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WO2018203818A1 - Détermination de taille de bloc de transmission - Google Patents

Détermination de taille de bloc de transmission Download PDF

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Publication number
WO2018203818A1
WO2018203818A1 PCT/SE2018/050460 SE2018050460W WO2018203818A1 WO 2018203818 A1 WO2018203818 A1 WO 2018203818A1 SE 2018050460 W SE2018050460 W SE 2018050460W WO 2018203818 A1 WO2018203818 A1 WO 2018203818A1
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WO
WIPO (PCT)
Prior art keywords
data block
transmission data
block size
physical resource
signaling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SE2018/050460
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English (en)
Inventor
Daniel Larsson
Yu Yang
Jung-Fu Cheng
Magnus Stattin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to US16/069,143 priority Critical patent/US11399309B2/en
Publication of WO2018203818A1 publication Critical patent/WO2018203818A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes

Definitions

  • the present disclosure relates to wireless communication systems and, in particular to New Radio (NR) control channels and determining transmission data block size within the communication systems.
  • NR New Radio
  • one parameter in providing good performance and capacity for a given communications protocol in a communications network is the slot size.
  • An NR slot consists of several orthogonal frequency-division multiplexing (OFDM) symbols, such as either 7 or 14 symbols per slot (for OFDM subcarrier spacing ⁇ 60 kHz) or 14 symbols per slot (for OFDM subcarrier spacing > 60 kHz).
  • FIG. la shows a subframe with 14 OFDM symbols as an example.
  • T s and T symb denote the slot duration and OFDM symbol duration, respectively.
  • a slot may also be shortened to
  • DL symbols 110 represents one or more DL symbols 112
  • UL symbols 120 represents one or more UL symbols.
  • the first UL symbol 122 is represented to come before the other UL symbols 124.
  • NR also defines mini-slots.
  • Mini-slots are shorter in time than slots (according to some examples, they range from one or two symbols up to number of symbols in a slot minus one) and can start at any symbol.
  • Mini- slots are used if the transmission duration of a slot is too long or the occurrence of the next slot start (slot alignment) is too late.
  • Applications of mini-slots include, among others, latency critical transmissions (in this case both mini-slot length and frequent opportunity of mini-slot are important) and unlicensed spectrum where a transmission should start immediately after listen-before-talk succeeded (here the frequent opportunity of mini-slot is especially important).
  • FIG. lc shows an example of a mini-slot with a first and second OFDM symbol 132 (two OFDM symbols).
  • Latency Reduction with Short transmission time interval Packet data latency is one of the performance metrics that vendors, operators, and end- users (via speed test applications) regularly measure. Latency measurements are done in all phases of a radio access network system lifetime, in part: when verifying a new software release or system component; when deploying a system; and when the system is in commercial operation.
  • LTE Long Term Evolution
  • Packet data latency is important not only for the perceived responsiveness of the system; it is also a parameter that indirectly influences the throughput of the system.
  • HTTP Hypertext Transfer Protocol
  • TCP Transmission Control Protocol
  • the typical size of HTTP -based transactions over the internet are in the range of a few tens of Kbyte up to 1 Mbyte.
  • the TCP slow-start period is a significant part of the total transport period of the packet stream.
  • the performance is latency limited.
  • improved latency can rather easily be showed to improve the average throughput, for this type of TCP based data transactions. Latency reductions could positively impact radio resource efficiency.
  • Lower packet data latency could increase the number of transmissions possible within a certain delay bound; hence higher Block Error Rate (BLER) targets could be used for the data transmissions freeing up radio resources potentially improving the capacity of the system.
  • BLER Block Error Rate
  • a TTI corresponds to one subframe (SF) of length l millisecond.
  • SF subframe
  • SC-FDMA single carrier frequency-division multiple access
  • An sTTI can be decided to have any duration in time and comprise resources on any number of OFDM or SC-FDMA symbols, and start at symbol position within the overall frame.
  • the focus of the work currently is to only allow the sTTIs to start at fixed positions with durations of either two, three, four, or seven symbols.
  • the sTTI is not allowed to cross either the slot or subframe boundaries.
  • FIG. id which is an example of a 2/3-symbol sTTI configuration within an uplink subframe, where the duration of the uplink short TTI is 0.5 ms, i.e., seven SC-FDMA symbols for the case with normal cyclic prefix.
  • PDCCHs Physical downlink control channels
  • DCI downlink control information
  • the PDCCHs are, in general, transmitted at the beginning of a slot and relate to data in the same or a later slot (for mini-slots PDCCH can also be transmitted within a regular slot).
  • Different formats (sizes) of the PDCCHs are possible to handle different DCI payload sizes and different aggregation levels (i.e., different code rate for a given payload size).
  • Each user equipment (UE) is configured (implicitly and/or explicitly) to monitor (or search) for a number of PDCCH candidates of different aggregation levels and DCI payload sizes.
  • the UE Upon detecting a valid DCI message (i.e., the decoding of a candidate is successful and the DCI contains an identifier (ID) the UE is told to monitor) the UE follows the DCI (e.g., receives the corresponding downlink data or transmits in the uplink).
  • ID identifier
  • a 'broadcasted control channel' to be received by multiple UEs.
  • Such a channel has been referred to as 'group common PDCCH'.
  • information about the slot format i.e., whether a certain slot is uplink or downlink, which portion of a slot is UL or DL.
  • Such information could be useful, for example, in a dynamic Time Division Duplex (TDD) system.
  • TDD Time Division Duplex
  • the DCI carries several parameters to instruct the UE how to receive the downlink transmission or to transmit in the uplink.
  • the FDD LTE DCI format lA carries parameters such as: a Localized/Distributed Virtual Resource Block (VRB) assignment flag; Resource block assignment; Modulation and coding scheme (MCS); Hybrid automatic repeat request (HARQ) process number; New data indicator; Redundancy version; and a Transmit Power Control (TPC) command for the Physical Uplink Control Channel (PUCCH).
  • VRB Localized/Distributed Virtual Resource Block
  • MCS Modulation and coding scheme
  • HARQ Hybrid automatic repeat request
  • TPC Transmit Power Control
  • PUCCH Physical Uplink Control Channel
  • TBS transport block size
  • the UE uses the MCS given by the DCI to read a TBS index l TBS from an MCS table.
  • An example of an MCS table is shown in Table l.
  • the UE determines the number of physical resource blocks (PRBs) as N from the Resource block assignment given in the DCI.
  • the UE uses the TBS index ITBS the number of PRBs to read the actual transport block size from a TBS table.
  • a portion of the TBS table is shown in Table 2 as an example.
  • the full table is provided in 3GPP TS 36.213, clause 7.1.7.2.
  • An object of embodiments herein is thus to provide mechanisms enabling efficient determination of the TBS that do not suffer from the issues noted above, or at least where these issues are reduced or mitigated.
  • a method in a wireless device adapted for operation in a communication network comprises obtaining a pre-defmed rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a wireless device for operation in a communication network.
  • the wireless device comprises processor.
  • the processor is configured to cause the wireless device to obtain a pre-defmed rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a wireless device for operation in a communication network.
  • the wireless device comprises an obtain module configured to obtain a pre-defmed rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/ or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a computer program for operation in a communication network comprising computer program code which, when run on processor of a wireless device, causes the wireless device to perform a method according to the first aspect.
  • a method in a network node for operation in a communication network comprises obtaining a pre-defined rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a network node for operation in a communication network.
  • the network node comprises processor.
  • the processor is configured to cause the network node to obtain a pre-defined rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/ or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a network node for operation in a communication network.
  • the network node comprises an obtain module configured to obtain a pre-defined rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time-domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • a computer program for operation in a communication network comprising computer program code which, when run on processor of a network node, causes the network node to perform a method according to the fifth aspect.
  • a computer program product comprising a computer program according to at least one of the fourth aspect and the eight aspect and a computer readable storage medium on which the computer program is stored.
  • the computer readable storage medium could be a non-transitory computer readable storage medium.
  • FIG. 1 schematically illustrates an example of a slot according to an NR system
  • FIG. lb schematically illustrates an example of slot variations according to an NR system
  • FIG. lc schematically illustrates an example of a mini-slot with two OFDM symbols according to an NR system
  • FIG. id schematically illustrates an example of a 2/3-symbol sTTI
  • FIG. 2 illustrates one example of a wireless communications system in which embodiments of the present disclosure maybe implemented
  • FIGs. 3(a) and 3(b) are flow charts that illustrate the operation of a radio node according to some embodiments of the present disclosure
  • FIGs. 4(a) and 4(b) are flow charts that illustrate the operation of a radio node according to other embodiments of the present disclosure
  • FIGS. 5 and 6 are block diagrams that illustrate a wireless device according to some embodiments of the present disclosure.
  • FIGS. 7 through 9 are block diagrams that illustrate a radio access node according to some embodiments of the present disclosure.
  • Radio Node As used herein, a "radio node” is either a radio access node or a wireless device.
  • Radio Access Node is any node in a radio access network of a cellular communications network that operates to wirelessly transmit and/or receive signals.
  • a radio access node include, but are not limited to, a base station (e.g., an enhanced or evolved Node B (eNB) in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) network or a gNB in a 3GPP New Radio (NR) network), a high-power or macro base station, a low-power base station (e.g., a micro base station, a pico base station, a home eNB, or the like), and a relay node.
  • a base station e.g., an enhanced or evolved Node B (eNB) in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) network or a gNB in a 3GPP New Radio (NR) network
  • 3GPP Third Generation Partnership Project
  • LTE Long Term Evolution
  • NR 3GPP New Radio
  • a “core network node” is any type of node in a core network.
  • Some examples of a core network node include, e.g., a Mobility Management Entity (MME), a Packet Data Network (PDN) Gateway (P-GW), a Service Capability Exposure Function (SCEF), or the like.
  • MME Mobility Management Entity
  • PDN Packet Data Network
  • SCEF Service Capability Exposure Function
  • Network Node As used herein, a "network node” is any node that is either part of the radio access network or the core network of a cellular
  • a “wireless device” is any type of device that has access to (i.e., is served by) a cellular communications network by wirelessly transmitting and/or receiving signals to a radio access node(s).
  • a wireless device include, but are not limited to, a User Equipment device (UE) in a 3GPP network and a Machine Type
  • MTC Mobile Communication
  • UE User Equipment
  • terminal mobile station
  • handset wireless device
  • wireless device etc.
  • a wireless infrastructure e.g., network equipment such as base stations, gNB, eNB, and the like.
  • the term should not be construed as to mean any specific type of device, it applies to them all, and the solutions described here are applicable to all devices that use methods according embodiments of the present disclosure.
  • a base-station is intended to denote the node in the wireless infrastructure that communicates with the UE. Different names maybe applicable, and the functionality of the base-station maybe distributed in various ways.
  • base-station will refer to all alternative architectures that can implement (or may be operable to carry out) some embodiments according to the present disclosure.
  • NR and 5G are used in the present disclosure interchangeably.
  • a base-station can be referred to as gNB instead of eNB.
  • TRP Transmission-Receive-point
  • 3GPP LTE terminology or terminology similar to 3GPP LTE terminology is oftentimes used.
  • the concepts disclosed herein are not limited to LTE or a 3GPP system.
  • 'DL/UL transmission' refers to a communication link with a transmitter from one radio node and a receiver at another radio node.
  • the functions of network node and UE node are not symmetric, therefore there is a DL and a UL.
  • two nodes are symmetric by function.
  • 'Sidelink transmission (or communication)' also refers to a communication link with a transmitter from one node and a receiver at another node.
  • Embodiments of the present disclosure determining transmission data block size potentially allow an easier evolution or changes of the system and/ or improved performance.
  • FIG. 2 illustrates one example of a wireless communications system 10 (e.g., a cellular network) in which embodiments of the present disclosure may be implemented.
  • the wireless communications system 10 includes a radio access node 12 that provides wireless, or radio, access to a wireless device 14.
  • the radio access node, or base station is connected to a core network (CN, not shown).
  • CN core network
  • the communications system 10 is a 3GPP LTE network in which case the radio access node 12 maybe an eNB (and thus referred to herein as an eNB 12).
  • the wireless communications system 10 is a 3GPP NR network in which case the radio access node 12 may be a gNB (and thus referred to therein as a gNB 12).
  • the radio access node 12 is an eNB 12 and the wireless device 14 is a UE (and thus referred to herein as a UE 14); however, the present disclosure is not limited thereto.
  • TDBS transmission data block size
  • TBS transport block size
  • TDBS transmission data block size
  • PRB Physical Resource Block
  • PRB Physical Resource Block
  • VoIP voice over IP
  • Possible sizes from the VoIP service include, for instance, 144, 176, 208, 224, 256, and 328 bits.
  • the VoIP services generate a large number of packets, each of which with specific sizes. It becomes beneficial for the system to handle these specific packet sizes specifically to optimize performance of the system and the specific services.
  • Table 3 Exemplary transmission data block sizes for the first few MCS levels and for N PRB ⁇ 10.
  • This MCS level requires 64 quadrature amplitude modulation (QAM) and, hence, is operable only at high signal-to-noise ratio (SNR) situations. Communication link performance will be degraded if the nodes send data of this sizes without the required SNR.
  • FIG. 3(a) A flow chart illustrating a method for a radio node according to embodiments of one aspect of the disclosure is illustrated in FIG. 3(a).
  • the method is for a radio node, for example wireless device 14.
  • the method comprises the following steps:
  • Step 100 OBTAINING INFORMATION (Pre-defmed Rule) THAT ALLOWS TO DETERMINE TDBS
  • Step 104 DETERMINING TDBS from the Pre-defmed Rule, WHEREIN THE TDSB IS BASED, AT LEAST IN PART, ON AN EFFECTIVE NUMBER OF RESOURCE ELEMENTS, N RE
  • Step 108 (optional): USING THE DETERMINED TDBS IN
  • FIG. 3(b) A flow chart illustrating a method for a radio node according to embodiments of one aspect of the disclosure is illustrated in FIG. 3(b).
  • the method is for a radio node, for example wireless device 14.
  • the method comprises the following steps: S302: obtaining a pre-defmed rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time- domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • S308 (optional): determining whether a combination of MCS level and a resource allocation size applicable for the downlink assignment corresponds to a combination indicated by the first signaling.
  • S310 responsive to a positive outcome of the determination, receiving downlink data in accordance with the downlink assignment applying a transmission data block size indicated by the first signaling.
  • S312 receiving downlink data from a node of the communication network while applying a transmission data block size in accordance with the first signaling.
  • FIG. 4(a) A flow chart illustrating a method for a radio node according to embodiments of another aspect of the disclosure is illustrated in FIG. 4(a).
  • the method is for a radio node, for example network node 11.
  • the method comprises the following steps:
  • STEP 200-A TRANSMITTING INFORMATION (Pre-defined Rule) THAT ALLOWS A SECOND RADIO NODE TO DETERMINE TDBS, THE TDBS BASED AT LEAST IN PART ON AN EFFECTIVE NUMBER OF RESOURCE ELEMENTS; AND/OR
  • STEP 200-B CAUSING ANOTHER RADIO NODE TO TRANSMIT
  • Steps 200-A and 200-B may both be performed, or only one maybe performed. If both are performed, the information transmitted in each step maybe complementary.
  • a flow chart illustrating a method for a radio node according to embodiments of another aspect of the disclosure is illustrated in FIG. 4(b). The method is for a radio node, for example network node 11. The method comprises the following steps:
  • S402 obtaining a pre-defmed rule for computing a default transmission data block size on the basis of one or more input parameters selected from: a number of allocated physical resource blocks, a number of allocated time- domain symbols, an effective number of resource elements per physical resource block and/or symbol, a number of spatial layers, a modulation order, and a code rate.
  • S404 (optional): sending first signaling at least partially overriding values obtainable by the pre-defmed rule.
  • the transmission data block size is determined using the effective number of resource elements per PRB.
  • PRB is used as the frequency domain unit of resource allocation, and has no limitation of the resource allocated in time domain.
  • the radio node e.g., a UE
  • the transmission data block size is given by:
  • the pre-defined rule for computing the transmission data block size comprises a factor given by this equation.
  • the pre-defined rule specifies the transmission data block size to be aligned with byte size.
  • the transmission data block size is adjusted to be aligned with a specific size unit C: Rs 1 N RE ⁇ v ⁇ Q m ⁇ r
  • a transport block maybe sub-divided into multiple code blocks with constraint that all code blocks are of equal size. The same maybe applicable to other protocols.
  • the parameters that are used to derive the transmission data block size may be known to both the transmitter and the receiver of a radio access link.
  • the parameters (or parameter values, or information related to the parameters) maybe signaled between the transmitter and receiver either semi-statically, i.e., via higher layer signaling, or dynamically such as via physical control information (e.g., downlink control information (DCI)).
  • DCI downlink control information
  • the signaling of parameter values can be implicit (e.g., via other parameters) or explicit (e.g., as standalone parameters). While other variations are possible, one embodiment is described below.
  • modulation order Q m and code rate r are signaled dynamically via DCI, and are provided by one DCI field called MCS. This is described with further details below.
  • MCS DCI field
  • the number of spatial layers v is provided by a DCI field, e.g., with the related MIMO scheme configured semi-statically via higher layer signaling.
  • the number of allocated PRBs N PRB is signaled dynamically by a DCI field, or implied by PRB allocation which is also signal dynamically by a DCI field.
  • the effective number of resource elements per PRB N RE can be provided in multiple ways as described below. Further details are provided below.
  • the effective number of resource elements per PRB can be determined by various configurations, including: the slot configuration (including mini-slot), FDD vs TDD, control region configuration, the reference symbol configuration etc. In this case, no signaling of N RE is necessary.
  • the implicitly derived value can also be considered the default value, which can be overwritten by an explicitly signaled value.
  • Explicitly via higher layer signaling This is semi-static configuration of N RE .
  • the gNB can select a value of N RE from a set of predefined values of N RE , and then send the selected value of N RE to the radio node (e.g., a UE) during RRC configuration or reconfiguration. The selected value of N RE is assumed by both transmitter and receiver for all subsequent transmission until a new value is signaled via higher layer signaling.
  • N RE Explicitly via DCI.
  • the gNB can select a value of N RE from a set of predefined values of N RE , and then send the selected value to the UE via a DCI field.
  • the DCI signaled value is only used for the data transmission related to the DCI, not all subsequent transmission.
  • the value of N RE may be used for the single data transmission only.
  • the value of N RE maybe used for the multiple data
  • a combination of above methods For example, explicitly via a combination of higher layer signaling and DCI signaling. This uses a combination of semi- static configuration and dynamic configuration of N RE .
  • a higher layer signaling could be a base value, while an offset from the base value could be signaled by the DCI.
  • aspects and embodiments of the present disclosure are applicable for any radio access link between a transmitter and a receiver of two different radio nodes, respectively, including downlink data transmission, uplink data transmission and side-link communication.
  • N RE there may be one for downlink communication and another one for uplink communication.
  • one parameter N RE ' PRB is defined for downlink data transmission
  • another parameter N RE ' PRB is defined for uplink data transmission.
  • N RE ,PRB and N RE ,PRB take independent and different values.
  • yet another parameter can be defined for sidelink. In this case, two peer devices can share a single sidelink parameter N ⁇ ,PRB .
  • the block size may have to be kept the same, even when: DCI of a transmission or retransmission is not received correctly, including the initial transmission;
  • HARQ-ACK response (where ACK is short for acknowledgement) to a transmission or retransmission is not received correctly, including the initial transmission; Time and or frequency resource configuration changes between the (re-) transmissions of a same data block.
  • the base station may have to make sure that when considering the aggregated effect of all parameters, the data block size (TDBS) obtained by embodiments of above method stays the same for a given transport block, even if individual parameter value may change.
  • TDBS data block size
  • a radio node e.g., a UE uses an MCS index I MCS to determine the modulation order Q m and code rate r.
  • the radio node e.g., a UE reads said modulation order Q m and code rate r from an MCS table using said MCS index I MCS .
  • a non-limiting example of the MCS table is shown in Table 4.
  • Multiple MCS tables can be defined in the NR system. For example,
  • Downlink and uplink may have different MCS tables; OFDM and DFT-S- OFDM based transmission may use different MCS tables; or Different radio node (e.g., UE) categories may use different MCS tables.
  • UE Radio node
  • low- cost UEs e.g., MTC UE, NB-IoT UEs
  • MTC UE Mobility Management Entity
  • NB-IoT UEs may use different MCS tables.
  • a further feature in some embodiments according to the present disclosure is that the effective number of resource elements per PRB N RE is semi-statically configured by the network via higher layer signaling system.
  • This effective number of resource elements per PRB N RE can be included in the system information block transmission or broadcast.
  • This effective number of resource elements per PRB N RE can be configured by higher protocols such as the radio resource control (RRC) layer protocol.
  • RRC radio resource control
  • the network via higher layer signaling, semi-statically configures a set of values for the effective number of resource elements per PRB N RE .
  • An index may be included in the downlink control information (DCI) to indicate the N RE value that the radio node (e.g., UE) should apply to the DCI.
  • DCI downlink control information
  • N RE values are semi-statically configured and a l-bit index is included in the DCI to select the applicable N RE value.
  • four N RE values are semi-statically configured and a 2-bit index is included in the DCI to select the applicable N RE value.
  • the effective one or multiple numbers of resource elements per PRB N RE are provided in the DCI.
  • N RE PRB N RE PRB
  • N RE ' PRB 12 ⁇ n 0FDM — N RE RS .
  • n 0FDM is the number of OFDM symbols used for data transmission.
  • Lower values of n 0FDM is expected when mini-slot is used for data transmission.
  • N RE RS is the average number of resource elements per PRB used for the Phase Tracking Reference Signal (PTRS).
  • PTRS Phase Tracking Reference Signal
  • 12 refers to the existence of twelve subcarriers in a PRB.
  • the transmission data block size is determined using the effective number of resource elements per time-domain symbol per PRB.
  • the time-domain symbol can be either OFDM symbol or DFT-SC-OFDM symbol, where DFT is short for Discrete Fourier Transform, and SC is short for single carrier.
  • the UE determine the transmission data block size based on a modulation order Q m , a code rate r, the number of spatial layers v, the allocated number of PRBs N PRB , the number of allocated time-domain symbols (OFDM symbols or DFT-SOFDM symbols) N SYMB , and an effective number of resource elements per OFDM symbol (or DFT-SC-OFDM symbol) per PRB symb
  • the transmission data block size is given by:
  • the transmission data block size is adjusted to be aligned with a specific size unit C:
  • a transport block maybe sub-divided into multiple code blocks with constraint that all code blocks are of equal size.
  • the parameters that are used to derive the transmission data block size are known to both the transmitter and the receiver.
  • the knowledge about the parameter values is signaled between the transmitter and receiver either semi-statically via higher layer signaling, or dynamically via downlink control information (DCI).
  • DCI downlink control information
  • the signaling of parameter value can be implicit or explicit.
  • the base station has to make sure that when considering the aggregated effect of all parameters, the data block size obtained by above method stays the same for a given transport block, even if individual parameter value may change.
  • the resource allocation in time domain is given by: the length in number of slots of the resource allocation, n Datasiots> the first OFDM symbol in the first slot of the corresponding
  • Nsym b #symbols_per_slot*#slots - #symbols_lost_at_start - #symbols_lost_at_end. That is:
  • N S ym b N S ymb n DataSlots— /D ata g tart — ( ⁇ symb _ ⁇ DataStop — l)
  • N ⁇ 12.
  • the first signaling limits the transmission data block size to 144, 176, 208, 224, 256, or 328 bits.
  • Embodiment 1 Five specific embodiments based on at least some of the above embodiments will now be disclosed.
  • Embodiment 1 Five specific embodiments based on at least some of the above embodiments will now be disclosed.
  • a temporary transmission data block size of 2500 is determined based on: It can be checked from the allowed transport block sizes for LTE turbo coding that 2472 is the largest allowed size that is not greater than 2500.
  • the transmission data block size (which is the transport block size for this LTE example) is set to 2472. It is noted that this is purely an example based on the LTE turbo code.
  • the same TBS sizes or a TBS table may further be defined also for other coding methods such as LDPC codes, Polar codes and Convolutional codes.
  • the scaling to the TBS table by the above formula only applies to DCI messages located in a specific search space, CORESET or RNTI scrambling.
  • the search space could for example be the UE specific search space. While if the DCI message is found in another search space for example the common search space a fixed TBS table may apply. That is, according to an embodiment, whether to limit the transmission data block size by partially overriding values obtainable by the pre-defmed rule depends on in which search space the DCI message is located.
  • a bit in the DCI message signals whether a fix TBS table is directly applied or the code rate scaling formula given in embodiment 1 is applied. That is, according to an embodiment, whether to use the look-up table, the specification, or the formula depends on a bit in the DCI message.
  • [x] is the ceiling function, giving the smallest integer no smaller than x
  • the configuration of the usage of embodiment 1 may further for the given use cases by RRC signaling or it may directly follow based on the operation mode the UE is in.
  • the UE is operating with shorter transmission durations in LTE sometimes referred to as sTTI or alternatively shorter processing time and it follows the scheme in embodiment 1 applies.
  • Embodiment 3 For smaller packed sizes for example corresponding to VoIP packages (could also be other smaller packages sizes) as given in the background information.
  • the embodiment 1 does not apply and these TBS can directly be selected with some other method as given in, for example, USSN 62/501815.
  • Embodiment 4 In a fourth embodiment, the transmission data block sizes of selected combination of MCS level and resource allocation size are over-written with specific values (i.e., the specific values override and are used instead of the calculated transmission data block sizes).
  • the first signaling indicates at least one combination of an MCS level and a resource allocation size and further indicates transmission data block size value associated with this combination
  • the at least one combination of MCS level and resource allocation size is selected from combinations of MCS level and resource allocation size as stored in a fixed look-up table.
  • Table 5 Exemplary over-writing transmission data block sizes for selected combinations of MCS level and resource allocation size
  • the selected combinations of MCS level and resource allocation size can be stored in a fixed look-up table associated with a service.
  • the selected combinations of MCS level and resource allocation size can be fixed in the specification of the communication network.
  • the at least one combination of MCS level and resource allocation size is selected from combinations of MCS level and resource allocation size as fixed in a specification of the communication network.
  • the selected combinations of MCS level and resource allocation size can be configured to the UE from the network using higher layer signaling. That is, according to an embodiment the first signaling is higher layer signaling.
  • One non-limiting exemplary higher layer signaling is radio resource control (RRC) signaling.
  • the selected combinations of MCS level and resource allocation size can be broadcast in a System Information Block (SIB) transmission. That is, according to an embodiment the first signaling is received as broadcast in a SIB transmission.
  • SIB System Information Block
  • an extra flag is introduced in the DCI message the flag could be a bit combination of a given set of bits in the DCI message or a bit that indicates that a TBS table should be used. That is, according to an embodiment the first signaling is received as a flag in a downlink control information, DCI, message.
  • the flag could further be an RNTI.
  • This TBS table could be point out through the MCS table so that the MCS table directly indicates both TBS and modulation order for the TBS.
  • TBS sizes are very specific it would in additional aspect be possible to limit the modulation order for them to some of the lower modulation orders for example quadrature phase shift keying (QPSK) and 16 QAM.
  • QPSK quadrature phase shift keying
  • 16 QAM 16 QAM
  • Table 6 An example of a look-up table is shown in Table 6. It is further given that the table may of course contain more TBS entries and/ or with different values. The order of them does not need to as given either in the table. Further the last entries in the table may also stipulate a retransmission of the same transport block with changed modulation order. In this embodiment the resource allocation would be separately defined from the TBS and MCS selection.
  • the UE uses a TBS look-up table for the case of it being configured with SPS or UL grant free transmissions.
  • Table 6 Exemplary MCS/TBS look-up table
  • FIG. 5 is a schematic block diagram of the wireless device 14 according to some embodiments of the present disclosure.
  • the wireless device 14 includes circuitry 16 comprising one or more processors 18 (e.g., Central Processing Units (CPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), and/or the like) and memory 20.
  • the wireless device 14 also includes one or more transceivers 22 each including one or more transmitter 24 and one or more receivers 26 coupled to one or more antennas 28.
  • the wireless device 14 includes circuitry 16 comprising one or more processors 18 (e.g., Central Processing Units (CPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), and/or the like) and memory 20.
  • the wireless device 14 also includes one or more transceivers 22 each including one or more transmitter 24 and one or more receivers 26 coupled to one or more antennas 28.
  • the wireless device 14 includes circuitry 16 comprising one or more processors 18 (e
  • wireless device 14 functionality of the wireless device 14 described above may be fully or partially implemented in software that is, e.g., stored in the memory 20 and executed by the processor(s) 18.
  • a computer program including instructions which, when executed by the at least one processor 18, causes the at least one processor 18 to carry out the functionality of the wireless device 14 according to any of the embodiments described herein is provided.
  • a carrier containing the aforementioned computer program product is provided.
  • the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non- transitory computer readable medium such as memory).
  • FIG. 6 is a schematic block diagram of the wireless device 14 according to some other embodiments of the present disclosure.
  • the wireless device 14 includes one or more modules 30, each of which is implemented in software.
  • the module(s) 30 provide the functionality of the wireless device 14 described herein.
  • the module(s) 30 may comprise, for example, an obtaining module operable to perform step 100 of FIG. 3(a), a determination module operable to perform steps 100, 104 of FIG. 3(a), and a use module operable to perform step 108 of FIG. 3(a), an obtaining module operable to perform step 302 of FIG. 3(b), a receiving module operable to perform step 304 of FIG. 3(b), a receiving module operable to perform step 306 of FIG. 3(b), a determining module operable to perform step 308 of FIG. 3(b), an applying module operable to perform step 310 of FIG. 3(b), and a receiving module operable to perform step 312 of FIG. 3(b).
  • FIG. 7 is a schematic block diagram of a network node 32 (e.g., a radio access node 12) according to some embodiments of the present disclosure.
  • the network node 32 includes a control system 34 that includes circuitry comprising one or more processors 36 (e.g., CPUs, ASICs, FPGAs, and/or the like) and memory 38.
  • the control system 34 also includes a network interface 40.
  • the network node 32 is a radio access node 12
  • the network node 32 also includes one or more radio units 42 that each include one or more transmitters 44 and one or more receivers 46 coupled to one or more antennas 48.
  • the functionality of the network node 32 described above may be fully or partially implemented in software that is, e.g., stored in the memory 38 and executed by the processor(s) 36.
  • FIG. 8 is a schematic block diagram of the network node 32 (e.g., the radio access node 12) according to some other embodiments of the present disclosure.
  • the network node 32 includes one or more modules 62, each of which is implemented in software.
  • the module(s) 62 provide the
  • the module(s) 62 may include a transmitting module operable to transmit or cause another node to transmit to a wireless device 14 information that allows determining a TDBS, as per steps 200-A and 200-B of FIG. 4(a), an obtaining module operable to perform step 402 of FIG. 4(b), and a sending module operable to perform step 404 of FIG. 4(b).
  • FIG. 9 is a schematic block diagram that illustrates a virtualized embodiment of the network node 32 (e.g., the radio access node 12) according to some embodiments of the present disclosure.
  • a "virtualized" network node 32 is a network node 32 in which at least a portion of the functionality of the network node 32 is implemented as a virtual component (e.g., via a virtual machine(s) executing on a physical processing node(s) in a network(s)).
  • the network node 32 optionally includes the control system 34, as described with respect to FIG. 9.
  • the network node 32 is the radio access node 12
  • the network node 32 also includes the one or more radio units 42, as described with respect to FIG. 9.
  • the control system 34 (if present) is connected to one or more processing nodes 50 coupled to or included as part of a network(s) 52 via the network interface 40.
  • the one or more radio units 42 are connected to the one or more processing nodes 50 via a network interface(s).
  • all of the functionality of the network node 32 described herein maybe implemented in the processing nodes 50 (i.e., the network node 32 does not include the control system 34 or the radio unit(s) 42).
  • Each processing node 50 includes one or more processors 54 (e.g., CPUs, ASICs, FPGAs, and/or the like), memory 56, and a network interface 58.
  • functions 60 of the network node 32 described herein are implemented at the one or more processing nodes 50 or distributed across the control system 34 (if present) and the one or more processing nodes 50 in any desired manner.
  • some or all of the functions 60 of the network node 32 described herein are implemented as virtual components executed by one or more virtual machines implemented in a virtual environment(s) hosted by the processing node(s) 50.
  • additional signaling or communication between the processing node(s) 50 and the control system 34 (if present) or alternatively the radio unit(s) 42 (if present) is used in order to carry out at least some of the desired functions.
  • the radio unit(s) 42 is used in order to carry out at least some of the desired functions.
  • control system 34 may not be included, in which case the radio unit(s) 42 (if present) communicates directly with the processing node(s) 50 via an appropriate network interface(s).
  • a computer program including instructions which, when executed by the at least one processor 36, 54, causes the at least one processor 36, 54 to carry out the functionality of the network node 32 or a processing node 50 according to any of the embodiments described herein is provided.
  • a carrier containing the aforementioned computer program product is provided.
  • the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non-transitory computer readable medium such as the memory 56).

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

Abstract

L'invention concerne des mécanismes de fonctionnement dans un réseau de communication. Un procédé dans un dispositif sans fil conçu pour fonctionner dans le réseau de communication consiste à obtenir une règle prédéfinie permettant de calculer une taille de bloc de données de transmission par défaut sur la base d'un ou de plusieurs paramètres d'entrée sélectionnés parmi les éléments suivants : un certain nombre de blocs de ressources physiques attribués, un certain nombre de symboles de domaine temporel attribués, un nombre effectif d'éléments de ressource par bloc de ressource physique et/ou par symbole, un nombre de couches spatiales, un ordre de modulation et un débit de code.
PCT/SE2018/050460 2017-05-05 2018-05-03 Détermination de taille de bloc de transmission Ceased WO2018203818A1 (fr)

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WO2021159237A1 (fr) * 2020-02-10 2021-08-19 Qualcomm Incorporated Répétition de cbg de pusch intracréneau pour une retransmission de harq
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CN116097588A (zh) * 2020-08-14 2023-05-09 中兴通讯股份有限公司 用于传输块大小确定过程的方法
CN116349364A (zh) * 2023-02-03 2023-06-27 北京小米移动软件有限公司 一种传输块大小的确定方法及其装置
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WO2025123302A1 (fr) * 2023-12-14 2025-06-19 Oppo广东移动通信有限公司 Procédé et appareil de transmission de données, et dispositif et support de stockage

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WO2020134610A1 (fr) * 2018-12-29 2020-07-02 中兴通讯股份有限公司 Procédé et appareil de planification de données
CN111385902B (zh) * 2018-12-29 2023-05-02 中兴通讯股份有限公司 数据调度方法及装置
CN112335279A (zh) * 2019-01-08 2021-02-05 诺基亚通信公司 用于节点内资源分配的方法和装置
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CN111436144A (zh) * 2019-01-11 2020-07-21 华为技术有限公司 一种确定传输块大小的方法及装置
CN113557683A (zh) * 2019-01-15 2021-10-26 瑞典爱立信有限公司 使用中等信息位数量的量化来确定tbs
CN111525979A (zh) * 2019-02-01 2020-08-11 中兴通讯股份有限公司 传输块大小确定方法、装置、通信设备及存储介质
US11895631B2 (en) 2019-02-26 2024-02-06 Shanghai Langbo Communication Technology Company Limited Method and device in UE and base station for radio signal transmission in wireless communication
CN111615145A (zh) * 2019-02-26 2020-09-01 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
CN111615145B (zh) * 2019-02-26 2023-04-25 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
CN114667704A (zh) * 2019-12-09 2022-06-24 华为技术有限公司 基于多维码本的无线通信发送器和接收器及其操作方法
WO2021159237A1 (fr) * 2020-02-10 2021-08-19 Qualcomm Incorporated Répétition de cbg de pusch intracréneau pour une retransmission de harq
CN116097588A (zh) * 2020-08-14 2023-05-09 中兴通讯股份有限公司 用于传输块大小确定过程的方法
US12451989B2 (en) 2020-08-14 2025-10-21 Zte Corporation Method for a transport block size determination procedure
CN114978445A (zh) * 2021-02-27 2022-08-30 上海华为技术有限公司 一种数据传输方法及其设备
CN116349364A (zh) * 2023-02-03 2023-06-27 北京小米移动软件有限公司 一种传输块大小的确定方法及其装置
WO2024168745A1 (fr) * 2023-02-16 2024-08-22 富士通株式会社 Procédé et appareil d'envoi de modèle ainsi que procédé et appareil de réception de modèle
WO2025123302A1 (fr) * 2023-12-14 2025-06-19 Oppo广东移动通信有限公司 Procédé et appareil de transmission de données, et dispositif et support de stockage

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