CN111885619B - Channel monitoring method and terminal equipment - Google Patents

Channel monitoring method and terminal equipment Download PDF

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Publication number
CN111885619B
CN111885619B CN202010591843.9A CN202010591843A CN111885619B CN 111885619 B CN111885619 B CN 111885619B CN 202010591843 A CN202010591843 A CN 202010591843A CN 111885619 B CN111885619 B CN 111885619B
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channel
interception
resource
configuration information
reserved
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CN111885619A (en
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沈霞
杜滢
闫志宇
焦慧颖
刘晓峰
魏贵明
徐菲
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a channel interception method and terminal equipment, which solve the problems of high transmission collision probability and high channel interception power consumption when the existing method and equipment are used for carrying out re-evaluation on reserved transmission resources. In order to solve the above problems, the present invention provides a channel sensing method, wherein the configuration information includes channel sensing indication information for re-evaluating the periodically reserved transmission resources, and the channel sensing indication information is used for indicating the sensing period and/or the sensing channel resource position. A channel interception terminal device, a configuration module, for obtaining configuration information; a transmitting module for transmitting an SCI, wherein the SCI indicates a periodically reserved transmission resource for the PSSCH; and the receiving evaluation module is used for receiving the monitoring detection SCI and re-evaluating the periodically reserved resources according to the configuration information. The invention realizes the partial channel interception with low channel interception power consumption.

Description

Channel interception method and terminal equipment
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a channel sensing method and a terminal device.
Background
In the terminal-to-terminal communication technology, a terminal may select a transmission resource by a channel sensing method. To support periodic traffic transmission, the terminal may indicate periodic resource occupancy. Since the transmission resources selected based on the channel monitoring method belong to distributed channel access, different terminals may have different channel monitoring results, and may select the same transmission resources to collide, and the terminal has sent SCI (sidelink control information) indicating that the reserved transmission resources may also be occupied by other terminals, the terminal needs to continue monitoring the channel to perform re-evaluation (re-evaluation) of the reserved transmission resources. Currently, a terminal may re-evaluate a transmission resource reserved by an issued SCI indication through a continuous listening channel, but continuous listening may cause large power consumption of the terminal.
Disclosure of Invention
The invention provides a channel interception method and terminal equipment, which solve the problems of high transmission collision probability and high channel interception power consumption when the existing method and equipment are used for reevaluating reserved transmission resources.
In order to solve the problems, the invention is realized by the following steps:
in a first aspect, a channel sensing method is characterized in that configuration information includes channel sensing indication information for re-evaluating periodically reserved transmission resources, where the channel sensing indication information is used to indicate sensing periods and/or sensing channel resource positions.
Further, the method for determining the listening period comprises the following steps: the interception period Ps is a subset with a value not higher than P in { P _1, P _2, P _3, \8230andP _ M }, wherein P is a reservation period of indicated periodic reserved transmission resources, P _1, P _2, P _3, \8230, P _ M is M reservation periods on a resource pool corresponding to the periodic reserved transmission resources, and P is one of { P _1, P _2, P _3, \8230andP _ M }.
Further, the method for determining the time domain position of the listening channel resource position comprises: if the periodically reserved transmission resources are indicated to occupy Y time domain positions Ty in a reserved period, the corresponding time domain positions of the interception channel resource positions are [ Ty-Ps-Ts1, ty-Ps + Ts2]; y =1,2, \ 8230, Y, ps is the listening period, ts1, ts2 are respectively the first and second durations, the values of Ts1, ts2 are 0, or are carried by the configuration information, or depend on the terminal implementation, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
Further, the method for determining the time domain position of the listening channel resource position comprises: if the periodically reserved transmission resources are indicated to occupy Y time domain positions Ty in a reserved period, the occupied time domain starting position is Ty _ start, and the occupied time domain ending position is Ty _ end, the corresponding time domain positions of the interception channel resource positions are [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2]; y =1,2, \8230, Y, ty _ start is the minimum value of Ty (Y =1,2 \8230, Y), ty _ end is the maximum value of Ty (Y =1,2 \8230, Y), ps is the listening period, ts1 and Ts2 are respectively the first and second durations, the values of Ts1 and Ts2 are 0, or are carried by the configuration information, or depend on the terminal implementation, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
Preferably, the frequency domain position in the sensing channel resource position is all sub-channels used for PSSCH transmission on a resource pool corresponding to the PSSCH transmission.
Preferably, the frequency domain position in the resource position of the listening channel is a sub-channel in a region [ Fy _ start-Fs1, fy _ end + Fs2] on a resource pool corresponding to psch transmission, where Fy _ start and Fy _ end are respectively a starting position and an ending position of a frequency domain sub-channel that the periodically reserved transmission resource is indicated to occupy in a reservation period, fs1 and Fs2 are respectively a first frequency domain length and a second frequency domain length, and the value is 0, or are carried by the configuration information, or are implemented by the terminal, or the configuration information indicates a threshold, and Fs1 and Fs2 values selected by the terminal are not lower than corresponding thresholds.
Preferably, the channel sensing indication information is further configured to indicate that channel sensing is performed in a time window [ T _ start0-W1, T _ start0- Δ T ], where T _ start0 is a time domain starting position of a reserved transmission resource in a reservation period or a pre-selected transmission resource that is not indicated after re-evaluation, W1 is a window length, and Δ T is a processing delay.
Preferably, the resource pool corresponding to the configuration information includes an enable or disable flag, where the enable or disable flag is used to enable or disable a partial channel sensing mechanism for periodically re-evaluating reserved transmission resources.
Preferably, the information indicated in the configuration information is written in a default manner specified by a network device for sending and acquiring, other terminal devices for sending and acquiring, or a standard protocol.
Further, the channel sensing method is characterized by comprising the following steps: acquiring the configuration information; and when the SCI indicates the periodically reserved transmission resources, re-evaluating the periodically reserved resources according to the channel sensing indication information contained in the configuration information.
In a second aspect, an embodiment of the present invention further provides a channel sensing terminal device, where the method includes: the configuration module is used for acquiring configuration information; a transmitting module for transmitting an SCI, wherein the SCI indicates a periodically reserved transmission resource for the PSSCH; and the receiving evaluation module is used for receiving the monitoring detection SCI and re-evaluating the periodically reserved resources according to the configuration information.
The beneficial effects of the invention include: the invention provides a channel interception method and terminal equipment, which adopt a partial interception technology to re-evaluate periodic reserved resources, support the terminal to re-evaluate the periodic reserved resources, and can greatly reduce the transmission collision probability and the terminal channel interception power consumption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:
fig. 1 (a) is a time domain location of a channel resource of an embodiment of channel sensing indication information;
fig. 1 (b) is another time domain location of channel sensing indication information;
fig. 1 (c) is an interception window of an embodiment of channel interception indication information;
fig. 2 (a) is a method flow of an embodiment of a channel sensing method;
fig. 2 (b) is a periodic reserved resource of an embodiment of the channel sensing method;
fig. 2 (c) is a first sensing resource of an embodiment of a channel sensing method;
fig. 2 (d) is a second sensing resource of the channel sensing method;
fig. 3 is an embodiment of a channel sensing terminal device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The innovation points of the invention are as follows: the invention provides a method for determining a channel listening period for re-evaluating periodically reserved resources; secondly, the invention defines the time domain and frequency domain resource positions of the interception channel; in conclusion, the invention provides a partial interception method for periodic re-evaluation of reserved resources, which greatly reduces the transmission collision probability and the interception power consumption of terminal channels.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1:
fig. 1 (a) shows a time domain location of a channel resource according to an embodiment of channel sensing indication information, fig. 1 (b) shows another time domain location of a channel resource according to an embodiment of channel sensing indication information, and fig. 1 (c) shows a listening window according to an embodiment of channel sensing indication information.
In the invention, the system design provides configuration information, wherein the configuration information comprises channel interception indication information used for periodically reserving transmission resource reevaluation, and the channel interception indication information is used for indicating an interception period and/or an interception channel resource position.
In the present invention, the periodically reserved transmission resources comprise a reservation period, a resource time domain location, a resource frequency domain location attribute, and the terminal sends a side link control information (SCI) indicating the periodically reserved transmission resources for transmitting a physical side link shared channel (PSSCH). The channel listening indication information may determine the listening period according to a reserved period of the periodic reserved transmission resource, may determine a time domain position in the listening channel resource position according to a time domain position of the periodic reserved transmission resource, and may determine a frequency domain position in the listening channel resource position according to a frequency domain position of the periodic reserved transmission resource.
The unit of the time domain position in the application of the invention is one time slot, or a plurality of time slots, or partial time slots; the frequency domain position is in units of subchannels.
It should be noted that the information indicated in the configuration information is written by network device sending and acquiring, other terminal device acquiring, or a default manner specified by a standard protocol.
In this embodiment, the channel sensing indication information at least includes one of the following information:
information 1: a Sensing Period (Sensing Period) represents a channel Sensing Period used by the terminal for periodically reserving the transmission resource for re-evaluation.
In this embodiment, the listening period Ps is a subset whose value is not higher than P in { P _1, P _2, P _3, \\ 8230, P _ M }, where P is a reservation period of the indicated periodic reserved transmission resource, P _1, P _2, P _3, \ 8230, P _ M is M reservation periods on a resource pool corresponding to the periodic reserved transmission resource, and P is one of { P _1, P _2, P _3, \\ 8230, P _ M }.
Assuming that a Reservation Period (Reservation Period) of a periodic Reservation transmission resource indicated by a terminal is P, M Reservation periods can be supported by a corresponding resource pool and are respectively P _1, P _2, P _3, \8230, and P _ M, where P is one of a Period set { P _1, P _2, P _3, \8230, and P _ M }; the corresponding listening period Ps corresponds to a subset with a value not higher than P in { P _1, P _2, P _3, \8230; P _ M }, and the terminal will initiate channel listening in the following listening period after indicating reservation of transmission resources.
For example, the set of transmission resource reservation periods supported on one resource pool is {100ms, 200ms, 300ms, 400ms, 500ms, 600ms, 700ms, 800ms, 900ms, 1000ms }, and the reservation period P indicated by the terminal is 500ms, then the corresponding sensing period Ps is a subset in the set of {100ms, 200ms, 300ms, 400ms, 500ms }, and it is assumed that the subset is {100ms, 200ms, 300ms, 400ms }, i.e. it means that the terminal will initiate channel sensing in the next {100ms, 200ms, 300ms, 400ms } after indicating the reserved transmission resources.
It should be noted that the listening period may also be in other configurations related or unrelated to the reservation period P.
Information 2: and intercepting the channel resource position, which represents the channel resource position needing to be intercepted in the channel interception period, and comprises an intercepted channel resource time domain position and an intercepted channel resource frequency domain position.
In this embodiment, the method for determining the time domain position of the listening channel resource position is at least one of the following:
the time domain position determining method comprises the following steps: if the periodically reserved transmission resources are indicated to occupy Y time domain positions as Ty in a reservation period, the corresponding time domain positions of the interception channel resource positions are [ Ty-Ps-Ts1, ty-Ps + Ts2].
Y =1,2, \ 8230, Y, ps is the listening period, ts1, ts2 are respectively the first and second durations, the values of Ts1, ts2 are 0, or are carried by the configuration information, or depend on the terminal implementation, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
For example, the time domain location of the intercepted channel resource may be configured as Ty-Ps, where Ty is a time domain location occupied by the reserved transmission resource in a reservation period, and Ps is the interception period. Specifically, suppose that the time domain position occupied by the reserved transmission resource indicated by the terminal in a reservation period is Ty (Y =1,2 \8230, Y, the reserved resource occupies Y time domain positions, where the time domain position may be one time slot, or multiple time slots, or a part of time slots), and the time domain position in the corresponding listening channel resource position is Ty-Ps, that is, the time domain position Ty-Ps of the resource to be listened, that is, the terminal needs to listen to the sub-channel (subchannel) corresponding to the time domain position Ty-Ps.
For another example, in fig. 1 (a), if the time domain position occupied by the reserved transmission resource of the terminal is { T1, T2}, and the listening period is Ps = { Ps1, ps2}, the time domain position in the corresponding listening channel resource position is { T1-Ps1, T2-Ps1, T1-Ps2, T2-Ps2}, where T1 and T2 are the first and second reserved time domain positions, respectively, and Ps1 and Ps2 are the first and second listening periods, respectively. It should be noted that, the values of the first and second sensing periods are not specifically limited.
Further, the time domain position in the listening channel resource position may also be configured as an interval [ Ty-Ps-Ts1, ty-Ps + Ts2], where Ts1 and Ts2 are the first duration and the second duration, respectively. The terminal needs to monitor the time domain position as one time slot, multiple time slots or partial time slots in the interval [ Ty-Ps-Ts1, ty-Ps + Ts2], that is, the terminal needs to monitor the sub-channel corresponding to the time domain position [ Ty-Ps-Ts1, ty-Ps + Ts2], wherein Ts1 and Ts2 can be carried by the configuration information, or realized by the terminal, or the configuration information indicates a threshold, and the value of Ts1 and Ts2 selected by the terminal is not lower than the corresponding threshold.
And a second time domain position determining method: if the periodically reserved transmission resources are indicated to occupy Y time domain positions as Ty in a reservation period, the corresponding time domain positions of the interception channel resource positions are [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2].
Y =1,2, \8230, Y, ty _ start is the minimum value of Ty (Y =1,2 \8230, Y), ty _ end is the maximum value of Ty (Y =1,2 \8230, Y), ps is the listening period, ts1 and Ts2 are respectively the first and second durations, the values of Ts1 and Ts2 are 0, or are carried by the configuration information, or depend on the terminal implementation, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
For example, in fig. 1 (b), the starting time domain position and the ending time domain position occupied by the reserved transmission resource of the terminal are T1 and T2 respectively, i.e., T1 is the minimum value of Ty (Y =1,2 \8230, Y,), T2 is the maximum value of Ty, the listening period is Ps = { Ps1, ps2}, and the corresponding listening time domain positions are the intervals [ T1-Ps1, T2-Ps1] and [ T1-Ps2, T2-Ps2].
Further, the time domain position in the listening channel resource position may also be configured as any one or more time slots within an interval [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2], where Ts1 and Ts2 are the first and second durations, respectively. That is, the terminal needs to listen to the sub-channel corresponding to the time domain location [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2], where Ts1 and Ts2 may be carried by configuration information, or implemented by the terminal, or the configuration information indicates a threshold and the values of Ts1 and Ts2 selected by the terminal are not lower than the corresponding thresholds.
In embodiment 1 of the present invention, the terminal may be configured to adopt at least one of the above time domain position determination methods, i.e. at least one of Ty-Ps, [ Ty-Ps-Ts1, ty-Ps + Ts2], [ Ty _ start-Ps, ty _ end-Ps ], or [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2].
In addition to the type-Ps, [ type-Ps-Ts 1, type-Ps + Ts2], [ type _ start-Ps, type _ end-Ps ], or [ type _ start-Ps-Ts1, type _ end-Ps + Ts2], the time domain position of the listening channel may further include a time window before reserving resources.
In this embodiment, the partial channel sensing indication information used by the terminal for re-evaluating the periodically reserved transmission resources may also stipulate that the terminal senses the channel within a time window before the reserved resources. Assuming that the starting time position of the reserved transmission resource indicated by the terminal or the transmission resource not indicated for pre-selection after re-evaluation is T _ start0, the terminal performs channel sensing in a time window [ T _ start0-W1, T _ start0- Δ T ], and re-evaluates the reserved transmission resource or the transmission resource not indicated for pre-selection after re-evaluation, where W1 may be carried by the configuration information, and Δ T is used for processing delay from sensing to preparing to send data, which may be system configuration or may depend on terminal implementation.
For example, as shown in fig. 1 (c), the terminal listens to the channel in a time window before reserving the resources, and the channel listening indication information indicates that channel listening is performed in a time window [ T _ start0-W1, T _ start0- Δ T ], where T _ start0 is a time domain starting position of reserved transmission resources in a reservation period or a pre-selected transmission resource is not indicated after re-evaluation, W1 is a window length, and Δ T is a processing delay.
In this embodiment, the frequency domain position of the listening channel resource position may be configured as: and the frequency domain position in the resource position of the interception channel is all sub-channels used for PSSCH transmission on a resource pool corresponding to PSSCH transmission. That is, the terminal correspondingly needs to monitor all sub-channels which can be used for psch transmission on the resource pool corresponding to the time domain position of the channel to be monitored, which is determined according to the above method.
In this embodiment, the frequency domain position of the listening channel resource position may be further configured to: the frequency domain position in the resource position of the listening channel is a sub-channel in a region [ Fy _ start-Fs1, fy _ end + Fs2] on a resource pool corresponding to psch transmission, where Fy _ start and Fy _ end are respectively the starting position and ending position of a frequency domain sub-channel that a periodically reserved transmission resource is indicated to occupy in a reservation period, fs1 and Fs2 are respectively a first frequency domain length and a second frequency domain length, and the value is 0, or are carried by the configuration information, or are realized depending on the terminal, or the configuration information indicates a threshold, and Fs1 and Fs2 values selected by the terminal are not lower than corresponding thresholds.
For example, suppose that the frequency domain position occupied by the reserved transmission resource indicated by the terminal in one reservation period is Fy (y =1,2 \8230;. F, suppose that the reserved resource occupies F sub-channels, and the sub-channel is the minimum unit allocated to the side link frequency domain resource, where the starting position of the frequency domain sub-channel of the reserved resource is Fy _ start, and the ending position of the frequency domain is Fy _ end, that is, fy _ start is the corresponding sub-channel minimum value in Fy (y =1,2 \8230; F), fy _ end is the corresponding sub-channel maximum value in Fy (y =1,2 \8230; F), and the terminal needs to listen to the corresponding sub-channel of [ Fy _ start, fy _ end ].
For another example, the frequency domain position in the resource position of the listening channel is a subchannel in a region [ Fy _ start-Fs1, fy _ end + Fs2] on the resource pool corresponding to the psch transmission, where Fs1 and Fs2 are respectively the first and second frequency domains long and have the same unit as Fy _ start. The terminal needs to monitor the sub-channel with the frequency domain position in the interval [ Fy _ start-Fs1, fy _ end + Fs 2]. The terminal correspondingly listens to a sub-channel in [ Fy _ start-Fs1, fy _ end + Fs2] corresponding to a time domain position of a channel to be listened, wherein Fs1 and Fs2 can be carried by configuration information or realized by the terminal, or the configuration information indicates a third threshold and a fourth threshold, fs1 selected by the terminal is not lower than the third threshold, and Fs2 value is not lower than the fourth threshold.
The configuration information corresponds to a configuration on one resource pool, and an enable (enable) flag or a disable (disable) flag can be configured on each resource pool to enable or disable a partial channel sensing mechanism for periodic reserved transmission resource re-evaluation. If the channel is forbidden, the terminal forbids a part of the channel interception mechanism and enables other channel interception mechanisms, such as a continuous channel interception mechanism; and if the partial channel sensing method is enabled, re-evaluating the reserved resources correspondingly according to the partial channel sensing method.
The embodiment 1 of the present invention provides a method for determining the location of the intercepted channel resource by using the interception period and the intercepted channel resource location included in the channel interception indication information for re-evaluating the periodically reserved transmission resource, so as to clarify a rule for re-evaluating the periodically reserved resource by partial interception, thereby effectively reducing the time domain collision probability of transmission and reducing the terminal interception time.
Example 2:
fig. 2 (a) is a method flow of an embodiment of a channel sensing method, fig. 2 (b) is a periodic reserved resource of the embodiment of the channel sensing method, fig. 2 (c) is a first sensing resource of the embodiment of the channel sensing method, and fig. 2 (d) is a second sensing resource of the embodiment of the channel sensing method, according to embodiment 2 of the present invention, channel sensing for re-evaluating the periodic reserved resource is implemented by a partial sensing method, and specifically, a channel sensing method includes the following steps:
step 101, obtaining the configuration information.
In step 101, the terminal obtains the configuration information, where the configuration information carries channel sensing indication information used by the terminal to periodically reserve transmission resource for reevaluation.
The channel sensing indication information used by the configuration information carrying terminal for periodically reserving transmission resource reevaluation at least comprises one of the following information: a listening period, a listening channel resource location, wherein the determination manner of the listening period has been described in embodiment 1 and is not described in detail here, the listening channel resource location includes a time domain location and a frequency domain location, has been described in embodiment 1, and is not discussed repeatedly here.
And 102, when the SCI indicates the periodically reserved transmission resources, re-evaluating the periodically reserved resources according to the channel sensing indication information contained in the configuration information.
In step 102, after the terminal transmits side link control information (SCI) indicating that the side link shared channel (psch) transmission resources are reserved and the reservation period, the periodic reserved resources are re-evaluated according to step 101.
The transmitting terminal sends the edge link control information indicating the reserved edge link shared channel transmission resources and the reserved period, and other terminals receive the SCI information and can identify the psch transmission resources and the reserved period (reserved period) indicated by the SCI.
For example, in fig. 2 (b), the SCI indicates that N (N is an integer greater than or equal to 1) psch transmission resources and a reservation period P within one W2 window are reserved, which indicates that, in the next multiple reservation periods, a terminal sending the SCI reserves N psch transmission resources corresponding to the same position within the W2 window of each next reservation period, and if the psch transmission resource position indicated by the SCI is tm, the corresponding resource position reserved in the subsequent jth (j is an integer greater than or equal to 1) period is tm + j × P ', where P' is a reservation period P indicated based on a field in the SCI or derived based on P.
In fig. 2 (c), the terminal re-evaluates the periodically reserved resources, assuming that the listening periods are Ps1 and Ps2, and the starting time domain position and the ending time domain position of the reserved resources in one reservation period are T1 and T2, respectively, if the terminal determines that the time domain positions of the listening channel are [ T1-Ps1-Ts1, T1-Ps1-Ts2], [ T1-Ps2-Ts1, T1-Ps2-Ts2], and the frequency domain positions are all sub-channels of the resource pool where the listening channel is located, when Ts1=0, ts2=2, the listening channel is as shown in fig. 2 (c).
Fig. 2 (d) is a schematic diagram of the location of the sensing channel resources further including the sensing time window characteristic on the basis of fig. 2 (c), that is, the configuration information further indicates that the terminal will perform channel sensing in the time window [ T1-W1, T1- Δ T ], where T1 is the starting time location of the reserved transmission resources indicated by the terminal or the pre-selected transmission resources are not indicated after re-evaluation, and Δ T is the processing delay.
The embodiment 2 of the invention provides a partial channel interception method, which supports a terminal to re-evaluate periodically reserved transmission resources, and through partial channel interception, on one hand, the transmission collision probability of a frequency domain and a time domain can be reduced, on the other hand, the channel interception power consumption of the terminal can be saved, and the engineering implementation is strong.
Example 3:
fig. 3 is an embodiment of a channel sensing terminal device, which uses the channel sensing method in embodiments 1 to 2 of the present invention, and in embodiment 3 of the present invention, a channel sensing terminal device includes: a configuration module 11, a sending module 12 and a receiving and evaluating module 13.
The configuration module is used for acquiring configuration information; the sending module is used for sending SCI, wherein the SCI indicates reserved transmission resources and a reserved period for PSSCH; the sending module is configured to send an SCI, where the SCI indicates a periodically reserved transmission resource for the psch; and the receiving evaluation module is used for receiving the monitoring detection SCI and re-evaluating the periodically reserved resources according to the configuration information.
The role of the configuration information in the embodiments of the present invention, that is, the method for re-evaluating the reserved transmission resources and the periodically reserved resources, has been discussed in detail in embodiments 1 and 2, and will not be described repeatedly herein.
In the embodiment of the present invention, each piece of indication information in the configuration information may be sent to the sending terminal through a network device, or the sending terminal writes in the device in a default manner according to a standard protocol.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus comprising the element.
The above description is only an example of the present invention and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A channel interception method is characterized in that configuration information comprises channel interception indication information used for periodical reserved transmission resource reevaluation, wherein the channel interception indication information is used for indicating an interception period and/or interception channel resource position;
the time domain position determining method for the interception channel resource position comprises the following steps:
if the periodically reserved transmission resources are indicated to occupy Y time domain positions Ty in a reserved period, the corresponding time domain positions of the interception channel resource positions are [ Ty-Ps-Ts1, ty-Ps + Ts2];
y =1,2, \ 8230, Y, ps is the listening period, ts1, ts2 are the first and second durations, respectively, the value of Ts1, ts2 is 0, or is carried by the configuration information, or is implemented depending on the terminal, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
2. A channel interception method is characterized in that configuration information comprises channel interception indication information used for periodical reserved transmission resource reevaluation, wherein the channel interception indication information is used for indicating an interception period and/or interception channel resource position;
the time domain position determining method for the interception channel resource position comprises the following steps:
if the periodically reserved transmission resources are indicated to occupy Y time domain positions Ty in a reserved period, the occupied time domain starting position is Ty _ start, and the occupied time domain ending position is Ty _ end, the corresponding time domain positions of the interception channel resource positions are [ Ty _ start-Ps-Ts1, ty _ end-Ps + Ts2];
y =1,2, \ 8230, Y, ty _ start is the minimum value of Ty (Y =1,2, \ 8230, Y), ty _ end is the maximum value of Ty (Y =1,2 \8230, Y), ps is the listening period, ts1, ts2 are the first and second durations, respectively, the values of Ts1, ts2 are 0, or are carried by the configuration information, or depend on the terminal implementation, or the configuration information indicates the first and second thresholds, and the value of Ts1 selected by the terminal is not lower than the first threshold, and the value of Ts2 is not lower than the second threshold.
3. A channel interception method is characterized in that configuration information comprises channel interception indication information used for periodical reserved transmission resource reevaluation, wherein the channel interception indication information is used for indicating an interception period and/or intercepting the position of channel resources;
the frequency domain position in the resource position of the listening channel is a sub-channel in a region [ Fy _ start-Fs1, fy _ end + Fs2] on a resource pool corresponding to PSSCH transmission, wherein Fy _ start and Fy _ end are respectively a frequency domain sub-channel starting position and a sub-channel ending position which are indicated to be occupied by periodically reserved transmission resources in a reserved period, fs1 and Fs2 are respectively a first frequency domain length and a second frequency domain length, and the value is 0, or the information is carried by the configuration information, or the configuration information indicates a threshold, and Fs1 and Fs2 values selected by the terminal are not lower than the corresponding thresholds.
4. A channel interception method is characterized in that configuration information comprises channel interception indication information used for periodical reserved transmission resource reevaluation, wherein the channel interception indication information is used for indicating an interception period and/or interception channel resource position;
the channel interception indication information is further configured to indicate that channel interception is performed in a time window [ T _ start0-W1, T _ start0- Δ T ], where T _ start0 is a time domain starting position of a reserved transmission resource in a reservation period or a transmission resource that is not indicated for pre-selection after re-evaluation, W1 is a window length, and Δ T is a processing delay.
5. The channel sensing method according to any one of claims 1 to 4, wherein the sensing period is determined by: the listening period Ps is a subset with a value not higher than P in { P _1, P _2, P _3, \ 8230, P _ M }, wherein P is a reservation period of the indicated periodic reserved transmission resource, P _1, P _2, P _3, \ 8230, P _ M is M reservation periods on a resource pool corresponding to the periodic reserved transmission resource, and P is one of { P _1, P _2, P _3, \ 8230, P _ M }.
6. The channel sensing method according to any one of claims 1 to 2 or 4, wherein the sensing channel resource location has a middle frequency domain position corresponding to all sub-channels used for PSSCH transmission in a resource pool corresponding to PSSCH transmission.
7. The channel sensing method according to any one of claims 1 to 4, wherein a resource pool corresponding to the configuration information includes an enabling or disabling flag, and the enabling or disabling flag is used to enable or disable a partial channel sensing mechanism of the periodically reserved transmission resource re-evaluation.
8. The channel sensing method according to any one of claims 1 to 4, wherein the information indicated in the configuration information is written in a default manner by network equipment sending and acquiring, other terminal equipment sending and acquiring, or a standard protocol.
9. The channel sensing method according to any one of claims 1 to 4, comprising the steps of:
acquiring the configuration information;
and when the SCI indicates the periodically reserved transmission resources, re-evaluating the periodically reserved resources according to the channel sensing indication information contained in the configuration information.
10. A channel sensing terminal device, configured to implement the method according to any one of claims 1 to 9, and comprising:
the configuration module is used for acquiring configuration information;
a transmitting module for transmitting an SCI, wherein the SCI indicates a periodically reserved transmission resource for the PSSCH;
and the receiving evaluation module is used for receiving the monitoring detection SCI and re-evaluating the periodically reserved resources according to the configuration information.
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