WO2017078185A1 - Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant - Google Patents

Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant Download PDF

Info

Publication number
WO2017078185A1
WO2017078185A1 PCT/KR2015/011617 KR2015011617W WO2017078185A1 WO 2017078185 A1 WO2017078185 A1 WO 2017078185A1 KR 2015011617 W KR2015011617 W KR 2015011617W WO 2017078185 A1 WO2017078185 A1 WO 2017078185A1
Authority
WO
WIPO (PCT)
Prior art keywords
pusch
terminal
cyclic shift
shift value
transmission
Prior art date
Application number
PCT/KR2015/011617
Other languages
English (en)
Korean (ko)
Inventor
이상림
고현수
이호재
노광석
김동규
Original Assignee
엘지전자 주식회사
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.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2015/011617 priority Critical patent/WO2017078185A1/fr
Publication of WO2017078185A1 publication Critical patent/WO2017078185A1/fr

Links

Images

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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for performing connectionless based transmission in a wireless communication system.
  • Massive Machine Type Communications which maintains a massive connection and transmits short packets intermittently, is being considered.
  • Massive MTC service has very high Connection Density Requirement, while Data Rate and End-to-End (E2E) Latency Requirement are very free (Connection Density: Up to 200,000 / km2, E2E Latency: Seconds to hours, DL / UL Data) Rate: typically 1-100 kbps).
  • An object of the present invention is to provide a communication method of a terminal for performing connectionless based transmission in a wireless communication system.
  • Another object of the present invention is to provide a communication method of a base station for performing connectionless based transmission in a wireless communication system.
  • Another object of the present invention is to provide a terminal for performing connectionless based transmission in a wireless communication system.
  • Another object of the present invention is to provide a base station for performing connectionless based transmission in a wireless communication system.
  • a communication method of a terminal performing connectionless based transmission in a wireless communication system includes a physical resource block (PRB) and a DMRS (Physical Uplink Shared CHannel) for PUSCH transmission; Demodulation Reference Signal) determining a cyclic shift value; Transmitting the PUSCH to a base station based on the determined PRB and DMRS cyclic shift value; Randomly determining a DMRS cyclic shift value when receiving a NACK signal for the PUSCH from the base station; And retransmitting the PUSCH based on the re-determined DMRS cyclic shift value.
  • the NACK signal may be transmitted when the PUSCH of the UE and the PUSCH of the other UE are transmitted on the same time and frequency resource based on the same DMRS cyclic shift value, or when the PUSCH of the UE is not received.
  • the method further includes receiving information about a time and frequency domain for the connectionless based transmission, wherein the determined PRB is included in the time and frequency domain.
  • the method includes receiving random access preamble index information for the connectionless transmission; And performing a random access procedure based on the random access preamble index information.
  • a communication method of a base station for performing connectionless based transmission in a wireless communication system includes a PUSCH (Physical Uplink) based on a determined physical resource block (PRB) and a DMRS cyclic shift value Receiving a shared channel from a terminal; Transmitting a negative ACKnowledgement (NACK) signal for the PUSCH to the terminal; And re-receiving the PUSCH applied to the re-determined DMRS cyclic shift value as a response to the NACK from the terminal, wherein the determined PRB and DMRS cyclic shift value are determined by the terminal, and the re-determined DMRS cyclic shift
  • the transition value may be randomly re-determined by the terminal.
  • the NACK signal may be transmitted when the PUSCH of the UE and the PUSCH of the other UE are transmitted on the same time and frequency resource based on the same DMRS cyclic shift value, or when the PUSCH of the UE is not received.
  • the method further includes transmitting information on a time and frequency domain for the connectionless transmission, wherein the determined PRB is included in the time and frequency domain.
  • the method includes transmitting random access preamble index information for the connectionless transmission; And performing a random access procedure based on the random access preamble index information.
  • a terminal performing connectionless based transmission in a wireless communication system includes a physical resource block (PRB) and a demodulation reference (DMRS) for physical uplink shared channel (PUSCH) transmission.
  • PRB physical resource block
  • DMRS demodulation reference
  • Signal a processor configured to determine a cyclic shift value;
  • a transmitter configured to transmit the PUSCH to a base station based on the determined PRB and DMRS cyclic shift value;
  • a receiver configured to receive a NACK (Negative ACKnowledgement) signal for the PUSCH from the base station, wherein the processor is configured to randomly re-determine a DMRS cyclic shift value when the receiver receives the NACK. May be configured to retransmit the PUSCH based on the re-determined DMRS cyclic shift value.
  • NACK Negative ACKnowledgement
  • a base station performing connectionless based transmission in a wireless communication system includes a physical uplink shared channel (PUSCH) based on a determined physical resource block (PRB) and a DMRS cyclic shift value.
  • a receiver configured to receive a) from the terminal; And a transmitter configured to transmit a negative acknowledgment (NACK) signal for the PUSCH to the terminal, wherein the receiver is configured to re-receive the PUSCH applied to the DMRS cyclic shift value determined as a response to the NACK from the terminal.
  • the determined PRB and DMRS cyclic shift value may be determined by the terminal, and the re-determined DMRS cyclic shift value may be randomly re-determined by the terminal.
  • a zone allocation and HARQ scheme for uplink connectionless data transmission of a massive terminal is newly proposed to reduce overhead of a base station and efficiently support connectionless transmission of massive terminals.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • 2 is an uplink access method of a 3GPP LTE / LTE-A communication system.
  • FIG. 3 is a diagram exemplarily illustrating a connection / connectionless zone allocation for supporting both a connection transmission scheme and a connectionless transmission scheme according to the present invention.
  • FIG. 4 is a diagram illustrating a procedure of allocating a connection-based zone.
  • 5 is a diagram illustrating a procedure of allocating to a connectionless zone.
  • FIG. 6 is a diagram illustrating an example of connectionless transmission as an embodiment of a method of randomly selecting and transmitting a DMRS cyclic shift value when receiving a NACK.
  • a terminal collectively refers to a mobile or fixed user terminal device such as a user equipment (UE), a mobile station (MS), an advanced mobile station (AMS), and the like.
  • the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a Base Station, and an Access Point (AP).
  • UE user equipment
  • MS mobile station
  • AMS advanced mobile station
  • AP Access Point
  • a terminal or a user equipment may receive information from a base station through downlink, and the terminal may also transmit information through uplink.
  • the information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) employs OFDMA in downlink and SC-FDMA in uplink as part of Evolved UMTS (E-UMTS) using E-UTRA.
  • LTE-A Advanced is an evolution of 3GPP LTE.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • the wireless communication system 100 may include one or more base stations and / or one or more base stations. It may include a terminal.
  • the base station 105 includes a transmit (Tx) data processor 115, a symbol modulator 120, a transmitter 125, a transmit / receive antenna 130, a processor 180, a memory 185, and a receiver ( 190, a symbol demodulator 195, and a receive data processor 197.
  • the terminal 110 transmits (Tx) the data processor 165, the symbol modulator 170, the transmitter 175, the transmit / receive antenna 135, the processor 155, the memory 160, the receiver 140, and the symbol. It may include a demodulator 155 and a receive data processor 150.
  • the base station 105 and the terminal 110 are provided with a plurality of transmit and receive antennas. Accordingly, the base station 105 and the terminal 110 according to the present invention support a multiple input multiple output (MIMO) system. In addition, the base station 105 according to the present invention may support both a single user-MIMO (SU-MIMO) and a multi-user-MIMO (MU-MIMO) scheme.
  • MIMO multiple input multiple output
  • SU-MIMO single user-MIMO
  • MU-MIMO multi-user-MIMO
  • the transmit data processor 115 receives the traffic data, formats the received traffic data, codes it, interleaves and modulates (or symbol maps) the coded traffic data, and modulates the symbols ("data"). Symbols ").
  • the symbol modulator 120 receives and processes these data symbols and pilot symbols to provide a stream of symbols.
  • the symbol modulator 120 multiplexes the data and pilot symbols and sends it to the transmitter 125.
  • each transmission symbol may be a data symbol, a pilot symbol, or a signal value of zero.
  • pilot symbols may be sent continuously.
  • the pilot symbols may be frequency division multiplexed (FDM), orthogonal frequency division multiplexed (OFDM), time division multiplexed (TDM), or code division multiplexed (CDM) symbols.
  • Transmitter 125 receives the stream of symbols and converts it into one or more analog signals, and further adjusts (eg, amplifies, filters, and frequency upconverts) the analog signals to provide a wireless channel. Generates a downlink signal suitable for transmission via the transmission antenna 130, the transmission antenna 130 transmits the generated downlink signal to the terminal.
  • the receiving antenna 135 receives the downlink signal from the base station and provides the received signal to the receiver 140.
  • Receiver 140 adjusts the received signal (eg, filtering, amplifying, and frequency downconverting), and digitizes the adjusted signal to obtain samples.
  • the symbol demodulator 145 demodulates the received pilot symbols and provides them to the processor 155 for channel estimation.
  • the symbol demodulator 145 also receives a frequency response estimate for the downlink from the processor 155 and performs data demodulation on the received data symbols to obtain a data symbol estimate (which is an estimate of the transmitted data symbols). Obtain and provide data symbol estimates to a receive (Rx) data processor 150. Receive data processor 150 demodulates (ie, symbol de-maps), deinterleaves, and decodes the data symbol estimates to recover the transmitted traffic data.
  • the processing by symbol demodulator 145 and receiving data processor 150 is complementary to the processing by symbol modulator 120 and transmitting data processor 115 at base station 105, respectively.
  • the terminal 110 is on the uplink, and the transmit data processor 165 processes the traffic data to provide data symbols.
  • the symbol modulator 170 may receive and multiplex data symbols, perform modulation, and provide a stream of symbols to the transmitter 175.
  • the transmitter 175 receives and processes a stream of symbols to generate an uplink signal.
  • the transmit antenna 135 transmits the generated uplink signal to the base station 105.
  • an uplink signal is received from the terminal 110 through the reception antenna 130, and the receiver 190 processes the received uplink signal to obtain samples.
  • the symbol demodulator 195 then processes these samples to provide received pilot symbols and data symbol estimates for the uplink.
  • the received data processor 197 processes the data symbol estimates to recover the traffic data transmitted from the terminal 110.
  • Processors 155 and 180 of the terminal 110 and the base station 105 respectively instruct (eg, control, coordinate, manage, etc.) operations at the terminal 110 and the base station 105, respectively.
  • Respective processors 155 and 180 may be connected to memory units 160 and 185 that store program codes and data.
  • the memory 160, 185 is coupled to the processor 180 to store the operating system, applications, and general files.
  • the processors 155 and 180 may also be referred to as controllers, microcontrollers, microprocessors, microcomputers, or the like.
  • the processors 155 and 180 may be implemented by hardware or firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs Field programmable gate arrays
  • the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention.
  • the firmware or software configured to be may be provided in the processors 155 and 180 or stored in the memory 160 and 185 to be driven by the processors 155 and 180.
  • the layers of the air interface protocol between the terminal and the base station between the wireless communication system (network) are based on the lower three layers of the open system interconnection (OSI) model, which is well known in the communication system. ), And the third layer L3.
  • the physical layer belongs to the first layer and provides an information transmission service through a physical channel.
  • a Radio Resource Control (RRC) layer belongs to the third layer and provides control radio resources between the UE and the network.
  • the terminal and the base station may exchange RRC messages through the wireless communication network and the RRC layer.
  • the processor 155 of the terminal and the processor 180 of the base station process the signals and data, except for the function of receiving or transmitting the signal and the storage function of the terminal 110 and the base station 105, respectively.
  • the following description does not specifically refer to the processors 155 and 180.
  • the processors 155 and 180 it may be said that a series of operations such as a function of receiving or transmitting a signal and a data processing other than a storage function are performed.
  • connection less data transmission for supporting a massive device terminal.
  • 2 is an uplink access method of a 3GPP LTE / LTE-A communication system.
  • a connection-based transmission method is supported, and in order to support connectivity transmission, the terminal first requests connectivity transmission from a base station through a random access channel (RACH) procedure.
  • RACH random access channel
  • 2 shows an RACH performing procedure of a terminal.
  • the terminal when a terminal (MS) transmits a random access (RA) preamble to a base station, the base station transmits a RA response to the terminal in response.
  • the RA response may include Timing Advance, UL grant, and temp C-RNTI.
  • the terminal may perform a radio resource control (RRC) connection setup process with the base station (transmit the RRC connection request message and receive the RRC connection setup message) and then perform data communication with the base station.
  • RRC radio resource control
  • the base station can increase the number of terminals that can be accommodated in the system by allocating a new frequency domain in the case of a terminal that performs connectionless transmission.
  • the connectionless transmission refers to a transmission scheme in which data is initially transmitted to a base station without receiving an R preamble transmission and an RA response (message) and then undergoing an RRC connection process. In this case, there is no need to manage RRC context separately in the network.
  • the present invention newly defines system information for supporting the connectionless transmission method between the base station and the terminal, and proposes a procedure for controlling the operation of the connectionless connection method and the connection method according to the new access procedure based on the information.
  • the base station may consider operating time-frequency resources as shown in FIG. 3 to support both connected and disconnected schemes.
  • FIG. 3 is a diagram exemplarily illustrating a connection / connectionless zone allocation for supporting both a connection transmission scheme and a connectionless transmission scheme according to the present invention.
  • connection based transmission zone the RACH may be allocated to an existing RACH zone and an additional RACH zone may be allocated thereto to reduce the collision probability.
  • a connectionless transmission zone for connectionless transmission may be allocated to distinguish a connection-based transmission zone from a time resource or a frequency resource.
  • connection-based transmission zones and connectionless-based transmission zones are classified by frequency division multiplexing (FDM).
  • the terminal may transmit the following information to the terminal through physical broadcast channel (PBCH), higher layer signaling, and the like.
  • PBCH physical broadcast channel
  • time-frequency domain for connectionless transmission is a field indicating an area divided further by time-frequency domain in the connectionless transmission zone as shown in FIG. 3. Information about the region may be previously determined in a table.
  • RA Preamble index for non-connectable UE it means a new RA Preamble allocation index for UEs that can be additionally connected in addition to the existing RA Preamble.
  • time to maintain connectionless transmission is a time interval in which a terminal sending data in a connectionless transmission zone can retry in connection transmission mode after a certain time, and must maintain connectionless transmission. It means the minimum time.
  • the existing terminal After the terminal reads the broadcasted information as described in (1), (2) and (3), the existing terminal performs the procedure in the existing connection transmission scheme.
  • a new terminal capable of both connection and connectionless transmission transmits the RA preamble to the base station using the new RA preamble received by the system information or the RRC signal, and the base station determines whether to allocate to the connectionless transmission area according to the current overhead state. Done.
  • a specific UE and BS access procedure is as shown in FIG. 4.
  • FIG. 4 is a diagram illustrating a procedure of allocating a connection-based zone.
  • 5 is a diagram illustrating a procedure of allocating to a connectionless zone.
  • a terminal supporting both connectionless and connection-based transmission selects one of the RA preambles allocated for connectionless transmission and transmits the RA preamble to the base station. send.
  • the base station may determine whether to allocate to the terminal as an unconnected transmission zone based on the overhead (for example, the number of active terminals) at the current base station.
  • the RRC connection request is transmitted to the base station using the uplink resource and behaves in the same manner as in the conventional operation (see FIG. 3).
  • FIG. 4 illustrates a procedure of allocating a terminal capable of connectionless transmission to a connectionless zone because the overhead of the base station is severe.
  • the UE transmits a packet data packet to the base station to allocate a connectionless transmission zone, and at this time, a zone index indicating which time-frequency domain corresponds to the connectionless transmission zone. It can inform the terminal through.
  • the zone index is an index indicating a corresponding time-frequency domain according to a predefined table in the time-frequency domain for (1) unconnected transmission transmitted by the base station.
  • the terminal may directly transmit data to the base station without performing the RRC connection establishment procedure through the time-frequency domain for the unconnected transmission corresponding to the zone index.
  • the base station can enable the acceptance of a large number of terminals by checking the overhead state of the current base station and allocating a new time-frequency region according to whether the terminal can be connected without connection.
  • the present invention proposes a scheme for allocating frequency resources in a situation where existing terminals and terminals supporting a new transmission scheme coexist in a system for supporting a massive connection.
  • Table 1 shows uplink HARQ contents in 3GPP LTE system.
  • Uplink HARQ operation scheme in the current LTE system operates synchronously.
  • the UE transmits data through a data channel (for example, a physical uplink shared channel (PUSCH)) after 4 subframes, that is, at subframe n + 4, from a time point of receiving a UL grant from a base station (subframe n).
  • the ACK / NACK for the transmitted data is received from the base station through the PHICH in a subframe after 4 subframes (that is, subframe n + 8). If the base station receives the NACK, data is retransmitted after 4 subframes, that is, in a subframe corresponding to subframe n + 12.
  • the UE should know the information on the resource location and multiplexing in the PHICH ACK / NACK for its uplink data.
  • the PHICH resource information of the ACK / NACK for the uplink data is the lowest physical resource block (PRB) index and the demodulation reference signal (DMRS) in the first slot of the corresponding PUSCH transmission according to the UL grant determined by the base station as shown in Table 1 above. It is determined by cyclic shift.
  • PRB physical resource block
  • DMRS demodulation reference signal
  • connectionless transmission contention is allocated based on a UL grant, and contention-based transmission is performed rather than transmission.
  • the UE determines a resource to be transmitted and a DMRS cyclic shift value. Therefore, when determining the location and multiplexing method of the PHICH based on the lowest PRB index and DMRS cyclic shift in the first slot of the corresponding PUSCH transmission according to the conventional method, another UE using the transmission of the connection method Resources may collide with each other in the PHICH. Therefore, there is a need for a new technique of PHICH resource allocation and multiplexing.
  • the code for the location and multiplexing of the PHICH is determined by the lowest index value and the DMRS cyclic shift value of the PRB.
  • the PRB and DMRS cyclic shift values for transmitting the PUSCH are determined by the terminal, not the base station.
  • a collision may occur if the PHICH is allocated in the current manner.
  • the existing LTE scheme allocates the same PRB to different terminals, but multiplexes by setting different DMRS cyclic shift values, and the terminals are multiplexed due to differences in DMRS cyclic shift values.
  • the ACK / NACK of the PHICH can be decoded.
  • various UEs may determine an ACK / NACK in a PHICH at the same location. Solutions for solving this problem are described in the following embodiments.
  • a method to prevent a collision when a collision occurs while maintaining an existing PHICH allocation method For example, if two UEs transmit data (eg, PUSCH) on the same time-frequency resource and the same DMRS cyclic shift value is used, the received base station decodes data of each UE. DMRS and data of each terminal may be divided into an orthogonal code domain, and the used code may be indicated before the data through a preamble.) Then, the ACK / NACK is transmitted to the terminal. When you lower it to the same resource, it uses the same code. Therefore, whether ACK / NACK of the two terminals are not distinguished from each other and it is not known which terminal is ACK / NACK. As a result, two terminals may receive an ACK even if they are not actual ACKs and receive NACKs even if they are not NACKs.
  • PUSCH Physical Uplink Control Channel
  • the base station gives an ACK to the same position only when the terminals using the same DMRS cyclic shift value for the same time-frequency resources are both ACK, NACK for any one of them Send.
  • NACK may have occurred due to poor link performance.
  • the BS may transmit NACK.
  • PUSCH can be transmitted using a new DMRS cyclic shift value different from the one used. If the same DMRS is used for the next transmission, the same phenomenon may continue to occur. Accordingly, resource collision of the PHICH can be reduced by randomly selecting and using a DMRS cyclic shift value.
  • the base station and the terminal using the preamble To determine the location of ACK / NACK and the code used
  • This method is a method of reducing PHICH resource collision by replacing a new key parameter, unlike a method of randomly selecting and transmitting a DMRS cyclic shift value when receiving the NACK described above.
  • a preamble is used instead of the DMRS cyclic shift value among the lowest PRB index and the DMRS cyclic shift value of the first slot of the existing two parameters corresponding to the PUSCH transmission.
  • Table 2 below shows a Cyclic shift field value of Downlink Control Information (DCI) format 0.
  • DCI Downlink Control Information
  • the DMRS cyclic shift value is currently assigned in the form of 3 bits.
  • a method using a preamble may be used. That is, collision probability can be reduced by allocating a preamble sequence type sufficiently (for example, 32 sequences) or by applying a unique code to the preamble.
  • a preamble sequence type sufficiently (for example, 32 sequences) or by applying a unique code to the preamble.
  • a preamble is transmitted before the data in the process of sending data. By assigning a random sequence to this preamble, a key for the corresponding data can be associated.
  • FIG. 6 is a diagram illustrating an example of connectionless transmission as an embodiment of a method of randomly selecting and transmitting a DMRS cyclic shift value when receiving a NACK.
  • each terminal arbitrarily determines and transmits a DMRS cyclic shift value, when transmitting with the same value, even if reception is possible at the base station, two terminals decode ACK / NACK of the same PHICH, which causes a problem. Therefore, by additionally transmitting a random value to the preamble, even if two users transmit the same DMRS cyclic shift value, ACK / NACK allocation of PHICHs orthogonal to each other based on the preamble value is possible.
  • data between terminals can be distinguished at the base station. For example, the classification may be performed through a code domain or a spatial domain.
  • the base station and the terminal using the preamble before the data To determine the location of ACK / NACK and the code used
  • the base station and the terminal described above using a preamble Unlike the method of determining the location of the ACK / NACK and the code used based on the above, the existing DMRS cyclic shift value is used and the value of the preamble is additionally used.
  • the collision probability of the PHICH can be reduced by using a random value of the preamble and a conventional DMRS cyclic shift value.
  • the base station and the terminal by using a preamble in front of the data Compared to the method of determining the location of the ACK / NACK and the code used, the probability of collision can be reduced even if fewer Preamble sequences are used.
  • a HARQ scheme for a connectionless transmission scheme is proposed.
  • the ACK / NACK location and code of the PHICH is determined based on the values according to the resource allocation of the base station, while determining the location of the ACK / NACK in a new connectionless transmission method (transmission without UL grant)
  • each component or feature is to be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
  • Method for performing connectionless based transmission according to the present invention and apparatus for the same can be used industrially in various wireless communication systems.

Landscapes

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

Abstract

L'invention concerne un procédé de communication d'une station mobile qui effectue une transmission en mode sans connexion dans un système de communication sans fil, ce procédé pouvant comprendre les étapes consistant à : déterminer un PRB et une valeur de décalage cyclique de DMRS pour la transmission d'un PUSCH ; transmettre le PUSCH à une station de base sur la base du PRB déterminé et de la valeur de décalage cyclique de DMRS ; redéterminer de manière aléatoire une valeur de décalage cyclique de DMRS lorsqu'un signal d'accusé de réception négatif (NACK) pour le PUSCH est reçu à partir de la station de base ; et retransmettre le PUSCH sur la base de la valeur de décalage cyclique de DMRS redéterminée.
PCT/KR2015/011617 2015-11-02 2015-11-02 Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant WO2017078185A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/011617 WO2017078185A1 (fr) 2015-11-02 2015-11-02 Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/011617 WO2017078185A1 (fr) 2015-11-02 2015-11-02 Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant

Publications (1)

Publication Number Publication Date
WO2017078185A1 true WO2017078185A1 (fr) 2017-05-11

Family

ID=58662072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2015/011617 WO2017078185A1 (fr) 2015-11-02 2015-11-02 Procédé d'exécution de transmission en mode sans connexion, dans un système de communication sans fil, et appareil correspondant

Country Status (1)

Country Link
WO (1) WO2017078185A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019022314A1 (fr) * 2017-07-28 2019-01-31 삼성전자주식회사 Procédé permettant de réaliser une procédure de canal rach entre un terminal et une station de base, ainsi que station de base et terminal s'y rapportant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050766A2 (fr) * 2008-10-31 2010-05-06 엘지전자주식회사 Procédé et appareil permettant d’effectuer un procédé de demande de répétition automatique hybride (harq) dans un système de communications sans fil
US20110205996A1 (en) * 2008-10-30 2011-08-25 Ki Hwan Kim Method of harq acknowledgement transmission and transport block retransmission in a wireless communication system
US20110249632A1 (en) * 2010-04-07 2011-10-13 Erik Eriksson Scheduling Retransmissions for Contention-Based Access
KR20120005935A (ko) * 2010-07-09 2012-01-17 엘지전자 주식회사 다중 안테나 무선 통신 시스템에서 상향링크 참조 신호 송신 방법 및 이를 위한 장치
US20130148593A1 (en) * 2010-05-27 2013-06-13 Shoichi Suzuki Mobile station apparatus, base station apparatus, radio communication system, radio communication method, and integrated circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110205996A1 (en) * 2008-10-30 2011-08-25 Ki Hwan Kim Method of harq acknowledgement transmission and transport block retransmission in a wireless communication system
WO2010050766A2 (fr) * 2008-10-31 2010-05-06 엘지전자주식회사 Procédé et appareil permettant d’effectuer un procédé de demande de répétition automatique hybride (harq) dans un système de communications sans fil
US20110249632A1 (en) * 2010-04-07 2011-10-13 Erik Eriksson Scheduling Retransmissions for Contention-Based Access
US20130148593A1 (en) * 2010-05-27 2013-06-13 Shoichi Suzuki Mobile station apparatus, base station apparatus, radio communication system, radio communication method, and integrated circuit
KR20120005935A (ko) * 2010-07-09 2012-01-17 엘지전자 주식회사 다중 안테나 무선 통신 시스템에서 상향링크 참조 신호 송신 방법 및 이를 위한 장치

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019022314A1 (fr) * 2017-07-28 2019-01-31 삼성전자주식회사 Procédé permettant de réaliser une procédure de canal rach entre un terminal et une station de base, ainsi que station de base et terminal s'y rapportant
KR20190012726A (ko) * 2017-07-28 2019-02-11 삼성전자주식회사 단말 및 기지국 간의 rach 절차 수행 방법 및 이를 위한 기지국 및 단말
CN110999497A (zh) * 2017-07-28 2020-04-10 三星电子株式会社 执行终端与基站之间的rach过程的方法及使用其的基站与终端
US11184932B2 (en) 2017-07-28 2021-11-23 Samsung Electronics Co., Ltd. Method for performing RACH procedure between terminal and base station, and base station and terminal therefor
KR102406365B1 (ko) * 2017-07-28 2022-06-08 삼성전자주식회사 단말 및 기지국 간의 rach 절차 수행 방법 및 이를 위한 기지국 및 단말
CN110999497B (zh) * 2017-07-28 2023-10-20 三星电子株式会社 执行终端与基站之间的rach过程的方法及使用其的基站与终端

Similar Documents

Publication Publication Date Title
WO2018066934A2 (fr) Procédé et appareil permettant d'exécuter une procédure d'accès aléatoire basée sur la contention
WO2018080151A1 (fr) Procédé permettant d'effectuer une demande de répétition automatique hybride (harq) pour une communication v2x dans un système de communication sans fil et appareil associé
WO2013115567A1 (fr) Procédé de transmission et de réception d'informations en retour sur des données de transmission d2d dans un système de communication sans fil pour prendre en charge une communication d2d et appareil associé
WO2018084382A1 (fr) Procédé pour transmission de demande de programmation dans un système de communication sans fil et terminal à cet effet
WO2018048273A1 (fr) Procédé de transmission de signal pour communication v2x dans un système de communication sans fil et dispositif pour cela
WO2010027175A2 (fr) Procede de demande de ressource radio dans un systeme de communication sans fil
WO2013043007A2 (fr) Procédé et appareil d'accès aléatoire dans un système de communication sans fil
WO2012134155A2 (fr) Procédé et dispositif pour accès aléatoire dans un système de communication mobile
WO2015156604A1 (fr) Procédé et appareil de transmission de données par un terminal de dispositif à dispositif dans un système de communication sans fil
WO2014168329A1 (fr) Procédé et dispositif permettant de transmettre des données de liaison montante lors de la prise en charge d'une planification multi sous-trame
WO2017155324A1 (fr) Procédé d'exécution d'une procédure d'accès aléatoire permettant une transmission à tonalité unique dans un système de communication sans fil et appareil associé
WO2011068358A2 (fr) Procédé et appareil d'émission-réception de données via un canal de données de liaison montante physique sur la base de collisions
WO2018164450A1 (fr) Procédé d'attribution de ressource ack/nack dans un système de communication sans fil, et appareil associé
WO2017222351A1 (fr) Procédé de transmission de signal pour une communication v2x dans un système de communication sans fil, et dispositif associé
WO2016072685A2 (fr) Procédé de transmission en liaison montante dans une bande sans licence et dispositif utilisant ledit procédé
WO2017052251A1 (fr) Procédé et appareil pour transmettre des informations de commande de liaison montante (uci) dans un système de communication sans fil
WO2016056877A2 (fr) Procédé d'émission d'un signal de synchronisation d2d et terminal associé
WO2018093113A1 (fr) Procédé de transmission/réception de signal pour une communication v2x dans un système de communication sans fil, et dispositif correspondant
WO2018084331A1 (fr) Procédé de transmission d'une demande de connexion rrc, et terminal associé
WO2018101738A1 (fr) Procédé d'attribution de ressources destiné à une communication v2x dans un système de communication sans fil et dispositif associé
WO2011139120A2 (fr) Terminal adapté pour contrôler une puissance de transmission sur la liaison montante et procédé adapté pour contrôler une puissance de transmission sur la liaison montante dans un système de communication sans fil
WO2015050417A1 (fr) Procédé et appareil d'émission-réception de signal d'un terminal dispositif à dispositif dans un système de communication sans fil system
WO2013133607A1 (fr) Procédé de transmission de signal et équipement d'utilisateur, et procédé de réception de signal et station de base
WO2015005724A1 (fr) Procédé de communication et dispositif sans fil pour la prise en charge d'une bande passante variable
WO2016105125A1 (fr) Procédé de transmission en liaison montante dans une bande sans licence et dispositif utilisant ledit procédé

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15907848

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15907848

Country of ref document: EP

Kind code of ref document: A1