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YD/T 3340-2018 English PDF (YDT3340-2018)

YD/T 3340-2018 English PDF (YDT3340-2018)

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YD/T 3340-2018: Technical requirements of air interface of LTE-based vehicular communication

This standard specifies the air interface technical requirements for the LTEbased vehicular communication technology, including the PC5 interface technical requirements for the sidelink communication mode between terminals, as well as the Uu interface technical requirements for the uplink/downlink communication mode between the terminal and the base station. It specifies the physical layer, MAC layer, RLC layer, PDCP layer, RRC layer as well as the UE process in idle mode under these two working modes.
YD/T 3340-2018
YD
COMMUNICATION INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 33.060.99
M36
Technical requirements of air interface of LTE-based
vehicular communication
ISSUED ON: DECEMBER 21, 2018
IMPLEMENTED ON: APRIL 01, 2019
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Abbreviations ... 6
4 Overview ... 9
5 PC5 interface technical requirements ... 11
5.1 Physical layer ... 11
5.2 MAC layer... 52
5.3 RLC layer ... 69
5.4 PDCP layer ... 70
5.5 RRC layer ... 72
5.6 UE process in idle mode ... 178
6 Uu interface's technical requirements ... 180
6.1 Physical layer ... 180
6.2 MAC layer... 184
6.3 RLC layer ... 185
6.4 PDCP layer ... 185
6.5 RRC layer ... 185
6.6 UE process in idle mode ... 200
Technical requirements of air interface of LTE-based
vehicular communication
1 Scope
This standard specifies the air interface technical requirements for the LTE- based vehicular communication technology, including the PC5 interface
technical requirements for the sidelink communication mode between terminals, as well as the Uu interface technical requirements for the uplink/downlink communication mode between the terminal and the base station. It specifies the physical layer, MAC layer, RLC layer, PDCP layer, RRC layer as well as the UE process in idle mode under these two working modes.
This standard applies to LTE-based vehicular communication systems,
including V2V, V2I, V2P, V2N communication scenarios.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.
YD/T 3340-2018 Technical requirements of air interface of LTE-based
vehicular communication
3GPP TS 23.285 (Release 14) Technical Specification Group Services and
System Aspects; Architecture enhancements for V 2X services
3GPP TS 24.334 (Release 14) Proximity-services (ProSe) User Equipment
(UE) to ProSe function protocol aspects; Stage 3
3GPP TS 24.386 (Release 14) User Equipment (UE) to V2X control function; protocol aspects; Stage 3
3GPP TS 36.101 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); User Equipment (UE) radio transmission and reception
3GPP TS 36.133 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Requirements for support of radio management
3GPP TS 36.211 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Physical channels and modulation
3GPP TS 36.212 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Multiplexing and channel coding
3GPP TS 36.213 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Physical layer procedures
3GPP TS 36.214 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Physical layer - Measurements
3GPP TS 36.304 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); User Equipment (UE) procedures in idle mode
3GPP TS 36.321 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Medium Access Control (MAC) protocol specification
3GPP TS 36.322 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Radio Link Control (RLC) protocol specification
3GPP TS 36.323 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Packet Data Convergence Protocol (PDCP) Specification
3GPP TS 36.331 (Release 14) Evolved Universal Terrestrial Radio Access
(E-UTRA); Radio Resource Control (RRC) Protocol specification
3 Abbreviations
The following abbreviations apply to this document.
3GPP: The 3rd Generation Partnership Project
AM: Acknowledged Mode
BSR: Buffer Status Report
CBR: Channel Busy Ratio
CR: Channel Occupancy Ratio
CRC: Cyclic Redundancy Check
CSI: Channel Status Indicator
DCI: Downlink Control Information
DL: Downlink
PRACH: Physical Random Access Channel
PRB: Physical Resource Block
PSBCH: Physical Sidelink Broadcast Channel
PSCCH: Physical Sidelink Control Channel
PSSCH: Physical Sidelink Shared Channel
PSSS: Primary Sidelink Synchronization Signal
PUCCH: Physical Uplink Control Channel
PUSCH: Physical Uplink Shared Channel
QAM: Quadrature Amplitude Modulation
QPSK: Quadrature Phase Shift Keying
RB: Resource Block
RIV: Resource Indication Value
RLC: Radio Link Control
RNTI: Radio Network Temporary Identifier
RRC: Radio Resource Control
RSRP: Reference Signal Received Power
SBCCH: Sidelink Broadcast Control Channel
SCell: Secondary Cell
SCI: Sidelink Control Information
SC-FDMA: Single Carrier Frequency Division Multiplex Access
SDU: Service Data Unit
SFN: System Frame Number
SIB: System Information Block
SL: Sidelink
SL-BCH: Sidelink Broadcast Channel
SL-SCH: Sidelink Share Channel
interface; the other is the uplink/downlink communication mode between the terminal and the base station, where the air interface between the terminal and the base station is called Uu interface.
Chapter 5 specifies the technical requirements for the PC5 interface of the LTE- based wireless communication technology for vehicular networking. The
sidelink's communication method includes two transmission modes. Among
them, the sidelink transmission mode 3 is resource scheduling allocation, whilst the sidelink transmission mode 4 is the UE's independent resource selection. For specific definitions, see 7.2.2 of YD/T 3340-2018 Technical requirements of air interface of LTE-based vehicular communication.
The correspondence between the document structure and content of Chapter 5 and the 3GPP technical specifications is as follows.
- 5.1 specifies the technical requirements for the physical layer.
- 5.1.1 specifies the physical channel and modulation, corresponding to 3GPP TS 36.211 (Release 14).
- 5.1.2 specifies multiplexing and channel coding, corresponding to 3GPP TS 36.212 (Release 14).
- 5.1.3 specifies the physical layer process, corresponding to 3GPP TS
36.213 (Release 14).
- 5.1.4 specifies physical layer measurement, corresponding to 3GPP TS
36.214 (Release 14).
- 5.2 specifies the technical requirements for the Medium Access Control (MAC) layer, corresponding to 3GPP TS 36.321 (Release 14).
- 5.3 specifies the technical requirements for the Radio Link Control (RLC) layer, corresponding to 3GPP TS 36.322 (Release 14).
- 5.4 specifies the technical requirements of the Packet Data Convergence Protocol (PDCP) layer, corresponding to 3GPP TS 36.323 (Release 14).
- 5.5 specifies the technical requirements for the Radio Resource Control (RRC) layer, corresponding to 3GPP TS 36.331 (Release 14).
- 5.6 specifies the UE process technical requirements in idle mode,
corresponding to 3GPP TS 36.304 (Release 14).
Chapter 6 specifies the technical requirements for the Uu interface of the LTE- based wireless communication technology for the vehicular networking.
The correspondence between the document structure and content of Chapter 5.1.1.2.5 Resource pool
The 5.1.3 defines the subframe pool and resource block pool.
For PSSCH, the current time slot number in the subframe pool is
, where is the current time slot number in the
current sidelink subframe , where k is equal to the footnote of
; is defined by the sidelink transmission mode 3 in 5.1.3.2.1.2, or defined by the sidelink transmission mode 4 in 5.1.3.2.1.3.
5.1.1.2.6 Guard interval
The last SC-FDMA symbol of the sidelink subframe is used as a guard interval and cannot be used for sidelink transmission.
5.1.1.3 Physical shared channel of sidelink
5.1.1.3.1 Scrambling
The bit block (where Mbit is the number of bits sent)
transmitted on the PSSCH in a subframe shall be scrambled according to 5.3.1 of 3GPP TS 36.211 (Release 14).
The scrambling sequence shall be initialized at the beginning of each PSSCH subframe according to , where for the sidelink
transmission mode 3 and the sidelink transmission mode 4, p and L are given by 5.1.1 of 3GPP TS 36.212 (Release 14), is equal to the decimal
representation of the CRC check code of the PSCCH as sent in the same
subframe as the PSSCH.
5.1.1.3.2 Modulation
The modulation is performed according to 5.3.2 of 3GPP TS 36.211 (Release 14). The modulation mode of PSSCH is as shown in Table 3.
3GPP TS 36.211 (Release 14). For the sidelink transmission mode 3 and the sidelink transmission mode 4, it is assumed that the sequence is generated according to subframe 5.
Resource unit mapping: The sequence di(n) is multiplied by the amplitude scaling factor to adjust the transmit power defined in 5.1.3.4; then
mapped to the resource element in the second time slot of the subframe on the antenna port 1020. The mapping relationship is as shown in the formula (4). 5.1.1.7 Demodulation reference signal
The demodulation reference signals related to PSSCH, PSCCH, PSBCH
transmission shall be transmitted according to the PUSCH of 5.5.2.1 in 3GPP TS 36.211 (Release 14); it include the following special cases.
- It shall use the parameters in Table 6, Table 7, Table 8.
- Replace PUSCH with PSSCH, PSCCH or PSBCH according to the physical
channel related to the reference signal.
- The antenna ports are given in Table 1.
- The physical resource block used in the mapping process shall be the same as the corresponding PSSCH, PSCCH or PSBCH transmission.
- 3GPP TS 36.211 (Release 14) 5.5.2.1.2 stipulates that the index k in the mapping process shall be the same as the corresponding PSSCH, PSCCH
or PSBCH transmission.
???For PSSCH and PSCCH in sidelink transmission mode 3 and sidelink
transmission mode 4, when mapping in the first time slot of a subframe, it shall use the parameters l = 2 and l = 5; when mapping in the second time slot of a subframe, it shall use the parameters l = 1 and l = 4.
???For PSBCH in sidelink transmission mode 3 and sidelink transmission
mode 4, when mapping in the first time slot of a subframe, it shall use the parameters l = 4 and l = 6; when mapping in the second time slot of a
subframe, it shall use the parameters l = 2.
- For sidelink transmission mode 3 and sidelink transmission mode 4, the mapped to the highest significant bit of the transport block.
Set L=16bit, calculate and add CRC check bit according to 5.1.1 of 3GPP TS 36.212 (Release 14), to generate bit sequence c0, c1, c2, c3, ?€?, cK-1, where ck = bk (for k = 0, 1, 2, ?€?, K-1, and K = A + L).
5.1.2.3.1.3 Channel coding
The information bits are sent to the channel coding module, denoted as c0, c1, c2, c3, ?€?, cK-1, where K is the number of bits, which uses a tail-biting convolutional code with a code rate of 1/3 (according to the provisions of 5.1.3.1 of 3GPP TS 36.212 (Release 14).
The bit stream after channel coding is denoted as ,
where i = 0, 1 or 2, D is the number of bits of bit stream after the ith code, that is, D = K.
5.1.2.3.1.4 Rate matching
The code block after tail-biting convolutional coding is sent to the rate matching module, denoted as , where i = 0, 1, or 2, i is the bit stream
number, D is the number of bits in each coded bit stream. The code block is subject to rate matching in accordance with the method of 5.1.4.1 of 3GPP TS 36.212 (Release 14).
The bit stream after rate matching is denoted as , where E is
the total number of bits after rate matching.
5.1.2.3.2 Sidelink shared channel (SL-SCH)
The sidelink shared channel (SL-SCH) is processed according to the downlink shared channel processing procedure as specified in 5.3.2 of 3GPP TS 36.212 (Release 14), using code block concatenation coding with a code rate of 1/3 (according to 5.1.3.2 of 3GPP TS 36.212 (Release 14)), but with the following differences.
- Data arrives at the coding unit in the form of at most one transmission block per TTI.
- In the code block concatenation step, the coded bit sequence
corresponding to a transmission block after the code block concatenation is regarded as a code word described in 5.1.1.3.1.
- According to 5.2.2.7 and 5.2.2.8 of 3GPP TS 36.212 (Release 14), PUSCH interleaving operation without any control information shall be performed in order to perform time domain first instead of frequency domain mapping, - Time interval between initial transmission and retransmission: 4 bits, as defined in 5.1.3.2.1.4.
- Modulation and coding method: 5 bits, as defined in 5.1.3.3.1.
- Retransmission index: 1 bit, as defined in 5.1.3.3.1.
- Added reserved information bits, until the length of SCI format 1 is 32 bits. The value of the reserved information bit is 0.
5.1.2.3.4 DCI format 5A
DCI format 5A uses tail-biting convolutional coding with a code rate of 1/3 [as specified in 5.1.3.1 of 3GPP TS 36.212 (Release 14)], which is used to schedule PSCCH in sidelink transmission mode 3, meanwhile includes several fields of SCI format 1 for scheduling PSSCH.
The following information is sent in DCI format 5A.
- Carrier indicator: 3 bits, as defined in 5.1.3.3.1.
- The minimum index of the sub-channel assigned to the initial transmission: bits, as defined in 5.1.3.2.1.4.
- Field of SCI format 1, as defined in 5.1.2.3.3.3.
??? Frequency domain resource location for initial transmission and
retransmission.
???The time interval between initial transmission and retransmission.
- SL index: 2 bits, as defined in 5.1.3.3.1 (this field only appears in the case of TDD duplex mode with an uplink and downlink ratio of 0 ~ 6).
When the CRC of DCI format 5A is scrambled by SL-SPS-V-RNTI, the following fields are also included.
- SLSPS configuration index: 3 bits, as defined in 5.1.3.3.1.
- Activation/release indication: 1 bit, as defined in 5.1.3.3.1.
If the number of information bits in the DCI format 5A mapped to the search space is smaller than the payload size of the DCI format 0 mapped to the same search space, 0 shall be filled in the DCI format 5A, until the payload size of the format 5A is equal to the payload size of the DCI format 0 including padding bits.
If the CRC of DCI format 5A is scrambled by SL-V-RNTI, meanwhile the number on a subframe, then the measured PSSCH-RSRP can be used for the
subframes before receiving SCI format 1 indicated by the SCI format 1. If the SCI format 1 that schedules the same transport block is successfully decoded in only one subframe, then the PSSCH-RSRP measured by the UE on the
subframe of the successfully decoded SCI format 1 can be used for another subframe as indicated by the SCI format 1. The UE does not need to decode the PSSCH before successfully decoding the corresponding SCI format 1.
5.1.3.2 Related processes of physical sidelink shared channel
5.1.3.2.1 UE procedure for transmitting PSSCH
5.1.3.2.1.1 Overview
If the UE sends SCI format 1 on the PSCCH of subframe n according to the PSCCH resource configuration, then for the corresponding PSSCH
transmission on the same TB:
- For sidelink transmission mode 3.
???The determination of subframe set and resource block set shall be based on the subframe pool indicated by PSSCH resource configuration
(specified in 5.1.3.2.3) and the "retransmission index and initial
retransmission time interval" field in SCI format 1 and the "initial
transmission and retransmission frequency domain resource location"
field (as specified in 5.1.3.2.1.4).
- For sidelink transmission mode 4:
???The determination of subframe set and resource block set shall be based on the subframe pool indicated by PSSCH resource configuration
(specified in 5.1.3.2.3) and the "retransmission index and initial
retransmission time interval" field and "initial transmission and
retransmission frequency domain resource location" field (specified in
5.1.3.2.1.4).
- The modulation order is determined according to the "modulation coding method" field (IMCS) in SCI format 1. For 0 ??? IMCS ??? 28, the modulation order is set as Q' = min(4, Q'm), wherein Q'm shall be determined according to Table 11.
the measured value Ex,y is defined as the linear average value of the
subchannel measurement the partial
subframe monitored in step b). When Prsvp_TX ??? 100, the subframe
measured by Ex,y is expressed as and j is a negative integer;
When Prsvp_TX ??? 100, the subframe measured by Ex,y is expressed as
and j is a negative integer.
i) The UE shall move the single subframe candidate resource with the
smallest measurement value Ex,y from the set SA to the set SB. This step shall be repeated before the number of single subframe candidate
resources in the set SB is greater than or equal to 0.2?€?Mtotal.
UE will report the SB to higher layer.
If the upper layer has configured partial perception, the following steps shall be performed.
a) A single subframe candidate resource Rx,y used for PSSCH transmission is defined as a set of LsubCH consecutive subchannels x+j on the subframe , where . The UE shall determine the set of subframes
consisting of at least Y subframes on the time interval
according to the implementation, where the selection of T1 and T2 depends on the UE implementation and shall satisfy T1 ??? 4 and 20 ??? T2 ??? 100. The UE's selection of T2 shall meet the delay requirement and Y shall be
greater than or equal to the upper layer parameter minNumCandidateSF.
The UE shall assume any LsubCH consecutive subchannels in the
corresponding PSSCH resource pool in the determined subframe set as
single subframe candidate resources. The total number of candidate
resources in a single subframe is denoted as Mtotal.
b) For a subframe included in the subframe set in step a), if the kth bit of the high-level parameter gapCandidateSensing is set to 1, the UE shall
monitor each subframe . The UE shall perform operations in
accordance with the following steps based on the PSCCH decoding and
S-RSSI measurement on these subframes.
c) The parameter Th??,b is set to the ith value in the SL-ThresPSSCH-RSRP field of the SL-ThresPSSCH-RSRP-List, where i = ?? x 8 + b + 1.
d) Initialize the set SA as a set of all single-subframe candidate resources. When a set of subframes is selected as a set of
PSSCH transmission opportunities, then the set of subframes
that is used as another set of PSSCH
transmission opportunities shall satisfy the conditions -15 ??? K ??? 15 and k???0. Among them, P'rsvp_TX = Pstep x Prsvp_TX/100 is the maximum value of PSSCH transmission opportunities in a selected subframe set, Prsvp_TX is the resource reservation time interval provided by the higher layer.
5.1.3.2.2 UE process for receiving PSSCH
For the sidelink transmission mode 3, by detecting SCI format 1 on the PSCCH, the UE shall decode the PSSCH according to the detected SCI format 1,
meanwhile the corresponding PSSCH resource is configured by the higher
layer.
For the sidelink transmission mode 4, by detecting SCI format 1 on the PSCCH, the UE shall decode the PSSCH according to the detected SCI format 1,
meanwhile the corresponding PSSC...

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