WO2014010858A1 - Procédé de communication de dispositif à dispositif et terminal associé - Google Patents

Procédé de communication de dispositif à dispositif et terminal associé Download PDF

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Publication number
WO2014010858A1
WO2014010858A1 PCT/KR2013/005833 KR2013005833W WO2014010858A1 WO 2014010858 A1 WO2014010858 A1 WO 2014010858A1 KR 2013005833 W KR2013005833 W KR 2013005833W WO 2014010858 A1 WO2014010858 A1 WO 2014010858A1
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pattern
terminal
patterns
subunits
communication
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PCT/KR2013/005833
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English (en)
Korean (ko)
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박경민
윤성준
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주식회사 팬택
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • the present invention relates to a method for a terminal to communicate with another terminal using an uplink radio resource or a part of an uplink radio resource, and a terminal thereof.
  • LTE Long Term Evolution
  • LTE-Advanced network a mobile communication network
  • D2D communication Device to Device communication
  • An object of the present invention is to provide a method and apparatus for reducing the complexity of a terminal sensing task compared to the amount of D2D communication resources and performing communication without interference between terminals or between D2D signals.
  • a method in which a terminal communicates with another terminal comprising: recognizing a radio resource available through carrier sensing; And using the available radio resource corresponding to the first D2D pattern consisting of L pattern subunits (L is a natural number of 1 or more) and F (F is a natural number of 1 or more), thereby identifying its existence. It provides a method of communication between terminals of the terminal sharing the terminal index information that can be notified.
  • Another embodiment of the present invention is a terminal for communicating with other terminals, which recognizes available radio resources through carrier sensing, and L (L is one or more natural numbers) pattern subunits and F (F)
  • the control unit for generating a D2D pattern consisting of patterns of one or more natural numbers; And a transmitter / receiver sharing terminal index information capable of informing its presence using the available radio resource corresponding to the D2D pattern.
  • the number F of the patterns and the number L of the pattern subunits are not equal to each other, or the number F of the patterns and the number L of the pattern subunits are the same, but not a prime number or the number F of the patterns and the pattern subunits
  • the number F of the patterns and P are set and the following equation is used to form the number P of the pattern subunits and the number P of the patterns.
  • d_ (p, n) means the time axis to which the pattern p is mapped in the pattern subunit n.
  • FIG. 1 illustrates an example of a wireless communication system in which a terminal communicates with a base station.
  • FIG. 2 illustrates operation of each terminal required to perform D2D communication for performing distributed communication according to an embodiment.
  • FIG. 3 illustrates a D2D pattern for performing UE index sharing using a standardized pattern.
  • 5 illustrates an example of timing mismatch when each terminal is synchronized with respect to other uplink points.
  • FIG. 6 illustrates an example of overlapping phenomenon between D2D patterns due to timing mismatch when the pattern of FIG. 3 is used.
  • FIG. 7 illustrates terminals that are not mutually detectable according to a terminal sensing signal transmission resource.
  • FIG. 10 illustrates a terminal sensing signal D2D pattern considering interference between patterns due to timing mismatch.
  • FIG. 11 illustrates a D2D pattern supporting overlap in time of up to 'one transmission interval' size between patterns to improve spectral performance or capacity.
  • 16 illustrates frequency hopping of a D2D pattern according to another embodiment.
  • FIG. 17 is a conceptual diagram of a method of changing a pattern subunit order through reversal, movement scrambling, and the like between pattern subunits of a D2D pattern according to another embodiment.
  • 18 is a conceptual diagram of a method of generating a plurality of patterns on the same frequency according to another embodiment.
  • D2D communication distributed communication
  • 21 is a block diagram illustrating a configuration of a terminal according to another embodiment.
  • 22 is a block diagram showing a configuration of a base station according to another embodiment.
  • FIG. 1 illustrates an example of a wireless communication system in which a terminal communicates with a base station.
  • a wireless communication system includes a user equipment (UE) 10 and a base station (BS) 20 that performs uplink and downlink communication with the terminal 10.
  • UE user equipment
  • BS base station
  • the terminal 10 is a comprehensive concept of a terminal in wireless communication.
  • a user station (UE) in WCDMA, LTE, HSPA, etc. as well as a mobile station (MS) and user terminal (UT) in GSM It should be interpreted as a concept including a subscriber station (SS), a wireless device, and the like.
  • SS subscriber station
  • the base station 20 may generally be a station communicating with the terminal 10, and may be a Node-B, an evolved Node-B, an Sector, a Site, or a BTS. It may be called in other terms such as a base transceiver system, an access point, a relay node, and a radio resource head (RRH).
  • a base transceiver system an access point, a relay node, and a radio resource head (RRH).
  • RRH radio resource head
  • the base station 20 is meant to encompass all of the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, radio resource head (RRH) and relay node communication range.
  • RRH radio resource head
  • D2D communication refers to a communication between the UE (User Equipments) in the same cell or adjacent cells to establish a D2D link between each other and directly send and receive data through the D2D link without passing through the base station.
  • the wireless communication system will be described as an LTE communication system by way of example, but the present invention is not limited thereto and may be applied to any wireless communication system.
  • each terminal In order to establish direct communication between terminals, the location information of each terminal (information on which point in the network is connected) must be shared, and the base station or the central control unit communicates directly between the terminals using the location information of each terminal. Let this be done.
  • each terminal a terminal capable of transmitting or receiving
  • each terminal may provide information about terminals located within a call range capable of D2D communication. It is necessary to determine whether the D2D communication object exists by collecting the information in advance, and when transmitting D2D communication, information on who the other terminal intends to transmit (transmit) should be separately transmitted to the other terminal.
  • the mutual security code may be shared in advance before the D2D communication is performed.
  • the network configures more than a certain level of 'D2D communication resources' and prevents collisions between D2D communication resources.
  • the terminal performs carrier sensing as appropriate.
  • the network can reduce the complexity of the terminal sensing by configuring D2D communication resources into a plurality of D2D signal patterns and allowing each terminal to perform a sensing operation on the D2D signal pattern.
  • An embodiment of the present invention provides a D2D pattern for performing communication without interference between terminals or between D2D signals in a D2D communication in which each terminal performs D2D communication resources search and transmission.
  • UE 0 distinguishes between a D2D pattern being used by other UEs among D2D resource regions preset through carrier sensing and an unused D2D pattern.
  • the UE 0 selects a D2D radio resource corresponding to an unused D2D pattern and shares index information of the UE 0 through the selected D2D resource.
  • UE 0 may share index information of respective UEs through D2D radio resources corresponding to their D2D patterns. For example, UE 0 may receive a signal including the index information of broadcasted UE 1, and by decoding the received signal, UE 0 may recognize the D2D pattern that UE 1 is using.
  • D2D communication which supports direct communication between user terminals using uplink radio resources of a wireless communication system, includes centralized communication in which a base station manages scheduling such as resource allocation and distributed communication without base station control. It can be divided into a hybrid type (hybrid type) and the like combined.
  • a hybrid type hybrid type
  • an operation of each UE of D2D communication for performing distributed communication with reference to FIG. 2 will be described, and D2D patterns used for UE recognition and UE index sharing will be described with reference to FIGS. 3 to 18, and FIGS. 19 and 20.
  • the centralized communication and the distributed communication for performing D2D communication using the D2D pattern will be described respectively.
  • each terminal 12, 14, and 16 corresponds to the terminal 10 of FIG. 1.
  • each of the terminals 12, 14, and 16 recognizes a radio resource available through carrier sensing.
  • each of the terminals 12, 14, and 16 may use the uplink radio resource or a part of the uplink radio resource of the existing mobile communication network to provide terminal index information that may inform its existence. Send it out.
  • each of the terminals 12, 14, and 16 may distinguish between the D2D pattern being used by the terminals and the unused D2D pattern in the preset D2D resource region through carrier sensing.
  • a process of transmitting terminal index information for notifying the existence of each terminal 12, 14, 16 and collecting terminal index information of neighboring D2D terminals is called terminal index sharing. That is, each of the terminals 12, 14, and 16 selects a D2D resource corresponding to an unused D2D pattern, maps index information of each terminal through the selected D2D resource, and shares the mapped signal (broadcasts). do.
  • the other terminals 14 and 16 may share index information of each terminal through D2D radio resources corresponding to their D2D patterns.
  • the terminal 12 receives a signal including index information of the broadcasted terminal 14 through a D2D radio resource corresponding to its D2D pattern.
  • the terminal 12 may decode the index information of the received terminal 14.
  • the terminal 12 when the terminal 12 has a target to which information transmission is performed among the neighboring D2D terminals 14 and 16 recognized through the above-described steps, the terminal 12 may be, for example, a terminal ( 14) transmits its own terminal index and information (which may also include control information).
  • the terminal 14 receiving the control information and / or data receives the closed loop control information and / or N / Ack based on the received signal. Can be delivered to. Meanwhile, the step according to (d) of FIG. 2 may be omitted.
  • UE index sharing should be protected from interference due to a UE performing centralized uplink communication, for example, cellular communication, communication through a separate radio resource should be performed.
  • the terminal in order to perform D2D communication, (a) the terminal should identify the location of the radio resource to which the D2D signal transmitted by another terminal is mapped without the BS's instruction, and (b) recognize the UE and the D2D information that transmitted the D2D signal. do. In order for each UE to perform D2D transmission, the UE should recognize the available D2D radio resource and transmit D2D information and its identity information using this radio resource.
  • the system divides a radio resource that can be used for D2D communication into a finite number of D2D resource blocks (b) and each terminal determines whether to use each resource block. (C) If the resource block is in use, it determines whether the necessary information is loaded. (D) If the resource block is not used, D2D communication is performed by using the resource block.
  • a multiplexing method for supporting D2D communication to multiple terminals should be considered, and various such as FDM / TDM (frequency domain (division) multiplexing / time domain (division) multiplexing) Multiplexing of schemes can be considered.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • PAPR Peak to Average Power Ratio
  • SC-FDMA Single carrier frequency
  • a plurality of D2D patterns may be designed in an FDM scheme in the same time interval.
  • each terminal cannot receive D2D signals of other terminals received in the same time zone when transmitting the D2D signal.
  • the same band refers to a radio resource or a set of resources located close to frequencies so that the RF circuit of the UE cannot simultaneously transmit and receive.
  • communication is performed using the LTE uplink band, which means that a plurality of terminals perform D2D communication on the same band when operating in an LTE uplink single carrier environment. Therefore, each terminal transmitting the D2D signal cannot recognize the D2D signal of another terminal in the time domain for transmitting the signal.
  • the D2D pattern should be designed in a narrow band, which limits the amount of radio resources available for D2D communication. Therefore, it is necessary to design a D2D pattern in which TDM and FDM are properly mixed.
  • FIG. 3 illustrates a D2D pattern for performing UE index sharing using a standardized pattern.
  • radio resources are allocated to the D2D UE index sharing in the D2D pattern 300.
  • each of the terminals 12, 14, and 16 selects available radio resources among them through carrier sensing and uses the same for transmitting the terminal index.
  • One radio resource shown in FIG. 3 may be one resource element in an LTE subframe or a bundle of resource elements in time-frequency.
  • a smaller number of D2D patterns 300 are formed using the nine radio resources, and each pattern Through carrier sensing, a resource pattern to be used for the UE index transmission may be selected.
  • each terminal detects and selects resources to be used for D2D communication.
  • the method selects a resource pattern and selects a resource pattern through all the radio resources included in the pattern according to the amount of radio resources to be transmitted. Alternatively, some may be used to perform D2D communication.
  • each terminal 12, 14, and 16 sets a separate TA (Timing Alignment) value for synchronization, and a TA value suitable for an uplink propagation delay.
  • TA Timing Alignment
  • D2D communication will operate without a separate synchronization signal.
  • Each terminal 12, 14 and 16 performs D2D signal transmission in synchronization with LTE uplink transmission.
  • there is no synchronization between the D2D signals of the terminals 12, 14, and 16 there is a timing misalignment between the D2D signals transmitted by the terminals 12, 14, and 16. This results in overlapping between patterns.
  • FIG. 4 illustrates an example of D2D timing mismatch occurring between UEs synchronized to LTE uplink transmission with respect to the same cell.
  • FIG. 5 illustrates timing mismatch when each UE is synchronized with respect to other uplink points. It is an example. 6 illustrates an example of overlapping phenomenon between D2D patterns due to timing mismatch when the pattern of FIG. 3 is used.
  • each terminal 12, 14, and 16 since the D2D signals of the terminals 12, 14, and 16 which are synchronized with respect to uplink of LTE or other cellular communication are not synchronized, each terminal 12, 14, and 16 transmits. Timing mismatch occurs between the D2D signals.
  • timing mismatch can be a serious problem.
  • timing mismatch may occur in a range of 1 symbol duration or less.
  • timing mismatch between D2D terminals may be larger than several subframes.
  • timing mismatches as shown in FIG. 6 may occur.
  • the terminal 12 and the terminal 14 transmit their D2D signals. It is not possible to receive the D2D signal transmitted by the other terminal during. In other words, in this situation, the terminal 12 and the terminal 14 operate like a half duplex TDD scheme.
  • FIG. 7 illustrates terminals that are not mutually detectable according to a terminal sensing signal transmission resource.
  • a plurality of D2D patterns divided in both frequency domain and time domain can be designed and each of these D2D patterns can be utilized as a resource block.
  • a plurality of D2D patterns are repeated at regular intervals, and each terminal determines whether the patterns can be used for each pattern through carrier sensing. If there is a D2D pattern that is determined not to be used as a result of carrier sensing, the D2D signal is transmitted using the D2D pattern.
  • the number of D2D terminals that can be simultaneously connected is determined according to the number of D2D patterns that are set.
  • a system operating with contention-based access may support a smooth access of the UE only when a large number of D2D patterns are defined.
  • the terminal sensing signal transmission pattern as shown in FIG. 8 may be used.
  • three D2D patterns having a length of 3 in a band available for D2D communication may be designed to be divided in both time / frequency domains.
  • the D2D pattern illustrated in (c) of FIG. 8 is an optimal pattern in which overlapping of patterns occurs only in a time domain corresponding to at most one transmission interval unit regardless of timing mismatch.
  • 8A is an arbitrary pattern in which three D2D patterns are divided in both time / frequency domains in a band usable for D2D communication.
  • FIG. 8B is a D2D pattern to which a Latin square pattern is applied.
  • this D2D pattern time-base overlap between the patterns occurs irregularly, so that randomization gain can be obtained.
  • FIG. 8C is an optimized pattern in which overlap between patterns does not exceed the size of one transmission section unit when overlapping between patterns occurs.
  • TMA timing mismatch
  • the terminal 12 and the terminal 14 there is more than a certain level of timing misalignment between the terminal 12 and the terminal 14.
  • the D2D signal transmitted by the terminal 12 and the D2D signal transmitted by the terminal 14 overlap in all transmission intervals, and the terminal 12 and the terminal 14 do not receive the counterpart D2D signal.
  • the timing mismatch problem shown in FIG. 9 occurs because the time difference between the D2D patterns is the same in each D2D pattern.
  • 9 (a) and 9 (b) are examples of a situation in which an overlap between patterns occurs due to timing mismatch between terminals when the patterns of FIGS. 8A and 8B are used.
  • FIG. 10 illustrates a terminal sensing signal D2D pattern considering interference between patterns due to timing mismatch.
  • the minimum unit in which the D2D signal can be transmitted in the D2D pattern is called a 'transmission interval unit'
  • the entire unit in which the D2D signal is transmitted is called a 'pattern unit'.
  • the D2D pattern considering the interference between patterns due to timing mismatch needs to be set such that a time difference between transmissions is different.
  • the pattern of FIG. 10B even if a timing mismatch occurs at a predetermined level or more, as shown in FIG. 10B, if an overlap occurs in a time of the maximum 'one transmission interval' size between the patterns, and the length of the D2D pattern is long enough The effects of the overlap can be overcome.
  • the D2D pattern is designed as shown in FIG. 10, the number of radio resources used for the D2D pattern design is further increased, which may cause spectral efficiency and reduced capacity.
  • FIG. 11 illustrates a D2D pattern supporting overlap in time of up to 'one transmission interval' size between patterns to improve spectral performance or capacity.
  • an overlap of a maximum 'one transmission interval' size occurs between D2D patterns regardless of the magnitude of timing mismatch, while the number of radio resources required to define a D2D pattern of the same length is reduced.
  • the D2D pattern performs one transmission in a pattern subunit 1230 consisting of M transmission interval units 1220 in one pattern unit 1210 and performs a total of L transmissions. Configured to perform.
  • the 'pattern subunit 1230' different F D2D patterns may be generated.
  • the transmission interval unit 1220 may be one resource element on the LTE subframe or a bundle of two or more resource elements, for example, 4 * 4 resource elements as shown in the lower part of FIG. 12. Can be.
  • a method of directly finding an optimal pattern may be used.
  • the optimal pattern is pattern overlapping once per L transmission interval units, which is a performance indicator, while pattern overlap occurs only in a time interval corresponding to the size of one transmission interval unit 1210 regardless of the timing mismatch size.
  • the following embodiments provide a D2D pattern that guarantees higher spectral performance by complementing the D2D pattern shown in FIG. 11.
  • the following embodiments show a sub-optimal performance that shows the same performance as the optimal pattern for various system parameters under various communication environments through a formalized technique, instead of generating an optimal pattern through confirmation according to a case as shown in FIG. 14.
  • d_ (f, n) Mod (nf, M)
  • d_ (f, n) means the time axis to which the pattern f is mapped in the pattern subunit n.
  • d_ (p, n) means a time axis to which the pattern p is mapped in the pattern subunit n.
  • P the smallest prime number larger than the number F of patterns and the number L of pattern subunits
  • a portion consisting of 14 pattern subunits is removed by removing some of the 17 pattern subunits constituting the pattern, and 7 patterns are selected to determine the final pattern.
  • the operation of selecting the pattern and the pattern subunit may be performed so as not to cause an overlap in timing mismatch of the timing mismatch, or the operation may be performed at random. For example, when there is no timing mismatch, the first pattern subunit, in which overlap between transmission units occurs, may be removed, and both end pattern subunits may be sequentially removed.
  • the final pattern may be selected by preferentially erasing the patterns causing overlap between the patterns for the small timing mismatch.
  • timing mismatch is fixed by using a method of preferentially removing the first pattern subunit and then removing both ends of the pattern subunit. Under less than one environment can generate patterns that do not overlap between patterns.
  • a method of generating a D2D pattern according to another exemplary embodiment described with reference to FIGS. 14 and 15 is expressed by the following equation.
  • the transmission time unit used by the f-th pattern in the l-th pattern subunit may be expressed as follows.
  • Time unit mod ((f + o) x (l + s), P)
  • o is the number of patterns that have an index that takes precedence over pattern f when F patterns are selected from the original pattern group
  • s is the number in front of the first pattern subunit when generating a pattern of length L in the original pattern group.
  • the number of pattern subunits removed. o and s may be different values for each f and l, and may have the same value for all f and l depending on the pattern generation method.
  • the transmission time unit used by the pattern f in each pattern subunit can be expressed as follows.
  • Time unit (mod ((f + o) x (l + s), P), L + mod ((f + o) x (l + s), P), 2L + mod ((f + o) x (l + s), P),... ⁇
  • the resources (k, s) to which the pattern f is mapped with respect to the pattern f can be expressed as follows.
  • k and l may be indexes of subcarriers and symbols, and may be indexes of a bundle of subcarriers or a bundle of symbols.
  • k (f) When k is an index of a set of subcarriers, k (f) may be expressed by one of the following two equations.
  • k (f) fN + F0 + o, fN + F0 + o + o1, ..., fN + F0 + o + (N-1)
  • k (f) fN + F0 + o + i, fN + F0 + o + i +1, ..., fN + F0 + o + j
  • I and j are parameters used to set a guard subcarrier between patterns.
  • s (f) may be expressed as follows.
  • s (f) ⁇ Jxmod ((f + o) x (l + s), P) + a, Jxmod ((f + o) x (l + s), P) + a + 1, .... , Jxmod ((f + o) x (l + s), P) + b, L + Jxmod ((f + o) x (l + s), P) + a, L + Jxmod ((f + o) x (l + s), P) + a + 1, ...., Jxmod ((f + o) x (l + s), P) + b,... . ⁇
  • 16 illustrates frequency hopping of a D2D pattern according to another embodiment.
  • the transmission section units of the second pattern subunit are frequency hopping.
  • the frequency domain factor may change in the above-described equations. That is, the position of the frequency domain of the radio resource to which the pattern f is mapped may be changed as follows.
  • k (f, l) q (l) N + F0 + o, q (l) N + F0 + o + 1, ..., q (l) N + F0 + o + (N-1)
  • k (f, l) q (l) N + F0 + o + i, q (l) N + F0 + o + i +1, ..., q (l) N + F0 + o + j
  • q (l) is a factor for the frequency hopping pattern corresponding to transmission interval unit l.
  • the time axis difference between patterns increases as the pattern subunit index increases, but the present invention is not limited thereto.
  • FIG. 17 is a conceptual diagram of a method of changing a pattern subunit order through reversal, movement scrambling, and the like between pattern subunits of a D2D pattern according to another embodiment.
  • each pattern subunit after designing each pattern subunit such that the differences in the time axis between the patterns are different, the pattern subunit order through reversing, shifting, scrambling, and the like between the pattern subunits. You can create a variety of patterns by changing the way.
  • the inversion, movement, and scrambling between the pattern subunits of the D2D pattern described with reference to FIG. 17 may be applied to any D2D pattern described with reference to FIGS. 9, 10, and 14 as well as the D2D pattern described with reference to FIG. 15. .
  • each D2D pattern is defined in a different subcarrier has been described, but the present invention is not limited thereto.
  • 18 is a conceptual diagram of a method of generating a plurality of patterns on the same frequency according to another embodiment.
  • a D2D pattern according to another embodiment may be a D2D pattern including F 'patterns smaller than F by performing frequency overlap on the remaining portions on the same frequency in F patterns.
  • frequency overlap may be performed on the remaining portions on the same frequency. As illustrated in (c) of FIG. 18, frequency overlap may be performed for two frequencies. In addition, as illustrated in FIG. 18D, frequency overlap may be performed at one frequency.
  • a method of generating a plurality of patterns on the same frequency according to another embodiment described with reference to FIG. 18 may be applied to any D2D pattern described with reference to FIGS. 9, 10, 14, etc. as well as the D2D pattern described with reference to FIG. 15. Applicable
  • each terminal 12, 14, and 16 may have a radio resource to be transmitted through D2D communication.
  • information transmission may be performed through a D2D link using a radio resource defined by the D2D pattern described with reference to FIGS. 3 to 18 or by using a separate radio resource.
  • 19 and 20 are diagrams illustrating overall D2D communication including a step in which terminals are allocated resources for use in D2D communication after terminal index sharing between terminals described with reference to FIG. 2 is performed.
  • D2D communication centralized communication
  • Each terminal 12, 14, and 16 recognizes available radio resources through carrier sensing (S1910).
  • each terminal 12, 14, 16 selects a part of an uplink radio resource or an uplink radio resource of the existing mobile communication network for sharing the terminal index (S1920).
  • operation S1920 one of the D2D patterns of the D2D patterns of FIGS. 3 and 5, 8, 9, 10, 11, 13, and 18 may be generated.
  • the pattern f may be generated in each pattern subunit by Equation 2 or the pattern f may be mapped to the resource (k, s) by one of Equations 3 to 6.
  • each of the terminals 12, 14, and 16 transmits the terminal index information for notifying of its existence using the D2D radio resource corresponding to the D2D pattern generated in step S1920, and receives the terminal index information of the neighboring D2D terminals.
  • the terminal index sharing process is performed (S1930).
  • Each terminal 12, 14, and 16 reports information on a D2D terminal located in its vicinity, for example, a searched terminal index, to the base station 20 through the LTE uplink (S1940).
  • the base station 20 determines the combination of the D2D network that can be connected between the terminals through this information.
  • the terminal intends to perform D2D communication, it reports to the base station 20 through the LTE uplink which information (type and / or size) to which terminal to transmit.
  • the base station 20 allocates a radio resource to be used for transmitting D2D information to a terminal requesting D2D transmission in consideration of D2D connection and LTE uplink scheduling between terminals (S1960).
  • the base station 20 is an indicator for performing a D2D reception for the terminal to perform the D2D reception (information about the terminal performing the D2D transmission and / or radio resources used for D2D communication and / or D2D Control information including an indicator indicating that the reception should be performed).
  • the specific terminal 12 to perform the D2D transmission performs the D2D transmission with the terminal 14 that is the target of the D2D transmission (S1970).
  • D2D communication distributed communication
  • each terminal 12, 14, 16 recognizes a radio resource that it can use through operations such as carrier sensing (S2010).
  • S2010 carrier sensing
  • each terminal 12, 14, 16 selects a part of an uplink radio resource or an uplink radio resource of the existing mobile communication network for sharing the terminal index (S2020).
  • it means generating one of the D2D patterns of FIGS. 3 and 5, 8, 9, 10, 11, 13 and 18.
  • each terminal 12, 14, and 16 may generate a pattern f in each pattern subunit by Equation 2 or assign the pattern f to a resource (k, s) by one of Equations 3 to 6. Can be mapped.
  • each of the terminals 12, 14, and 16 transmits the terminal index information for notifying its existence using the D2D radio resource corresponding to the D2D pattern generated in step S2020 and collects the terminal index information of the neighboring D2D terminals.
  • the terminal index sharing process is performed (S2030).
  • the first terminal 12 to perform D2D transmission transmits a signal including D2D information transmission, for example, terminal index information, to the second terminal 14 through a radio resource (S2040). If the terminal index sharing process (S2030) uses a signal that is broadcast casting, the terminal index transmission process (S2040) has a difference of using a dedicated signal.
  • the second terminal 14 having received the terminal index transmits a response to the first terminal 12 (S2050).
  • the first terminal 12 performs D2D communication with the second terminal 14 (S2070).
  • the centralized D2D communication described with reference to FIG. 19 or the distributed communication described with reference to FIG. 20 and a combination thereof may be referred to as spectral efficiency for data transmission and low D2D control overhead.
  • spectral efficiency for data transmission and low D2D control overhead There are other advantages, and an appropriate method may be used according to the type of service of D2D communication and the network configuration.
  • 21 is a block diagram illustrating a configuration of a terminal according to another embodiment.
  • the terminal 2100 includes a controller 2110 and a transceiver 2120.
  • the controller 2110 recognizes a radio resource available through carrier sensing and selects a part of an uplink radio resource or an uplink radio resource of an existing mobile communication network to share a terminal index.
  • One of the D2D patterns of the 8, 9, 10, 11, 13 to 18 may be generated.
  • the transmitter / receiver 2120 transmits terminal index information for notifying its presence using D2D radio resources corresponding to the D2D pattern generated in operation S1920 and performs a terminal index sharing process for receiving terminal index information of neighboring D2D terminals. Perform.
  • the transceiver 2120 reports information about a D2D UE located near itself, for example, a searched UE index, to the base station through LTE uplink or as shown in FIG. 20.
  • the D2D reception is transmitted to a terminal to perform D2D reception and a response is received from the terminal.
  • the transceiver 2120 performs a D2D transmission with a terminal, which is a target of D2D transmission.
  • 22 is a block diagram showing a configuration of a base station according to another embodiment.
  • the base station 2200 includes a transceiver 2200 and a controller 2220.
  • the transceiver 2210 receives information required for D2D communication from each terminal and transmits control information to each terminal. As illustrated in FIG. 19, the transmitter / receiver 2210 receives information about a D2D terminal located in its vicinity, for example, a searched terminal index through LTE uplink, from a specific terminal to perform D2D transmission in the case of centralized communication. do.
  • the controller 2220 allocates a radio resource to be used for transmitting D2D information to a terminal requesting D2D transmission in consideration of D2D connection and LTE uplink scheduling between terminals.
  • the controller 2220 may instruct the terminal to perform the D2D reception to perform the D2D reception by transmitting an indicator indicating to perform the D2D reception.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur : un procédé pour permettre à un terminal de communiquer avec un autre terminal par utilisation d'une ressource sans fil de liaison montante ou d'une partie de la ressource sans fil de liaison montante ; et un terminal associé.
PCT/KR2013/005833 2012-07-09 2013-07-02 Procédé de communication de dispositif à dispositif et terminal associé WO2014010858A1 (fr)

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WO2016028001A1 (fr) * 2014-08-20 2016-02-25 엘지전자 주식회사 Procédé et dispositif de transmission de signal dans un système de communication sans fil
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CN107926053A (zh) * 2015-08-13 2018-04-17 瑞典爱立信有限公司 多载波先听后说协议中的竞争窗口自适应
CN107926053B (zh) * 2015-08-13 2021-07-27 瑞典爱立信有限公司 用于多载波先听后说协议中的竞争窗口自适应的方法和网络节点
WO2020088564A1 (fr) * 2018-11-01 2020-05-07 华为技术有限公司 Procédé et appareil de transmission d'informations de commande et dispositif

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