CN113141629A

CN113141629A - Periodic resource selection method, side link transmission method and terminal

Info

Publication number: CN113141629A
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: 2021-07-20
Anticipated expiration: 2040-01-20
Also published as: WO2021147852A1; CN113141629B

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, periodic resource reservation or resource detection is carried out; the periodic resource reservation rule information includes at least one of: a resource reservation period 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 the information understanding consistency according to the periodic reservation resource rule information and carry out periodic resource reservation or resource detection, thereby enabling other terminals to accurately eliminate the periodically reserved resources when selecting the resources, avoiding the problem of resource collision and improving 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 (LTE) system supports sidelink (sidelink, or translated into sidelink, or side link, etc.) from the 12 th release version, and is used for performing direct data transmission between terminal User equipments (UEs, hereinafter referred to as terminals) without using a network device.

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

In existing R16V 2X, a periodic reservation mechanism is defined, that is, a currently transmitted Transport Block (TB) can reserve resources for a subsequent TB period, but a specific periodic resource reservation rule is not defined, for example: 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, thereby causing a problem of resource collision.

Disclosure of Invention

The embodiment of the invention provides a periodic resource selection method, a sidelink transmission method and a terminal, which are used for solving the problem that the terminal in a sidelink system does not uniformly understand the rule of periodically reserved resources, so that the resource is not accurately eliminated when the resources are selected, and the resources are collided.

In order to solve the technical problem, 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, and includes: according to the periodic resource reservation rule information, periodic resource reservation or resource detection is carried out;

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

a resource reservation period 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 TB transmission indicates that the TB transmission needs feedback or PSFCH (packet switched channel) is enabled, retransmission based on HARQ (hybrid automatic repeat request) feedback is always adopted in the process of the TB transmission;

or

And if the preset condition is met, converting the retransmission based on the 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 resource reservation period set according to a TB transmission interval;

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 always use retransmission based on HARQ feedback in a TB transmission process if SCI associated with TB transmission indicates that the TB transmission needs feedback or PSFCH enabling;

or

And the second transmission module is used for converting the retransmission based on the 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, when executed by the processor, implements the steps of the periodic resource selection method in the first aspect.

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 operable on the processor, where the computer program, when executed by the processor, implements the steps of the sidelink transmission method according to the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the periodic resource selection method in the first aspect; alternatively, the computer program realizes the steps of the sidelink transmission method of the second aspect described above when executed by a processor.

In the embodiment of the invention, the terminal can keep the information understanding consistency according to the periodic reservation resource rule information and carry out periodic resource reservation or resource detection, thereby enabling other terminals to accurately eliminate the periodically reserved resources when selecting the resources, avoiding the problem of resource collision and improving 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 refer to like parts throughout the drawings. In the drawings:

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

FIG. 2 is a flowchart illustrating a periodic resource selection method according to an embodiment of the present invention;

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

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

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

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

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

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

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

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

fig. 11 is a diagram illustrating 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 diagram illustrating 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 diagram of a terminal according to yet another embodiment of the present invention;

fig. 17 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention;

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

Detailed Description

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, 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. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

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

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

The embodiment of the invention is mainly applied to the scene of connecting the terminals through 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 (PDA), a vehicle, or a Road Side Unit (RSU), and the like. Those skilled in the art will recognize that the words are not limiting.

Referring to fig. 2, fig. 2 is a flowchart illustrating 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, periodic resource reservation or resource detection is carried out;

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

a resource reservation period set according to a TB transmission interval;

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

And configuring whether the resource pool enables period reservation or not and configuring candidate values of some resource reservation periods by a high layer aiming at each resource pool, and indicating the resource reservation periods by the terminal through the target SCI.

It should be noted that performing periodic resource reservation or resource detection means that a transmitting terminal that transmits a target SCI performs periodic resource reservation according to periodic resource reservation rule information, and a receiving terminal that receives the target SCI performs resource detection according to the periodic resource reservation rule information, and in addition, the resource detection process 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 can be reserved per SCI is Nmax, where the maximum value of Nmax is 3. Nmax is a configurable value for each resource pool (resource pool), and is optionally 2 or 3. Further, the number of transmission of one TB is not limited in mode 1(mode 1), depending on the base station scheduling. One TB (including blind retransmission mode and HARQ-based retransmission mode), the maximum number of transmissions is 32 in mode 2(mode 2). Specifically RRC configured values. The RRC configures a maximum number of transmissions per priority based on each resource pool, each Channel Busy Rate (CBR) range.

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

The following describes the periodic resource reservation rule information in detail.

First, 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 a "Resource reservation period" indication field of the target SCI. The resource reservation period indicated by the indication field may be set by a 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 the subsequent TB, the terminal sets a 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 present invention, optionally, the resource reservation period indicated in the "resource reservation period" indication field of the target SCI 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 pre-configured value in the resource pool.

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

The 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 initial transmission and/or retransmission of the TB);

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

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

3) One or more SCIs associated with the currently transmitted TB, wherein the one or more SCIs at least comprise an initial transmission associated SCI 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 a 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 limit and/or a lower limit for n.

6) The SCI associated with the previous n transmissions of the currently transmitted TB (including the initial transmission and/or retransmission of the TB), where 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 limit and/or a lower limit for 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.

As mentioned above, the transmission of the TB may be divided into initial transmission and retransmission of the TB, and the selection and reservation of resources for the initial transmission and retransmission are 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, it is also supported to allocate resources to the initial transmission in an unreserved manner, i.e., based on the process of detection and resource selection.

2. With regard to 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, resources are reserved for retransmission, blind retransmission allocates a plurality of retransmission resources for a TB in advance, and a transmitting terminal (TX UE) transmits retransmission of the TB on all the retransmission resources allocated to the TB in advance.

In a retransmission mode based on HARQ feedback, reservation of resources for retransmission is supported. The retransmission based on the HARQ feedback is the primary transmission of the TB transmitted on the primary transmission resource allocated to the TB, if the receiving terminal demodulates successfully, an ACK (acknowledgement) is fed back, and the transmitting terminal does not retransmit the TB; if the receiving terminal fails in demodulation, NACK (negative acknowledgement) is fed back, and the transmitting terminal retransmits the TB on retransmission resources allocated for the TB.

In the embodiment of the invention, the n value can be different for blind retransmission and retransmission based on HARQ feedback. I.e. the n-values for blind retransmission and retransmission based on HARQ feedback are independently defined or independently pre-configured or independently configured.

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

Second, the periodic resource reservation rule information includes a target number M of resources reserved in a resource reservation period

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

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

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

That is, if M1 is greater than or equal to K, then M equals K, otherwise M equals M1.

Among them, the M1 reserved positions may be within one resource reservation period and may exceed the length of one resource reservation period, so that the resource reservation periods and the resources reserved by the resource reservation periods may overlap.

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

each resource pool (Per resource pool);

each priority (Per priority);

each terminal (Per UE);

per link (Per link);

each transmission mode (Per cast type), which includes unicast (unicast), multicast (groupcast) and broadcast (broadcast). The current sidelink transmission modes mainly include broadcast, multicast and unicast. Unicast, as the name implies, is a one-to-one transmission. Multicast there may be multiple groups in a one-to-many (one to any) transmission multicast. A broadcast is also a one-to-many (one to any) transmission, and the broadcast can consider that all UEs belong to one group and there are no multiple 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 mode.

And thirdly, the periodic resource reservation rule information comprises the target number M of the resources reserved in one resource reservation period and the position of the resources reserved in the period.

In this embodiment of the present invention, optionally, the position of the periodically reserved resource satisfies one of the following conditions:

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

in this 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 the target SCIs carrying the resource reservation period indication is L1 being less than or equal to M, the number of the 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 M resources (including the resource of the time slot where the SCI is located) in the sequence after the time slot;

in this embodiment of the present invention, optionally, if the M resources reserved in a cycle are a first target SCI and M resources sequentially after the first target SCI in the current resource reservation cycle, and the number L2 of reserved resources indicated by the first target SCI (including the resource of the slot where the SCI is located) is less than or equal to M, the number of resources reserved in one resource reservation cycle is L2.

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

4) the M resources reserved periodically are M resources randomly selected from the K resources;

5) the M resources reserved periodically 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 that sends the target SCI considers that the number of resources reserved in each resource reservation period is M, and considers that the positions of the reserved resources are defined as above. When the terminal receiving the target SCI performs resource detection, the number of resources reserved in each resource reservation period of other terminals is considered to be M, and the positions of the resources to be excluded are considered to be defined as 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 adopt a physical resource or a logical resource indication of a resource pool.

In Sidelink, the resource pool is defined as a pattern of some available resources at a higher layer, the pattern is periodically applied as an available resource of Sidelink, and physical resources corresponding to the available resource of Sidelink in time domain may be discontinuous.

Optionally, in some embodiments, if the resource reservation period adopts a 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

And if the resource reservation period adopts physical resource indication and the reserved resource indicated by the target SCI is located in a resource pool configured for the transmitting terminal of the target SCI, considering the reserved resource to be valid, otherwise, considering the reserved resource to be invalid, wherein the resource pool configured for the transmitting terminal of the target SCI comprises the resource pool where the target SCI is located and other available resource pools configured for the transmitting terminal.

The resource pool configured for the sending terminal may include: the resource pool where 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 and the reserved resources (which may be partially in resource pool 1 and partially in resource pool 2) are located in resource pool 2 (a resource pool different from resource pool 1) of the terminal, the terminal considers the resources located in resource pool 2 as the resource reservation of the terminal in resource pool 2. Other terminals, upon detection, consider that the terminal has reserved the part of resources in the resource pool 2.

The following describes the positional relationship between the periodically reserved resources and the reserved resources indicated by the target SCI.

Optionally, in some embodiments, the periodically reserved resource is a resource in a resource pool configured for the sending terminal, which is the closest resource position after the resource position reserved for the target SCI. The resource pool configured for the sending terminal may include: the resource pool where 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, which is the closest resource after the resource location reserved by the target SCI, and the available resource includes at least one of: resources that are not reserved by other terminals, resources that are not reserved by the resources of the terminals (e.g., other processes periodically or aperiodically reserved resources), and, resources that are not excluded. The resource pool configured for the sending terminal may include: the resource pool where the target SCI is located, and/or other available resource pools configured for the sending terminal.

Optionally, the resource where the target SCI is located and the resource reserved periodically satisfy at least one of the following:

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

that is, if the reserved resource is located in another resource pool, the reserved resource is considered invalid.

2) The resources where the target SCI is located and the periodically reserved resources 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 resources is: one slot, or 1ms, or a plurality of predefined or configured or preconfigured slots, or the maximum or minimum number of time domain resources in a single resource reserved for the currently transmitted TB;

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

the unit of the frequency domain Resource is a Physical Resource Block (PRB) or a subchannel (subchannel);

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

Currently, a terminal is supported to simultaneously support blind retransmission and reselection based on HARQ feedback, but how to simultaneously support blind retransmission and reselection based on HARQ feedback is not specified.

To solve the above problem, referring to fig. 3, the present invention further provides a sidelink transmission method, applied to a terminal, including:

step 31: if the SCI associated with TB transmission indicates that the TB transmission requires feedback or Physical Sidelink Feedback Channel (PSFCH) enablement, retransmission based on HARQ feedback is always employed in the TB transmission process.

In the embodiment of the invention, when the terminal can simultaneously support blind retransmission and reselection based on HARQ feedback, if the TB transmission needs to be fed back or PSFCH is enabled, retransmission based on HARQ feedback is adopted all the time, namely after the retransmission based on HARQ feedback is converted, blind retransmission is not supported any more.

In some embodiments of the present invention, optionally, further comprising: another HARQ feedback based retransmission of the TB may be sent before NACK feedback information is received or no ACK feedback information is received.

To solve the above problem, referring to fig. 4, the present invention further provides a sidelink transmission method, applied to a terminal, including:

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

In the embodiment of the invention, when the terminal can simultaneously support blind retransmission and reselection based on HARQ feedback, the terminal can be switched from the reselection based on the HARQ feedback to the blind retransmission.

Optionally, if the predetermined condition is satisfied, the switching from retransmission based on HARQ feedback to blind retransmission includes:

if the predetermined condition is satisfied, the SCI of the scheduling TB indicates that PSFCH is not enabled.

Optionally, the preset condition includes at least one of:

receiving no ACK feedback information (including DTX) for L consecutive feedback times, wherein L is a predefined or preconfigured or configured value;

receiving or continuously receiving L1 NACK feedback information, the L1 being a predefined or preconfigured or configured value;

l2 retransmissions are sent or sent consecutively, 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 value T _ thresh, which is a predefined or preconfigured or configured value.

The remaining time of the TB transmission/total time of 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 switching from retransmission based on HARQ feedback to blind retransmission includes: retransmission of the TB (including blind retransmission and retransmission based on HARQ feedback) is not sent until NACK feedback information is received or no ACK feedback information is received.

In some embodiments of the present invention, optionally, the switching from retransmission based on HARQ feedback to blind retransmission includes: and before NACK feedback information is received or ACK feedback information is not received, blind retransmission of the TB is sent, but retransmission based on HARQ feedback is not sent, so that the resource utilization rate is improved.

The above method is illustrated below with reference to specific examples.

The first embodiment of the invention:

the number of reserved resources in each resource reservation period is preconfigured to be 5 in a resource pool (resource pool), 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 SCI carrying period indication. In the embodiment of the present invention, one SCI indicates three resources.

Embodiment two of the present invention:

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

The third embodiment of the invention:

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

The fourth embodiment of the present invention:

referring to fig. 8, assuming that the configured subcarrier spacing is 15kHz, the higher layer configures the sidelink resource pool, which includes physical time slots 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 the indication of the reserved resource period, the reserved resource period is obtained to be P (6ms) according to the indication information and the high-level configuration information, and the reserved resource period P is applied to the logic time slot resource of sidelink.

Embodiment five of the present invention:

referring to fig. 9, assuming that the configured subcarrier spacing is 15kHz, the higher layer configures the sidelink resource pool, which includes physical time slots 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, the reserved resource period is obtained to be P (6ms) according to the indication information and the high-level configuration information, and the reserved resource period P is applied to physical time slot resources.

If the reserved resource is not in the sidelink resource pool, the reserved resource is considered invalid. I.e. reserved resources are 1,11,31,36 (physical resource number). 6,16,21,26 (physical resource number) are invalid resources, considered unreserved.

Sixth embodiment of the present invention:

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

When resource reservation is performed, if the physical slot reserved resource is not in the sidelink resource pool (for example, the physical resource numbered 6), the reserved resource is the next available resource in the resource pool (i.e., the physical resource numbered 8). I.e. the reserved resources are 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).

Seventh embodiment of the present invention:

if the SCI associated with TB transmission indicates that the TB transmission requires feedback or PSFCH enable, retransmission based on HARQ feedback is always employed in the TB transmission process. I.e. after a transition to retransmission based on HARQ feedback, blind retransmission is no longer supported.

Eighth embodiment of the present invention:

referring to fig. 11, it can be seen from (a) and (b) of fig. 11 that the 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.

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

Ninth embodiment of the present invention:

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

Tenth embodiment of the present invention:

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

Referring to fig. 14, an 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 resource reservation period set according to a TB transmission interval;

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 resource pool does not have the same value as the TB transmission interval, 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, wherein the one or more SCIs at least comprise an initial transmission associated SCI of the currently transmitted TB;

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

SCI associated with the previous n transmissions of the currently transmitted TB;

the associated SCI is transmitted the first n times of the currently transmitted TB, and n is a value not 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 except the target SCI in the SCIs associated with the currently transmitted TB is a preset code point.

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

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

the total number K of resources reserved in a resource reservation period for the TB scheduled for the target SCI.

Optionally, the M1 is configured in at least one of the following manners:

each resource pool;

each priority level;

each terminal;

each link;

each transmission mode comprises unicast, multicast and broadcast.

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

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

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

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

the M resources reserved periodically are the first M resources in the K resources;

the M resources reserved periodically are M resources randomly selected from the K resources;

the M resources reserved periodically 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 resources reserved in one resource reservation period is L1.

Optionally, if the M resources reserved in the period are the first target SCI and M resources sequentially after the time slot of the first target SCI 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 adopts a physical resource or a logical resource indication.

Optionally, if the resource reservation period adopts a 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

Optionally, the resource reserved periodically is a resource in a resource pool configured for the sending terminal, which is the closest after the resource position reserved for the target SCI; or

The periodically reserved resource is an available resource in a resource pool configured for the sending terminal, the available resource is the nearest resource after the resource position reserved by the target SCI, and the available resource comprises at least one of the following resources: resources not reserved by other terminals, resources not reserved by resources of said terminals, and, resources not excluded.

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

the resources where the target SCI is located and the periodically reserved resources 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 following:

the frequency domain resource size is: the size value of the frequency domain resource obtained in 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 resource reserved for the current transmission 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 in fig. 2, and is not described herein again in order to avoid repetition.

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

a first transmission module 151, configured to, if it is indicated in an SCI associated with TB transmission that the TB transmission requires feedback or PSFCH enabling, always adopt retransmission based on HARQ feedback in the TB transmission process;

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

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

receiving no ACK feedback information within continuous L feedback time, wherein 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 preconfigured or configured value,

Optionally, the second transmission module 161 is configured to send the blind retransmission of the TB before receiving the NACK feedback information or receiving no 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 is not described herein again to avoid repetition.

Fig. 17 is a schematic diagram of a hardware structure of a terminal for 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 supply 1711. Those skilled in the art will appreciate that the terminal configuration shown in fig. 17 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some 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 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 resource reservation period set according to a TB transmission interval;

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

Alternatively, the first and second electrodes may be,

a processor 1710, configured to, if SCI associated with TB transmission indicates that the TB transmission requires feedback or PSFCH enabling, always adopt retransmission based on HARQ feedback in the TB transmission process; or if the preset condition is met, switching the retransmission based on the HARQ feedback into blind retransmission.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 171 may be configured to receive and transmit signals during a message transmission and reception process or a call process, and specifically, receive downlink data from a base station and then process the received downlink data to the processor 1710; in addition, the uplink data is transmitted to the base station. Generally, 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 a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 172, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

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 related to a specific function performed by the terminal 170 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 173 includes a speaker, a buzzer, a receiver, and the like.

The input unit 174 is used to receive an audio or video signal. The input Unit 174 may include a Graphics Processing Unit (GPU) 1741 and a microphone 1742, and the Graphics processor 1741 processes 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 graphic 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. The 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 transmittable to a mobile communication base station via the radio frequency unit 171 in case of the phone call mode.

The terminal 170 also includes at least one sensor 175, 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 1761 according to the brightness of ambient light, and a proximity sensor that turns off the display 1761 and/or a backlight when the terminal 170 is moved 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 175 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 will not be described in detail herein.

The display unit 176 is used to display information input by the 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 (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 177 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 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 by a user on or near the touch panel 1771 (e.g., operations by a user on or near the touch panel 1771 using a finger, a stylus, or any suitable object or attachment). The touch panel 1771 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 detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1710, and receives and executes commands sent by the processor 1710. In addition, the touch panel 1771 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1771, the user input unit 177 may also include other input devices 1772. In particular, 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 in detail herein.

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

The interface unit 178 is an interface for connecting an external device to the terminal 170. 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. 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.

The memory 179 may be used to store software programs as well as various data. The memory 179 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program 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, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the 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 the 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 operating 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 may include one or more processing units; preferably, the processor 1710 can integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 1710.

The terminal 170 may also include a power supply 1711 (e.g., a battery) for powering the various components, and preferably, the power supply 1711 may be logically coupled to the processor 1710 via a power management system that may be configured to manage charging, discharging, and power consumption.

In addition, the terminal 170 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, referring to fig. 18, an 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 is executed by the processor 181 to implement each process of the above-mentioned embodiment of the periodic resource selection method, or the computer program is executed by the processor 181 to implement each process of the above-mentioned embodiment of the sidelink transmission method, and can achieve the same technical effect, and in order to avoid repetition, it is not described herein again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned embodiment of the periodic resource selection method, or when the computer program is executed by a processor, the computer program implements each process of the above-mentioned embodiment of the sidelink transmission method, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be 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 phrase "comprising an … …" does not exclude the presence of other like elements 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 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 method 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. A periodic resource selection method is applied to a terminal and is characterized by comprising the following steps:

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

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

a resource reservation period, which is set according to a transmission block TB transmission interval;

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

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 a resource pool that is the same as the TB transmission interval.

4. The method of claim 1, wherein the resource reservation period is indicated by target Sidelink Control Information (SCI).

5. The method of claim 4, 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;

6. The method of claim 5,

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

7. The method of claim 5, wherein the resource reservation period indicated by SCIs other than the target SCI in SCIs associated with the current transmitted TB is a preset code point.

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

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

each resource pool;

each priority level;

each terminal;

each link;

each transmission mode comprises unicast, multicast and broadcast.

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

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

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

12. The method of claim 11,

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 resources reserved in one resource reservation period is L1.

13. The method of claim 11,

if the M resources reserved in a period are the first target SCI and M resources sequentially after the time slot of the first target SCI 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.

14. The method of claim 4, wherein the periodic resource reservation rule information comprises a resource reservation period, the resource reservation period employing a physical resource or logical resource indication.

15. The method of claim 14,

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

16. The method of claim 4,

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

The periodically reserved resource is an available resource in a resource pool configured for the sending terminal, the available resource is the nearest resource after the position of the resource reserved by the target SCI, and the available resource comprises at least one of the following resources: resources not reserved by other terminals, resources not reserved by resources of said terminals, and, resources not excluded.

17. The method of claim 4, wherein the resources where the target SCI is located and the periodically reserved resources satisfy at least one of:

18. The method of claim 4, wherein frequency domain resources and time domain resources of the periodically reserved resources satisfy at least one of:

the frequency domain resource reference position is a starting position of the obtained frequency domain resource in the resource indication value indicated by the target SCI, or a lowest position of a lowest physical resource block or subchannel of a physical sidelink control channel PSCCH, or a lowest position of a highest physical resource block or subchannel of the PSCCH, or a lowest or highest physical resource block offset by n _ offset resource units of the PSCCH, and a lowest or highest subchannel offset by n _ offset resource units of the PSCCH, where n _ offset is a predefined or preconfigured or configured value.

19. A side link transmission method is applied to a terminal, and is characterized by comprising the following steps:

if the SCI associated with TB transmission indicates that the TB transmission needs feedback or PSFCH (packet switched channel) is enabled, retransmitting based on hybrid automatic repeat request (HARQ) feedback in the process of the TB transmission;

or

20. The method of claim 19, wherein the preset condition comprises at least one of:

receiving no ACK feedback information within L continuous feedback time, wherein L is a predefined or preconfigured or configured value;

receiving or continuously receiving L1 Negative Acknowledgement (NACK) feedback information, the L1 being 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 preconfigured or configured value,

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

21. The method of claim 19, wherein the transitioning from retransmission based on HARQ feedback to blind retransmission comprises:

and sending the blind retransmission of the TB before receiving NACK feedback information or not receiving ACK feedback information.

22. A terminal, comprising:

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

a resource reservation period set according to a TB transmission interval;

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

23. A terminal, comprising:

or

24. A terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the periodic resource selection method according to any one of claims 1 to 18.

25. A terminal comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the sidelink transmission method as claimed in any one of claims 19 to 21.

26. 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 periodic resource selection method according to any one of claims 1 to 18; alternatively, the computer program when executed by a processor implements the steps of the sidelink transmission method as claimed in any one of claims 19 to 21.