CN113141629B

CN113141629B - Periodic resource selection method, side link transmission method and terminal

Info

Publication number: CN113141629B
Application number: CN202010066634.2A
Authority: CN
Inventors: 彭淑燕; 纪子超; 姜炜
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2023-09-19
Anticipated expiration: 2040-01-20
Also published as: CN113141629A; WO2021147852A1

Abstract

The embodiment of the invention provides a periodic resource selection method, a side link transmission method and a terminal, wherein the periodic resource selection method comprises the following steps: according to the periodic resource reservation rule information, carrying out periodic resource reservation or resource detection; the periodic resource reservation rule information includes at least one of: a resource reservation period, the resource reservation period being set according to a TB transmission interval; a target number M of resources reserved for one resource reservation period. In the embodiment of the invention, the terminal can keep understanding of the information consistent according to the periodic reserved resource rule information, and perform periodic resource reservation or resource detection, so that other terminals can accurately exclude the resources reserved by the period when selecting the resources, avoid the problem of resource collision, and improve the reliability of data transmission of the terminal.

Description

Periodic resource selection method, side link transmission method and terminal

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a periodic resource selection method, a side link transmission method and a terminal.

Background

A long term evolution (Long Term Evolution, LTE) system supports sidelink (sidelink, etc.) from release 12, and is used for direct data transmission between end User Equipments (UEs), which are not through network devices.

The design of the LTE sidelink is suitable for specific public safety matters (such as emergency communication in disaster places like fire places or earthquakes), or Internet of vehicles (vehicle to everything, V2X) communication and the like. The internet of vehicles communication includes various services such as basic security type communication, advanced (automatic) driving, formation, sensor expansion, and the like. Since LTE sidelink only supports broadcast communications, it is mainly used for basic security class communications, and other advanced V2X services with strict requirements for quality of service (Quality of Service, qoS) in terms of latency, reliability, etc. will be supported by New Radio (NR) sidelink.

In the existing R16V 2X, a period reservation mechanism is defined, that is, a currently transmitted Transport Block (TB) may reserve resources for a subsequent TB period, but specific period resource reservation rules are not defined, for example: reserving one resource where the sidelink control information (Sidelink Control Information, SCI) is located, or reserving SCI indicates all reserved resources, if a periodic resource reservation rule is not defined, different terminals may have different understandings during detection, so that resource exclusion is inaccurate when selecting resources, and thus a problem of resource collision is caused.

Disclosure of Invention

The embodiment of the invention provides a periodic resource selection method, a side link transmission method and a terminal, which are used for solving the problem that resources are collided because the rule of periodically reserving resources is not uniformly understood by the terminal in a side link system, so that the resource is inaccurate in resource elimination when the resources are selected.

In order to solve the technical problems, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a method for selecting a periodic resource, which is applied to a terminal, including: according to the periodic resource reservation rule information, carrying out periodic resource reservation or resource detection;

the periodic resource reservation rule information includes at least one of:

a resource reservation period, the resource reservation period being set according to a TB transmission interval;

a target number M of resources reserved for one resource reservation period.

In a second aspect, an embodiment of the present invention provides a sidelink transmission method, which is applied to a terminal, and includes:

if the SCI associated with the TB transmission indicates that the TB transmission needs feedback or PSFCH is enabled, retransmission based on HARQ feedback is always adopted in the process of the TB transmission;

or alternatively

And if the preset condition is met, converting retransmission based on HARQ feedback into blind retransmission.

In a third aspect, an embodiment of the present invention provides a terminal, including:

the processing module is used for carrying out periodic resource reservation or resource detection according to the periodic resource reservation rule information;

the periodic resource reservation rule information includes at least one of:

a target number M of resources reserved for one resource reservation period.

In a fourth aspect, an embodiment of the present invention provides a terminal, including:

a first transmission module, configured to, if a SCI associated with a TB transmission indicates that the TB transmission needs feedback or a physical sidelink feedback channel PSFCH is enabled, always adopt retransmission based on HARQ feedback in a process of the TB transmission;

or alternatively

And the second transmission module is used for converting retransmission based on HARQ feedback into blind retransmission if the preset condition is met.

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

In a sixth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is executed by the processor to implement the steps of the sidelink transmission method of the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the periodic resource selection method of the first aspect described above; alternatively, the computer program when executed by a processor implements the steps of the sidelink transmission method of the second aspect described above.

In the embodiment of the invention, the terminal can keep understanding of the information consistent according to the periodic reserved resource rule information, and perform periodic resource reservation or resource detection, so that other terminals can accurately exclude the resources reserved periodically when selecting the resources, avoid the problem of resource collision, and improve the reliability of data transmission of the terminal.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for selecting periodic resources according to an embodiment of the present invention;

fig. 3 is a flow chart of a sidelink transmission method according to an embodiment of the present invention;

fig. 4 is a flow chart of a sidelink transmission method according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a periodic resource selection method according to a first embodiment of the present invention;

FIG. 6 is a schematic diagram of a periodic resource selection method according to a second embodiment of the present invention;

FIG. 7 is a schematic diagram of a periodic resource selection method according to a third embodiment of the present invention;

FIG. 8 is a schematic diagram of a periodic resource selection method according to a fourth embodiment of the present invention;

FIG. 9 is a schematic diagram of a periodic resource selection method according to a fifth embodiment of the present invention;

fig. 10 is a schematic diagram of a periodic resource selection method according to a sixth embodiment of the present invention;

fig. 11 is a schematic diagram of a sidelink transmission method according to a seventh embodiment of the present invention;

fig. 12 is a schematic diagram of a sidelink transmission method according to an eighth embodiment of the present invention;

fig. 13 is a schematic diagram of a sidelink transmission method according to a ninth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a terminal according to another embodiment of the present invention;

Fig. 16 is a schematic structural view of a terminal according to still another embodiment of the present application;

fig. 17 is a schematic structural view of a terminal according to still another embodiment of the present application;

fig. 18 is a schematic structural diagram of a terminal according to still another embodiment of the present application.

Detailed Description

The terms "comprises," "comprising," or any other variation 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 but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means at least one of the connected objects, e.g., a and/or B, meaning that it includes a single a, a single B, and that there are three cases of a and B.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Embodiments of the present invention are described below with reference to the accompanying drawings.

Referring to fig. 1, a schematic architecture diagram of a wireless communication system according to an embodiment of the present invention is provided. As shown in fig. 1, the wireless communication system may include: the network side device 11 and the plurality of terminals 12, the terminals 12 may be connected to the network side device 11 through an uplink (uplink) and a downlink (downlink), and the terminals 12 may be connected through a sidelink (sidelink).

The embodiment of the invention is mainly applied to the scene of the connection between terminals through the side connection.

The terminal 12 provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, a personal digital assistant (Personal Digital Assistant, PDA), a vehicle, or a Road Side Unit (RSU), etc. It will be understood by those skilled in the art that the words are not to be interpreted as limiting.

Referring to fig. 2, fig. 2 is a flowchart of a periodic resource selection method according to an embodiment of the present invention, where the periodic resource selection method is applied to a terminal, and includes:

step 21: according to the periodic resource reservation rule information, carrying out periodic resource reservation or resource detection;

The periodic resource reservation rule information includes at least one of:

a target number M of resources reserved for one resource reservation period.

In the embodiment of the invention, the terminal can keep understanding of the information consistent according to the periodic reserved resource rule information, and perform periodic resource reservation or resource detection, so that other terminals can accurately exclude the resources reserved by the period when selecting the resources, avoid the problem of resource collision, and improve the reliability of data transmission of the terminal.

For each resource pool, the higher layer configures whether this resource pool enables cycle reservation and configures some candidates of resource reservation cycles, and the terminal indicates the resource reservation cycle through the target SCI.

It should be noted that, performing periodic resource reservation or resource detection refers to that a transmitting terminal transmitting the target SCI performs periodic resource reservation according to periodic resource reservation rule information, while a receiving terminal receiving the target SCI performs resource detection according to periodic resource reservation rule information, and in addition, the process of resource detection does not only detect periodic resources.

For one TB, the resource reservation period is indicated by the target SCI, and the maximum number of resources that each SCI can reserve is Nmax, where Nmax is a maximum of 3.Nmax is a configurable value for each resource pool (resource pool), optionally 2 or 3. Further, the number of one TB transmission is not limited in mode 1 (mode 1), depending on the base station scheduling. One TB (including a blind retransmission mode and a HARQ retransmission mode based), the maximum number of transmissions in mode 2 (mode 2) is 32. Specifically RRC configured values. The RRC configures a maximum number of transmissions per priority on a per resource pool basis, per channel busy rate (Channel Busy Ratio, CBR) range.

The periodic resource reservation rule information may be predefined, preconfigured, configured or indicated by the target SCI.

The periodic resource reservation rule information is described in detail below.

1. The periodic resource reservation rule information includes a resource reservation period

In the embodiment of the present invention, the resource reservation period may be indicated by the "resource reservation period (Resource reservation period)" indication field of the target SCI. The resource reservation period indicated by the indication field may be set by the transmitting terminal of the target SCI.

Optionally, the resource reservation period is set according to a TB transmission interval. That is, when the higher layer enables reservation of periodic resources for a subsequent TB, the terminal sets the resource reservation period in the target SCI according to the TB transmission interval provided by the higher layer.

In the embodiment of the present invention, values of a plurality of resource reservation periods, for example, values of 16 resource reservation periods, are configured or preconfigured in a resource pool configured for a terminal.

In some embodiments of the invention, optionally, the "resource reservation period" of the target SCI indicates that the resource reservation period indicated in the domain is the same value in the resource pool as the TB transmission interval. Optionally, the protocol specifies that the TB transmission interval provided by the higher layer is a configured or preconfigured value in the resource pool.

In other embodiments of the present invention, the resource reservation period is a preset code point if there is no value in the resource pool that is the same as the TB transmission interval. The resource reservation period corresponding to the preset code point may be, for example, 0, or no period reservation is performed.

The above target SCI will be described below.

In the embodiment of the present invention, the target SCI is one of the following:

1) All SCIs associated with the currently transmitted TB (including the initial and/or retransmission of the TB);

2) One or more SCIs associated with a currently transmitted TB (including initial and/or retransmission of the TB);

optionally, the one or more SCIs are determined by a sending terminal of the SCI.

3) One or more SCIs associated with the currently transmitted TB, and including at least the SCI associated with the initial transmission of the currently transmitted TB;

4) The SCI associated with the initial transmission of the currently transmitted TB;

5) SCI associated with the first n transmissions of the currently transmitted TB (including the initial transmission and/or retransmission of the TB);

the value of n is a predefined or configured or preconfigured value, or the range of n is a predefined or configured or preconfigured value;

where the range of n may include an upper and/or lower limit of n.

6) The first n transmissions of the currently transmitted TB (including the initial transmission and/or retransmission of the TB) are associated SCIs and n is a value not greater than m_reserved, which is the number of resources reserved for one resource reservation period.

where the range of n may include an upper and/or lower limit of n.

The value of m_reserved is a predefined or configured or preconfigured value, or the range of m_reserved is a predefined or configured or preconfigured value.

Wherein the range of M_reserved may include an upper limit and/or a lower limit of M_reserved.

In the above description, the transmission of the TB may be divided into the primary transmission and the retransmission of the TB, and the selection and reservation of the resources for the primary transmission and the retransmission will be described below.

1. Regarding the initial transmission:

currently, the SCI supporting the currently transmitted TB reserves resources for the initial transmission period of the subsequent TB. In R16V 2X, allocation of resources to primary transmissions on an unreserved basis, i.e. based on detection and resource selection procedures, is also supported.

2. Regarding retransmission:

in R16, two retransmission modes are supported, one is blind retransmission (blind retransmission) and one is retransmission based on HARQ feedback (HARQ based retransmission).

Under blind retransmission, which is to reserve resources for retransmission, a plurality of retransmission resources are allocated for a TB in advance, and a transmitting terminal (TX UE) transmits retransmission of the TB on all retransmission resources allocated for the TB in advance.

In a retransmission mode based on HARQ feedback, resources are reserved for retransmission. Based on the retransmission of HARQ feedback, the initial transmission of the TB is transmitted on the initial transmission resource allocated for the TB, if the demodulation of the receiving terminal is successful, the ACK is fed back (confirmation is confirmed), and the transmitting terminal does not retransmit the TB any more; if the receiving terminal fails to demodulate, a NACK (negative acknowledgement) is fed back, and the transmitting terminal retransmits the TB on the retransmission resource allocated for the TB.

In the embodiment of the present invention, the above n value may be different for blind retransmission and retransmission based on HARQ feedback. I.e. the n values of the blind retransmission and the retransmission based on HARQ feedback are independently defined or independently preconfigured or independently configured.

In some embodiments of the present invention, the resource reservation period indicated by other SCIs than the target SCI in the SCI associated with the TB currently transmitted is a preset code point. The resource reservation period corresponding to the preset code point may be, for example, 0, or no period reservation is performed.

2. The periodic resource reservation rule information includes a target number M of resources reserved by one resource reservation period

In the embodiment of the present invention, the target number M of resources reserved in the one resource reservation period is the minimum one of the following two:

a number M1 of resources reserved for one resource reservation period predefined or preconfigured or configured;

the total number of resources K reserved for the terminal in one resource reservation period.

That is, if M1 is greater than or equal to K, then m=k, otherwise, m=m1.

The M1 reserved positions may be within one resource reservation period or may exceed the length of one resource reservation period, so that the resource reservation period and the resource reserved in the resource reservation period may overlap.

In an embodiment of the present invention, optionally, the configuration mode of M1 is at least one of the following:

-each resource pool (Per resource pool);

each priority (Per priority);

each terminal (Per UE);

each link (Perlink);

each transmission scheme (Per cast type) includes unicast (unicasting), multicast (groupcast) and broadcast (broadcast). The current sidelink transmission mode mainly comprises broadcasting, multicasting and unicasting. Unicast, as the name implies, is a one-to-one (one to one) transmission. There may be multiple groups in a transport multicast where the multicast is one-to-many. A broadcast is also a one-to-many transmission, and a broadcast may consider all UEs to belong to one group, and there are no groups.

That is, its corresponding M1 may be configured for each resource pool or each priority or each terminal or each link or each transmission scheme.

3. The periodic resource reservation rule information includes a target number M of resources reserved for one resource reservation period and a location of the resources reserved for the period.

In the embodiment of the present invention, optionally, the location of the resource reserved in the period satisfies one of the following conditions:

1) The M resources reserved in the period are the first M resources indicated by the target SCI in the current resource reservation period;

in the embodiment of the present invention, optionally, if the M resources reserved in the period are the first M resources indicated by the target SCI in the current resource reservation period or the first M resources carrying the resource reservation period indication, and the number of target SCIs carrying the resource reservation period indication is L1 or less than or equal to M, the number of resources reserved in one resource reservation period is L1.

2) The M resources reserved in the period are the first target SCI in the current resource reservation period and the M resources (including the resources of the time slot in which the SCI is located) in sequence after the time slot;

in the embodiment of the present invention, optionally, if the M resources reserved in the period are the first target SCI in the current resource reservation period and M resources in sequence after the time slot thereof, and the number L2 of reserved resources indicated by the first target SCI (including the resources of the time slot in which the SCI is located) is less than or equal to M, the number of resources reserved in one resource reservation period is L2.

3) The M resources reserved in the period are the first M resources in the K resources;

4) The M resources reserved in the period are M resources selected randomly from K resources;

5) The M resources reserved in the period are the last M resources in the K resources;

where K is the total number of resources reserved for the terminal in one resource reservation period.

In the embodiment of the present invention, the terminal sending the target SCI considers the number of resources reserved in each resource reservation period as M, and considers the positions of the reserved resources as defined above. When the terminal receiving the target SCI performs resource detection, the number of resources reserved by other terminals in each resource reservation period is considered to be M, and the positions of the resources to be excluded are considered to be defined as described above.

In the embodiment of the present invention, if the periodic resource reservation rule information includes a resource reservation period, the resource reservation period may be indicated by physical resources or logical resources of a resource pool.

In the Sidelink, the definition of the resource pool is a pattern of some available resources at a higher layer, the patterns are periodically applied and used as the available resources of the Sidelink, and the available resources of the Sidelink can be discontinuous in the corresponding physical resources in the time domain.

Optionally, in some embodiments, if the resource reservation period adopts physical resource indication and the reserved resource indicated by the target SCI is in the resource pool where the target SCI is located, the reserved resource is considered to be valid, otherwise the reserved resource is considered to be invalid; or alternatively

And if the resource reservation period adopts physical resource indication and the reserved resource indicated by the target SCI is positioned in a resource pool configured for the sending terminal of the target SCI, the reserved resource is considered to be effective, otherwise, the reserved resource is considered to be ineffective, and the resource pool configured for the sending terminal of the target SCI comprises the resource pool in which the target SCI is positioned and other available resource pools configured for the sending terminal.

The resource pool configured for the sending terminal may include: the resource pool in which the target SCI is located, and/or other available resource pools configured for the sending terminal.

For example, when the target SCI is located in resource pool 1, for a reserved resource (possibly partly in resource pool 1 and partly in resource pool 2) to be located in resource pool 2 of the terminal (one resource pool different from resource pool 1), the terminal considers that the resource located in resource pool 2 is reserved for the resource of the terminal in resource pool 2. The other terminal considers that this part of the resources is reserved in the resource pool 2 at the time of detection.

The positional relationship between the periodically reserved resources and the reserved resources indicated by the target SCI is described below.

Optionally, in some embodiments, the periodically reserved resource is a resource in a resource pool configured for the sending terminal closest to the target SCI reserved resource location. The resource pool configured for the sending terminal may include: the resource pool in which the target SCI is located, and/or other available resource pools configured for the sending terminal.

Optionally, in some embodiments, the periodically reserved resource is an available resource in a resource pool configured for the sending terminal closest to the target SCI reserved resource location, and the available resource includes at least one of: resources not reserved by other terminals, resources not reserved by the terminals' resources (e.g., resources reserved by other process cycles or non-cycles), and resources not excluded. The resource pool configured for the sending terminal may include: the resource pool in which the target SCI is located, and/or other available resource pools configured for the sending terminal.

Optionally, the resources where the target SCI is located and the resources reserved for the period satisfy at least one of the following:

1) The resource where the target SCI is located and the resource reserved in the period are in the same resource pool;

that is, a reserved resource is considered to be invalid if it is located in another resource pool.

2) The resource where the target SCI is located and the resource reserved in the period are not in the same resource pool;

3) At least two resources of the plurality of resources reserved periodically are located in different resource pools.

In the embodiment of the present invention, optionally, the frequency domain resource and the time domain resource of the periodically reserved resource satisfy at least one of the following:

The granularity of the time domain resource is: one slot, or 1ms, or a plurality of slots predefined or configured or preconfigured, or a maximum or minimum number of time domain resources among the single resources reserved for the currently transmitted TB;

the frequency domain resource size is: a frequency domain resource size value obtained in the resource indication value (Resource indicator value, RIV), or the entire frequency domain resource of the resource pool, or the maximum or minimum frequency domain resource number of resources reserved for the currently transmitted TB;

the unit of the frequency domain resource is a physical resource block (Physical Resource Block, PRB) or a subchannel (subshannel);

the frequency domain resource reference position is a starting position of a frequency domain resource obtained from a resource indicated value indicated by the target SCI, or a lowest position of a lowest physical resource block or a subchannel of the PSCCH, or a lowest position of a highest physical resource block or a subchannel of the PSCCH, or a lowest or highest physical resource block of the PSCCH is offset by n_offset resource units, and a lowest or highest subchannel of the PSCCH is offset by n_offset resource units, where n_offset is a predefined or preconfigured or configured value.

Currently, a supporting terminal supports both blind retransmission and HARQ feedback-based reselection, but it is not specified how to support both blind retransmission and HARQ feedback-based reselection.

In order to solve the above problem, please refer to fig. 3, the present invention further provides a sidelink transmission method, which is applied to a terminal, and includes:

step 31: if feedback is required or a physical side link feedback channel (PSFCH) is enabled in the SCI associated with a TB transmission, HARQ feedback based retransmission is always employed during the TB transmission.

In the embodiment of the invention, when the terminal can support both the blind retransmission and the retransmission based on the HARQ feedback, if the TB transmission is indicated to need the feedback or PSFCH is enabled, the retransmission based on the HARQ feedback is always adopted, namely, after the retransmission is converted into the retransmission based on the HARQ feedback, the blind retransmission is not supported.

In some embodiments of the invention, optionally, further comprising: another HARQ feedback based retransmission of the TB may be sent before NACK feedback information is received or ACK feedback information is not received.

In order to solve the above problem, please refer to fig. 4, the present invention further provides a sidelink transmission method, which is applied to a terminal, and includes:

step 41: and if the preset condition is met, converting retransmission based on HARQ feedback into blind retransmission.

In the embodiment of the invention, when the terminal can simultaneously support the blind retransmission and the reselection based on the HARQ feedback, the method can be converted into the blind retransmission by the reselection based on the HARQ feedback.

Optionally, if the preset condition is met, the step of converting the retransmission based on the HARQ feedback into the blind retransmission includes:

if the preset condition is met, the SCI of the scheduling TB indicates that PSFCH is not enabled.

Optionally, the preset condition includes at least one of:

ACK feedback information (including DTX) is not received for consecutive L feedback times, L being a predefined or preconfigured or configured value;

receiving or continuously receiving L1 NACK feedback information, wherein L1 is a predefined or preconfigured or configured value;

l2 retransmissions are sent or consecutively sent, the L2 being a predefined or preconfigured or configured value;

the remaining time of the TB transmission (remaining PDB time) is less than or equal to a time threshold t_thresh, which is a predefined or preconfigured or configured value.

The remaining time of the TB transmission/total time of the TB transmission is less than or equal to x%, which is a predefined or preconfigured or configured value.

In some embodiments of the present invention, optionally, the converting from the retransmission based on HARQ feedback to a blind retransmission comprises: retransmission of the TB (including blind retransmission and retransmission based on HARQ feedback) is not transmitted until NACK feedback information is received or ACK feedback information is not received.

In some embodiments of the present invention, optionally, the converting from the retransmission based on HARQ feedback to a blind retransmission comprises: and before NACK feedback information is received or ACK feedback information is not received, sending blind retransmission of the TB, but not sending retransmission based on HARQ feedback, thereby improving the resource utilization rate.

The above method is illustrated below in connection with specific examples.

In the first embodiment of the invention:

the number of resources reserved in each resource reservation period is preconfigured in a resource pool (resource pool) to be 5, please refer to fig. 5, and the terminal reserves the first 5 reserved resources indicated by the target SCI in the current resource reservation period.

Wherein the target SCI is the SCI carrying the cycle indication. In the embodiment of the present invention, one SCI indicates three resources.

The second embodiment of the invention:

the number of resources reserved in each resource reservation period is preconfigured in the resource pool to be 5, please refer to fig. 6, and the terminal reserves the first target SCI and the first 5 reserved resources thereafter in the previous source reservation period.

The third embodiment of the invention:

referring to fig. 7, the number of resources reserved in the predefined period is equal to the number of all transmission resources reserved in the current resource reservation period.

The fourth embodiment of the invention:

referring to fig. 8, assume that the configured subcarrier spacing is 15kHz, and the higher layer configures a sidelink resource pool including physical timeslots 0-3,8-14,17-19,22-25,30,31,33,34,36-39. Renumbered on sidelink as logical slot resources 0-25.

In the time slot 1, the SCI carries a reserved resource period indication, and the reserved resource period is acquired to be P (6 ms) according to the indication information and the high-level configuration information, wherein the reserved resource period P is applied to the logic time slot resource of the sidelink.

The fifth embodiment of the invention:

referring to fig. 9, assume that the configured subcarrier spacing is 15kHz, and the higher layer configures a sidelink resource pool including physical timeslots 0-3,8-14,17-19,22-25,30,31,33,34,36-39. Renumbered on sidelink as logical slot resources 0-25.

In the time slot 1, the sci carries a reserved resource period indication, and acquires the reserved resource period P (6 ms) according to the indication information and the higher layer configuration information, where the reserved resource period P is applied to the physical time slot resource.

And if the reserved resource is not in the sidelink resource pool, the reserved resource is considered to be invalid. I.e. the reserved resource is 1,11,31,36 (physical resource number). 6,16,21,26 (physical resource number) is an invalid resource, and is considered to be unreserved.

The sixth embodiment of the invention:

referring to fig. 10, assume that the configured subcarrier spacing is 15kHz, and the higher layer configures a sidelink resource pool including physical timeslots 0-3,8-14,17-19,22-25,30, 31,33,34,36-39. Renumbered on sidelink as logical slot resources 0-25.

When the resource reservation is performed, if the reserved resource of the physical timeslot is not in the sidelink resource pool (for example, the physical resource with the number of 6), the reserved resource is the next available resource (i.e., the physical resource with the number of 8) in the resource pool. I.e. reserved resource 1,8,11,17,22,30,31,38 (physical slot resource number), i.e. 1,4,7,11,14,18,19,22 (logical resource number).

The seventh embodiment of the invention:

if feedback or PSFCH enablement is indicated in the SCI associated with the TB transmission, retransmission based on HARQ feedback is always employed during the TB transmission. I.e. after switching to retransmission based on HARQ feedback, blind retransmission is no longer supported.

Eighth embodiment of the present invention:

referring to fig. 11, as can be seen from fig. 11 (a) and (b), retransmission of the TB (including blind retransmission and retransmission based on HARQ feedback) is not transmitted until NACK feedback information or ACK feedback information is received.

Retransmission disabling based on HARQ feedback may then be indicated, translating into blind retransmission.

Embodiment nine of the present invention:

referring to fig. 12, it can be seen from fig. 12 that a blind retransmission of a TB may be transmitted before NACK feedback information is received or ACK feedback information is not received, thereby improving resource utilization.

The tenth embodiment of the invention:

referring to fig. 13, it can be seen from fig. 13 that another HARQ feedback based retransmission of the TB may be transmitted before NACK feedback information is received or ACK feedback information is not received.

Referring to fig. 14, the embodiment of the present invention further provides a terminal 140, including:

a processing module 141, configured to perform periodic resource reservation or resource detection according to the periodic resource reservation rule information;

the periodic resource reservation rule information includes at least one of:

a target number M of resources reserved for one resource reservation period.

Optionally, the periodic resource reservation rule information includes a resource reservation period, and the resource reservation period is set according to a TB transmission interval.

Optionally, the resource reservation period is the same value as the TB transmission interval in a resource pool.

Optionally, if the same value as the TB transmission interval does not exist in the resource pool, the resource reservation period is a preset code point.

Optionally, the target SCI is one of:

all SCIs associated with the currently transmitted TB;

one or more SCIs associated with the currently transmitted TB;

one or more SCIs associated with the currently transmitted TB, and including at least the SCI associated with the initial transmission of the currently transmitted TB;

the SCI associated with the initial transmission of the currently transmitted TB;

the first n transmissions of the currently transmitted TB are associated SCI;

the first n transmissions of the TB currently transmitted are associated SCIs and n is a value no greater than m_reserved, which is the number of resources reserved for one resource reservation period.

Optionally, the value of n is a predefined or configured or preconfigured value, or the range of n is a predefined or configured or preconfigured value;

optionally, the value of m_reserved is a predefined or configured or preconfigured value, or the range of m_reserved is a predefined or configured or preconfigured value.

Optionally, the resource reservation period indicated by other SCIs than the target SCI in the SCIs associated with the TB currently transmitted is a preset code point.

Optionally, the periodic resource reservation rule information includes a target number M of resources reserved by one resource reservation period.

Optionally, the target number M of resources reserved in the one resource reservation period is the minimum one of the following:

the TB scheduled for the target SCI reserves the total number of resources K for one resource reservation period.

Optionally, the configuration mode of the M1 is at least one of the following:

each resource pool;

each priority;

each terminal;

each link;

each transmission mode includes unicast, multicast and broadcast.

Optionally, the periodic resource reservation rule information includes a location of a periodically reserved resource.

Optionally, the location of the periodically reserved resource satisfies one of the following conditions:

the M resources reserved in the period are the first M resources indicated by the target SCI in the current resource reservation period;

the M resources reserved in the period are the first target SCI in the current resource reservation period and the M resources in sequence after the time slot;

The M resources reserved in the period are the first M resources in the K resources;

the M resources reserved in the period are M resources selected randomly from K resources;

the M resources reserved in the period are the last M resources in the K resources;

Optionally, if the M resources reserved in the period are the first M resources indicated by the target SCI in the current resource reservation period or the first M resources carrying the resource reservation period indication, and the number L1 of the target SCIs carrying the resource reservation period indication is less than or equal to M, the number of the resources reserved in one resource reservation period is L1.

Optionally, if the M resources reserved in the period are M resources sequentially after the first target SCI and the time slot thereof in the current resource reservation period, and the number L2 of reserved resources indicated by the first target SCI is less than or equal to M, the number of resources reserved in one resource reservation period is L2.

Optionally, the periodic resource reservation rule information includes a resource reservation period, and the resource reservation period is indicated by adopting a physical resource or a logical resource.

Optionally, if the resource reservation period adopts physical resource indication and the reserved resource indicated by the target SCI is in the resource pool where the target SCI is located, the reserved resource is considered to be valid, otherwise, the reserved resource is considered to be invalid; or alternatively

Optionally, the periodically reserved resource is the resource in the resource pool configured for the sending terminal closest to the resource position reserved by the target SCI; or alternatively

The resources reserved periodically are available resources in a resource pool configured for the sending terminal, which is closest to the resource position reserved by the target SCI, wherein the available resources comprise at least one of the following: resources not reserved by other terminals, resources not reserved by the terminals, and resources not excluded.

the resource where the target SCI is located and the resource reserved in the period are in the same resource pool;

the resource where the target SCI is located and the resource reserved in the period are not in the same resource pool;

At least two resources of the plurality of resources reserved periodically are located in different resource pools.

Optionally, the frequency domain resource and the time domain resource of the periodically reserved resource satisfy at least one of:

the frequency domain resource size is: the frequency domain resource size value obtained from the resource indicated value, or the whole frequency domain resource of the resource pool, or the maximum or minimum frequency domain resource number of the reserved resources for the current transmitted TB;

the unit of the frequency domain resource is a physical resource block or a subchannel;

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the embodiment of the method of fig. 2, and in order to avoid repetition, details are not repeated here.

Referring to fig. 15, an embodiment of the present invention further provides a terminal 150, including:

a first transmission module 151, configured to, if the SCI associated with the TB transmission indicates that the TB transmission needs feedback or PSFCH is enabled, always adopt retransmission based on HARQ feedback in the process of the TB transmission;

referring to fig. 16, an embodiment of the present invention further provides a terminal 160, including:

the second transmission module 161 is configured to convert retransmission based on HARQ feedback into blind retransmission if a preset condition is satisfied. Optionally, the preset condition includes at least one of:

ACK feedback information is not received in consecutive L feedback times, where L is a predefined or preconfigured or configured value;

the remaining time of the TB transmission is less than or equal to a time threshold value T _ thresh, which is a predefined or pre-configured or configured value,

Optionally, the second transmission module 161 is configured to send a blind retransmission of the TB before receiving NACK feedback information or not receiving ACK feedback information.

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the method embodiment of fig. 3, and in order to avoid repetition, a description is omitted here.

Fig. 17 is a schematic diagram of a hardware architecture of a terminal implementing various embodiments of the present invention, where the terminal 170 includes, but is not limited to: radio frequency unit 171, network module 172, audio output unit 173, input unit 174, sensor 175, display unit 176, user input unit 177, interface unit 178, memory 179, processor 1710, and power source 1711. It will be appreciated by those skilled in the art that the terminal structure shown in fig. 17 is not limiting of the terminal and that the terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the terminal comprises, 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 processor 1710 is configured to perform periodic resource reservation or resource detection according to the periodic resource reservation rule information;

the periodic resource reservation rule information includes at least one of:

a target number M of resources reserved for one resource reservation period.

Or alternatively, the process may be performed,

a processor 1710 configured to, if feedback is required for a TB transmission or PSFCH is enabled in a SCI associated with the TB transmission, always employ retransmission based on HARQ feedback in the process of the TB transmission; or if the preset condition is met, the retransmission based on the HARQ feedback is converted into blind retransmission.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 171 may be used for receiving and transmitting information or signals during a call, specifically, receiving downlink data from a base station and then processing the received downlink data by the processor 1710; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 171 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 171 may also communicate with networks and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 172, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.

The audio output unit 173 may convert audio data received by the radio frequency unit 171 or the network module 172 or stored in the memory 179 into an audio signal and output as sound. Also, the audio output unit 173 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal 170. The audio output unit 173 includes a speaker, a buzzer, a receiver, and the like.

The input unit 174 is for receiving an audio or video signal. The input unit 174 may include a graphics processor (Graphics Processing Unit, GPU) 1741 and a microphone 1742, the graphics processor 1741 processing image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 176. The image frames processed by the graphics processor 1741 may be stored in the memory 179 (or other storage medium) or transmitted via the radio frequency unit 171 or the network module 172. Microphone 1742 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 171 in the case of a telephone call mode.

The terminal 170 also includes at least one sensor 175, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 1761 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1761 and/or backlight when the terminal 170 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the terminal gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 175 may further 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 described herein.

The display unit 176 is used to display information input by a user or information provided to the user. The display unit 176 may include a display panel 1761, and the display panel 1761 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 177 may be used to receive input numerical or character information and to generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 177 includes a touch panel 1771 and other input devices 1772. The touch panel 1771, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 1771 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 1771 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth 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 detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 1710, and receives and executes a command sent from the processor 1710. In addition, the touch panel 1771 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 177 may include other input devices 1772 in addition to the touch panel 1771. Specifically, other input devices 1772 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 herein.

Further, the touch panel 1771 may be overlaid on the display panel 1761, and when the touch panel 1771 detects a touch operation thereon or thereabout, the touch panel is transferred to the processor 1710 to determine a type of touch event, and the processor 1710 then provides a corresponding visual output on the display panel 1761 according to the type of touch event. Although in fig. 17, the touch panel 1771 and the display panel 1761 are implemented as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 1771 may be integrated with the display panel 1761 to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 178 is an interface through which an external device is connected to the terminal 170. For example, the external devices may include a wired or wireless headset port, an external power (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. The interface unit 178 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 170 or may be used to transmit data between the terminal 170 and an external device.

Memory 179 may be used to store software programs as well as various data. The memory 179 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 179 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 1710 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 179 and calling data stored in the memory 179, thereby performing overall monitoring of the terminal. Processor 1710 can include one or more processing units; preferably, the processor 1710 can integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., and a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 1710.

The terminal 170 may further include a power source 1711 (e.g., a battery) for powering the various components, wherein the power source 1711 may be logically coupled to the processor 1710 via a power management system to facilitate charge, discharge, and power management functions via the power management system.

In addition, the terminal 170 includes some functional modules, which are not shown, and will not be described herein.

Preferably, referring to fig. 18, the embodiment of the present invention further provides a terminal 180, including a processor 181, a memory 182, and a computer program stored in the memory 182 and capable of running on the processor 181, where the computer program implements each process of the above-mentioned periodic resource selection method embodiment when executed by the processor 181, or implements each process of the above-mentioned sidelink transmission method embodiment when executed by the processor 181, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

The embodiment of the present invention further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements each process of the foregoing periodic resource selection method embodiment, or where the computer program when executed by a processor implements each process of the foregoing sidelink transmission method embodiment, and the same technical effect can be achieved, and for avoiding repetition, a description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or 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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. A periodic resource selection method applied to a terminal, comprising:

according to the periodic resource reservation rule information, carrying out periodic resource reservation or resource detection;

the periodic resource reservation rule information includes at least one of:

a resource reservation period, which is set according to a Transport Block (TB) transmission interval;

a target number M of resources reserved for one resource reservation period;

the resource reservation period is indicated by the target side link control information SCI;

the periodic resource reservation rule information comprises a resource reservation period, and the resource reservation period adopts physical resource or logic resource indication;

the frequency domain resources and the time domain resources of the periodically reserved resources satisfy at least one of the following:

the frequency domain resource reference position is a starting position of a frequency domain resource obtained from a resource indicated value indicated by the target SCI, or a lowest position of a lowest physical resource block or a subchannel of a physical side link control channel PSCCH, or a lowest position of a highest physical resource block or a subchannel of the PSCCH, or a lowest or highest physical resource block of the PSCCH is offset by n_offset resource units, and a lowest or highest subchannel of the PSCCH is offset by n_offset resource units, where n_offset is a predefined or preconfigured or configured value.

2. The method of claim 1, wherein the resource reservation period is a same value in a resource pool as the TB transmission interval.

3. The method of claim 1 wherein the resource reservation period is a preset code point if there is no value in the resource pool that is the same as the TB transmission interval.

4. The method of claim 1, wherein the target SCI is one of:

all SCIs associated with the currently transmitted TB;

one or more SCIs associated with the currently transmitted TB;

the first n transmissions of the currently transmitted TB are associated SCI;

5. The method of claim 4, wherein,

the value of n is a predefined or configured or preconfigured value, or the range of n is a predefined or configured or preconfigured value; and/or

6. The method of claim 4 wherein the resource reservation period indicated by SCIs other than the target SCI in the SCIs associated with the TB currently being transmitted is a preset code point.

7. The method of claim 1, wherein the target number of resources reserved M for the one resource reservation period is a minimum of:

8. The method of claim 7, wherein the M1 is configured in at least one of the following ways:

each resource pool;

each priority;

each terminal;

each link;

each transmission mode includes unicast, multicast and broadcast.

9. The method of claim 1, wherein the periodic resource reservation rule information comprises a location of periodically reserved resources.

10. The method of claim 9, wherein the location of the periodically reserved resources satisfies one of the following conditions:

where K is the total number of resources reserved by the terminal in one resource reservation period, and the target SCI is the SCI carrying the resource reservation period.

11. The method of claim 10, wherein,

if the M resources reserved in the period are the first M resources indicated by the target SCI in the current resource reservation period or the first M resources carrying the resource reservation period indication, and the number L1 of the target SCIs carrying the resource reservation period indication is less than or equal to M, the number of the resources reserved in one resource reservation period is L1.

12. The method of claim 10, wherein,

if the M resources reserved in the period are the first target SCI in the current resource reservation period and M resources in sequence after the time slot, and the number L2 of reserved resources indicated by the first target SCI is less than or equal to M, the number of resources reserved in one resource reservation period is L2.

13. The method of claim 1, wherein,

if the resource reservation period adopts physical resource indication and the reserved resource indicated by the target SCI is in the resource pool where the target SCI is located, the reserved resource is considered to be effective, otherwise, the reserved resource is considered to be ineffective; or alternatively

14. The method of claim 1, wherein,

the resource reserved periodically is the resource in the resource pool configured for the sending terminal of the target SCI, which is the nearest after the position of the resource reserved by the target SCI; or alternatively

The resources reserved periodically are available resources in a resource pool configured for the sending terminal, which is closest to the position of the resources reserved by the target SCI, wherein the available resources comprise at least one of the following: resources not reserved by other terminals, resources not reserved by the terminals, and resources not excluded.

15. The method of claim 1, wherein the resources at which the target SCI is located and the resources reserved for the cycle satisfy at least one of:

16. A terminal, comprising:

the periodic resource reservation rule information includes at least one of:

a target number M of resources reserved for one resource reservation period;

17. A terminal comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the periodic resource selection method of any of claims 1 to 15.

18. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the periodic resource selection method according to any of claims 1 to 15.