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YD/T 3340-2018 PDF English


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YD/T 3340-2018: PDF in English (YDT 3340-2018)

YD/T 3340-2018 YD COMMUNICATION INDUSTRY STANDARD OF THE PEOPLE’S 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 Thα,b is set to the ith value in the SL-ThresPSSCH-RSRP field of the SL-ThresPSSCH-RSRP-List, where i = α 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 PSSCH resource is configured by the higher layer. 5.1.3.2.3 UE process for determining PSSCH resource pool and subframe pool for sidelink transmission mode 3 or 4 In sidelink transmission mode 3 or 4, the set of subframes that may belong to a PSSCH resource pool is denoted as , where: - 0 ≤ < 10240. - The subframe index is related to the subframe #0 of the wireless structure, wherein the subframe #0 of the wireless structure is consistent with the SFN0 or DFN0 of the serving cell. - The subframe set includes all subframes except the following subframes. ■The subframe which is set as SLSS resource. ■ The downlink subframes and special subframes when the sidelink transmission occurs in a TDD cell. ■Reserved subframes determined according to the following steps. Step 1) After the Nslss and Ndssf subframes shall be excluded from the set of all subframes, the index of the remaining subframes are arranged in ascending order, which is recorded as Where: j - j = 0, 1, …, nsubCHsize - 1; nsubCHRBstart - Given by the high-level parameter startRBSubchannel; nsubCHsize - Given by the high-level parameter sizeSubchannel. 5.1.3.3 Related processes of the physical sidelink control channel 5.1.3.3.1 UE process for transmitting PSCCH 5.1.3.3.1.1 UE process for transmitting PSCCH For sidelink transmission mode 3. - The UE shall determine the subframe and resource block for transmission SCI format 1 according to the following steps. ■SCI format 1 is sent on each time slot of the corresponding PSSCH subframe; it shall use 2 physical resource blocks. ■If the UE receives the SL-V-RNTI scrambled CRC's DCI format 5A on subframe n, then one transmission of PSCCH shall be performed on the PSCCH resource LInit (specified in 5.1.3.3.3) of subframe n + kinit, where LInit the value in the "lowest sub-channel index allocated to the initial transmission" field in the sidelink permit, kinit is the minimum integer which is greater than or equal to 4+m and satisfies the conditions that the subframe n + kinit is included in the determined according to 5.1.3.2.3. If the corresponding DCI format 5A contains the "SL Index" field determined according to Table 13, then the value of m is the value indicated in the "SL Index" field, otherwise m = 0. ■If the “interval between initial transmission and retransmission” in the configured sidelink permit is not equal to 0, then another PSSCH transmission shall be performed on the PSCCH resource LReTX of subframe , where SFgap is the value indicated in the "time interval between initial transmission and retransmission" field in the configured sidelink permit. LReTX corresponds to the value of as determined according to the process of 5.1.3.2.1.4, which is the RIV value as set in the "initial transmission and retransmission frequency domain resource location" field in the configured sidelink permit. ■If the UE receives the SL-SPS-V-RNTI scrambled CRC's DCI format 5A on subframe n, the UE shall consider the received DCI information as a valid sidelink semi-continuous activation or release, whilst the semi- continuous activation or release only corresponds to the SPS configuration as indicated by the SL SPS configuration index field. If the received DCI activates an SL SPS configuration, then one transmission of PSCCH shall be performed on the PSCCH resource Lint (specified in 5.1.3.3.3) of subframe n+kinit, where Lint is value indicated by the “lowest index of the sub-channel assigned to the initial transmission” in the configured sidelink permit, kinit is the smallest integer that is greater than or equal to 4+m and meets the condition that subframe n+kinit is included in , wherein is determined according to 5.1.3.2.3. If the corresponding DCI format 5A contains the "SL Index" field as determined according to Table 13, then the value of m is the value indicated by the "SL Index" field, otherwise m = 0. ■If in the configured sidelink permit (3GPP TS 36.321 (Release 14)), the "time interval between initial transmission and retransmission" value is not equal to 0, then another PSCCH transmission shall be performed on the PSCCH resource LReTX of subframe , where SFgap is the value indicated in the "time interval between initial transmission and retransmission" field in the configured sidelink permit. LReTX corresponds to the value as determined according to 5.1.3.2.1.4, which is the RIV value as set in the "initial transmission and retransmission frequency domain resource location" field in the configured sidelink permit. - UE shall set the content in SCI format 1 according to the following requirements. ■The UE shall set the modulation and coding method according to the instructions of the higher layer. ■The UE shall set the "Priority" field according to the highest priority among the corresponding transport block priorities indicated by the higher layers. ■The UE shall set the "time interval between initial transmission and retransmission" field, the "initial transmission and retransmission frequency domain resource location" field, the "retransmission index" field. The time domain and frequency domain resources determined for PSSCH according to 5.1.3.2.1.4 shall be consistent with the PSSCH allocated resources as indicated by the configured sidelink permit. ■The UE shall set the value of the resource reservation field to 0. ■Each transmission of SCI format 1 shall be performed on two physical resource blocks in one subframe and each time slot of the subframe. - The UE shall randomly select the cyclic shift bit ncs,λ from {0, 3, 6, 9} for each time of PSCCH transmission. For sidelink transmission mode 4. - The UE shall determine the subframes and resource blocks for SCI format transmission according to the following requirements. ■SCI format 1 shall be transmitted using two physical resource blocks in each time slot of the corresponding PSSCH subframe. ■If the sidelink permit configured by the higher layer indicates the PSCCH resource on subframe , then one transmission of PSCCH shall be performed on the PSCCH resource m (specified in 5.1.3.3.3) indicated on subframe . ■If the "time interval between initial transmission and retransmission" value in the configured sidelink permit is not equal to 0, then another PSCCH transmission shall be performed on the PSCCH resource LRcTX of subframe , where SFgap is the value as indicated in the "time interval between initial transmission and retransmission" field in the configured sidelink permit; LRcTX corresponds to the value of as determined in the process of 5.1.3.2.1.4. This value is the RIV value as set in the "initial transmission and retransmission frequency field resource location" in the configured sidelink permit. - The UE shall set the content in SCI format 1 according to the following requirements. ■The UE shall set the modulation and coding method according to the instructions of the higher layer. ■The UE shall set the "Priority" field according to the highest priority among the corresponding transport block priorities indicated by the higher layers. ■The UE shall set the " time interval between initial transmission and retransmission" field, the "initial transmission and retransmission synchronization signal resource configuration of the corresponding sidelink. 5.1.3.5 Priority processing between SL and Uu When the V2X sidelink transmission overlaps the Uu uplink transmission, if the Uu uplink performs a random access procedure or the transmission priority is high (such as emergency calls specified in 3GPP TS 24.386 (Release 14)), the Uu uplink transmission is given priority (regardless of the PPPP value of the MAC PDU of the sidelink). When the V2X sidelink transmission overlaps with the Uu uplink transmission, if the SCI "priority" field's setting value of...... ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.