CN108632781B - Resource selection or reselection method in vehicle-to-outside communication and user equipment - Google Patents

Resource selection or reselection method in vehicle-to-outside communication and user equipment Download PDF

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CN108632781B
CN108632781B CN201810036887.8A CN201810036887A CN108632781B CN 108632781 B CN108632781 B CN 108632781B CN 201810036887 A CN201810036887 A CN 201810036887A CN 108632781 B CN108632781 B CN 108632781B
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channel detection
result
resource
reporting
terminal
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CN108632781A (en
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张世昌
李迎阳
王轶
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority to EP18772610.4A priority Critical patent/EP3574694A4/en
Priority to US16/490,408 priority patent/US11102631B2/en
Priority to PCT/KR2018/003478 priority patent/WO2018174661A1/en
Publication of CN108632781A publication Critical patent/CN108632781A/en
Priority to US17/444,458 priority patent/US11659371B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a resource selection or reselection method and User Equipment (UE) in vehicle-to-outside (V2X) communication. The method comprises the steps of: detecting physical bypass control channels (PSCCHs) transmitted by other UEs; selecting a single subframe resource from the single subframe resources which are not overlapped with the single subframe resources reserved by the detected PSCCH; and transmitting a physical bypass shared channel (PSSCH) on the selected subframe resource.

Description

Resource selection or reselection method in vehicle-to-outside communication and user equipment
Technical Field
The present invention relates generally to communication technology, and more particularly, to a resource selection or reselection method in vehicle-to-outside (V2X) communication and a User Equipment (UE) performing the method.
Background
In the third generation partnership project (3 GPP) standard, the direct communication link between devices is called a bypass (Sidelink), and similar to the uplink and downlink, there are control channels and data channels on the bypass, the former is called a physical bypass control channel (english: physical Sidelink Control CHannel, acronym: PSCCH), and the latter is called a physical bypass shared channel (english: physical Sidelink Shared CHannel, acronym: PSSCH). The PSCCH is used to indicate a time-frequency domain resource location of PSSCH transmission, a modulation coding scheme, a priority of data carried in the PSSCH, and the like, and the PSSCH is used to carry data.
Control information and data in vehicle-to-outside communication (english: vehicle to Vehicle/perderstrian/Infrastructure/Network, acronym: V2X) can be transmitted by bypass, where V2X communication includes two transmission modes, namely transmission Mode 3 (Mode 3) and transmission Mode 4 (Mode 4). For Mode 3, the PSCCH and PSSCH transmission resources of one UE (referred to as V2X UE, hereinafter the same) are allocated by an evolved node B (eNB), and the UE determines the PSCCH and PSSCH transmission resources by receiving a bypass resource allocation indication transmitted by the eNB through a Physical Downlink Control Channel (PDCCH) or an Evolved PDCCH (EPDCCH). In Mode 4, the transmission resources of the PSCCH and the PSSCH are selected by the UE according to the channel detection result. In the channel detection process, the UE firstly determines the time-frequency resource position and the priority of a scheduled PSSCH by receiving PSCCH sent by other UE, then further detects the demodulation reference signal received power (PSSCH-RSRP) of the scheduled PSSCH, and excludes resources with PSSCH-RSRP higher than a specific threshold; the UE then calculates the average received energy (S-RSSI) of the remaining resources and finally randomly selects one resource from the partial resources with the lowest S-RSSI as the transmission resource.
In the 3GPP standard of Rel-14, the use of Mode 3 or Mode 4 by the UE is configured by a resource pool, and in order to ensure that the time-frequency resources allocated to the UE using Mode 3 are not interfered by other UEs, the Mode 3 resource pool and the Mode 4 resource pool should be orthogonal to each other. However, since the resource pool is semi-statically configured, and the number of UEs using a certain resource pool is dynamically changed, if the resources in the resource pool are not coordinated with the number of UEs using the resource pool, the resources in the resource pool may be wasted or insufficient, so configuring multiple resource pools is not beneficial to improving the utilization efficiency of time-frequency resources, and may also negatively affect the performance of the V2X system.
From the above analysis, it can be seen that, from the standpoint of resource utilization efficiency and V2X system performance, mode 3 and Mode 4 UEs should be able to operate in the same resource pool, however, in this case, how to effectively avoid or reduce mutual interference between Mode 3 UEs and Mode 4 UEs is not yet available.
Disclosure of Invention
According to an aspect of the present invention, there is provided a resource selection or reselection method performed by a User Equipment (UE) in vehicle-to-outside (V2X) communication, comprising the steps of: detecting physical bypass control channels (PSCCHs) transmitted by other UEs; selecting a single subframe resource from the single subframe resources which are not overlapped with the single subframe resources reserved by the detected PSCCH; and transmitting a physical bypass shared channel (PSSCH) on the selected subframe resource.
According to another aspect of the present invention, there is provided a user equipment UE for performing a resource selection or reselection method in vehicle-to-outside V2X communication, comprising: the detection module is used for detecting a physical bypass control channel PSCCH sent by other UE; a resource selection or reselection module configured to select a monocot resource from the monocot resources that do not overlap the detected PSCCH reserved monocot resource; and a transmission module that transmits the physical bypass shared channel PSSCH on the selected single subframe resource.
By the method and the device, interference on the PSCCH scheduling and reserved single subframe resources can be better avoided, the utilization efficiency of time-frequency resources can be improved, and the performance of a V2X system is improved.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a resource selection or reselection method in accordance with an embodiment of the present invention;
fig. 2 is a block diagram of a User Equipment (UE) performing a resource selection or reselection method in V2X communication according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, "user equipment" and "terminal equipment" are understood by those skilled in the art to include both wireless signal receiver equipment having only wireless signal receiver equipment without transmitting capabilities and receiving and transmitting hardware equipment having receiving and transmitting hardware capable of bi-directional communication over a bi-directional communication link. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (Personal Communications Service, personal communication system) that may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant ) that can include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (Global Positioning System ) receiver; a conventional laptop and/or palmtop computer or other appliance that has and/or includes a radio frequency receiver. As used herein, "user equipment," "terminal equipment," may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or adapted and/or configured to operate locally and/or in a distributed fashion, and/or at any other location(s) on earth and/or in space. The "user equipment" and "terminal equipment" used herein may also be communication terminals, internet surfing terminals, music/video playing terminals, for example, PDAs, MIDs (Mobile Internet Device, mobile internet devices) and/or mobile phones with music/video playing functions, and may also be devices such as smart televisions, set top boxes, etc.
In order to improve the resource utilization and improve the performance of the V2X system, the UE using Mode 3 and the UE using Mode 4 need to operate in the same resource pool. In this case, in order to avoid or reduce mutual interference between two UEs, the present application proposes a resource selection and reselection method in V2X communication.
FIG. 1 is a flow chart of a resource selection or reselection method in accordance with an embodiment of the present application.
Referring to fig. 1, in step 101, a UE detects a physical bypass control channel (PSCCH) (abbreviated SCI X) in the format of bypass control information (Sidelink Control Information, SCI) X transmitted by other UEs. For example, the UE is a UE employing Mode 4. The UE detects PSCCH transmitted by other UEs to obtain at least one of the following information: the PSCCH transmits a transmission mode employed by the UE, a priority of a PSCCH scheduled PSCCH, a PSCCH frequency domain resource location of the PSCCH schedule, a resource reservation period indicated by the PSCCH, etc.
The UE may detect SCI X on all PSCCH resources in the UE's currently selected transmission resource pool or only on a portion of the PSCCH resources of the UE's currently selected transmission resource pool, e.g., the UE determines the location of the portion of PSCCH resources by receiving signaling from the eNB. For example, the UE detects SCI X on only the last PSCCH resource in the frequency domain in each subframe within the currently selected transmit resource pool, or on only the last PSCCH resource in the frequency domain in a subframe within the currently selected transmit resource pool.
In step 102, the UE selects a monocot resource among the monocot resources that do not overlap the detected PSCCH reserved monocot resources.
Defining a single-subframe resource (single-subframe resource) R x,y For TTIL starting from subchannel x subCH A number of consecutive sub-channels, where y represents TTI->Relative index, L, within resource pool subCH The number of sub-channels used for PSSCH transmission is indicated by the UE higher layer decision. If the UE performs resource selection or reselection in subframe n, the UE shall [ n+T ] 1 ,n+T 2 ]Continuous L on any one of subframes belonging to resource pool within range subCH The sub-channels are considered as candidate single subframe resources, where T 1 And T 2 Is determined by the UE implementation, and T 1 ≤4，20≤T 2 Less than or equal to 100, and recording the total number of the sub-frame resources as M total ，M total The set of candidate single subframe resources is S. It should be noted that if the UE in the resource pool adopts multiple TTI lengths, for example, some UEs adopt TTI with 1ms length and other UEs adopt TTI with 0.5ms length, the TTI length of the single subframe resource can be considered to be the same as the TTI length adopted by the UE when the UE performs resource selection or reselection.
For any one of the single subframe resources R in the set S x,y If there is a variable j e {0, 1., resel -1} enables a single subframe resource Overlap with reserved resources indicated in SCI X, where C resel Representing the number of times resources are intended to be reserved after UE resource reselection, P rsvp_TX Indicating a resource reservation interval assumed when determining available candidate monocot resources for the UE high-level indication, the UE will select or reselect the monocot resources R when selecting or reselecting the resources x,y And (5) excluding.
According to one embodiment of the invention, if the detected SCI X is in a particular format, a single subframe resource is selected among the single subframe resources that do not overlap with the single subframe resources reserved for the detected PSCCH.
According to another embodiment of the present invention, if the detected SCI X is in a specific format, and the Priority field (Priority) value prio contained in the SCI X RX Above a certain value, a single subframe resource is selected from the single subframe resources that do not overlap with the single subframe resources reserved for the detected PSCCH.
For example, the specific PSCCH format is SCI1 defined in 3GPP release 14, or a different format from SCI1 defined in 3GPP release 14, or the same number of bits as SCI1 defined in 3GPP release 14, and the meaning of each field is the same, but one or more specific bits in the reserved bit field are 1.
According to yet another embodiment of the present invention, the UE further measures the bypass reference signal received power (PSSCH-RSRP) of the PSSCH scheduled by SCI X, if the PSSCH-RSRP is above a certain threshold Selecting a single subframe resource from the single subframe resources which are not overlapped with the single subframe resources reserved by the detected PSCCH. Specifically, the priority field contained in SCI X has a value of prio RX The monocot frame resource where PSSCH scheduled by SCI X is located is R xr,m And the UE is in a single subframe resource R xr,m The value of PSSCH-RSRP measured above is greater thanWherein prio is TX A value of a priority field in a PSCCH transmitted next representing a UE high-layer indication, Δ being an eNB configured or preconfigured value, +.>Represents the ith SL-ThresPSSCH-RSRP in SL-ThresPSSCH-RSRP-List-r14 defined in 3GPP Standard 36.331V14.1.0, where i= (prio) TX +Δ)*8+prio RX +1, then the UE will have a single subframe resource R when selecting or reselecting the resource x,y Excluding from S.
The UE further excludes resources in set S in the manner defined in 3GPP release 14.
In step 103, the UE transmits a physical bypass shared channel (PSSCH) on the selected single subframe resource.
The above technical scheme of the present application is further described below in terms of a mode of interaction between devices in conjunction with a specific application.
Case one
In case one, SCI X is type one, which may be a new PSCCH format different from the existing SCI 1 (i.e. SCI 1 defined in 3GPP release 14), or type one has the same number of bits as the existing SCI 1 at present and the meaning of each field is the same, but one or more specific bits in the reserved bit field may be 1 (all bits in the reserved bit field in the existing SCI 1 are 0). When the UE performs resource selection or reselection, selecting a single subframe resource from the single subframe resources which are not overlapped with the single subframe resources reserved by the detected PSCCH. The method comprises the following specific steps:
In step 201, the UE detects scix transmitted by other UEs.
For example, in this case, the UE transmitting SCI X is the UE employing Mode 3.
According to one implementation of the present case, the UE employing Mode 3 determines the value of each field in SCI X by receiving the physical layer control signaling of the eNB, where the physical layer signaling should at least include the value of the "number of subframes in the resource pool corresponding to the resource reservation interval" field in the indicated SCI X, and the value of the "number of subchannels and positions of subchannels contained in the frequency resource" field in SCI X. Preferably, the physical layer signaling is UE-specific signaling, scrambled by a specific cell radio network temporary identity C-RNTI, and the UE to be selected as the transmitting UE of SCI X is determined by the eNB implementation. According to another implementation manner of the present case, the UE adopting Mode 3 determines the value of each field in SCI X by receiving a physical layer control signaling and a higher layer signaling of the eNB, where the physical layer signaling should at least include the value of the "number of subframes in the resource pool corresponding to the resource reservation interval" field in the indicated SCI X, and the higher layer signaling should include the value of the "number of subframes in the resource pool corresponding to the resource reservation interval" field in the indicated SCI X. The physical layer control signaling in the two implementations should be different from the downlink control indication format 5A (DCI 5A) defined in the current standard, and the UE that receives the physical layer control signaling only sends SCI X according to the indication, and does not send PSSCH on the indicated frequency resource.
In one implementation of the present case, SCI X is different from the existing SCI 1, and the content of SCI X should contain one or more of the following information: priority information, the number D1 of subframes in a resource pool corresponding to the resource reservation interval, CRC, the subframe interval G1 of the first reserved resource, and the number and the position of the subchannels contained in the single subframe resource. Wherein the subframe location of the first reserved resource indicates the interval between the subframe in which SCI X is located and the subframe in which the first reserved resource is located. If the subframe in which SCI X is located is M, in this case, the UE considers that the resources indicated by the "number of subchannels and positions of subchannels contained in the frequency resources" field on subframe m+j×g1+i×d1 are reserved, where i=0, 1,2, …, the values of M-1, M are defined by the standard or configured by the eNB, and M may be positive infinity; j=0 and/or 1, the specific values being defined by standards or configured by the eNB. It should be noted that, if D1 in SCI X is indicated as a specific value, for example, 0, or, SCI X does not include "the number of subframes D1 in the resource pool corresponding to the resource reservation interval", the UE may replace D1 in the formula m+j×g1+i×d1 with Pstep or Pmin, where Pstep is the basic resource reservation step size of the current resource pool and Pmin is the minimum resource reservation interval supported by the current resource pool, and the UE determines the specific values of these two parameters by receiving eNB signaling, standard definition, or pre-configuration.
According to implementation two of the present case, the domains included in SCI X and the existing SCI 1 are the same as the number of bits in each domain, and one or some specific bits in 7 bits of the reserved bit domain are 1, for example, the first bit of the reserved bit domain is 1, so as to distinguish SCI X from SCI 1. If the subframe in which SCI X is located is M, then in this case the UE considers that the resources indicated by the "frequency resource location and number of included subchannels" field on subframe m+j×g2+i×d2 are reserved, where i=0, 1,2, …, M-1, the value of M is defined by the standard or configured by the eNB, and M may be positive infinity; j=0 and/or 1, the specific values being defined by standards or configured by the eNB; g2 is the value of the primary and retransmission interval field (Time gap between initial transmission and retransmission) in SCI 1, and D2 is the number of subframes corresponding to the value (Resource reservation) of the resource reservation interval field in SCI 1.
In step 202, for any one of the single subframe resources R in the set S x,y If there is a variable j e {0, 1., resel -1} enables a single subframe resourceOverlap with reserved resources indicated in SCI X, where C resel Representing the number of times resources are intended to be reserved after UE resource reselection, P rsvp_TX Indicating a resource reservation interval assumed when determining available candidate monocot frame resources for a UE high level indication, the UE will select or reselect the monocot frame resources R x,y Excluding from S. Alternatively, if the SCI X contains a Priority domain (Priority) value prio RX Above a certain value, the UE selects or reselects the resources R x,y Excluding from S.
The UE may further exclude resources in set S in the manner defined in 3GPP release 14.
The UE randomly selects one of the remaining resources for data transmission.
In step 203, the UE transmits a PSCCH on a PSCCH resource corresponding to the selected monocot resource and transmits a PSSCH on the selected monocot resource.
Case two
In case two, SCI X may be of type two and type three, where type two is identical to existing SCI 1 (i.e., SCI 1 defined in 3GPP release 14), and preferably the transmitting UE of type two is a Rel-14 UE operating in mode 3. Type three is different from SCI 1, e.g. the value of one or more specific bits of the reserved bit field is 1, preferably the transmitting UE of type three is a new version UE operating in mode 4. According to the first implementation mode of the present case, if the data sent by the new version UE operating in mode 3 needs to be received by the UE, then the type two SCI sent by the new version UE of mode 3; according to the second implementation mode of the present case, if the data sent by the new version UE operating in mode 3 needs to be received by the UE, the new version UE of mode 3 sends a type three SCI. Meanwhile, SCI X type one, type two, type three are different from each other. If the SCI X received by the UE is of the type II, after the UE receives the SCI X, the UE can further measure PSSCH-RSRP of PSSCH scheduled by the SCI X, when the UE performs resource selection or reselection, the UE directly excludes any one of the candidate single-subframe resources S if the one of the candidate single-subframe resources is possibly overlapped with the single-subframe resource reserved by the UE sending the SCI X; alternatively, if it may overlap with the monocot resources reserved by the UE transmitting SCI X and the measured PSSCH-RSRP is greater than a certain threshold, the UE shall exclude the monocot resources; preferably, the value of the specific threshold should be higher than Wherein prio is RX For SCI X to contain a Priority field (Priority) value, priority TX A value representing the priority field in the next transmitted PSCCH indicated by the UE higher layer,represents the ith SL-ThresPSSCH-RSRP, i=prio in SL-ThresPSSCH-RSRP-List-r14 defined in 3GPP Standard 36.331V14.1.0 TX *8+prio RX +1. If the SCI X received by the UE is of the type III, the UE further measures PSSCH-RSRP of the scheduled PSSCH after receiving the SCI X, and when the UE performs resource selection or reselection, the UE excludes any one of the candidate single-subframe resource sets S if the single-subframe resource sets possibly overlap with the single-subframe resource reserved in the SCI X and the measured PSSCH-RSRP is larger than a certain specific threshold. Preferably, the following operation is performed only within a specific resource pool configured by the UE operating eNB, for example, the specific resource pool is a transmission resource pool configured to the 3GPP release 14mode 3 UE. The method comprises the following steps:
in step 301, the UE detects scix transmitted by other UEs.
In this case, if the SCI X received by the UE in subframe m is identical to the existing SCI 1, the UE may determine the reserved resources by two methods:
the method comprises the following steps: the UE considers the subframe m+j×G3+i×D3 l The resources indicated by the "frequency resource location and number of included subchannels" field on the table are reserved, wherein i=0, 1,2, …, M-1, the value of M is defined by the standard or configured by the eNB, and M can be positive infinity, and it is required to be specially explained that the value of M can be equal to D3 l Value-dependent, e.g. when D3 l At 100, M has a value of 1, if D3 l When p is less than 100, M is equal to 100/p; j=0 and/or 1, the specific values being defined by standards or configured by the eNB; g3 is the value of the primary and retransmission interval field (Time gap between initial transmission and retransmission) in SCI 1; l=0, 1, …, N-1, set { D3 0 ,D3 1 ,D3 2 ,…,D3 N-1 The values of the elements in the sequence are indicated by the eNB through RRC layer signaling or physical layer signaling, and in case of implementation one, the set may represent the number of subframes corresponding to SPS periods that may be adopted by the UE of Rel-14 operating in mode 3 in the current resource pool, and in case of implementation two, the set may represent the number of subframes corresponding to SPS periods that may be adopted by the UE operating in mode 3 in the current resource poolThe number of subframes corresponding to SPS periods that the UE of Rel-14 may employ, and a new version of the UE operating in mode 3 that sends data that needs to be received later to the UE.
The second method is as follows: if the number of subframes corresponding to the value (Resource reservation) of the resource reservation interval field in SCI X is zero, the UE determines reserved resources according to a first method; if the number of subframes corresponding to the value (Resource reservation) of the resource reservation interval field in SCI X is greater than zero, consider that the resources indicated by the "frequency resource location and number of included subchannels" field on subframe m+j×g3+i×d3 are reserved, where i=0, 1,2, …, the value of M-1, M is defined by the standard or eNB, and M may be positive infinity, it is specifically stated that the value of M may be related to the value of D3, for example, when D3 is 100, the value of M is 1, and if D3 is p and p is less than 100, M is equal to 100/p; j=0 and/or 1, the specific values being defined by standards or configured by the eNB; g3 is the value of the primary and retransmission interval field (Time gap between initial transmission and retransmission) in SCI 1, and D3 is the number of subframes corresponding to the value (Resource reservation) of the resource reservation interval field in SCI X.
If SCI X and the existing SCI 1 received by the UE in subframe m are not identical, for example, the number of bits in the domain and each domain included in SCI X is identical to SCI 1 but one or some specific bits in the reserved bit domain are 1, the UE considers that the resources indicated by the "frequency resource location and number of included subchannels" domain on subframe m+j×g4+d4 are reserved, j=0 and/or 1, the specific values being defined by the standard or configured by the eNB; g4 is the value of the primary and retransmission interval field (Time gap between initial transmission and retransmission) in SCI X, and D4 is the number of subframes corresponding to the value (Resource reservation) of the resource reservation interval field in SCI X.
In step 302, if SCI X is type two, for any one of the monocot frame resources R in the set S x,y If there is a variable j e {0, 1., resel -1} enables a single subframe resourceOverlap with reserved resources indicated in SCI X, where C resel Indicating that resources are intended to be reserved after UE resource selection or reselectionNumber of sources, P rsvp_TX Indicating a resource reservation interval assumed when determining available candidate monocot frame resources for a UE high level indication, the UE will select or reselect the monocot frame resources R x,y Excluding from S. Alternatively, for any one of the single subframe resources R in the set S x,y There is one variable j e {0, 1., c. resel -1} enables a single subframe resource +.>Overlap with reserved resources indicated in SCI X, where C resel Representing the number of times resources are intended to be reserved after UE resource selection or reselection, P rsvp_TX A resource reservation interval assumed when determining available candidate single subframe resources, representing a UE high-level indication, if SCI X contains a Priority field (Priority) value prio RX Above a certain value, the UE selects or reselects the resources R x,y Excluding from S. Alternatively, for any one of the single subframe resources R in the set S x,y There is one variable j e {0, 1., c. resel -1} enables a single subframe resource +.>Overlap with reserved resources indicated in SCI X, where C resel Representing the number of times resources are intended to be reserved after UE resource selection or reselection, P rsvp_TX Representing a resource reservation interval assumed when determining available candidate single subframe resources for a UE high-level indication, if the UE measures PSSCH-RSRP of a PSSCH scheduled by SCI X and the measured PSSCH-RSRP has a value greater than +.>Or->Wherein prio is TX A value of a priority field in a PSCCH transmitted next, which represents a UE high-layer indication, Δ is an eNB configured or preconfigured value, th a,b Represents the ith SL-ThresPSSCH-RSRP in SL-ThresPSSCH-RSRP-List-r14 defined in 3GPP standard 36.331V14.1.0, where i=a.8+b+1, then the UE is at resource Source selection or reselection of a monocot frame resource R x,y Excluding from S.
In this case, if SCI X is of type three, the UE should measure PSSCH-RSRP of the PSSCH scheduled by SCI X, for any one of the single subframe resources R in the set S x,y There is one variable j e {0, 1., c. resel -1} enables a single subframe resourceOverlap with reserved resources indicated in SCI X, where C resel Representing the number of times resources are intended to be reserved after UE resource selection or reselection, P rsvp_TX A resource reservation interval assumed when determining available candidate single subframe resources, representing a UE high-level indication, if the measured value of PSSCH-RSRP is greater than +.>Wherein prio is TX A value of the priority field in the subsequently transmitted PSCCH indicating a UE high-layer indication,/-, for example>Represents the ith SL-ThresPSSCH-RSRP in SL-ThresPSSCH-RSRP-List-r14 defined in 3GPP Standard 36.331V14.1.0, where i=prio TX *8+prio RX +1, then the UE will have a single subframe resource R at resource selection or reselection x,y Excluding from S.
The UE may further exclude resources in set S in the manner defined in 3GPP release 14.
The UE randomly selects one of the remaining resources for data transmission.
In step 303, the UE transmits a PSCCH on a PSCCH resource corresponding to the selected monocot resource and transmits a PSSCH on the selected monocot resource.
For a UE operating in mode 3, when the PSCCH is transmitted, the value of the priority field in the PSCCH may be set to a value lower than the priority indicated by the higher layer, and in particular, if the priority indicated by the higher layer is pr, the value of the priority field in the PSCCH transmitted by the UE may be set to pr- Δ, where Δ is a specific value, configured by the eNB, defined by the standard, or preconfigured. In this way, UEs operating in mode 3 can be better protected.
Case three
In the third case, SCI X may be of type one, type two or type three, if SCI X received by the UE is of type one or type two, after receiving SCI X, the UE may further measure PSSCH-RSRP of the PSSCH scheduled by SCI X, and when the UE performs resource selection or reselection, for any one of the candidate monocot frame resources S, if it overlaps with the monocot frame resource reserved in SCI X, the UE shall directly exclude the monocot frame resource; alternatively, if it overlaps with the reserved subframe resources in SCI X and the measured PSSCH-RSRP is greater than a certain threshold, the UE shall exclude the subframe resources. If the SCI X received by the UE is of the type III, the UE further measures PSSCH-RSRP of the scheduled PSSCH after receiving the SCI X, and when the UE performs resource selection or reselection, the UE excludes any one of the candidate single-subframe resource sets S if the single-subframe resource sets overlap with the single-subframe resource reserved in the SCI X and the measured PSSCH-RSRP is larger than a certain specific threshold. The method comprises the following steps:
In step 401, the UE detects SCI X.
In this case, if SCI X received by the UE in subframe m is of type one, the manner and situation of determining the reserved resource by the UE are the same, and will not be described here again. If SCI X received by the UE in frame m is of type two or type three, the manner and situation of determining the reserved resource by the UE are the same, and will not be described here again.
In step 402, if SCI X is of type one, the UE shall exclude the monocot frame resources in set S overlapping with the SCI X reserved resources in the manner of embodiment one; if SCI X is of type two or type three, the UE shall exclude the single subframe resources in set S that overlap with the SCI X reserved resources in the manner of embodiment two. And will not be described in detail herein. The UE may further exclude resources in set S in the manner defined in 3GPP release 14.
The UE randomly selects one of the remaining resources for data transmission.
In step 403, the UE transmits the PSCCH on a PSCCH resource corresponding to the selected monocot resource and transmits the PSSCH on the selected monocot resource.
Case four
In case four, the UE is operating in Mode 3, SCI X is type two. When the UE receives a change in the resources allocated by the eNB signaling, for example, the data generation period or the subframe offset indicated by SCIX is changed, the UE performs channel detection on at least the resources indicated by the eNB or on a part of the resources, and selects or reselects the resources according to the detection result. The method comprises the following steps:
The UE starts to perform channel detection after receiving the bypass resource allocation indication (i.e., DCI 5A) sent by the eNB.
According to the first implementation mode of the present case, if the monocotyledonous frame resource allocated by the eNB is R x , y The UE shall detect the single subframe resourcesWherein P is step The values representing the basic resource reservation periods, j=1, 2,3, … I1, within the current resource pool are defined by the standard, the eNB configured or preconfigured, representing the maximum detection period, e.g. i1=10 or 1, or 5.
According to the second implementation mode of the present case, if the monocotyledonous frame resource allocated by the eNB is R x,y The UE shall detect the single subframe resourcesWhere j=1, 2,3, … I2, the value of I2 is defined by the standard, the eNB configured or preconfigured, representing the maximum detection period, e.g. i2=10, or 1, or 5. Wherein P is rsvp_TX A period is reserved for the current resources of the UE, which value is indicated by the eNB.
According to the third implementation mode of the present case, if the monocotyledonous frame resource allocated by the eNB is R x,y The UE shall detect the single subframe resource R x,y+j×Pm Where j=1, 2,3, … I3, the value of I3 is defined by a standard, eNB configured or preconfigured, representing a maximum detection period, e.g. i2=10, or 1, or 5; pm is the minimum resource reservation period supported in the current resource pool.
According to the fourth implementation mode of the present case, if the monocotyledonous frame resource allocated by the eNB is R x,y The UE should detect subframe y. The UE receives SCI X in subframe y and this SCI X schedules resources or reserved resources andj=1, 2,3, … overlap and the PSSCH-RSRP of the SCI X scheduled resource exceeds the threshold, then resource +.>Not usable. Alternatively, the UE may also determine the resource based on the S-RSSI measured by subframe y and compared to a specific threshold>Whether it is available. The specific threshold is defined by a standard, configured or preconfigured by the eNB. Wherein P is rsvp_TX A period is reserved for the current resources of the UE, which value is indicated by the eNB.
According to the fifth implementation manner of the present embodiment, if the monocotyledonous frame resource allocated by the eNB is R x,y Then the UE shall detect subframe y+i 4 ×P rsvp_TX The value of I4 is defined by the standard, the eNB configured or preconfigured, representing the maximum detection period, e.g. i4=10, or 1, or 5, for the previous subframe, to determine the resourcej=0, 1,2, … is available. If SCIX is received and this SCIX scheduled resource or reserved resource is associated +.>Overlapping and PSSCH-RSRP of the SCI X scheduled resource exceeding a threshold, resource +.>Not usable. Alternatively, the UE may also be based on subframe y+i 4 ×P rsvp_TX The S-RSSI of the previous measurement is compared with a specific threshold to judge the resource +.>Whether it is available. For example, for P rsvp_TX ＝k×P step K=1, 1/2,1/5,S-RSSI is at resource +. >j=0, 1, … I4-1; p pair P rsvp_TX ＝k×P step ，k>1, S-RSSI is in resource +.>j＝0,1,…(I 4 ×P rsvp_TX )/P step -1 average value of the measured S-RRSI. The specific threshold is defined by a standard, configured or preconfigured by the eNB. Wherein P is rsvp_TX A period is reserved for the current resources of the UE, which value is indicated by the eNB.
According to a sixth implementation of the present embodiment, the UE starts to perform the detection operation when the UE expects the base station to change the periodicity or subframe offset of the configured SPS resources. For example, the UE transmits information of traffic change, for example, periodic change, or change of subframe offset generated in the period, etc., to the base station; or the base station transmits indication information to the UE informing the UE that the periodicity or subframe offset of the SPS resources may be changed. When the UE receives SCI X of the base station, the single-subframe resource allocated by the eNB is assumed to be R x,y Detected subframe before UE subframe y and judging resourcej=1, 2, … is available. For any value of j in the above range of values of j, if SCIX is received and this SCIX schedules resources or reserved resources andoverlapping and PSSCH-RSRP of the SCIX scheduled resource exceeding a threshold, resource +.>Not usable. Alternatively, the UE may alsoDetermining resources by comparing the S-RSSI based on the measurement before the subframe y with a specific threshold Whether it is available. For example, for P rsvp_TX ＝k×P step K=1, 1/2,1/5,S-RSSI is on the resourcej=0, 1, … 1; p pair P rsvp_TX ＝k×P step ，k>1, S-RSSI is on the resourcej=0, 1, …, average of the S-RRSI measured. The specific threshold is defined by a standard, configured or preconfigured by the eNB. Wherein P is rsvp_TX A period is reserved for the current resources of the UE, which value is indicated by the eNB.
In order to support the above operation, the UE should continue to perform channel detection on all resources of each subframe in the currently selected transmission resource pool or start to perform channel detection when the UE data generation period is changed and report the channel detection result to the eNB. Preferably, if the subframe n meets at least one of the following conditions, the UE reports the channel detection result to the eNB in the subframe n:
condition one: the UE meets the condition of bypass Buffer Status Report (BSR) in the subframe n, and the service corresponding to the bypass BSR is V2X service to be sent in the current resource pool by the UE.
Condition II: the subframe n satisfies the reporting configuration of the channel detection result indicated by the eNB, i.e., (n-delta) mod p=0, where delta is the reporting subframe offset of the channel detection result indicated by the eNB, P is the reporting period of the channel detection result, and the UE determines the value of P according to the eNB indication, the pre-configuration or standard definition.
And (3) a third condition: and after the subframe n is the subframe x, the subframe x is the subframe in which the uplink scheduling resource exists for the first time, wherein the subframe x is the subframe in which the UE receives the report indication of the channel detection result of the eNB for the last time. The channel detection result reporting indication of the eNB can be RRC layer signaling, MAC layer signaling or physical layer signaling.
Preferably, the channel detection result reported by the UE should include channel conditions on some or all of the subchannels in the subframe range [ n+a, n+b ], where, for any reported subchannel, the channel conditions include at least one of the following information: average S-RSSI on a sub-channel, PSSCH-RSRP on the sub-channel, priority of PSSCH transmitted by UE reserving the sub-channel, resource reservation period of the UE reserving the sub-channel, and the like. For example, if the UE reports that the channel detection result is triggered by the condition one, the values of a and b are determined by the UE implementation, and the value satisfying b should satisfy the delay requirement of the current service of the UE; if the UE reports that the channel detection result is triggered by the condition two or the condition three, a=1 and b=100. Because the subframe of the DCI 5A and the subframe where the PSCCH and psch resources indicated by the DCI 5A are transmitted by the eNB should be at least 4ms apart, preferably, if the UE reports the channel detection result triggered by the second or third condition, in order to provide the eNB with the timely channel detection result, the period P of the UE reporting the channel detection result should be less than b, for example, if b is 100 and the channel detection result is fed back by the physical layer signaling, the value of P should be not greater than 96; if b is 100 and the channel detection result is fed back by higher layer signaling, the value of P should not be greater than X, where X is less than 96, e.g., x=95 or 94.
Preferably, when the UE reports the channel detection result, the UE shall further report the Global Positioning System (GPS) coordinates of the current location.
If the channel detection mode is the implementation mode one, the UE is not found to occupy the single subframe resource in the detection of I1 timesj=1, 2,3, … I1, then the UE will have the monocot resource +.>k=1, 2, …, and performs data transmission as a transmission resource.
If the channel detection mode is the implementation mode II, the UE is not found to occupy the single subframe resource in the I2 detectionj=1, 2,3, … I2, then the UE will have the monocot resource +.>k=1, 2, …, and performs data transmission as a transmission resource.
If the channel detection mode is implementation three, and the single subframe resource R x,y+j×Pm None of which is occupied by other UEs, j=1, 2,3, … I3, then the UE determines a single subframe resource R x,y+I3×Pm+k×Pm K=1, 2, …, and performs data transmission as a transmission resource.
If the channel detection mode is implementation four, and the single subframe resource R x,y If not occupied by other UE, the UE selects a single subframe resourcej=1, 2,3, …, and performs data transmission as a transmission resource.
If the channel detection mode is implementation five, and the single subframe resourcej=0, 1,2, …, not occupied by other UEs, then the UE chooses to select the monocot frame resource +.>And data transmission is carried out as a sending resource.
If the channel detection mode is implementation six, and the single subframe resource R x,y If not occupied by other UE, the UE selects a single subframe resourcej=1, 2,3, …, and performs data transmission as a transmission resource.
And the UE transmits PSCCH on the PSCCH resource corresponding to the selected single-subframe resource, and transmits PSSCH on the selected single-subframe resource.
Case five
In the fifth case, the UE works in Mode 3, and under specific conditions, the UE reports the channel detection result of the current resource pool to the eNB to assist the eNB in resource allocation. The UE operating in mode 3 performs a receiving operation on the resource pool, e.g., receives V2X information and measures CBR for other UEs, so the UE can observe traffic distribution on the resource pool so that the UE can know that those resources in the resource pool are busy and those resources are idle. Thus, the UE of mode 3 may report information about the resource pool traffic distribution to the base station, thereby assisting the base station in scheduling data transmissions for the mode 3UE on the more idle resources, thereby reducing the impact on the mode 4 users. For example, the resource pool traffic distribution information may be a period and a subframe offset indicating the free resources. The invention is not limited to a specific method of indicating information of the resource pool traffic distribution. After receiving the bypass resource allocation indication (i.e., DCI 5A) sent by the eNB, the UE directly sends PSCCH and PSSCH on the resources indicated by DCI 5A, or determines the sending resources according to the method described in case four.
Preferably, a method for the UE to report the detection result to assist the base station in allocating the resources of mode 3 is described below. The method comprises the following steps:
the first step, if the subframe n meets at least one of the following conditions, the UE reports the channel detection result to the eNB in the subframe n:
condition one: the UE meets the condition of bypass Buffer Status Report (BSR) in the subframe n, and the service corresponding to the bypass BSR is V2X service to be sent in the current resource pool by the UE.
Condition II: the subframe n satisfies the reporting configuration of the channel detection result indicated by the eNB, i.e., (n-delta) mod p=0, where delta is the reporting subframe offset of the channel detection result indicated by the eNB, P is the reporting period of the channel detection result, and the UE determines the value of P according to the eNB indication, the pre-configuration or standard definition.
And (3) a third condition: and after the subframe n is the subframe x, the subframe x is the subframe in which the uplink scheduling resource exists for the first time, wherein the subframe x is the subframe in which the UE receives the report indication of the channel detection result of the eNB for the last time. The channel detection result reporting indication of the eNB can be RRC layer signaling, MAC layer signaling or physical layer signaling.
Preferably, the channel detection result reported by the UE should include channel conditions on some or all of the subchannels in the subframe range [ n+a, n+b ], where, for any reported subchannel, the channel conditions include at least one of the following information: average S-RSSI on a sub-channel, PSSCH-RSRP on the sub-channel, priority of PSSCH transmitted by UE reserving the sub-channel, resource reservation period of the UE reserving the sub-channel, and the like. For example, if the UE reports that the channel detection result is triggered by the condition one, the values of a and b are determined by the UE implementation, and the value satisfying b should satisfy the delay requirement of the current service of the UE; if the UE reports that the channel detection result is triggered by the condition two or the condition three, a=1 and b=100. Because the subframe of the DCI 5A and the subframe where the PSCCH and psch resources indicated by the DCI 5A are transmitted by the eNB should be at least 4ms apart, preferably, if the UE reports the channel detection result triggered by the second or third condition, in order to provide the eNB with the timely channel detection result, the period P of the UE reporting the channel detection result should be less than b, for example, if b is 100 and the channel detection result is fed back by the physical layer signaling, the value of P should be not greater than 96; if b is 100 and the channel detection result is fed back by higher layer signaling, the value of P should not be greater than X, where X is less than 96, e.g., x=95 or 94.
Preferably, when the UE reports the channel detection result, the UE shall further report the Global Positioning System (GPS) coordinates of the current location.
In the second step, after receiving the bypass resource allocation instruction (i.e., DCI 5A) sent by the eNB, the UE sends PSCCH and PSSCH on the resources indicated by DCI 5A or on the transmission resources determined according to the method in case four.
Through the method, the working and Mode 3UE determines the resource occupation and the resource reservation condition in the current resource pool through channel detection, and after the UE reports the detection result to the eNB, the eNB can schedule the resource with relatively higher channel quality to the data transmission of the Mode 3UE, so that the interaction between the Mode 3 and Mode 4 users is reduced.
Fig. 2 is a block diagram of a User Equipment (UE) performing a resource selection or reselection method in vehicle-to-outside V2X communication according to an embodiment of the present invention. Referring to fig. 2, the apparatus includes: a detection module 21, a resource selection or reselection module 22 and a transmission module 23.
The detection module is used for detecting PSCCH sent by other UE. The detection module may detect SCI X on all PSCCH resources in the currently selected transmission resource pool of the UE or only on a part of the PSCCH resources of the currently selected transmission resource pool of the UE, e.g. by receiving signalling from the eNB to determine the location of the part of the PSCCH resources.
A resource selection or reselection module configured to select a monocot resource from the monocot resources that do not overlap the detected PSCCH reserved monocot resource.
According to one embodiment of the invention, if the detected SCI X is in a particular format, a single subframe resource is selected among the single subframe resources that do not overlap with the single subframe resources reserved for the detected PSCCH.
According to another embodiment of the present invention, if the detected SCI X is in a specific PSCCH format, and the Priority field (Priority) value prio contained in SCI X RX Above a certain value, a single subframe resource is selected from the single subframe resources that do not overlap with the single subframe resources reserved for the detected PSCCH.
For example, the specific PSCCH format is SCI 1 defined in 3GPP release 14, or a PSCCH format different from SCI 1 defined in 3GPP release 14, or the same number of bits as SCI 1 defined in 3GPP release 14, and the meaning of each field is the same, but one or more bits in the reserved bit field is 1.
According to yet another embodiment of the present invention, the resource selection or reselection module further measures a bypass reference signal received power (PSSCH-RSRP) of the PSSCH scheduled by SCI X, and selects a sub-frame resource among sub-frame resources that do not overlap with the sub-frame resources reserved for the detected PSCCH if the PSSCH-RSRP is above a certain threshold.
The transmitting module transmits the physical bypass shared channel PSSCH on the selected subframe resource.
Those skilled in the art will appreciate that the present application includes apparatuses related to performing one or more of the operations described herein. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random Access Memory, random access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims (24)

1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving configuration information about a bypass resource pool from a base station;
performing channel detection on the bypass resource pool based on parameters associated with the channel detection; and
reporting the result of the channel detection to the base station,
wherein the parameter associated with channel detection includes at least one of a resource reservation period and a priority of a physical bypass shared channel, PSSCH.
2. The method of claim 1, wherein reporting the result of the channel detection to the base station comprises:
in case the result of the channel detection is available, reporting the result of the channel detection to the base station based on configuration information associated with the reporting of the result of the channel detection,
wherein the configuration information associated with reporting of the result of the channel detection includes a reporting period of the result of the channel detection.
3. The method of claim 1 or 2, further comprising:
Configuration information associated with reporting of the result of channel detection is received from the base station.
4. The method of claim 1, wherein the terminal is configured to bypass transmission mode 3.
5. The method of claim 1, wherein the parameters associated with channel detection are configured by a base station.
6. The method of claim 1, wherein reporting the result of the channel detection to the base station comprises: further comprises:
periodically reporting the channel detection result to the base station;
wherein, the period of reporting the result of channel detection is configured by the base station.
7. A terminal in a wireless communication system, comprising:
a transceiver; and
at least one processor configured to:
configuration information about the bypass resource pool is received from the base station,
performing channel detection on the bypass resource pool based on parameters associated with the channel detection, and
reporting the result of the channel detection to the base station,
wherein the parameter associated with channel detection includes at least one of a resource reservation period and a priority of a physical bypass shared channel, PSSCH.
8. The terminal of claim 7, wherein the at least one processor is further configured to:
in case the result of the channel detection is available, reporting the result of the channel detection to the base station based on configuration information associated with the reporting of the result of the channel detection,
Wherein the configuration information associated with reporting of the result of the channel detection includes a reporting period of the result of the channel detection.
9. The terminal of claim 7 or 8, wherein the at least one processor is further configured to:
configuration information associated with reporting of the result of channel detection is received from the base station.
10. The terminal of claim 7, wherein the terminal is configured to bypass transmission mode 3.
11. The terminal of claim 7, wherein the parameter associated with channel detection is configured by a base station.
12. The terminal of claim 7, wherein the at least one processor is further configured to:
periodically reporting the result of channel detection to the base station,
wherein, the period of reporting the result of channel detection is configured by the base station.
13. A method performed by a base station in a wireless communication system, the method comprising:
transmitting configuration information about the bypass resource pool to the terminal; and
a result of performing channel detection on the bypass resource pool is received from the terminal,
wherein channel detection is performed based on parameters associated with the channel detection, and
wherein the parameter associated with channel detection includes at least one of a resource reservation period and a priority of a physical bypass shared channel, PSSCH.
14. The method of claim 13, wherein receiving, from the terminal, a result of performing channel detection on the bypass resource pool comprises:
receiving a result of channel detection reported based on configuration information associated with reporting of the result of channel detection in a case where the result of channel detection is available,
wherein the configuration information associated with reporting of the result of the channel detection includes a reporting period of the result of the channel detection.
15. The method of claim 13 or 14, further comprising:
and sending configuration information associated with reporting of the channel detection result to the terminal.
16. The method of claim 13, wherein the terminal is configured to bypass transmission mode 3.
17. The method of claim 13, wherein the method further comprises: the terminal is configured with parameters associated with channel detection.
18. The method of claim 13, wherein receiving, from the terminal, a result of performing channel detection on the bypass resource pool comprises:
periodically receiving a result of performing channel detection on the bypass resource pool from the terminal,
wherein the method further comprises: and configuring a period for reporting the channel detection result for the terminal.
19. A base station in a wireless communication system, comprising:
A transceiver; and
at least one processor configured to:
transmitting configuration information about the bypass resource pool to the terminal, and
a result of performing channel detection on the bypass resource pool is received from the terminal,
wherein channel detection is performed based on parameters associated with the channel detection, and
wherein the parameter associated with channel detection includes at least one of a resource reservation period and a priority of a physical bypass shared channel, PSSCH.
20. The base station of claim 19, wherein the at least one processor is further configured to:
receiving a result of channel detection reported based on configuration information associated with reporting of the result of channel detection in a case where the result of channel detection is available,
wherein the configuration information associated with reporting of the result of the channel detection includes a reporting period of the result of the channel detection.
21. The base station of claim 19 or 20, wherein the at least one processor is further configured to:
and sending configuration information associated with reporting of the channel detection result to the terminal.
22. The base station of claim 19, wherein the terminal is configured to bypass transmission mode 3.
23. The base station of claim 19, wherein the at least one processor is further configured to: the terminal is configured with parameters associated with channel detection.
24. The base station of claim 19, wherein the at least one processor is further configured to:
configuring the period of reporting the result of channel detection for the terminal, and
the result of performing channel detection on the bypass resource pool is periodically received from the terminal.
CN201810036887.8A 2017-03-24 2018-01-15 Resource selection or reselection method in vehicle-to-outside communication and user equipment Active CN108632781B (en)

Priority Applications (4)

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EP18772610.4A EP3574694A4 (en) 2017-03-24 2018-03-23 Resource selection method in vehicle to everything communication and apparatus therefore
US16/490,408 US11102631B2 (en) 2017-03-24 2018-03-23 Resource selection method in vehicle to everything communication and apparatus therefore
PCT/KR2018/003478 WO2018174661A1 (en) 2017-03-24 2018-03-23 Resource selection method in vehicle to everything communication and apparatus therefore
US17/444,458 US11659371B2 (en) 2017-03-24 2021-08-04 Resource selection method in vehicle to everything communication and apparatus therefore

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