WO2021147852A1 - 周期资源选择方法、旁链路传输方法及终端 - Google Patents

周期资源选择方法、旁链路传输方法及终端 Download PDF

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Publication number
WO2021147852A1
WO2021147852A1 PCT/CN2021/072686 CN2021072686W WO2021147852A1 WO 2021147852 A1 WO2021147852 A1 WO 2021147852A1 CN 2021072686 W CN2021072686 W CN 2021072686W WO 2021147852 A1 WO2021147852 A1 WO 2021147852A1
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resource
resources
reserved
sci
resource reservation
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PCT/CN2021/072686
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English (en)
French (fr)
Inventor
彭淑燕
纪子超
姜炜
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维沃移动通信有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0294—Traffic management, e.g. flow control or congestion control forcing collision
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation

Definitions

  • the embodiment of the present invention relates to the field of wireless communication technology, and in particular to a method for selecting periodic resources, a method for side link transmission, and a terminal.
  • LTE Long Term Evolution
  • LTE sidelink is suitable for specific public safety affairs (such as emergency communication in fire sites or disaster sites such as earthquakes), or vehicle to everything (V2X) communications.
  • IoV communications include various services, such as basic safety communications, advanced (autonomous) driving, formation, sensor expansion, and so on. Since LTE sidelink only supports broadcast communications, it is mainly used for basic security communications. Other advanced V2X services that have strict Quality of Service (QoS) requirements in terms of delay and reliability will pass through the New Radio (New Radio, NR) sidelink support.
  • QoS Quality of Service
  • a periodic reservation mechanism that is, the currently transmitted Transport Block (TB) can reserve resources for the subsequent TB period, but no specific periodic resource reservation rules are defined, such as reserved side A resource where the link control information (Sidelink Control Information, SCI) is located, or all resources reserved by the SCI indication, if the periodic resource reservation rules are not defined, different terminals may have different understandings during detection, so When selecting resources, the resource exclusion is inaccurate, which leads to the problem of resource collision.
  • SCI Servicelink Control Information
  • the embodiment of the present invention provides a periodic resource selection method, a side link transmission method, and a terminal, which are used to solve the problem that the terminal in the side link system does not have a unified understanding of the rules of periodic resource reservation, which makes the resource exclusion inaccurate when selecting resources. , Leading to resource collision problems.
  • the present invention is implemented as follows:
  • an embodiment of the present invention provides a periodic resource selection method, which is applied to a terminal, and includes: performing periodic resource reservation or resource detection according to periodic resource reservation rule information;
  • the periodic resource reservation rule information includes at least one of the following:
  • a resource reservation period where the resource reservation period is set according to the TB transmission interval
  • the target number M of resources reserved in a resource reservation period is the target number M of resources reserved in a resource reservation period.
  • an embodiment of the present invention provides a side link transmission method, which is applied to a terminal, and includes:
  • the retransmission based on HARQ feedback is converted to blind retransmission.
  • an embodiment of the present invention provides a terminal, including:
  • the processing module is used to perform periodic resource reservation or resource detection according to periodic resource reservation rule information
  • the periodic resource reservation rule information includes at least one of the following:
  • a resource reservation period where the resource reservation period is set according to the TB transmission interval
  • the target number M of resources reserved in a resource reservation period is the target number M of resources reserved in a resource reservation period.
  • an embodiment of the present invention provides a terminal, including:
  • the first transmission module is configured to, if the SCI associated with TB transmission indicates that the TB transmission requires feedback or the physical side link feedback channel PSFCH is enabled, then retransmission based on HARQ feedback is always used during the TB transmission ;
  • the second transmission module is configured to switch from retransmission based on HARQ feedback to blind retransmission if the preset condition is met.
  • an embodiment of the present invention provides a terminal including a processor, a memory, and a computer program stored on the memory and running on the processor.
  • the computer program is executed by the processor, The steps of the method for selecting periodic resources of the first aspect are implemented.
  • an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored on the memory and running on the processor.
  • the computer program is executed by the processor, Steps for implementing the side link transmission method of the second aspect described above.
  • an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the method for selecting periodic resources in the first aspect is implemented. Steps; or, when the computer program is executed by a processor, the steps of the side link transmission method of the second aspect described above are implemented.
  • the terminal can maintain a consistent understanding of the information according to the periodic resource reservation rule information, and perform periodic resource reservation or resource detection, so that other terminals can accurately exclude resources that have been periodically reserved when selecting resources. Avoiding the problem of resource collision can improve the reliability of data transmission by the terminal.
  • FIG. 1 is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for selecting periodic resources according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a side link transmission method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a side link transmission method according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a method for selecting periodic resources according to the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a periodic resource selection method according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a periodic resource selection method according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic diagram of a method for selecting periodic resources according to the fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a periodic resource selection method according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic diagram of a method for selecting periodic resources according to the sixth embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a side link transmission method according to Embodiment 7 of the present invention.
  • FIG. 12 is a schematic diagram of a side link transmission method according to Embodiment 8 of the present invention.
  • FIG. 13 is a schematic diagram of a side link transmission method according to Embodiment 9 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 another embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a terminal according to 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.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present invention should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the wireless communication system may include: a network-side device 11 and a plurality of terminals 12.
  • the terminal 12 may be connected to the network-side device 11 through uplink and downlink links, and the terminals 12 may Connect by sidelink.
  • the embodiment of the present invention is mainly applied to a scenario where terminals are connected through a side connection.
  • the terminal 12 provided by 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 roadside Unit (RSU, road side unit), etc.
  • UMPC Ultra-Mobile Personal Computer
  • PDA Personal Digital Assistant
  • vehicle or a roadside Unit (RSU, road side unit), etc.
  • RSU roadside Unit
  • FIG. 2 is a schematic flowchart of a periodic resource selection method according to an embodiment of the present invention.
  • the periodic resource selection method is applied to a terminal and includes:
  • Step 21 Perform periodic resource reservation or resource detection according to periodic resource reservation rule information
  • the periodic resource reservation rule information includes at least one of the following:
  • a resource reservation period where the resource reservation period is set according to the TB transmission interval
  • the target number M of resources reserved in a resource reservation period is the target number M of resources reserved in a resource reservation period.
  • the terminal can maintain a consistent understanding of the information according to the periodic resource reservation rule information, and perform periodic resource reservation or resource detection, so that other terminals can accurately exclude resources that have been periodically reserved when selecting resources.
  • the problem of resource collision can improve the reliability of data transmission by the terminal.
  • the upper layer configures whether the resource pool enables periodic reservation and configures some candidate values of the resource reservation period, and the terminal indicates the resource reservation period through the target SCI.
  • performing periodic resource reservation or resource detection means that the sending terminal sending the target SCI performs periodic resource reservation according to the periodic resource reservation rule information, while the receiving terminal receiving the target SCI performs periodic resource reservation based on the periodic resource reservation.
  • the rule information is reserved for resource detection.
  • the resource detection process does not only detect periodic resources.
  • the resource reservation period is indicated by the target SCI, and the maximum number of resources that can be reserved for each SCI is Nmax, where the maximum value of Nmax is 3.
  • Nmax is a configurable value for each resource pool, and the optional value is 2 or 3.
  • the number of transmissions of one TB is not limited in mode 1 and depends on the scheduling of the base station.
  • the maximum number of transmissions in mode 2 (mode 2) is 32. Specifically, it is the value configured by RRC.
  • RRC is based on each resource pool, each channel busy rate (Channel Busy Ratio, CBR) range, and each priority is configured with the maximum number of transmissions.
  • CBR Channel Busy Ratio
  • the periodic resource reservation rule information may be predefined, pre-configured, configured, or indicated by the target SCI.
  • Periodic resource reservation rule information includes resource reservation period
  • 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 sending terminal of the target SCI.
  • the resource reservation period is set according to the TB transmission interval. That is, when the upper layer enables to reserve periodic resources for the subsequent TB, the terminal sets the resource reservation period in the target SCI according to the TB transmission interval provided by the higher layer.
  • the value of multiple resource reservation periods is configured or pre-configured in the resource pool configured for the terminal, for example, the value of 16 resource reservation periods.
  • 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.
  • the protocol stipulates that the TB transmission interval provided by the higher layer is a configured or pre-configured value in the resource pool.
  • the resource reservation period is a preset code point.
  • the resource reservation period corresponding to the preset code point may be 0, for example, or no period reservation is performed.
  • the target SCI is one of the following:
  • One or more SCIs associated with the currently transmitted TB (including the initial transmission and/or retransmission of the TB);
  • the one or more SCIs are determined by the sending terminal of the SCI.
  • One or more SCIs associated with the currently transmitted TB include at least the SCI associated with the initial transmission of the currently transmitted TB;
  • the one or more SCIs are determined by the sending terminal of the SCI.
  • n is a pre-defined or configured or pre-configured value, or the range of n is a pre-defined or configured or pre-configured value;
  • the range of n may include the upper limit and/or lower limit of n.
  • n is a pre-defined or configured or pre-configured value, or the range of n is a pre-defined or configured or pre-configured value;
  • the range of n may include the upper limit and/or lower limit of n.
  • the value of M_reserved is a pre-defined or configured or pre-configured value, or the range of M_reserved is a pre-defined or configured or pre-configured value.
  • the range of M_reserved may include the upper limit and/or the lower limit of M_reserved.
  • TB transmission can be divided into TB initial transmission and retransmission.
  • the selection and reservation of resources for initial transmission and retransmission are described below.
  • the SCI supporting the currently transmitted TB reserves resources for the initial transmission cycle of the subsequent TB.
  • R16V2X also supports the allocation of resources for the initial transmission based on the non-reservation method, that is, the allocation of resources for the initial transmission based on the process of detection and resource selection.
  • R16 two retransmission modes are supported, one is blind retransmission and the other is HARQ based retransmission.
  • blind retransmission means that multiple retransmission resources are allocated to a TB in advance, and the transmitting terminal (TX UE) transmits the TB's data on all retransmission resources pre-allocated to the TB. Retransmission.
  • the retransmission mode based on HARQ feedback is the transmission of the initial transmission of the TB on the initial transmission resources allocated for the TB. If the receiving terminal is successfully demodulated, an ACK (confirmed confirmation) is fed back, and the transmitting terminal does not retransmit the TB; If the receiving terminal fails to demodulate, a NACK (Negative Acknowledgement) is fed back, and the sending terminal retransmits the TB on the retransmission resources allocated for the TB.
  • NACK Negative Acknowledgement
  • n value may be different. That is, the value of n for blind retransmission and retransmission based on HARQ feedback is independently defined or independently pre-configured or independently configured.
  • the resource reservation period indicated by the SCI other than 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 is performed.
  • Periodic resource reservation rule information includes the target number M of resources reserved in a resource reservation period
  • the target number M of resources reserved in one resource reservation period is the smallest of the following two:
  • the total number K of resources reserved for the terminal in a resource reservation period is the total number K of resources reserved for the terminal in a resource reservation period.
  • the M1 reserved positions may be within a resource reservation period or may exceed the length of a resource reservation period, so that the resources reserved for the resource reservation period and the resource reservation period may overlap.
  • the configuration mode of M1 is at least one of the following:
  • Each resource pool (Per resource pool);
  • Each terminal Per UE
  • the transmission mode For each transmission mode (Percast type), the transmission mode includes unicast, groupcast and broadcast.
  • the current sidelink transmission methods are mainly divided into broadcast, multicast, and unicast.
  • Unicast as its name implies, is one-to-one transmission.
  • Multicast is one-to-many (one-to-many) transmission There may be multiple groups in multicast. Broadcasting is also a one-to-many transmission. Broadcasting can be considered that all UEs belong to one group, and there are no multiple groups.
  • the corresponding M1 can be configured for each resource pool or each priority or each terminal or each link or each transmission mode.
  • Periodic resource reservation rule information includes the target number M of resources reserved in a resource reservation period, and the location of the resources reserved in the period.
  • the location 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 periodically reserved M resources are the first M resources indicated by the target SCI in the current resource reservation period or carry the first M resources indicated by the resource reservation period, and
  • the carrying resource reservation period indicates that the number of target SCIs is L1 less than or equal to M, and the number of resources reserved in one resource reservation period is L1.
  • the periodic reserved M resources are the first target SCI in the current resource reservation period and the M resources in sequence after the time slot (including the resources of the time slot where the SCI is located);
  • the M resources reserved periodically are the first target SCI in the current resource reservation period and the M resources in sequence after the time slot, and the first target SCI is The indicated number of reserved resources L2 (including the resources of the time slot where the SCI is located) is less than or equal to M, then the number of resources reserved in one resource reservation period is L2.
  • the M resources reserved periodically are the first M resources among 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 among the K resources;
  • K is the total number of resources reserved for the terminal in a resource reservation period.
  • the terminal sending the target SCI considers that the number of resources reserved in each resource reservation period is M, and considers that the location of the reserved resources is as defined above.
  • the terminal receiving the target SCI performs resource detection, it is considered that the number of resources reserved by other terminals in each resource reservation period is M, and the locations of resources that need to be excluded are considered as defined above.
  • the resource reservation period may be indicated by physical resources or logical resources of the resource pool.
  • the resource pool is defined as the patterns of some available resources at the higher level. These patterns are applied periodically as the available resources of the sidelink.
  • the available resources of the sidelink may be discontinuous in the time domain corresponding to the physical resources.
  • the reserved resource is considered valid. Otherwise, the reserved resources are deemed invalid; or
  • the resource pool configured for the sending terminal of the target SCI includes the resource pool where the target SCI is located and other available resource pools configured for the sending 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.
  • the reserved resources may be part of resource pool 1 and part of resource pool 2) are located in resource pool 2 of the terminal (a resource pool different from resource pool 1) .
  • the terminal considers that the resources located in the resource pool 2 are reserved for the terminal's resources in the resource pool 2.
  • other terminals are detecting, they think that the terminal has reserved this 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.
  • the periodically reserved resource is a resource in the resource pool configured for the sending terminal that is closest to the resource position reserved by 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.
  • the periodically reserved resource is an available resource in the resource pool configured for the sending terminal that is closest to the resource position reserved by the target SCI, and the available resource includes at least the following One: resources not reserved by other terminals, resources not reserved by the resources of the terminal (for example, resources reserved periodically or non-periodically by other processes), and resources 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.
  • the resource where the target SCI is located and the periodically reserved resource satisfy at least one of the following:
  • the reserved resource is located in another resource pool, the reserved resource is considered invalid.
  • At least two resources are located in different resource pools.
  • the frequency domain resources and the time domain resources of the periodically reserved resources satisfy at least one of the following:
  • the granularity of time domain resources is: one time slot, or 1ms, or multiple time slots that are predefined or configured or pre-configured, or the largest or smallest time domain resource among the single resources reserved for the TB currently transmitted number;
  • the frequency domain resource size is: the frequency domain resource size value obtained from the resource indicator value (RIV), or the entire frequency domain resource of the resource pool, or the maximum or minimum resource reserved for the TB currently transmitted Number of frequency domain resources;
  • the unit of frequency domain resources is physical resource block (Physical Resource Block, PRB) or subchannel (subchannel);
  • PRB Physical Resource Block
  • subchannel subchannel
  • the frequency domain resource reference position is the starting position of the frequency domain resource obtained from the resource indicator value indicated by the target SCI, or the lowest physical resource block of the PSCCH or the lowest position of the subchannel, or the highest physical resource block of the PSCCH or The lowest position of the subchannel, or the lowest or highest physical resource block offset of the PSCCH by n_offset resource units, and the lowest or highest subchannel offset of the PSCCH by n_offset resource units, where n_offset is a predefined or preconfigured or configured value.
  • supporting terminals support both blind retransmission and HARQ feedback-based reselection, but there is no provision on how to support blind retransmission and HARQ feedback-based reselection at the same time.
  • the present invention also provides a side link transmission method applied to a terminal, including:
  • Step 31 If the SCI associated with the TB transmission indicates that the TB transmission requires feedback or the physical side link feedback channel (PSFCH) is enabled, retransmission based on HARQ feedback is always used during the TB transmission.
  • PSFCH physical side link feedback channel
  • the terminal when the terminal can support blind retransmission and HARQ feedback-based reselection at the same time, if it indicates that TB transmission requires feedback or PSFCH enablement, it will always use HARQ feedback-based retransmission, that is, switch to HARQ-based retransmission. After HARQ feedback is retransmitted, blind retransmission is no longer supported.
  • it further includes: before receiving NACK feedback information or not receiving ACK feedback information, another HARQ feedback-based retransmission of the TB may be sent.
  • the present invention also provides a side link transmission method applied to a terminal, including:
  • Step 41 If the preset condition is met, the retransmission based on HARQ feedback is converted to blind retransmission.
  • the terminal when the terminal can support blind retransmission and reselection based on HARQ feedback at the same time, the reselection based on HARQ feedback can be converted to blind retransmission.
  • the conversion from HARQ feedback-based retransmission to blind retransmission includes:
  • the SCI of the scheduling TB indicates that the PSFCH is disabled.
  • the preset condition includes at least one of the following:
  • ACK feedback information (including DTX) is not received within L continuous feedback time, where L is a predefined or preconfigured or configured value;
  • L1 pieces of NACK feedback information are received or continuously received, where L1 is a pre-defined or pre-configured or configured value;
  • L2 retransmissions are sent or sent continuously, where L2 is a pre-defined or pre-configured or configured value
  • the remaining time (remaining PDB time) of the TB transmission is less than or equal to the time threshold T_thresh, and the T_thresh is a pre-defined or pre-configured or configured value.
  • the remaining time of the TB transmission/total time of the TB transmission is less than or equal to x%, and the x% is a pre-defined or pre-configured or configured value.
  • the conversion from HARQ feedback-based retransmission to blind retransmission includes: not sending the TB until NACK feedback information is received or ACK feedback information is not received.
  • Retransmission (including blind retransmission and retransmission based on HARQ feedback).
  • the conversion from HARQ feedback-based retransmission to blind retransmission includes: before receiving NACK feedback information or not receiving ACK feedback information, sending the TB Blind retransmission, but does not send retransmission based on HARQ feedback, thereby improving resource utilization.
  • it further includes: before receiving NACK feedback information or not receiving ACK feedback information, another HARQ feedback-based retransmission of the TB may be sent.
  • Embodiment 1 of the present invention is a diagrammatic representation of Embodiment 1 of the present invention.
  • the number of resources reserved in each resource reservation period is pre-configured in the resource pool to 5. Please refer to Figure 5, the terminal reserves the first 5 reserved resources indicated by the target SCI in the current resource reservation period.
  • the target SCI is the SCI carrying the cycle indicator.
  • one SCI indicates three resources.
  • Embodiment 2 of the present invention is a diagrammatic representation of Embodiment 2 of the present invention.
  • the number of resources reserved in each resource reservation period is pre-configured in the resource pool to 5. Please refer to Figure 6.
  • the terminal reserves the first target SCI in the previous source reservation period and the first 5 reservations thereafter. resource.
  • the target SCI is the SCI carrying the cycle indicator.
  • one SCI indicates three resources.
  • 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 upper layer configures the sidelink resource pool, including physical time slots 0-3, 8-14, 17-19, 22-25, 30, 31, 33, 34, 36-39 . Renumbered as logical time slot resources 0-25 on the sidelink.
  • the SCI carries a reserved resource period indication.
  • the reserved resource period is P (6ms), and the reserved resource period P is applied to the logical time slot resources of the sidelink.
  • Embodiment 5 of the present invention is a diagrammatic representation of Embodiment 5 of the present invention.
  • the upper layer configures the sidelink resource pool, including physical time slots 0-3, 8-14, 17-19, 22-25, 30, 31, 33, 34, 36-39 . Renumbered as logical time slot resources 0-25 on the sidelink.
  • the SCI carries an indication of the reserved resource period.
  • the reserved resource period is P (6ms), and the reserved resource period P is applied to physical time slot resources.
  • the reserved resource is not in the sidelink resource pool, the reserved resource is considered invalid. That is, the reserved resources are 1, 11, 31, 36 (physical resource number). 6, 16, 21, and 26 (physical resource numbers) are invalid resources and are considered not to be reserved.
  • the upper layer configures the sidelink resource pool, including physical time slots 0-3, 8-14, 17-19, 22-25, 30, 31, 33, 34, 36-39 . Renumbered as logical time slot resources 0-25 on the sidelink.
  • the SCI carries an indication of the reserved resource period.
  • the reserved resource period is P (6ms), and the reserved resource period P is applied to physical time slot resources.
  • the reserved resource is the next available resource in the resource pool (that is, the physical resource numbered 8) . That is, the reserved resources are 1, 8, 11, 17, 22, 30, 31, 38 (physical time slot resource number), that is, 1, 4, 7, 11, 14, 18, 19, 22 (logical resource number ).
  • the HARQ feedback-based retransmission is always used during the TB transmission. That is, after conversion to retransmission based on HARQ feedback, blind retransmission is no longer supported.
  • Embodiment 8 of the present invention is a diagrammatic representation of Embodiment 8 of the present invention.
  • Embodiment 9 of the present invention is a diagrammatic representation of Embodiment 9 of the present invention.
  • FIG. 12 it can be seen from FIG. 12 that before receiving NACK feedback information or not receiving ACK feedback information, a blind retransmission of TB can be sent, thereby improving resource utilization.
  • FIG. 13 Before receiving NACK feedback information or not receiving ACK feedback information, another HARQ feedback-based retransmission of the TB can be sent.
  • an embodiment of the present invention further provides a terminal 140, including:
  • the processing module 141 is configured to perform periodic resource reservation or resource detection according to periodic resource reservation rule information
  • the periodic resource reservation rule information includes at least one of the following:
  • a resource reservation period where the resource reservation period is set according to the TB transmission interval
  • the target number M of resources reserved in a resource reservation period is the target number M of resources reserved in a resource reservation period.
  • the periodic resource reservation rule information includes a resource reservation period, and the resource reservation period is set according to a TB transmission interval.
  • the resource reservation period is the same value in the resource pool as the TB transmission interval.
  • the resource reservation period is a preset code point.
  • the target SCI is one of the following:
  • One or more SCIs associated with the currently transmitted TB are associated with the currently transmitted TB.
  • One or more SCIs associated with the currently transmitted TB include at least the SCI associated with the initial transmission of the currently transmitted TB;
  • the SCI associated with the first n transmissions of the currently transmitted TB, and n is not greater than the value of M_reserved, where M_reserved is the number of resources reserved in one resource reservation period.
  • n is a pre-defined or configured or pre-configured value, or the range of n is a pre-defined or configured or pre-configured value;
  • 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.
  • the resource reservation period indicated by the SCI other than the target SCI in the SCI associated with the currently transmitted TB is a preset code point.
  • the periodic resource reservation rule information includes the target number M of resources reserved in one resource reservation period.
  • the target number M of resources reserved in one resource reservation period is the smallest of the following two:
  • the total number K of resources reserved for the TB scheduled for the target SCI in one resource reservation period is the total number K of resources reserved for the TB scheduled for the target SCI in one resource reservation period.
  • the configuration mode of the M1 is at least one of the following:
  • the transmission mode For each transmission mode, the transmission mode includes unicast, multicast, and broadcast.
  • the periodic resource reservation rule information includes the position of the periodic reserved resource.
  • the location 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 periodic reserved M resources 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 periodically are the first M resources among 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 among the K resources;
  • K is the total number of resources reserved for the terminal in a resource reservation period.
  • the periodically reserved M resources 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 indicator, and carry the resource reservation period indicator
  • the number of target SCIs L1 is less than or equal to M, then the number of resources reserved in one resource reservation period is L1.
  • the periodic reserved M resources are the first target SCI in the current resource reservation period and the M resources in sequence after the time slot, and the first reserved resource indicated by the target SCI If the number L2 is less than or equal to M, the number of resources reserved in one resource reservation period is L2.
  • the periodic resource reservation rule information includes a resource reservation period, and the resource reservation period is indicated by a physical resource or a logical resource.
  • the reserved resource is considered valid, otherwise the reserved resource is considered Invalid;
  • the resource pool configured for the sending terminal of the target SCI includes the resource pool where the target SCI is located and other available resource pools configured for the sending terminal.
  • the periodically reserved resource is the resource in the resource pool configured for the sending terminal that is closest to the resource position reserved by the target SCI;
  • Periodically reserved resources are available resources in the resource pool configured for the sending terminal that are closest to the resource location reserved by the target SCI, and the available resources include at least one of the following: not reserved by other terminals Resources, resources that are not reserved by the resources of the terminal, and resources that are not excluded.
  • the resource where the target SCI is located and the periodically reserved resource satisfy at least one of the following:
  • the resource where the target SCI is located and the periodically reserved resource are in the same resource pool;
  • the resource where the target SCI is located and the periodically reserved resource are not in the same resource pool;
  • At least two resources are located in different resource pools.
  • the frequency domain resources and the time domain resources of the periodically reserved resources satisfy at least one of the following:
  • the granularity of time domain resources is: one time slot, or 1ms, or multiple time slots that are predefined or configured or pre-configured, or the largest or smallest time domain resource among the single resources reserved for the TB currently transmitted number;
  • the frequency domain resource size is: the frequency domain resource size value obtained from the resource indicator value, 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 frequency domain resources is a physical resource block or subchannel
  • the frequency domain resource reference position is the starting position of the frequency domain resource obtained from the resource indicator value indicated by the target SCI, or the lowest physical resource block of the PSCCH or the lowest position of the subchannel, or the highest physical resource block of the PSCCH or The lowest position of the subchannel, or the lowest or highest physical resource block offset of the PSCCH by n_offset resource units, and the lowest or highest subchannel offset of the PSCCH by n_offset resource units, where n_offset is a predefined or preconfigured or configured value.
  • the terminal provided in the embodiment of the present invention can implement each process implemented by the terminal in the method embodiment in FIG.
  • an embodiment of the present invention also provides a terminal 150, including:
  • the first transmission module 151 is configured to always use HARQ feedback-based retransmission during the TB transmission if the SCI associated with the TB transmission indicates that the TB transmission requires feedback or PSFCH enablement;
  • an embodiment of the present invention also provides a terminal 160, including:
  • the second transmission module 161 is configured to switch from retransmission based on HARQ feedback to blind retransmission if the preset condition is met.
  • the preset condition includes at least one of the following:
  • ACK feedback information is not received within L continuous feedback time, where L is a predefined or pre-configured or configured value
  • L1 pieces of NACK feedback information are received or continuously received, where L1 is a pre-defined or pre-configured or configured value;
  • L2 retransmissions are sent or sent continuously, where L2 is a pre-defined or pre-configured or configured value
  • the remaining time of the TB transmission is less than or equal to the time threshold T_thresh, and the T_thresh 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%, and the x% is a pre-defined or pre-configured or configured value.
  • the second transmission module 161 is configured to send the blind retransmission of the TB before receiving the NACK feedback information or before receiving the ACK feedback information.
  • the terminal provided in the embodiment of the present invention can implement each process implemented by the terminal in the method embodiment of FIG. 3, and to avoid repetition, details are not described herein again.
  • the terminal 170 includes but is not limited to: a radio frequency unit 171, a network module 172, an audio output unit 173, an input unit 174, a sensor 175, a display unit 176, User input unit 177, interface unit 178, memory 179, processor 1710, power supply 1711 and other components.
  • a radio frequency unit 171 includes but is not limited to: a radio frequency unit 171, a network module 172, an audio output unit 173, an input unit 174, a sensor 175, a display unit 176, User input unit 177, interface unit 178, memory 179, processor 1710, power supply 1711 and other components.
  • the terminal structure shown in FIG. 17 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components.
  • the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle-mounted terminal, a wearable device, and a ped
  • the processor 1710 is configured to perform periodic resource reservation or resource detection according to periodic resource reservation rule information
  • the periodic resource reservation rule information includes at least one of the following:
  • a resource reservation period where the resource reservation period is set according to the TB transmission interval
  • the target number M of resources reserved in a resource reservation period is the target number M of resources reserved in a resource reservation period.
  • the processor 1710 is configured to, if the SCI associated with the TB transmission indicates that the TB transmission requires feedback or PSFCH enablement, retransmission based on HARQ feedback is always used during the TB transmission; or, if the preset is satisfied Condition, from retransmission based on HARQ feedback to blind retransmission.
  • the radio frequency unit 171 can be used to receive and send signals during information transmission or communication. Specifically, the downlink data from the base station is received and sent to the processor 1710 for processing; in addition, Uplink data is sent to the base station.
  • 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.
  • the radio frequency unit 171 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 172, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 173 may convert the 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 it as sound. Moreover, the audio output unit 173 may also provide audio output related to a specific function performed by the terminal 170 (for example, call signal reception sound, 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 audio or video signals.
  • the input unit 174 may include a graphics processing unit (GPU) 1741 and a microphone 1742.
  • the graphics processor 1741 is configured to monitor images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed.
  • the processed image frame may be displayed on the display unit 176.
  • the image frame processed by the graphics processor 1741 may be stored in the memory 179 (or other storage medium) or sent via the radio frequency unit 171 or the network module 172.
  • the microphone 1742 can receive sound, and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 171 for output 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.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 1761 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 1761 and/or when the terminal 170 is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal gestures (such as horizontal and vertical screen switching, related games, Magnetometer posture calibration), vibration recognition related functions (such as pedometer, percussion), etc.; sensor 175 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared Sensors, etc., will not be repeated here.
  • 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.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 177 may be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the terminal.
  • the user input unit 177 includes a touch panel 1771 and other input devices 1772.
  • the touch panel 1771 also known as a touch screen, can collect the user's touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 1771 or near the touch panel 1771. operate).
  • the touch panel 1771 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 1710, the command sent by the processor 1710 is received and executed.
  • the touch panel 1771 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 177 may also include other input devices 1772.
  • other input devices 1772 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.
  • the touch panel 1771 can be overlaid on the display panel 1761.
  • the touch panel 1771 detects a touch operation on or near it, it transmits it to the processor 1710 to determine the type of touch event, and then the processor 1710 determines the type of the touch event according to the touch.
  • the type of event provides corresponding visual output on the display panel 1761.
  • the touch panel 1771 and the display panel 1761 are used as two independent components to realize the input and output functions of the terminal, but in some embodiments, the touch panel 1771 and the display panel 1761 may be integrated. Realize the input and output functions of the terminal, the specifics are not limited here.
  • the interface unit 178 is an interface for connecting an external device with the terminal 170.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc.
  • the interface unit 178 may be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 170 or may be used to communicate between the terminal 170 and the external device. Transfer data between.
  • the memory 179 can be used to store software programs and various data.
  • the memory 179 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc.
  • the memory 179 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 1710 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal. It executes by running or executing software programs and/or modules stored in the memory 179, and calling data stored in the memory 179. Various functions of the terminal and processing data, so as to monitor the terminal as a whole.
  • the processor 1710 may include one or more processing units; preferably, the processor 1710 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, application programs, etc., the modem The processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 1710.
  • the terminal 170 may also include a power source 1711 (such as a battery) for supplying power to various components.
  • a power source 1711 such as a battery
  • the power source 1711 may be logically connected to the processor 1710 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. Function.
  • terminal 170 includes some functional modules not shown, which will not be repeated here.
  • an embodiment of the present invention also provides a terminal 180, including a processor 181, a memory 182, a computer program stored on the memory 182 and running on the processor 181, and the computer program is
  • the processor 181 implements each process of the foregoing periodic resource selection method embodiment when executed, or, when the computer program is executed by the processor 181, implements each process of the foregoing side link transmission method embodiment, and can achieve the same technical effect, To avoid repetition, I won't repeat it here.
  • the embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, each process of the foregoing periodic resource selection method method embodiment is realized, or the computer When the program is executed by the processor, each process of the foregoing embodiment of the side link transmission method is realized, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
  • the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

Abstract

本发明实施例提供了一种周期资源选择方法、旁链路传输方法及终端，该周期资源选择方法包括：根据周期资源预留规则信息，进行周期资源预留或资源检测；周期资源预留规则信息包括以下至少之一：资源预留周期，资源预留周期根据TB传输间隔设置；一个资源预留周期预留的资源的目标数目M。

Description

周期资源选择方法、旁链路传输方法及终端
相关申请的交叉引用
本申请主张在2020年1月20日在中国提交的中国专利申请号No.202010066634.2的优先权，其全部内容通过引用包含于此。
技术领域
本发明实施例涉及无线通信技术领域，尤其涉及一种周期资源选择方法、旁链路传输方法及终端。
背景技术
长期演进(Long Term Evolution，LTE)系统从第12个发布版本开始支持旁链路(sidelink)，用于终端用户设备(User Equipment，UE，以下简称为终端)之间不通过网络设备进行直接数据传输。
LTE sidelink的设计适用于特定的公共安全事务(如火灾场所或地震等灾难场所进行紧急通讯)，或车联网(vehicle to everything，V2X)通信等。车联网通信包括各种业务，例如，基本安全类通信，高级(自动)驾驶，编队，传感器扩展等等。由于LTE sidelink只支持广播通信，因此主要用于基本安全类通信，其他在时延、可靠性等方面具有严格服务质量(Quality of Service，QoS)需求的高级V2X业务将通过新空口(New Radio，NR)sidelink支持。
现有R16V2X中，定义了周期预留机制，即当前传输的传输块(Transport Block，TB)可以为后续的TB周期预留资源，但是未定义具体的周期资源预留规则，例如：预留旁链路控制信息(Sidelink Control Information，SCI)所在的一个资源，或者，预留SCI指示预留的所有资源，若不定义周期资源预留规则，可能导致不同终端在检测时有不同的理解，使得选择资源时资源排除不准确，从而导致资源碰撞的问题。
发明内容
本发明实施例提供了一种周期资源选择方法、旁链路传输方法及终端，用于解决旁链路系统中终端对周期预留资源的规则没有统一的理解，使得选择资源时资源排除不准确，导致资源碰撞的问题。
为了解决上述技术问题，本发明是这样实现的：
第一方面，本发明实施例提供了一种周期资源选择方法，应用于终端，包括：根据周期资源预留规则信息，进行周期资源预留或资源检测；
所述周期资源预留规则信息包括以下至少之一：
资源预留周期，所述资源预留周期根据TB传输间隔设置；
一个资源预留周期预留的资源的目标数目M。
第二方面，本发明实施例提供了一种旁链路传输方法，应用于终端，包括：
若TB传输相关联的SCI中指示所述TB传输需要反馈或者PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传；
或者
若满足预设条件，由基于HARQ反馈的重传转换为盲重传。
第三方面，本发明实施例提供了一种终端，包括：
处理模块，用于根据周期资源预留规则信息，进行周期资源预留或资源检测；
所述周期资源预留规则信息包括以下至少之一：
资源预留周期，所述资源预留周期根据TB传输间隔设置；
一个资源预留周期预留的资源的目标数目M。
第四方面，本发明实施例提供了一种终端，包括：
第一传输模块，用于若TB传输相关联的SCI中指示所述TB传输需要反馈或者物理旁链路反馈信道PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传；
或者
第二传输模块，用于若满足预设条件，由基于HARQ反馈的重传转换为盲重传。
第五方面，本发明实施例提供了一种终端，包括处理器、存储器及存储 在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述第一方面的周期资源选择方法的步骤。
第六方面，本发明实施例提供了一种终端，包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述第二方面的旁链路传输方法的步骤。
第七方面，本发明实施例提供了一种计算机可读存储介质，所述计算机可读存储介质上存储计算机程序，所述计算机程序被处理器执行时实现上述第一方面的周期资源选择方法的步骤；或者，所述计算机程序被处理器执行时实现上述第二方面的旁链路传输方法的步骤。
在本发明实施例中，终端能够根据周期预留资源规则信息保持对信息理解一致，进行周期资源预留或资源检测，从而使得其他终端在选择资源时能够准确排除已被周期预留的资源，避免资源碰撞的问题，可以提高终端传输数据的可靠性。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本发明实施例提供的一种无线通信系统的架构示意图；
图2为本发明实施例的周期资源选择方法的流程示意图；
图3为本发明一实施例的旁链路传输方法的流程示意图；
图4为本发明另一实施例的旁链路传输方法的流程示意图；
图5为本发明实施例一的周期资源选择方法的示意图；
图6为本发明实施例二的周期资源选择方法的示意图；
图7为本发明实施例三的周期资源选择方法的示意图；
图8为本发明实施例四的周期资源选择方法的示意图；
图9为本发明实施例五的周期资源选择方法的示意图；
图10为本发明实施例六的周期资源选择方法的示意图；
图11为本发明实施例七的旁链路传输方法的示意图；
图12为本发明实施例八的旁链路传输方法的示意图；
图13为本发明实施例九的旁链路传输方法的示意图；
图14为本发明一实施例的终端的结构示意图；
图15为本发明另一实施例的终端的结构示意图；
图16为本发明又一实施例的终端的结构示意图；
图17为本发明又一实施例的终端的结构示意图；
图18为本发明再一实施例的终端的结构示意图。
具体实施方式
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本发明实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本发明实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
下面结合附图介绍本发明的实施例。
参考图1，为本发明实施例提供的一种无线通信系统的架构示意图。如图1所示，该无线通信系统可以包括：网络侧设备11和多个终端12，终端12可以通过上行(uplink)和下行(downlink)链路与网络侧设备11连接，终端12之间可以通过旁链路(sidelink)连接。
本发明实施例主要应用于终端之间通过旁连接连接的场景。
本发明实施例提供的终端12可以为手机、平板电脑、笔记本电脑、超级移动个人计算机(Ultra-Mobile Personal Computer，UMPC)、上网本、个 人数字助理(Personal Digital Assistant，PDA)、车辆、或者路边单元(RSU,road side unit)等。所属领域技术人员可以理解，用词并不构成限制。
请参考图2，图2为本发明实施例的周期资源选择方法的流程示意图，该周期资源选择方法应用于终端，包括：
步骤21：根据周期资源预留规则信息，进行周期资源预留或资源检测；
所述周期资源预留规则信息包括以下至少之一：
资源预留周期，所述资源预留周期根据TB传输间隔设置；
一个资源预留周期预留的资源的目标数目M。
本发明实施例中，终端能够根据周期预留资源规则信息保持对信息理解一致，进行周期资源预留或资源检测，从而使得其他终端在选择资源时能够准确排除已被周期预留的资源，避免资源碰撞的问题，可以提高终端传输数据的可靠性。
针对每个资源池，高层配置这个资源池是否使能周期预留以及配置一些资源预留周期的候选值，终端通过目标SCI指示资源预留周期。
需要说明的是，进行周期资源预留或资源检测是指，发送目标SCI的发送终端，根据周期资源预留规则信息，进行周期资源预留，而接收目标SCI的接收终端则是根据周期资源预留规则信息进行资源检测，另外，资源检测过程中并非只检测周期资源。
对于一个TB，资源预留周期通过目标SCI指示，每个SCI最多可以预留的资源数目为Nmax，其中Nmax的最大值为3。Nmax为每个资源池(resource pool)可以配置的值，可选值为2或3。进一步地，一个TB传输的次数在模式1(mode 1)中是没有限制的，取决于基站调度。一个TB(包括盲重传模式和基于HARQ重传模式)，在模式2(mode 2)中最大传输次数为32次。具体为RRC配置的值。RRC基于每个资源池，每个信道忙率(Channel Busy Ratio，CBR)范围，每个优先级配置最大传输次数。
所述周期资源预留规则信息可以是由预定义、预配置、配置或者由所述目标SCI指示的。
下面对周期资源预留规则信息进行详细说明。
一、周期资源预留规则信息包括资源预留周期
本发明实施例中，资源预留周期可以通过目标SCI的“资源预留周期(Resource reservation period)”指示域指示。所述指示域指示的资源预留周期可以由所述目标SCI的发送终端设置。
可选的，所述资源预留周期根据TB传输间隔设置。即，当高层使能为后续的TB预留周期资源，终端按照高层提供的TB传输间隔设置目标SCI中的资源预留周期。
本发明实施例中，为终端配置的资源池中配置或预配置多个资源预留周期的值，例如，16个资源预留周期的值。
在本发明的一些实施例中，可选的，目标SCI的“资源预留周期”指示域中指示的资源预留周期为资源池中与所述TB传输间隔相同的值。可选的，协议规定高层提供的TB传输间隔是资源池中配置或预配置的值。
在本发明的其他一些实施例中，若资源池中不存在与所述TB传输间隔相同的值，所述资源预留周期为预设码点。预设码点对应的资源预留周期例如可以是0，或者，不进行周期预留。
下面对上述目标SCI进行说明。
本发明实施例中，所述目标SCI为以下之一：
1)当前传输的TB(包括TB的初传和/或重传)相关联的所有SCI；
2)当前传输的TB(包括TB的初传和/或重传)相关联的一个或多个SCI；
可选的，所述一个或多个SCI由SCI的发送终端决定。
3)当前传输的TB相关联的一个或多个SCI，且所述一个或多个SCI中至少包含当前传输的TB的初传相关联的SCI；
可选的，所述一个或多个SCI由SCI的发送终端决定。
4)当前传输的TB的初传相关联的SCI；
5)当前传输的TB(包括TB的初传和/或重传)的前n次传输相关联的SCI；
n的值为预定义或配置或预配置的值，或者，n的范围为预定义或配置或预配置的值；
其中，n的范围可以包括n的上限和/或下限。
6)当前传输的TB(包括TB的初传和/或重传)的前n次传输相关联的 SCI，且n为不大于M_reserved的值，M_reserved为一个资源预留周期预留的资源的数目。
n的值为预定义或配置或预配置的值，或者，n的范围为预定义或配置或预配置的值；
其中，n的范围可以包括n的上限和/或下限。
M_reserved的值为预定义或配置或预配置的值，或者，M_reserved的范围为预定义或配置或预配置的值。
其中，M_reserved的范围可以包括M_reserved的上限和/或下限。
上述内容中提到，TB的传输可以分为TB的初传和重传，下面对初传和重传的资源的选择和预留方式进行说明。
1、关于初传：
目前，支持当前传输的TB的SCI为后续的TB的初传周期预留资源。在R16V2X中，也支持基于非预留的方式给初传分配资源，也就是基于检测和资源选择的过程为初传分配资源。
2、关于重传：
在R16中，支持两种重传模式，一种是盲重传(blind retransmission)，一种是基于HARQ反馈的重传(HARQ based retransmission)。
在盲重传下，支持为重传预留资源，盲重传为预先为TB分配多个重传资源，发送终端(TX UE)在预先分配给该TB的所有重传资源上传输该TB的重传。
在基于HARQ反馈的重传模式下，支持为重传预留资源。基于HARQ反馈的重传为在为TB分配的初传资源上传输该TB的初传，如果接收终端解调成功，则反馈ACK(确定确认)，发送终端则不再对该TB进行重传；如果接收终端解调失败，则反馈NACK(否定确认)，发送终端则在为该TB分配的重传资源上对该TB进行重传。
本发明实施例中，对于盲重传和基于HARQ反馈的重传，上述n值可以不同。即盲重传和基于HARQ反馈的重传的n值是独立定义或独立预配置或独立配置的。
本发明的一些实施例中，当前传输的TB相关联的SCI中除所述目标SCI 之外的其他SCI指示的资源预留周期为预设码点。预设码点对应的资源预留周期例如可以是0，或者，不进行周期预留。
二、周期资源预留规则信息包括一个资源预留周期预留的资源的目标数目M
本发明实施例中，所述一个资源预留周期预留的资源的目标数目M为以下两者中的最小者：
预定义或预配置或配置的一个资源预留周期预留的资源的数目M1；
为终端在一个资源预留周期预留的资源的总数K。
即，若M1大于或等于K，则M＝K，否则，M＝M1。
其中，M1个预留位置可能会在一个资源预留周期内，也可能会超过一个资源预留周期的长度，使得资源预留周期和资源预留周期预留的资源可能会产生重叠。
本发明实施例中，可选的，所述M1的配置方式为以下至少之一：
每个资源池(Per resource pool)；
每个优先级(Per priority)；
每个终端(Per UE)；
每个链路(Per link)；
每种传输方式(Per cast type)，所述传输方式包括单播(unicast)、组播(groupcast)和广播(broadcast)。目前的sidelink传输方式主要分广播，组播，单播。单播顾名思义就是一对一(one to one)的传输。组播为一对多(one to many)的传输组播中可能存在多个组。广播也是一对多(one to many)的传输，广播可以认为所有的UE属于一个组，不存在多个组。
也就是说，可以为每个资源池或每个优先级或每个终端或每个链路或每种传输方式配置其对应的M1。
三、周期资源预留规则信息包括一个资源预留周期预留的资源的目标数目M，和，周期预留的资源的位置。
本发明实施例中，可选的，所述周期预留的资源的位置满足以下条件之一：
1)周期预留的M个资源为当前资源预留周期内的所述目标SCI指示的前 M个资源；
本发明实施例中，可选的，若周期预留的M个资源为当前资源预留周期内的所述目标SCI指示的前M个资源或携带资源预留周期指示的前M个资源，且携带资源预留周期指示目标SCI的数目为L1小于或等于M，则一个资源预留周期预留的资源的数目为L1。
2)周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源(包括SCI所在的时隙的资源)；
本发明实施例中，可选的，若周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源，且第一个所述目标SCI指示的预留资源的数目L2(包括SCI所在的时隙的资源)小于或等于M，则一个资源预留周期预留的资源的数目为L2。
3)周期预留的M个资源为K个资源中的前M个资源；
4)周期预留的M个资源为K个资源中随机选择的M个资源；
5)周期预留的M个资源为K个资源中的后M个资源；
其中，K是为终端在一个资源预留周期预留的资源的总数。
本发明实施例中，发送目标SCI的终端认为每一个资源预留周期预留的资源的数目为M，认为预留的资源的位置如上述定义。接收到目标SCI的终端进行资源检测时，认为其他终端每一个资源预留周期预留的资源的数目为M，认为需要排除的资源的位置如上述定义。
本发明实施例中，若所述周期资源预留规则信息包括资源预留周期，所述资源预留周期可以采用资源池的物理资源或逻辑资源指示。
Sidelink中，资源池的定义为高层一些可用资源的图样，周期应用这些图样，作为sidelink的可用资源，sidelink的可用资源在时域上对应的物理资源可以是不连续的。
可选的，在一些实施例中，若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源在所述目标SCI所在的资源池内，则认为预留的资源有效，否则认为预留的资源无效；或者
若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源位于为所述目标SCI的发送终端配置的资源池内，则认为预留的资源有效， 否则认为预留的资源无效，所述为所述目标SCI的发送终端配置的资源池包括所述目标SCI所在的资源池内以及为所述发送终端配置的其他可用资源池。
其中，为所述发送终端配置的资源池可以包括：目标SCI所在的资源池，和/或，为所述发送终端配置的可用的其他资源池。
举例来说，当目标SCI位于资源池1中，对于预留资源(可能有部分在资源池1，部分位于资源池2)位于该终端的资源池2(不同于资源池1的一个资源池)中，则该终端认为位于资源池2中资源为终端在资源池2中的资源预留。其他终端在检测的时候，认为该终端在资源池2中预留了这部分资源。
下面对周期预留的资源与目标SCI指示的预留资源的位置关系进行说明。
可选的，在一些实施例中，周期预留的资源为距离所述目标SCI预留的资源位置后最近的一个为所述发送终端配置的资源池内的资源。其中，为所述发送终端配置的资源池可以包括：目标SCI所在的资源池，和/或，为所述发送终端配置的可用的其他资源池。
可选的，在一些实施例中，周期预留的资源为距离所述目标SCI预留的资源位置后最近的一个为所述发送终端配置的资源池内的可用资源，所述可用资源包括以下至少之一：未被其他终端预留的资源，未被所述终端的资源预留的资源(例如其他进程周期或非周期预留的资源)，以及，未被排除的资源。其中，为所述发送终端配置的资源池可以包括：目标SCI所在的资源池，和/或，为所述发送终端配置的可用的其他资源池。
可选的，所述目标SCI所在的资源和周期预留的资源满足以下至少一项：
1)所述目标SCI所在的资源和周期预留的资源在相同的资源池内；
也就是说，若预留的资源位于另一个资源池内，则认为预留的资源无效。
2)所述目标SCI所在的资源和周期预留的资源不在相同的资源池内；
3)周期预留的多个资源中，至少两个资源位于不同的资源池内。
本发明实施例中，可选的，周期预留的资源的频域资源和时域资源满足以下至少一项：
时域资源的粒度为：一个时隙，或者，1ms，或者，预定义或配置或预配置的多个时隙，或者，为当前传输的TB预留的单个资源中最大或最小的时域 资源数目；
频域资源大小为：资源指示值(Resource indicator value，RIV)中得到的频域资源大小值，或者，资源池的整个频域资源，或者，为当前传输的TB预留的资源的最大或最小频域资源数目；
频域资源的单位为物理资源块(Physical Resource Block，PRB)或子信道(subchannel)；
频域资源参考位置为所述目标SCI指示的资源指示值中得到的频域资源的起始位置，或者，PSCCH的最低物理资源块或子信道的最低位置，或者，PSCCH的最高物理资源块或子信道的最低位置，或者，PSCCH的最低或最高物理资源块偏移n_offset个资源单位，PSCCH的最低或最高子信道偏移n_offset个资源单位，n_offset为预定义或预配置或配置的值。
目前，支持终端同时支持盲重传和基于HARQ反馈的重选，但是并未规定如何同时支持盲重传和基于HARQ反馈的重选。
为解决上述问题，请参考图3，本发明还提供一种旁链路传输方法，应用于终端，包括：
步骤31：若TB传输相关联的SCI中指示所述TB传输需要反馈或者物理旁链路反馈信道(PSFCH)使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传。
本发明实施例中，定义了当终端能够同时支持盲重传和基于HARQ反馈的重选时，若指示TB传输需要反馈或者PSFCH使能，则一直采用基于HARQ反馈的重传，即转换为基于HARQ反馈的重传之后，不再支持盲重传。
在本发明的一些实施例中，可选的，还包括：在收到NACK反馈信息或者是未收到ACK反馈信息之前，可以发送所述TB的另一个基于HARQ反馈的重传。
为解决上述问题，请参考图4，本发明还提供一种旁链路传输方法，应用于终端，包括：
步骤41：若满足预设条件，由基于HARQ反馈的重传转换为盲重传。
本发明实施例中，定义了当终端能够同时支持盲重传和基于HARQ反馈的重选时，可以由基于HARQ反馈的重选转换为盲重传。
可选的，若满足预设条件，由基于HARQ反馈的重传转换为盲重传包括：
若满足预设条件，调度TB的SCI指示PSFCH不使能。
可选的，所述预设条件包括以下至少之一：
在连续的L个反馈时间内未接收到ACK反馈信息(包括DTX)，所述L为预定义或预配置或配置的值；
接收到或连续接收到L1个NACK反馈信息，所述L1为预定义或预配置或配置的值；
发送或连续发送了L2次重传，所述L2为预定义或预配置或配置的值；
所述TB传输的剩余时间(remaining PDB时间)小于或等于时间门限值T_thresh，所述T_thresh为预定义或预配置或配置的值。
所述TB传输的剩余时间/TB传输总时间小于或等于x％，所述x％为预定义或预配置或配置的值。
在本发明的一些实施例中，可选的，所述由基于HARQ反馈的重传转换为盲重传包括：在收到NACK反馈信息或者是未收到ACK反馈信息之前，不发送所述TB的重传(包括盲重传和基于HARQ反馈的重传)。
在本发明的一些实施例中，可选的，所述由基于HARQ反馈的重传转换为盲重传包括：在收到NACK反馈信息或者是未收到ACK反馈信息之前，发送所述TB的盲重传，但是不发送基于HARQ反馈的重传，从而提高资源利用率。
在本发明的一些实施例中，可选的，还包括：在收到NACK反馈信息或者是未收到ACK反馈信息之前，可以发送所述TB的另一个基于HARQ反馈的重传。
下面结合具体实施例对上述的方法进行举例说明。
本发明实施例一：
在资源池(resource pool)中预配置每个资源预留周期内预留的资源数目为5，请参考图5，终端预留当前资源预留周期中目标SCI指示的前5个预留资源。
其中，目标SCI为携带周期指示的SCI。本发明实施例中，一个SCI指示三个资源。
本发明实施方式二：
在资源池中预配置每个资源预留周期内预留的资源数目为5，请参考图6，终端预留上一个源预留周期中第一个目标SCI及其后的前5个预留资源。
其中，目标SCI为携带周期指示的SCI。本发明实施例中，一个SCI指示三个资源。
本发明实施方式三：
请参考图7，预定义周期预留的资源数目等于当前资源预留周期内预留的所有传输资源的数目。
本发明实施方式四：
请参考图8，假设配置子载波间隔为15kHz，高层配置sidelink资源池，包括物理时隙0-3,8-14,17-19,22-25,30,31,33,34,36-39。在sidelink上重新编号为逻辑时隙资源0-25。
在时隙1，SCI携带预留资源周期指示，根据指示信息和高层配置信息获取预留资源周期为P(6ms)，预留资源周期P应用于sidelink的逻辑时隙资源。
本发明实施方式五：
请参考图9，假设配置子载波间隔为15kHz，高层配置sidelink资源池，包括物理时隙0-3,8-14,17-19,22-25,30，31,33,34,36-39。在sidelink上重新编号为逻辑时隙资源0-25。
在时隙1，SCI携带预留资源周期指示，根据指示信息和高层配置信息获取预留资源周期为P(6ms)，预留资源周期P应用于物理时隙资源。
若预留的资源不在sidelink资源池内，则认为该预留的资源无效。也就是预留资源为1,11,31,36(物理资源编号)。6,16,21,26(物理资源编号)为无效资源，认为不预留。
本发明实施方式六：
请参考图10，假设配置子载波间隔为15kHz，高层配置sidelink资源池，包括物理时隙0-3,8-14,17-19,22-25,30，31,33,34,36-39。在sidelink上重新编号为逻辑时隙资源0-25。
在时隙1，SCI携带预留资源周期指示，根据指示信息和高层配置信息获取预留资源周期为P(6ms)，预留资源周期P应用于物理时隙资源。
在进行资源预留时，若物理时隙预留资源不在sidelink资源池内(例如编号为6的物理资源)，则预留的资源为该资源池内下一个可用资源(即编号为8的物理资源)。也就是预留资源为1,8,11,17,22,30,31,38(物理时隙资源编号)，也就是1,4,7,11,14,18,19,22(逻辑资源编号)。
本发明实施方式七：
若TB传输相关联的SCI中指示所述TB传输需要反馈或者PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传。即转换为基于HARQ反馈的重传之后，不再支持盲重传。
本发明实施方式八：
请参考图11，从图11的(a)和(b)中可以看出，在收到NACK反馈信息或者是未收到ACK反馈信息之前，不发送所述TB的重传(包括盲重传和基于HARQ反馈的重传)。
之后可以指示基于HARQ反馈的重传禁用，从而转化为盲重传。
本发明实施方式九：
请参考图12，从图12中可以看出，在收到NACK反馈信息或者是未收到ACK反馈信息之前，可以发送TB的盲重传，从而提高资源利用率。
本发明实施方式十：
请参考图13，从图13中可以看出，在收到NACK反馈信息或者是未收到ACK反馈信息之前，可以发送该TB的另一个基于HARQ反馈的重传。
请参考图14，本发明实施例还提供一种终端140，包括：
处理模块141，用于根据周期资源预留规则信息，进行周期资源预留或资源检测；
所述周期资源预留规则信息包括以下至少之一：
资源预留周期，所述资源预留周期根据TB传输间隔设置；
一个资源预留周期预留的资源的目标数目M。
可选的，所述周期资源预留规则信息包括资源预留周期，所述资源预留周期根据TB传输间隔设置。
可选的，所述资源预留周期为资源池中与所述TB传输间隔相同的值。
可选的，若资源池中不存在与所述TB传输间隔相同的值，所述资源预留 周期为预设码点。
可选的，所述目标SCI为以下之一：
当前传输的TB相关联的所有SCI；
当前传输的TB相关联的一个或多个SCI；
当前传输的TB相关联的一个或多个SCI，且所述一个或多个SCI中至少包含当前传输的TB的初传相关联的SCI；
当前传输的TB的初传相关联的SCI；
当前传输的TB的前n次传输相关联的SCI；
当前传输的TB的前n次传输相关联的SCI，且n为不大于M_reserved的值，M_reserved为一个资源预留周期预留的资源的数目。
可选的，n的值为预定义或配置或预配置的值，或者，n的范围为预定义或配置或预配置的值；
可选的，M_reserved的值为预定义或配置或预配置的值，或者，M_reserved的范围为预定义或配置或预配置的值。
可选的，当前传输的TB相关联的SCI中除所述目标SCI之外的其他SCI指示的资源预留周期为预设码点。
可选的，所述周期资源预留规则信息包括一个资源预留周期预留的资源的目标数目M。
可选的，所述一个资源预留周期预留的资源的目标数目M为以下两者中的最小者：
预定义或预配置或配置的一个资源预留周期预留的资源的数目M1；
为所述目标SCI调度的TB在一个资源预留周期预留的资源的总数K。
可选的，所述M1的配置方式为以下至少之一：
每个资源池；
每个优先级；
每个终端；
每个链路；
每种传输方式，所述传输方式包括单播、组播和广播。
可选的，所述周期资源预留规则信息包括周期预留的资源的位置。
可选的，所述周期预留的资源的位置满足以下条件之一：
周期预留的M个资源为当前资源预留周期内的所述目标SCI指示的前M个资源；
周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源；
周期预留的M个资源为K个资源中的前M个资源；
周期预留的M个资源为K个资源中随机选择的M个资源；
周期预留的M个资源为K个资源中的后M个资源；
其中，K是为终端在一个资源预留周期预留的资源的总数。
可选的，若周期预留的M个资源为当前资源预留周期内的所述目标SCI指示的前M个资源或携带资源预留周期指示的前M个资源，且携带资源预留周期指示的目标SCI的数目L1小于或等于M，则一个资源预留周期预留的资源的数目为L1。
可选的，若周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源，且第一个所述目标SCI指示的预留资源的数目L2小于或等于M，则一个资源预留周期预留的资源的数目为L2。
可选的，所述周期资源预留规则信息包括资源预留周期，所述资源预留周期采用物理资源或逻辑资源指示。
可选的，若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源在所述目标SCI所在的资源池内，则认为预留的资源有效，否则认为预留的资源无效；或者
若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源位于为所述目标SCI的发送终端配置的资源池内，则认为预留的资源有效，否则认为预留的资源无效，所述为所述目标SCI的发送终端配置的资源池包括所述目标SCI所在的资源池内以及为所述发送终端配置的其他可用资源池。
可选的，周期预留的资源为距离所述目标SCI预留的资源位置后最近的一个为所述发送终端配置的资源池内的资源；或者
周期预留的资源为距离所述目标SCI预留的资源位置后最近的一个为所述发送终端配置的资源池内的可用资源，所述可用资源包括以下至少之一： 未被其他终端预留的资源，未被所述终端的资源预留的资源，以及，未被排除的资源。
可选的，所述目标SCI所在的资源和周期预留的资源满足以下至少一项：
所述目标SCI所在的资源和周期预留的资源在相同的资源池内；
所述目标SCI所在的资源和周期预留的资源不在相同的资源池内；
周期预留的多个资源中，至少两个资源位于不同的资源池内。
可选的，周期预留的资源的频域资源和时域资源满足以下至少一项：
时域资源的粒度为：一个时隙，或者，1ms，或者，预定义或配置或预配置的多个时隙，或者，为当前传输的TB预留的单个资源中最大或最小的时域资源数目；
频域资源大小为：资源指示值中得到的频域资源大小值，或者，资源池的整个频域资源，或者，为当前传输的TB预留的资源的最大或最小频域资源数目；
频域资源的单位为物理资源块或子信道；
频域资源参考位置为所述目标SCI指示的资源指示值中得到的频域资源的起始位置，或者，PSCCH的最低物理资源块或子信道的最低位置，或者，PSCCH的最高物理资源块或子信道的最低位置，或者，PSCCH的最低或最高物理资源块偏移n_offset个资源单位，PSCCH的最低或最高子信道偏移n_offset个资源单位，n_offset为预定义或预配置或配置的值。
本发明实施例提供的终端能够实现图2方法实施例中终端实现的各个过程，为避免重复，这里不再赘述。
请参考图15，本发明实施例还提供一种终端150，包括：
第一传输模块151，用于若TB传输相关联的SCI中指示所述TB传输需要反馈或者PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传；
请参考图16，本发明实施例还提供一种终端160，包括：
第二传输模块161，用于若满足预设条件，由基于HARQ反馈的重传转换为盲重传。可选的，所述预设条件包括以下至少之一：
在连续的L个反馈时间内未接收到ACK反馈信息，所述L为预定义或预 配置或配置的值；
接收到或连续接收到L1个NACK反馈信息，所述L1为预定义或预配置或配置的值；
发送或连续发送了L2次重传，所述L2为预定义或预配置或配置的值；
所述TB传输的剩余时间小于或等于时间门限值T_thresh，所述T_thresh为预定义或预配置或配置的值，
所述TB传输的剩余时间/TB传输总时间小于或等于x％，所述x％为预定义或预配置或配置的值。
可选的，所述第二传输模块161，用于在收到NACK反馈信息或者是未收到ACK反馈信息之前，发送所述TB的盲重传。
本发明实施例提供的终端能够实现图3的方法实施例中终端实现的各个过程，为避免重复，这里不再赘述。
图17为实现本发明各个实施例的一种终端的硬件结构示意图，该终端170包括但不限于：射频单元171、网络模块172、音频输出单元173、输入单元174、传感器175、显示单元176、用户输入单元177、接口单元178、存储器179、处理器1710、以及电源1711等部件。本领域技术人员可以理解，图17中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本发明实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、可穿戴设备、以及计步器等。
其中，处理器1710，用于根据周期资源预留规则信息，进行周期资源预留或资源检测；
所述周期资源预留规则信息包括以下至少之一：
资源预留周期，所述资源预留周期根据TB传输间隔设置；
一个资源预留周期预留的资源的目标数目M。
或者，
处理器1710，用于若TB传输相关联的SCI中指示所述TB传输需要反馈或者PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传；或者，若满足预设条件，由基于HARQ反馈的重传转换为盲重传。
应理解的是，本发明实施例中，射频单元171可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器1710处理；另外，将上行的数据发送给基站。通常，射频单元171包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元171还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块172为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元173可以将射频单元171或网络模块172接收的或者在存储器179中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元173还可以提供与终端170执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元173包括扬声器、蜂鸣器以及受话器等。
输入单元174用于接收音频或视频信号。输入单元174可以包括图形处理器(Graphics Processing Unit，GPU)1741和麦克风1742，图形处理器1741对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元176上。经图形处理器1741处理后的图像帧可以存储在存储器179(或其它存储介质)中或者经由射频单元171或网络模块172进行发送。麦克风1742可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元171发送到移动通信基站的格式输出。
终端170还包括至少一种传感器175，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板1761的亮度，接近传感器可在终端170移动到耳边时，关闭显示面板1761和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器175还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀 螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元176用于显示由用户输入的信息或提供给用户的信息。显示单元176可包括显示面板1761，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板1761。
用户输入单元177可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元177包括触控面板1771以及其他输入设备1772。触控面板1771，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1771上或在触控面板1771附近的操作)。触控面板1771可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器1710，接收处理器1710发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1771。除了触控面板1771，用户输入单元177还可以包括其他输入设备1772。具体地，其他输入设备1772可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板1771可覆盖在显示面板1761上，当触控面板1771检测到在其上或附近的触摸操作后，传送给处理器1710以确定触摸事件的类型，随后处理器1710根据触摸事件的类型在显示面板1761上提供相应的视觉输出。虽然在图17中，触控面板1771与显示面板1761是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板1771与显示面板1761集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元178为外部装置与终端170连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元178可以用于接收 来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端170内的一个或多个元件或者可以用于在终端170和外部装置之间传输数据。
存储器179可用于存储软件程序以及各种数据。存储器179可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器179可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器1710是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器179内的软件程序和/或模块，以及调用存储在存储器179内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器1710可包括一个或多个处理单元；优选的，处理器1710可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1710中。
终端170还可以包括给各个部件供电的电源1711(比如电池)，优选的，电源1711可以通过电源管理系统与处理器1710逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端170包括一些未示出的功能模块，在此不再赘述。
优选的，请参考图18，本发明实施例还提供一种终端180，包括处理器181、存储器182，存储在存储器182上并可在所述处理器181上运行的计算机程序，该计算机程序被处理器181执行时实现上述周期资源选择方法实施例的各个过程，或者，该计算机程序被处理器181执行时实现上述旁链路传输方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本发明实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述周期资源选择方法方法实施例的各个过程，或者，该计算机程序被处理器执行时实现上述旁 链路传输方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本发明各个实施例所述的方法。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本发明的保护之内。

Claims (35)

  1. 一种周期资源选择方法，应用于终端，包括：
    根据周期资源预留规则信息，进行周期资源预留或资源检测；
    所述周期资源预留规则信息包括以下至少之一：
    资源预留周期，所述资源预留周期根据传输块TB传输间隔设置；
    一个资源预留周期预留的资源的目标数目M。
  2. 如权利要求1所述的方法，其中，所述资源预留周期为资源池中与所述TB传输间隔相同的值。
  3. 如权利要求1所述的方法，其中，若资源池中不存在与所述TB传输间隔相同的值，所述资源预留周期为预设码点。
  4. 如权利要求1所述的方法，其中，所述资源预留周期通过目标旁链路控制信息SCI指示。
  5. 如权利要求4所述的方法，其中，所述目标SCI为以下之一：
    当前传输的TB相关联的所有SCI；
    当前传输的TB相关联的一个或多个SCI；
    当前传输的TB相关联的一个或多个SCI，且所述一个或多个SCI中至少包含当前传输的TB的初传相关联的SCI；
    当前传输的TB的初传相关联的SCI；
    当前传输的TB的前n次传输相关联的SCI；
    当前传输的TB的前n次传输相关联的SCI，且n为不大于M_reserved的值，M_reserved为一个资源预留周期预留的资源的数目。
  6. 如权利要求5所述的方法，其中，
    n的值为预定义或配置或预配置的值，或者，n的范围为预定义或配置或预配置的值；和/或
    M_reserved的值为预定义或配置或预配置的值，或者，M_reserved的范围为预定义或配置或预配置的值。
  7. 如权利要求5所述的方法，其中，当前传输的TB相关联的SCI中除所述目标SCI之外的其他SCI指示的资源预留周期为预设码点。
  8. 如权利要求1所述的方法，其中，所述一个资源预留周期预留的资源的目标数目M为以下两者中的最小者：
    预定义或预配置或配置的一个资源预留周期预留的资源的数目M1；
    为终端在一个资源预留周期预留的资源的总数K。
  9. 如权利要求8所述的方法，其中，所述M1的配置方式为以下至少之一：
    每个资源池；
    每个优先级；
    每个终端；
    每个链路；
    每种传输方式，所述传输方式包括单播、组播和广播。
  10. 如权利要求1所述的方法，其中，所述周期资源预留规则信息包括周期预留的资源的位置。
  11. 如权利要求10所述的方法，其中，所述周期预留的资源的位置满足以下条件之一：
    周期预留的M个资源为当前资源预留周期内的目标SCI指示的前M个资源；
    周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源；
    周期预留的M个资源为K个资源中的前M个资源；
    周期预留的M个资源为K个资源中随机选择的M个资源；
    周期预留的M个资源为K个资源中的后M个资源；
    其中，K是终端在一个资源预留周期预留的资源的总数，所述目标SCI为携带资源预留周期的SCI。
  12. 如权利要求11所述的方法，其中，
    若周期预留的M个资源为当前资源预留周期内的所述目标SCI指示的前M个资源或携带资源预留周期指示的前M个资源，且携带资源预留周期指示的目标SCI的数目L1小于或等于M，则一个资源预留周期预留的资源的数目为L1。
  13. 如权利要求11所述的方法，其中，
    若周期预留的M个资源为当前资源预留周期内的第一个目标SCI及其时隙后顺序的M个资源，且第一个所述目标SCI指示的预留资源的数目L2小于或等于M，则一个资源预留周期预留的资源的数目为L2。
  14. 如权利要求1或4所述的方法，其中，所述周期资源预留规则信息包括资源预留周期，所述资源预留周期采用物理资源或逻辑资源指示。
  15. 如权利要求14所述的方法，其中，
    若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源在所述目标SCI所在的资源池内，则认为预留的资源有效，否则认为预留的资源无效；或者
    若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源位于为所述目标SCI的发送终端配置的资源池内，则认为预留的资源有效，否则认为预留的资源无效，所述为所述目标SCI的发送终端配置的资源池包括所述目标SCI所在的资源池内以及为所述发送终端配置的其他可用资源池。
  16. 如权利要求4所述的方法，其中，
    周期预留的资源为距离目标SCI预留的资源的位置后最近的一个为所述目标SCI的发送终端配置的资源池内的资源；或者
    周期预留的资源为距离所述目标SCI预留的资源的位置后最近的一个为所述发送终端配置的资源池内的可用资源，所述可用资源包括以下至少之一：未被其他终端预留的资源，未被所述终端的资源预留的资源，以及，未被排除的资源。
  17. 如权利要求4所述的方法，其中，所述目标SCI所在的资源和周期预留的资源满足以下至少一项：
    所述目标SCI所在的资源和周期预留的资源在相同的资源池内；
    所述目标SCI所在的资源和周期预留的资源不在相同的资源池内；
    周期预留的多个资源中，至少两个资源位于不同的资源池内。
  18. 如权利要求4所述的方法，其中，周期预留的资源的频域资源和时域资源满足以下至少一项：
    时域资源的粒度为：一个时隙，或者，1ms，或者，预定义或配置或预配 置的多个时隙，或者，为当前传输的TB预留的单个资源中最大或最小的时域资源数目；
    频域资源大小为：资源指示值中得到的频域资源大小值，或者，资源池的整个频域资源，或者，为当前传输的TB预留的资源的最大或最小频域资源数目；
    频域资源的单位为物理资源块或子信道；
    频域资源参考位置为所述目标SCI指示的资源指示值中得到的频域资源的起始位置，或者，物理旁链路控制信道PSCCH的最低物理资源块或子信道的最低位置，或者，PSCCH的最高物理资源块或子信道的最低位置，或者，PSCCH的最低或最高物理资源块偏移n_offset个资源单位，PSCCH的最低或最高子信道偏移n_offset个资源单位，n_offset为预定义或预配置或配置的值。
  19. 一种旁链路传输方法，应用于终端，包括：
    若TB传输相关联的SCI中指示所述TB传输需要反馈或者PSFCH使能，则在所述TB传输的过程中一直采用基于混合自动重传请求HARQ反馈的重传；
    或者
    若满足预设条件，由基于HARQ反馈的重传转换为盲重传。
  20. 如权利要求19所述的方法，其中，所述预设条件包括以下至少之一：
    在连续的L个反馈时间内未接收到肯定确认ACK反馈信息，所述L为预定义或预配置或配置的值；
    接收到或连续接收到L1个否定确认NACK反馈信息，所述L1为预定义或预配置或配置的值；
    发送或连续发送了L2次重传，所述L2为预定义或预配置或配置的值；
    TB传输的剩余时间小于或等于时间门限值T_thresh，所述T_thresh为预定义或预配置或配置的值，
    TB传输的剩余时间/TB传输总时间小于或等于x％，所述x％为预定义或预配置或配置的值。
  21. 如权利要求19所述的方法，其中，所述由基于HARQ反馈的重传转换为盲重传包括：
    在收到NACK反馈信息或者是未收到ACK反馈信息之前，发送所述TB的盲重传。
  22. 一种终端，包括：
    处理模块，用于根据周期资源预留规则信息，进行周期资源预留或资源检测；
    所述周期资源预留规则信息包括以下至少之一：
    资源预留周期，所述资源预留周期根据TB传输间隔设置；
    一个资源预留周期预留的资源的目标数目M。
  23. 如权利要求22所述的终端，其中，所述资源预留周期为资源池中与所述TB传输间隔相同的值。
  24. 如权利要求22所述的终端，其中，若资源池中不存在与所述TB传输间隔相同的值，所述资源预留周期为预设码点。
  25. 如权利要求22所述的终端，其中，所述资源预留周期通过目标旁链路控制信息SCI指示。
  26. 如权利要求22或25所述的终端，其中，所述周期资源预留规则信息包括资源预留周期，所述资源预留周期采用物理资源或逻辑资源指示。
  27. 如权利要求26所述的终端，其中，若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源在所述目标SCI所在的资源池内，则认为预留的资源有效，否则认为预留的资源无效；或者
    若所述资源预留周期采用物理资源指示，且所述目标SCI指示的预留资源位于为所述目标SCI的发送终端配置的资源池内，则认为预留的资源有效，否则认为预留的资源无效，所述为所述目标SCI的发送终端配置的资源池包括所述目标SCI所在的资源池内以及为所述发送终端配置的其他可用资源池。
  28. 一种终端，包括：
    第一传输模块，用于若TB传输相关联的SCI中指示所述TB传输需要反馈或者物理旁链路反馈信道PSFCH使能，则在所述TB传输的过程中一直采用基于HARQ反馈的重传；
    或者
    第二传输模块，用于若满足预设条件，由基于HARQ反馈的重传转换为 盲重传。
  29. 如权利要求28所述的终端，其中，所述预设条件包括以下至少之一：
    在连续的L个反馈时间内未接收到肯定确认ACK反馈信息，所述L为预定义或预配置或配置的值；
    接收到或连续接收到L1个否定确认NACK反馈信息，所述L1为预定义或预配置或配置的值；
    发送或连续发送了L2次重传，所述L2为预定义或预配置或配置的值；
    TB传输的剩余时间小于或等于时间门限值T_thresh，所述T_thresh为预定义或预配置或配置的值，
    TB传输的剩余时间/TB传输总时间小于或等于x％，所述x％为预定义或预配置或配置的值。
  30. 如权利要求28所述的终端，其中，第二传输模块，用于在收到NACK反馈信息或者是未收到ACK反馈信息之前，发送所述TB的盲重传。
  31. 一种终端，包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至18中任一项所述的周期资源选择方法的步骤。
  32. 一种终端，包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求19至21中任一项所述的旁链路传输方法的步骤。
  33. 一种计算机可读存储介质，其上存储计算机程序，所述计算机程序被处理器执行时实现如权利要求1至18中任一项所述的周期资源选择方法的步骤；或者，所述计算机程序被处理器执行时实现如权利要求19至21中任一项所述的旁链路传输方法的步骤。
  34. 一种计算机程序产品，其中，所述程序产品被至少一个处理器执行以实现如权利要求1至18中任一项所述的周期资源选择方法的步骤；或者，所述计算机程序被处理器执行时实现如权利要求19至21中任一项所述的旁链路传输方法的步骤。
  35. 一种终端，其中，所述终端被配置为用于执行如权利要求1至18中任一项所述的周期资源选择方法的步骤；或者，所述终端被配置为用于执行 如权利要求19至21中任一项所述的旁链路传输方法的步骤。
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