CN108616339A - A kind of determination method of SC-PTM feedback resources in V2X communication systems - Google Patents

A kind of determination method of SC-PTM feedback resources in V2X communication systems Download PDF

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Publication number
CN108616339A
CN108616339A CN201611138029.1A CN201611138029A CN108616339A CN 108616339 A CN108616339 A CN 108616339A CN 201611138029 A CN201611138029 A CN 201611138029A CN 108616339 A CN108616339 A CN 108616339A
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pucch
terminal
resource
control channel
formula
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CN108616339B (en
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赵丰
池连刚
郑辰
冯绍鹏
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Putian Information Technology Co Ltd
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Putian Information Technology Co Ltd
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    • 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
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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

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

Abstract

This application discloses the determination methods of a kind of single cell point to multiple spot (SC PTM) feedback resources, applied to vehicle to extraneous (V2X) communication system, this method is under wireless heterogeneous networks (RRC) connected state, when terminal only feeds back hybrid automatic repeat-request (HARQ) information, rrc layer configures resource offset parameter Δ for each terminalPUCCH；Then, for different dual-modes, pass through the index and Δ of first control channel unit (CCE) that Physical Downlink Control Channel (PDCCH) distributesPUCCHCalculate Physical Uplink Control Channel (PUCCH) resource location of each terminal.Using technical solution disclosed in the present application, eNB can be made to obtain the HARQ feedback information of required each terminal.

Description

A kind of determination method of SC-PTM feedback resources in V2X communication systems
Technical field
This application involves mobile communication technology field, more particularly to SC-PTM feedback resources in a kind of V2X communication systems Determine method.
Background technology
As the improvement of people's living standards, the automobile volume of holding increases sharply.It is ever-increasing on the roads such as city, high speed Vehicle makes traffic accident be continuously increased, thus the relevant safety problem of road traffic become influence the social people's livelihood basic problem it One.People, vehicle, road and internet are organically combined, are significantly reduced by the direct communication between vehicle by car networking technology Traffic accident.
In vehicle in extraneous (V2X) communication, can be transmitted by broadcast mechanism based on Uu mouthfuls of downlink informations, in this way It can ensure multiple UE while receive the information.Supported in down channel at present broadcast mechanism there are two types of channel：One is MBSFN (multicasts/multicast single-frequency network network：Multicast-Broadcast Single Frequency Network), it is another It is SC-PTM (single cell points to multiple spot：Single Cell Point-To-Multipoint).In V2X communication systems, to passing The reliability and delay requirement of defeated information are higher, have the characteristics that highly reliable, low time delay, SC-PTM channels are not fed back accordingly Mechanism, each information is only sent once, therefore reliability does not reach requirement, and addition feedback mechanism is needed to be retransmitted accordingly, The performance of channel could be promoted further.
In 3GPP meetings, the companies such as Huawei analyze is added feedback mechanism in SC-PTM channels, can further carry The spectrum efficiency of high system, it was demonstrated that the necessity of feedback mechanism is added, but the details that SC-PTM channel feedbacks are related to asks Topic is not yet further discussed.
Invention content
This application provides a kind of determination methods of SC-PTM feedback resources in V2X communication systems, and eNB is enable to obtain institute The HARQ feedback information of each terminal needed.
This application provides a kind of single cell points to the determination method of multiple spot SC-PTM feedback resources, are applied to vehicle to the external world V2X communication systems, including：
A, under radio resource control RRC connected state, when terminal only feeds back hybrid automatic repeat-request HARQ information, Rrc layer configures resource offset parameter Δ for each terminalPUCCH；
B, for different dual-modes, the first control channel list distributed by physical downlink control channel PDCCH The index and Δ of first CCEPUCCHCalculate the Physical Uplink Control Channel PUCCH resource position of each terminal.
Preferably, the ΔPUCCHIt is calculated according to the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of each terminal.
Preferably, calculating Δ according to formula (9)PUCCH：
Wherein, c is orthogonal sequence number；
For the subcarrier number in each resource block RB；
For cyclic shift interval；
nRNTIFor the C-RNTI values of the terminal；
Computational methods are：First, it takes n to be equal to 0, calculates the Δ of the terminalPUCCHValue, if the value and other terminals ΔPUCCHIt differs, it is determined that the value is the Δ of the terminalPUCCHValue；If the Δ of the value and other terminalsPUCCHIt is identical, then take n =n+1, then calculate the resource offset parameter Δ of the terminalPUCCH, and judge the Δ of the value and other terminalsPUCCHWhether differ, Until determining the Δ of one and other-endPUCCHΔ of the different value as the terminalPUCCHValue.
Preferably, the B includes：
For Frequency Division Duplex FDD pattern, as the PDSCH or downlink of the PDCCH channel dispatch subframes n by subframe n-4 When semi-continuous scheduling SPS releases, the PUCCH resource position of each terminal is calculated by formula (3)：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
Preferably, the B includes：
For fdd mode, as the PDSCH of the enhancing Physical Downlink Control Channel EPDCCH scheduling subframes n by subframe n-4 Or when downlink SPS releases：
If enhancing control channel Physical Resource Block group EPDCCH-PRB-set q are configured to distributed transmission, by formula (4) the PUCCH resource position of each terminal is calculated：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource of each terminal is calculated by formula (5) Position：
Wherein, nECCE,qTo transmit first enhancing control letter of Downlink Control Information DCI in EPDCCH-PRB-set q The position of road unit ECCE；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB centerings ECCE；
N ' is determined by antenna port.
Preferably, the B includes：
For tdd mode, the PDSCH as the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases When, the PUCCH resource position of each terminal is calculated by formula (6)：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
Preferably, the B includes：
For tdd mode, the PDSCH as the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases When：
If EPDCCH-PRB-set q are configured to distributed transmission, the PUCCH resource of each terminal is calculated by formula (7) Position：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource of each terminal is calculated by formula (8) Position：
Wherein, nECCE,qFor the position of first ECCE of transmission DCI in EPDCCH-PRB-set q；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB centerings ECCE；
N ' is determined by antenna port.
As seen from the above technical solution, in V2X communication systems provided by the present application SC-PTM feedback resources determination method, Under RRC connected states, when terminal only feeds back HARQ information, resource offset parameter is configured for each terminal by rrc layer ΔPUCCH；Then, for different dual-modes, pass through the index and Δ of first CCE of PDCCH distributionPUCCHIt calculates each The PUCCH resource position of terminal, so as to make eNB obtain the HARQ feedback information of required each terminal.
Description of the drawings
Fig. 1 is the schematic diagram of the determination method of SC-PTM feedback resources in V2X communication systems of the present invention.
Specific implementation mode
To make the object, technical solution and advantage of the application be more clearly understood, develop simultaneously embodiment referring to the drawings, right The application is described in further detail.
Existing SC-PTM channels do not have HARQ (hybrid automatic repeat-requests：Hybrid Automatic Repeat ReQuest) feedback mechanism, and in V2X communication systems, it is higher to the reliability requirement of channel, it is therefore desirable in the channel Feedback mechanism is added to improve the reliability of channel.The characteristics of SC-PTM channels is point-to-multipoint, in RRC Connected (nothings Line resources control connect) state when, if fully according to original mechanism, when only ACK/NACK is fed back, PUCCH need to be used Format 1a channels are fed back, and the channel resource of PUCCH (Physical Uplink Control Channel) is identical, FDD (frequency division duplex) When pattern as shown in formula (1)：
When TDD (time division duplex) pattern as shown in formula (2)：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor corresponding first CCE of PDCCH (Physical Downlink Control Channel) of PDSCH (Physical Downlink Shared Channel) (controls Channel Elements processed) position；
For the cell-level parameter of high level configuration；
M is related with uplink and downlink proportioning；
NcIt is related with the positions PDCCH with m.
Either fdd mode or tdd mode are can be seen that from formula (1) and formula (2), it is corresponding to receive the SC-PTM information All users, nCCE、M、m、NcAnd Nc+1It is identical, so PUCCH resourceBe it is identical, eNB without Method distinguishes the PUCCH signals of each terminal feedback.3GPP tissues are not yet further discussed the feedback mechanism of SC-PTM channels.
The present invention is when RRC connected states only feed back HARQ information (using PUCCH format 1a), in conjunction with existing HARQ Feedback processing mechanism, it is proposed that a kind of method of the PUCCH resource of all terminals of eNB differentiations reception SC-PTM broadcast channels, The rope for first control channel unit (CCE) that the PUCCH resource position of each user is distributed by Physical Downlink Control Channel The implicit determination of resource offset drawn and be calculated by C-RNTI (Cell Radio Network Temporary Identifier/Identity, Cell-RNTI), enables eNB to obtain The HARQ feedback information of required each terminal.
In V2X systems, after feedback mechanism is added in SC-PTM channels, HARQ ACK/NACK are only transmitted on PUCCH channels When information, implementation of the invention is as shown in Figure 1：
1st step：Under RRC connected states, when only HARQ information is fed back, rrc layer is for each terminal configuration money Source offset parameter, ΔPUCCH。
2nd step：For different dual-modes, the index of first CCE distributed by Physical Downlink Control Channel and ΔPUCCHCalculate the PUCCH resource position of each terminal.
For fdd mode, when the PDSCH or downlink SPS of the PDCCH channel dispatch subframes n by subframe n-4 (are partly held Continuous scheduling) release when, by the PUCCH resource position of each terminal of formula (3) calculating：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
For fdd mode, the PDSCH as the EPDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases When：
If EPDCCH-PRB-set (enhancing control channel Physical Resource Block group) q is configured to distributed transmission, by formula (4) the PUCCH resource position of each terminal is calculated：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource of each terminal is calculated by formula (5) Position：
Wherein, nECCE,qFirst ECCE to transmit DCI (Downlink Control Information) in EPDCCH-PRB-set q (increases Strong control channel unit) position；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB (resource block) centerings ECCE；
N ' is determined by antenna port.
For tdd mode, the PDSCH as the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases When, the PUCCH resource position of each terminal is calculated by formula (6)：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
For tdd mode, the PDSCH as the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases When：
If EPDCCH-PRB-set q are configured to distributed transmission, the PUCCH resource of each terminal is calculated by formula (7) Position：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource of each terminal is calculated by formula (8) Position：
Wherein, nECCE,qFor the position of first ECCE of transmission DCI in EPDCCH-PRB-set q；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB centerings ECCE；
N ' is determined by antenna port.
In above formula (3)-formula (8), resource offset parameter ΔPUCCHIt is calculated, is counted according to the C-RNTI of each terminal Shown in calculation method such as formula (9)：
First, it takes n to be equal to 0, calculates the Δ of the terminalPUCCHValue, if the Δ of the value and other terminalsPUCCHIt differs, Then determine that the value is the Δ of the terminalPUCCHValue；If the Δ of the value and other terminalsPUCCHIt is identical, then n=n+1 is taken, then calculate The resource offset parameter Δ of the terminalPUCCH, and judge the Δ of the value and other terminalsPUCCHWhether differ, until determining one With the Δ of other-endPUCCHΔ of the different value as the terminalPUCCHValue.
In formula (9), c is orthogonal sequence number；
For the subcarrier number in each RB；
For cyclic shift interval；
nRNTIFor the C-RNTI values of the terminal.
The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.

Claims (7)

1. a kind of single cell point to the determination method of multiple spot SC-PTM feedback resources, is applied to vehicle to extraneous V2X communication systems, It is characterized in that, including：
A, under radio resource control RRC connected state, when terminal only feeds back hybrid automatic repeat-request HARQ information, rrc layer Resource offset parameter Δ is configured for each terminalPUCCH；
B, for different dual-modes, the first control channel unit CCE distributed by physical downlink control channel PDCCH Index and ΔPUCCHCalculate the Physical Uplink Control Channel PUCCH resource position of each terminal.
2. according to the method described in claim 1, it is characterized in that：
The ΔPUCCHIt is calculated according to the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of each terminal.
3. according to the method described in claim 2, it is characterized in that, calculating Δ according to formula (9)PUCCH：
Wherein, c is orthogonal sequence number；
For the subcarrier number in each resource block RB；
For cyclic shift interval；
nRNTIFor the C-RNTI values of the terminal；
Computational methods are：First, it takes n to be equal to 0, calculates the Δ of the terminalPUCCHValue, if the Δ of the value and other terminalsPUCCH It differs, it is determined that the value is the Δ of the terminalPUCCHValue；If the Δ of the value and other terminalsPUCCHIt is identical, then n=n+1 is taken, The resource offset parameter Δ of the terminal is calculated againPUCCH, and judge the Δ of the value and other terminalsPUCCHWhether differ, until really Determine the Δ of one and other-endPUCCHΔ of the different value as the terminalPUCCHValue.
4. method according to any one of claims 1 to 3, which is characterized in that the B includes：
For Frequency Division Duplex FDD pattern, when the PDSCH or downlink of the PDCCH channel dispatch subframes n by subframe n-4 are partly held When continuous scheduling SPS releases, the PUCCH resource position of each terminal is calculated by formula (3)：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
5. method according to any one of claims 1 to 3, which is characterized in that the B includes：
For fdd mode, when the enhancing Physical Downlink Control Channel EPDCCH scheduling subframes n by subframe n-4 PDSCH or When downlink SPS releases：
If enhancing control channel Physical Resource Block group EPDCCH-PRB-set q are configured to distributed transmission, based on formula (4) Calculate the PUCCH resource position of each terminal：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource position of each terminal is calculated by formula (5) It sets：
Wherein, nECCE,qTo transmit first enhancing control channel list of Downlink Control Information DCI in EPDCCH-PRB-set q The position of first ECCE；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB centerings ECCE；
N ' is determined by antenna port.
6. method according to any one of claims 1 to 3, which is characterized in that the B includes：
Tdd mode is pressed as the PDSCH of the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases Formula (6) calculates the PUCCH resource position of each terminal：
Wherein,For antenna port p0PUCCH resource location；
nCCEFor the position of corresponding first CCE of PDCCH of the PDSCH；
For the cell-level parameter of high level configuration.
7. method according to any one of claims 1 to 3, which is characterized in that the B includes：
For tdd mode, as the PDSCH of the PDCCH channel dispatch subframes n by subframe n-4 or downlink SPS releases：
If EPDCCH-PRB-set q are configured to distributed transmission, the PUCCH resource position of each terminal is calculated by formula (7) It sets：
If EPDCCH-PRB-set q are configured to localized transmission, the PUCCH resource position of each terminal is calculated by formula (8) It sets：
Wherein, nECCE,qFor the position of first ECCE of transmission DCI in EPDCCH-PRB-set q；
ΔAROFor the HARQ-ACK resource deviants in DCI format；
Parameter is configured for high level；
For the number of each RB centerings ECCE；
N ' is determined by antenna port.
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CN110169093A (en) * 2019-04-09 2019-08-23 北京小米移动软件有限公司 The retransmission feedback method, apparatus and storage medium of direct-connected communication
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CN111130723A (en) * 2018-10-31 2020-05-08 展讯通信（上海）有限公司 Method and device for realizing flexible feedback in V2X transmission and user equipment
WO2020133505A1 (en) * 2018-12-29 2020-07-02 北京小米移动软件有限公司 Data transmission method, apparatus, and system for direct communication, and device
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CN111800872A (en) * 2019-04-05 2020-10-20 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
CN111867099A (en) * 2019-04-30 2020-10-30 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
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WO2020088648A1 (en) * 2018-11-02 2020-05-07 Mediatek Singapore Pte. Ltd. Configuration and selection of harq feedback resources in a wireless communication system
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CN109792326A (en) * 2018-12-29 2019-05-21 北京小米移动软件有限公司 Data transmission method, device, equipment and the system of direct-connected communication
CN111756495A (en) * 2019-03-28 2020-10-09 华为技术有限公司 HARQ feedback control method and related equipment
WO2020192778A1 (en) * 2019-03-28 2020-10-01 华为技术有限公司 Hybrid automatic repeat request (harq) feedback control method and related device
CN111800872A (en) * 2019-04-05 2020-10-20 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
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CN110169093A (en) * 2019-04-09 2019-08-23 北京小米移动软件有限公司 The retransmission feedback method, apparatus and storage medium of direct-connected communication
CN110169093B (en) * 2019-04-09 2022-11-22 北京小米移动软件有限公司 Retransmission feedback method and device for direct connection communication and storage medium
CN113785518A (en) * 2019-04-29 2021-12-10 Lg电子株式会社 Method and apparatus for determining HARQ feedback option in NR V2X
CN113785518B (en) * 2019-04-29 2024-01-02 Lg电子株式会社 Method and device for determining HARQ feedback options in NR V2X
CN111867099B (en) * 2019-04-30 2024-04-05 株式会社Kt Method and device for transmitting and receiving HARQ feedback information of side chain
CN111867099A (en) * 2019-04-30 2020-10-30 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
CN112351492A (en) * 2019-08-06 2021-02-09 中国移动通信有限公司研究院 Resource indication method, resource determination method, device, network side equipment and terminal
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