area and a storage data area, where the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 1109 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1110 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 1109 and calling data stored in the memory 1109, thereby integrally monitoring the terminal. Processor 1110 may include one or more processing units; preferably, the processor 1110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 1110.

The terminal 1100 can also include a power supply 1111 (e.g., a battery) for providing power to various components, and preferably, the power supply 1111 can be logically connected to the processor 1110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

In addition, the terminal 1100 may further include some functional modules that are not shown, and are not described herein again.

The embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when being executed by the processor, the computer program implements each process of the information receiving method embodiment applied to the network device, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here.

Specifically, fig. 12 is a schematic diagram of a hardware structure of a network device for implementing various embodiments of the present invention, where the network device 120 includes, but is not limited to: a bus 121, a transceiver 122, an antenna 123, a bus interface 124, a processor 125, and a memory 126.

In this embodiment of the present invention, the network device 120 further includes: a computer program stored on the memory 126 and executable on the processor 125. The computer program when executed by the processor 125 implements the steps of:

receiving retransmission indication information sent by a first terminal;

A transceiver 122 for receiving and transmitting data under the control of the processor 125.

In fig. 12, a bus architecture (represented by bus 121), the bus 121 may include any number of interconnected buses and bridges, the bus 121 linking together various circuits including one or more processors, represented by processor 125, and memory, represented by memory 126. The bus 121 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 124 provides an interface between the bus 121 and the transceiver 122. The transceiver 122 may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 125 is transmitted over a wireless medium through the antenna 123, and further, the antenna 123 receives the data and transmits the data to the processor 125.

The processor 125 is responsible for managing the bus 121 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 126 may be used to store data used by processor 125 in performing operations.

Alternatively, the processor 125 may be a CPU, ASIC, FPGA or CPLD.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing information sending method embodiment or implements each process of the foregoing information receiving method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium is, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information sending method applied to a first terminal is characterized by comprising the following steps:

transmitting retransmission indication information to the network equipment;

the retransmission indication information is used for indicating that the first terminal has retransmission requirements on the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group;

wherein the retransmission indication information is sent through a Scheduling Request (SR) message, and the SR message satisfies any one of the following conditions:

2. The method of claim 1, wherein the retransmission indication information is sent by the first terminal after determining that the feedback information of the at least one target object includes hybrid automatic repeat request negative acknowledgement (HARQ NACK) information, and wherein the feedback information is feedback information of a Sidelink Sidelink Transport Block (TB) sent by the at least one target object to the first terminal.

3. The method of claim 2,

the target object is a target terminal, and the HARQ NACK information comprises:

or,

the target object is a target group, and the HARQ NACK information includes:

a target group identification and a HARQ process number for the target group.

4. The method of claim 1,

the format of the SR message comprises at least one of the following:

5. The method of claim 4,

the retransmission indication information comprises at least one of a target identification, a HARQ process number and a retransmission TB size;

the newly transmitted indication information includes at least one of a target identifier, a logical channel identifier LCID, a logical channel group identifier LCGID, and a newly transmitted TB size.

6. The method according to claim 1, wherein when transmitting a plurality of SR messages for a plurality of target objects using one set of transmission resources, the transmission order of the plurality of SR messages is any of:

7. The method of claim 1, wherein the retransmission indication information is sent via a Media Access Control (MAC) Control Element (CE).

8. The method according to claim 7, wherein when the MAC CE is used for transmitting retransmission indication information, the format of the MAC CE comprises at least one of:

a target index domain, a HARQ process index domain and a TB size level domain;

9. The method according to claim 7, wherein when the MAC CE is used for transmitting retransmission indication information and new transmission indication information, the format of the MAC CE comprises at least one of:

10. The method according to claim 7, wherein the MAC CE satisfies any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

11. An information receiving method applied to a network device, comprising:

receiving retransmission indication information sent by a first terminal;

wherein the retransmission indication information is sent through an SR message, and the SR message satisfies any one of the following conditions:

12. The method of claim 11,

the format of the SR message comprises at least one of the following:

13. The method of claim 12,

the new transmission indication information includes at least one of a target identifier, an LCID, an LCGID, and a new transmission TB size.

14. The method of claim 11, wherein the retransmission indication information is sent through a MAC CE.

15. The method of claim 14, wherein when the MAC CE is used for transmitting retransmission indication information, the format of the MAC CE comprises at least one of:

a target index domain, a HARQ process index domain and a TB size level domain;

16. The method according to claim 14, wherein when the MAC CE is used for transmitting retransmission indication information and new transmission indication information, the format of the MAC CE comprises at least one of:

17. The method according to claim 14, wherein the MAC CE satisfies any one of the following conditions:

the MAC CE is distinguished through a new LCID in the MAC packet header;

18. A terminal, wherein the terminal is a first terminal, the terminal comprising:

a sending module, configured to send retransmission indication information to the network device;

the retransmission indication information is used for indicating that the first terminal has retransmission requirements for the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group;

19. The terminal of claim 18,

the format of the SR message comprises at least one of the following:

20. The terminal of claim 18, wherein the retransmission indication information is sent via a MAC CE.

21. The terminal according to claim 20, wherein when the MAC CE is used for transmitting retransmission indication information, the format of the MAC CE comprises at least one of:

a target index domain, a HARQ process index domain and a TB size level domain;

22. The terminal according to claim 20, wherein when the MAC CE is used for transmitting retransmission indication information and new transmission indication information, a format of the MAC CE comprises at least one of:

23. A network device, comprising:

the retransmission indication information is used for indicating that the first terminal has a retransmission demand for the Silelink communication with at least one target object; the target object is at least one of a target terminal and a target group;

wherein the retransmission indication information is transmitted through an SR message, and the SR message satisfies any one of the following conditions:

24. The network device of claim 23,

the format of the SR message comprises at least one of the following:

25. The network device of claim 23, wherein the retransmission indication information is sent via a MAC CE.

26. The network device of claim 25, wherein when the MAC CE is configured to transmit retransmission indication information, a format of the MAC CE comprises at least one of:

a target index domain, a HARQ process index domain and a TB size level domain;

27. The network device of claim 25, wherein when the MAC CE is configured to transmit retransmission indication information and new transmission indication information, a format of the MAC CE comprises at least one of:

28. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the information transmitting method according to any one of claims 1 to 10.

29. A network device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the information receiving method according to any one of claims 11 to 17.

30. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the information transmission method according to any one of claims 1 to 10 or the steps of the information reception method according to any one of claims 11 to 17.