WO2016041578A1 - Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence - Google Patents

Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence Download PDF

Info

Publication number
WO2016041578A1
WO2016041578A1 PCT/EP2014/069700 EP2014069700W WO2016041578A1 WO 2016041578 A1 WO2016041578 A1 WO 2016041578A1 EP 2014069700 W EP2014069700 W EP 2014069700W WO 2016041578 A1 WO2016041578 A1 WO 2016041578A1
Authority
WO
WIPO (PCT)
Prior art keywords
control signaling
short control
frame
signaling block
configuration information
Prior art date
Application number
PCT/EP2014/069700
Other languages
English (en)
Inventor
Esa Tapani Tiirola
Klaus Hugl
Timo Erkki Lunttila
Original Assignee
Nokia Solutions And Networks Oy
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 Nokia Solutions And Networks Oy filed Critical Nokia Solutions And Networks Oy
Priority to PCT/EP2014/069700 priority Critical patent/WO2016041578A1/fr
Publication of WO2016041578A1 publication Critical patent/WO2016041578A1/fr

Links

Classifications

    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the invention relates to communications.
  • Figure 1 shows an example communication network to which embodiments of the invention may be used
  • Figure 2 shows a flow diagram of short control signaling on an unli- censed band of a radio system according to an embodiment of the invention
  • FIG. 3A illustrates a transmission sequence according to an embodiment of the invention
  • Figure 3B shows an example of a transmission sequence according to an embodiment of the invention
  • Figure 3C illustrates a LTE-U frame according to an embodiment of the invention
  • Figures 4A to 4E illustrate some possible placement options of at least one SCS block according to an embodiment of the invention
  • Figure 5 illustrates a flow diagram according to an embodiment of the invention
  • FIG. 6 illustrates an apparatus according to an embodiment of the invention.
  • Embodiments described may be implemented in a radio system, such as in at least one of the following: Worldwide Interoperability for Micro-wave Access (WiMAX), Global System for Mobile communications (GSM, 2G), GSM EDGE radio access Network (GERAN), General Packet Radio Service (GRPS), Universal Mobile Telecommunication System (UMTS, 3G) based on basic wideband-code division multiple access (W-CDMA), high-speed packet access (HSPA), Long Term Evolution (LTE), LTE-Advanced, and/or 5G sys-tem.
  • WiMAX Worldwide Interoperability for Micro-wave Access
  • GSM Global System for Mobile communications
  • GERAN GSM EDGE radio access Network
  • GRPS General Packet Radio Service
  • UMTS Universal Mobile Telecommunication System
  • W-CDMA basic wideband-code division multiple access
  • HSPA high-speed packet access
  • LTE Long Term Evolution
  • LTE-Advanced Long Term Evolution-Advanced
  • 5G sys-tem
  • FIG. 1 shows an example of a communication network to which embod- iments of the invention may be used.
  • Radio communication networks such as the Long Term Evolution (LTE) or the LTE-Advanced (LTE-A) of the 3 rd Generation Partnership Project (3GPP), are typically composed of at least one network element, such as network element 102, providing a cell 104.
  • Each cell may be, e.g., a macro cell, a micro cell, or a pico-cell, for example.
  • the network element 102 may be an evolved node B (eNB) as in the LTE and LTE-A, a radio network controller (RNC) as in the UMTS, a base station controller (BSC) as in the GSM/GERAN, or any other apparatus capable of controlling radio communication and managing radio resources within a cell.
  • the network element 102 may be a base station or a small base station, for example.
  • the eNBs may be connected to each other with an X2 interface as specified in the LTE. Other communication methods between the network elements may be possible.
  • the network element 102 may be further connected via an S1 interface to an evolved packet core (EPC) 130, more specifically to a mobility management entity (MME) and to a system architecture evolution gateway (SAE-GW).
  • EPC evolved packet core
  • MME mobility management entity
  • SAE-GW system architecture evolution gateway
  • the network element 102 may control a cellular radio communication link 1 12 established between the network element 102 and at least one terminal device 1 10 located within or comprised in the cell 104.
  • the communication link 1 12 may be referred to as conventional communication link for end-to- end communication, where the source device transmits data to the destination device via the network element 102 and/or core network.
  • the network may support time divi- sion duplex (TDD) mode of operation.
  • TDD time divi- sion duplex
  • the at least one terminal device 1 10 may be within multiple cells provided by network elements.
  • the serving network element may be selected by various criteria, such as received power, signal to noise ratio (SNR) and path loss, to name a few.
  • the at least one terminal device 1 10 may be a terminal device of a cellular communi- cation system, e.g. a computer (PC), a laptop, a palm computer, a mobile phone, a tablet, a phablet or any other user terminal or user equipment capable of communicating with the cellular communication network.
  • the at least one terminal device 1 10 is able to communicate with other similar devices via the network element 102.
  • the other devices may be within the cell 104 and/or may be within other cells provided by other network elements.
  • the at least one terminal device 1 10 may be stationary or on the move.
  • the network may use licensed bands for communication. However, at times there may be a need to apply more resources. This may be accomplished by performing communications on unlicensed bands, such as LTE-Unlicensed (LTE- U).
  • LTE-U LTE-Unlicensed
  • An example frequency band for such unlicensed LTE-operation may be the 5 GHz industrial, scientific and medical (ISM) band.
  • ISM industrial, scientific and medical
  • the licensed band LTE may have better service quality than the unlicensed spectrum and the LTE-U may not remove the need to have more licensed band, the LTE-U may be advantageous to meet the user demands in some situations.
  • One solution may also be WiFi offloading, but the LTE-U may perform better than WiFi using the unlicensed spectrum when the system becomes heavily loaded.
  • the at least one terminal device 1 10 and/or the network element 102 may, depending on the regulatory requirements, need to monitor the given radio frequency for a short period of time to ensure the spectrum is not already occupied by some other transmission. This requirement is referred to as listen-before-talk (LBT) -procedure
  • LBT listen-before-talk
  • the proposed approach is applicable to frame based equipment.
  • Such frame based equipment are equipment where the transmit/receive structure is not directly demand-driven but has a fixed timing.
  • the LBT operation may be defined as follows.
  • the at least one terminal device 1 10 and/or the network element 102 may be required to perform a Clear Channel Assessment (CCA) procedure.
  • CCA Clear Channel Assessment
  • the at least one terminal device 1 10 and/or the network element 102 may observe the operating channel(s) for the duration of the CCA observation time and thereby may detect the received energy on the operating channel(s). This duration may be at least 20 microseconds ( ⁇ ).
  • the energy detection threshold for the CCA may be proportional to the maximum transmission power of the transmitter.
  • the operating channel may be considered occupied if the energy level in the channel exceeds a pre-set energy detection threshold. If the at least one terminal device 1 10 and/or the network element 102 finds the operating channel to be occupied, the at least one terminal device 1 10 and/or the network element 102 may not transmit on that channel during a next, predefined, fixed frame period. However, if the at least one terminal device 1 10 and/or the network element 102 finds the operating channel(s) to be clear, the transmission may be allowable on the said channel(s).
  • the total time during which the at least one terminal device 1 10 and/or the network element 102 may have transmissions on a given channel without reevaluating the availability of that channel may be defined as a channel occupancy time.
  • the channel occupancy time may be in the range 1 millisecond (ms) to 10 ms and the minimum idle period may be at least 5 % of the channel occupancy time used by the at least one terminal device 1 10 and/or the network element 102 for the current fixed frame period.
  • channel occupancy times outside the given range as the said range from 1 ms to 10 ms, may also be considered.
  • the proposed approach is applicable to load based equipment.
  • the transmit and/or receive structure may not be fixed in time but may be demand-driven. If the load based equipment finds an operating channel occupied, through some LBT/CCA procedure for example, it may not transmit in that channel. The equipment may then perform an extended CCA (eCCA) check, wherein the operating channel(s) may be observed for the duration of a ran- dom factor N multiplied by the CCA observation time. N may define the number of clear idle slots resulting in a total idle period, which may be needed to be observed before initiation of the transmission.
  • eCCA extended CCA
  • the value of N may be randomly selected in the range from 1 to q every time an eCCA may be required and the value N may be stored in a counter.
  • the counter may be decremented every time an operating chan- nel is considered to be unoccupied. When the counter reaches zero, the terminal device may transmit.
  • the value of q may be selected in the range from 4 to 32.
  • the total time that an terminal devices makes use of an operating channel may be the maximum channel occupancy which may be less than (13/32) q ms, after which the terminal device may perform the eCCA.
  • the proposed arrangement may work with or without the CCA and/or LBT procedures. Even though the operating channel may be determined to be occupied, according to the proposed arrangement, SCS may be still usable, and a SCS block may be transmitted even though the operating channel is occupied. This may increase the network capability.
  • the proposed arrangement may be suitable for LTE-U SCS, for example.
  • the said SCS may be, for example, LTE-U uplink (UL) SCS, wherein the LTE-U UL-SCS enables SCS for the at least one terminal device 1 10 towards the network element 102.
  • FIG. 2 shows a flow diagram of SCS on an unlicensed band of a radio system according to an embodiment of the invention.
  • the SCS may be and/or com- prise UL-SCS.
  • a network node such as the at least one terminal device 1 10 of Figure 1 , may obtain SCS configuration information.
  • the network node may receive the configuration from another network node.
  • the network element 102 may transmit the configuration information, and the at least one terminal device 1 10 may receive the transmitted configuration information.
  • the network element 102 may also define the configuration information to be applied in the cell 104.
  • the network node may prepare at least one SCS block based at least partly on the configuration information.
  • the configuration information may comprise length of the at least one SCS block in terms of symbols.
  • the network node may be configured to prepare the at least one SCS block based at least partly on the said length.
  • the length in symbols may refer to single carrier frequency division multiple access (SC-FDMA) and/or orthogonal frequency division multiplexing access (OFDMA) symbols, for example. The use of other similar radio symbols may be equally possible.
  • the length may be represented with a time value also. For example, the length may be 66.7 microseconds, excluding the cyclic prefix, or similar time value. It may also be possible that the length comprises minimum and/or maximum values for the length of the at least one SCS block, wherein the network node may use these values as boundary values when preparing the at least one SCS block.
  • the network node may create a transmission sequence for the at least SCS block, wherein the transmission sequence is at least partly based on the configuration information.
  • the configuration information may be used to create a transmission sequence for the at least one SCS block.
  • the transmission time may also be determined by the configuration information.
  • the at least one SCS block may be transmitted, by the network node, according to the transmission sequence.
  • the network node may transmit the at least one SCS block to another network node.
  • the at least one termi- nal device 1 10 may transmit the at least one SCS block to the network element 102.
  • the network element 102 may receive the said transmission and use the at least one SCS block to perform different network tasks.
  • the network node may transmit the at least one SCS to a plurality of network elements, wherein the network elements may comprise terminal devices and/or base stations, such as eNBs.
  • the SCS may comprise downlink SCS.
  • the functions of the above-mentioned network node may be performed by the network element 102, for example.
  • the at least one SCS block may be used in many different purposes.
  • the at least one SCS block comprises sounding reference signal (SRS) to support link adaptation and/or pre-coder selection for uplink and/or downlink transmission(s).
  • SRS sounding reference signal
  • Another use case for the at least one SCS block may be physical random access channel (PRACH) in the form of short random access channel (S- RACH), wherein the S-RACH is defined for uplink pilot time slot (UpPTS).
  • PRACH physical random access channel
  • S- RACH short random access channel
  • UpPTS uplink pilot time slot
  • This information may be used by, for example, the network element 102 to determine multiple timing advance (TA) values from the transmission of the at least one SCS block.
  • TA timing advance
  • the at least one SCS block may be used to support primary cell (PCell) triggered secondary cell (SCell) RACH transmission on secondary cell, wherein the SCell may be a unlicensed cell of a radio system, for example LTE-U cell.
  • the at least one SCS block may be used for any uplink control signaling purposes, including channel state information (CSI) feedback, hybrid automatic repeat request acknowledgement (HARQ-ACK), scheduling request (SR) and conveying scheduling information.
  • CSI channel state information
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • SR scheduling request
  • the network node performs a CCA before the transmission of the at least one SCS block.
  • the transmission of the at least one SCS block does not require performing a CCA and/or LBT procedure(s).
  • the network node performs a CCA and/or a LBT procedure ⁇ ).
  • the network node may determine, based on the CCA and/or the LBT procedure ⁇ ), that a transmission channel is occupied.
  • the network node may transmit the at least one short control signaling block on the said channel, even though the transmission channel was determined to be occupied.
  • the network node may cancel the planned transmission of other contents, based on the CCA and/or the LBT procedure(s).
  • the transmission of other contents may comprise transmission of contents in the uplink portion of a radio frame, excluding the at least one SCS block.
  • FIG. 3A illustrates the transmission sequence according to an embodiment of the invention.
  • a sequence of consecutive at least one radio frame 302-308 is shown.
  • the at least one radio frame 302-308 may comprise one or more consecutive radio frames.
  • the at least one radio frame 302-308 may be a LTE radio frame, for example. It may also be equally possible to define at least one radio frame 302-308 to be of any length.
  • the at least one radio frame 302-308 may be 5 ms long and/or 10 ms long.
  • Each radio frame 302-308 may comprise two half-frames, such as half-frame 310.
  • the half-frames may be of equal length, for example, 2,5 ms or 5 ms. In an embodiment, the half-frames are of different length. For example, one half-frame may be 2,5 ms and the other may be 7,5 ms.
  • the transmission sequence for the at least one SCS block 312-318 may be composed as shown in Figure 3A.
  • the SCS block 312 may be inserted into the second half-frame of the radio frame 302.
  • the radio frames 302-308 may last for example 10 ms. Naturally the half-frames may be then 5 ms, for example.
  • the SCS block 314 may be inserted to the second half-frame of radio frame 304.
  • the SCS blocks 316, 318 may be fitted to the radio frames 306, 308 respectfully.
  • the transmission sequence may be based at least partially on the configuration information obtained by the network node.
  • the configuration information may determine the transmission sequence as described in Figure 3A. Naturally, other kind of sequences may be possible. For example, the transmission sequence may determine timing for transmission of a single SCS block.
  • Similar timing may be used for more than one SCS block, wherein the timing may be independent of the radio frame structure.
  • the radio frame structure may not be needed to compose the transmission sequence for at least one SCS block, based on the obtained configuration infor- mation.
  • Figure 3B shows an example of the transmission sequence according to an embodiment of the invention.
  • the example of Figure 3B uses LTE-U frames, but other radio frames may be also used.
  • LTE-U frames four consecutive LTE-U frames 322-328 are shown.
  • Each frame may comprise five sub-frames numbered from 0 to 4.
  • the transmission sequence for the at least one SCS block 332-334 may be created so that SCS block 332 is fitted into the last sub-frame of the LTE-U frame 322, and the SCS block 334 is inserted into the last sub-frame of the LTE-U frame 326.
  • the CCA and/or the LBT are performed during at least one of the LTE-U frames 322-328.
  • the CCA and/or the LBT may be performed during more than one of the LTE-U frames 322-328, or during all of the said frames 322- 328.
  • the transmission sequence is created based at least partly on the configuration information obtained by the network node.
  • the configuration information may comprise at least one of the following: periodicity parameter M and offset parameter N, wherein M and N may be non-negative integers defined in terms of radio frames and/or sub-frames, wherein M may define the period between successive SCS block transmissions, and wherein N may define the timing offset of the at least one SCS with respect to the system timing.
  • periodicity parameter M and offset parameter N wherein M and N may be non-negative integers defined in terms of radio frames and/or sub-frames, wherein M may define the period between successive SCS block transmissions, and wherein N may define the timing offset of the at least one SCS with respect to the system timing.
  • the periodicity parameter M may determine the interval between at least two consecutive SCS blocks, such as SCS blocks 332, 334.
  • the network node may determine the scenarios where to use the parameter M.
  • the parameter M determines the interval between SCS blocks so that the interval is measured from the starting time of SCS blocks' transmissions.
  • the interval time may be also measured between the stop of first SCS block's transmission to the start of a second SCS block's transmission.
  • the configuration information may further comprise information for the network node, wherein the network node may use the said information to determine in which way the parameters M and N are the most beneficial to use.
  • the offset parameter N in the example of Figure 3B may be 4 ms, as said above.
  • the 4 ms may determine the starting point of the SCS blocks 332, 334 in respect to the frame timing.
  • the offset parameter may determine the position of the SCS blocks 332, 334 within the LTE-U frame.
  • the offset parameter N may not be limited to determining the position within the LTE-U, but it may determine the offset in respect to the system timing.
  • the parameter N defines the timing of a first SCS block to be transmitted within a set of LTE-U frames
  • the parameter M defines the timings of other SCS blocks to me transmitted based on the interval between the SCS blocks. Both M and N may be represented as time values or as plain numbers.
  • the LTE-U frame sub-frame length may be used as a factor for the parameters, and thus a time value may be acquired.
  • the parameters M and N may be non-negative integers, negative and decimal numbers may be also used.
  • the network node may have to do further operations before the parameters may be used as de- scribed above.
  • the configuration information comprises at least one of the following: periodicity parameter M and offset parameter N, wherein M and N are non-negative integers, wherein M multiplied with radio frame duration L is the interval between sequenced at least one short control signaling block, and wherein N defines the timing offset of the at least one short control signaling block with respect to the system timing.
  • the half-frame 310 of Figure 3A comprises and/or is one of the LTE-U frames 322-328 of Figure 3B.
  • the radio frames 302-308 may comprise and/or equal to the LTE-U frames 322-328.
  • the at least one SCS block may last as long as the sub-frame of Figures 3A and/or 3B.
  • the at least one SCS block may be shorter than the sub-frame.
  • the at least one SCS block may last, for example, the duration of one and/or two OFDMA and/or SC-FDMA symbols.
  • the at least one SCS block is inserted within an uplink portion of at least one radio frame, such as LTE-U frames 322-328 and/or radio frames 302-308. This may mean that the at least one SCS block is inserted within an uplink sub-frame.
  • the configuration information comprises position information, of which an example is given above in the form of N and M parameters.
  • the position information may be used, by the network node, to perform at least one of the following: determining timing of the at least one SCS block's transmission and determining the location of the at least one SCS block. Even though the timing was described using a radio or LTE-U frame as an example in Figure 3A and 3B, other timing methods may also be used.
  • FIG. 3C illustrates a LTE-U frame, such as LTE-U frames 322-328, according to an embodiment of the invention.
  • the LTE-U frame may comprise sub-frames 342.
  • the LTE-U frame comprises two downlink sub-frames and three uplink sub-frames.
  • the downlink sub-frames may comprise a downlink pilot time slot (DwPTS).
  • DwPTS downlink pilot time slot
  • GP guard period
  • the sub-frame may comprise two slots.
  • An individual slot may comprise 7 OFDMA and/or SC-FDMA symbols, marked with numbers in the last sub-frame of Figure 3C.
  • SCS block 352 may last for one and/or more said symbols length. In Figure 3C, the SCS block 352 may be one symbol long.
  • Figures 4A to 4E illustrate some possible placement options of the at least one SCS block according to an embodiment of the invention.
  • the network node may shorten the contents of a sub-frame by at least the length of the at least one SCS block 402, and insert contents of the at least one SCS block 402, based on the configuration information and/or position information, inside the said sub-frame.
  • the total duration of the LTE-U frame may not be changed, but the contents inside the frame may be changed.
  • the network node may determine how many symbols the at least one SCS block 402 may use within the sub- frame.
  • the sub-frame's contents may comprise data carried by physical uplink control channel (PUCCH) and/or physical uplink shared channel (PUSCH), for example.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • the said data may be shortened accordingly, as the at least one SCS block 402 configuration demands.
  • the shortened sub-frame of Figure 4A is the last sub-frame of the LTE-U frame or another radio frame.
  • the contents of the at least one SCS block are inserted to be the last contents of the last sub- frame.
  • the sub-frame may not be shortened as the at least one SCS block 404 may be inserted, based on the configuration information, after the last sub-frame of a LTE-U frame. This way the contents of the sub-frame may remain unchanged as there may not be a need for shortening the contents.
  • the at least one SCS block 404 is inserted after a sub-frame, which is not necessarily the last sub-frame.
  • the at least one SCS block 404 may reside between two consecutive sub-frames.
  • the at least one SCS block 404 is a separate block and is inserted, by the network node, to end of the last sub-frame so that there is no gap between the last sub-frame and the at least one SCS block 404. This may mean that immediately when the transmission of the last sub-frame ends, the transmission of the at least one SCS block 404 starts. In an embodiment, there is a gap between the last sub-frame and the at least one SCS block 404. The gap may be, for example, one and/or two SC-FDMA symbols long, or any other length which is less or the same than the length of the last sub-frame.
  • the at least one SCS block corresponds to UpPTS and related functionalities defined for LTE TDD, for example, SRS and/or S-RACH defined for UpPTS.
  • the LTE-U frame may comprise a special sub-frame, wherein the special sub-frame may at least comprise a downlink portion 412, at least one guard period 422 and an uplink portion.
  • the uplink portion may accommodate the at least one SCS block 406, but the contents of the uplink portion may not be limited to SCS blocks.
  • the at least one SCS block 406 may be inserted, based on the configuration information, within the uplink portion of the special sub-frame, wherein the at least one guard period 422 may comprise at least two guard periods 422, and wherein the uplink portion accommodating the at least one SCS block 406 may be arranged to be situated between the at least two guard periods 422.
  • the CCA and or LBT procedure(s) are performed within at least one guard period 422 of the special sub-frame.
  • the CCA and/or LBT procedure ⁇ ) may be performed after the transmission of the at least one SCS block 406.
  • the CCA and/or LBT procedure(s) are performed before the trans- mission of the at least one SCS block 406. Even though the CCA and/or LBT procedure ⁇ ) would determine the channel used for transmission to be occupied, the at least one SCS block 406 may still be transmitted.
  • the frame may comprise similar special sub-frame as in Figure 4C.
  • the at least one SCS block 408 may be inserted, based on the con- figuration information, within the uplink portion of a special sub-frame, wherein the uplink portion is arranged to be situated after the at least one guard period 422. In an embodiment, the uplink portion is longer than the at least one SCS block 408.
  • the three uplink sub-frames after the special sub-frame may be used for downlink too.
  • the network node may determine that at least one of the sub-frames needs to be used for receiving data instead of transmission. The determination may be based on the configuration information, for example. Other controlling messaging may be also used. The determination may further be based on the CCA and/or LBT procedure(s). If the transmission channel is determined to be occupied, the network node may change to listening mode within the LTE-U frame. This may mean using some or all the sub-frames for receiving data.
  • the LTE-U frame may comprise only an uplink portion.
  • the configuration and/or configuration information relevant for the said UL-SCS may also only comprise configuration of the uplink portion.
  • the at least one SCS block 490 may be inserted within the uplink portion of the LTE-U frame. Even though the placement is done in Figure 4E to the end of the frame, other placement options may be equally possible.
  • the at least one SCS block 490 may be inserted, for example, in the middle portion of the frame.
  • the described approach may mean that, for example, guard periods may not be needed, and thus the transmitting may be more efficient.
  • uplink portion relevant to UL-SCS may be defined such that it may apply only to certain symbols, slots and/or subframes of the radio frame and/oror some other predefined time unit. Remaining parts of the radio frame and/or some other predefined time unit may be allocated to DL as in Figures 4A-4C, to downlink and flexible uplink/downlink as in Figure 4D and/or they may be left undefined at least from the viewpoint of terminal device transmitting the UL-SCS. Any combination of the above-mentioned may be applied as well.
  • FIGS. 4E are introduced as separate, it may be possible to use any combination of the embodiments.
  • a special sub-frame may be used in Figure 4A and 4B, sub- frames may be changed from uplink to downlink may be possible for each of the Figures 4A to 4B and/or a sub-frame may be shortened accordingly.
  • Figure 5 illustrates a flow diagram of an embodiment of the invention.
  • the network node may determine that the at least one SCS block is not required to be transmitted. This may mean that even though there is provided a time slot for the transmission, it may not be required. Based on the determination, the network node may enter listening mode for the duration of the said time slot reserved for the transmission (block 504). Using this approach, the network node may listen to other network nodes transmitting on that time slot. Thus, device-to- device (D2D) communication may be possible, and the at least one SCS block may be applied for D2D channel sounding. The network node may determine that it needs to send the at least one SCS block and continue on to transmitting the at least one SCS block according to the step 208 of Figure 2.
  • D2D device-to- device
  • the proposed approach in Figure 5 may require that some and/or all network nodes within a cell are made aware of each other's UL-SCS configuration.
  • the UL-SCS configuration may comprise information about transmission sequence, SCS block sizes, the number of SCS blocks transmitted and/or the time of each transmis- sion, to name a few.
  • all the terminal devices in the cell are made aware of each other's UL-SCS configuration.
  • An eNB may transmit control information, wherein control information may comprise the UL-SCS configuration.
  • the UL- SCS configuration may be the same for each of the terminal devices in the cell.
  • the UL-SCS configuration may vary between the terminal devices.
  • the UL-SCS may be designed and/or configured to be such that at the UL-SCS time instants of the terminal device in the cell, the eNB is in Rx phase and the terminal device transmitting the UL-SCS is in Tx phase.
  • the configuration information of the UL-SCS may be delivered by using a cell-specific higher layer signaling, such as predefined system information block (SIB).
  • SIB system information block
  • the configuration may be a part of signaling defining the TDD frame structure and parameters applicable to TDD operation on the LTE-U band.
  • Dedicated UL-SCS resources may be configured using a dedicated higher layer signaling, such as radio resource control (RRC).
  • RRC radio resource control
  • the resources may be given directly by, for example, an eNB and received by a terminal device, wherein the terminal device only uses the time slots and other information to transmit predetermined information using the UL-SCS.
  • the terminal device decides to transmit the at least one SCS block when the amount of data in the terminal devices buffer is over a predetermined amount.
  • the eNB may coordinate UL-SCS resource usage among plurality of carriers and among multiple cells and exchange the information regarding configurations over, for example, X2 interface between one or more eNBs. It may be possible for the eNB to control individually each terminal device and/or a group of terminal devices.
  • the UL-SCS resources are configured in cell-specific manner by the eNB or a network controller controlling a group of base stations, for example.
  • Each terminal device within the cell, provided by the eNB, may have their UL-SCS resources coinciding. This may enable the D2D communication utilization between the terminal devices.
  • the UL-SCS configuration may involve information of time domain position of UL-SCS within the UL portion of a LTE-U frame, such as LTE- U frames of Figure 3B, as shown in Figures 4A to 4E.
  • the resources for the UL-SCS are defined within the cell provided by the eNB. This may mean that the cell may have a dedicated resource pool for UL-SCS. Different terminal devices utilizing the cell-specific UL-SCS resources, form the said resource pool, may have a dedicated, terminal device specific resource allocation within the preconfigured resource pool for each channel and/or signals present in UL-SCS. Thus, different terminal devices within the cell may utilize the common resource pool for the UL-SCS.
  • the dedicated resources may be defined by means of a combination of frequency, time and/or code resources, and a predefined periodicity and resource offset. The definition may happen periodically, for ex- ample following an RRC configuration, and/or triggered in an aperiodic manned by downlink control signaling, such using downlink control information (DCI) via PCell and/or SCell.
  • DCI downlink control information
  • the dimensioning of UL-SCS resources is at least par- tially based on a 5 % rule of SCS standard on 5 GHz band specified by ETSI.
  • the 5 % rule may be usable on other bands too.
  • the 5 % rule may mean that the minimum channel idle period time may be at least 5 % of the channel occupancy time. This rule may be applicable for a fixed frame period. Similar rule may exist for load based equipment, in which the maximum channel occupancy time may be less than (13/32) x q, wherein the value of q may be selected in the range of 4 to 32, for example.
  • the idle period may comprise the at least one guard period 422 of Figure 4C, for example.
  • the idle period may be between two LTE-U frames 322-328 of Figure 3B.
  • the network node may fulfill the 5 % rule.
  • the last sub-frame may be short- ened even more to fulfill the said rule. It may be possible to shorten other sub-frames of the LTE-U frame 322-328 to fulfill the said rule.
  • the 5 % rule may be understood to be fulfilled if the channel idle time within, for example, the LTE-U frame 322 is at least 5 % of the channel occupancy time of the LTE-U frame 322.
  • the network node may have to be silent and/or idle.
  • the presence of UL-SCS is taken in to account when dimensioning the LTE-U frame structure. This may ensure that the minimum idle period shall be at least 5 % of the channel occupancy time used by the network node for the current fixed frame period also in the case the network node transmits both regular uplink sub-frames and UL-SCS. This may mean that if the network node deter- mines that it needs to send a UL-SCS block within a LTE-U frame, some of the sub- frames of the LTE-U frame may be shortened to meet the said 5 % rule. The shortened sub-frames may be, for example, the uplink sub-frames.
  • the network node is the at least one terminal device
  • Figure 6 provides apparatus 600 comprising a control circuitry (CTRL)
  • these operations may comprise tasks, such as, obtaining, by a network node, short control signaling configuration information, preparing at least one short control signaling block based at least partly on the configuration information, creating a transmission sequence for the at least one short control signaling block based at least partly on the configuration information, and transmitting the at least one short control signaling block according to the transmis- sion sequence.
  • the memory 630 may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the memory 630 may comprise a database 634 for storing data, such as SCS configuration information, SCS block(s) and/or transmission sequence(s), as described above.
  • the apparatus 600 may further comprise radio interface (TRX) 620 comprising hardware and/or software for realizing communication connectivity according to one or more communication protocols.
  • TRX radio interface
  • the TRX may provide the apparatus with communication capabilities to access the radio access network and enable communication between network nodes, such as D2D, for example.
  • the TRX may comprise standard well-known components such as an amplifier, filter, frequency-converter, (de)modulator, and encoder/decoder circuitries and one or more antennas.
  • the apparatus 600 may also comprise user interface 640 comprising, for example, at least one keypad, a microphone, a touch display, a display, a speaker, etc. Each user interface may be used to control the respective apparatus by the user.
  • the apparatus 600 is or is comprised in the at least one terminal device 1 10.
  • the control circuitry 610 may comprise SCS configuration information cir- cuitry 612 configured to obtain short control signalling configuration information. As described above, the obtaining may comprise receiving the information from an external source, such as eNB.
  • the control circuitry 610 may comprise SCS block circuitry 614 configured to prepare at least one short control signaling block based at least partly on the configuration information.
  • the control circuitry 610 may further comprise a transmission sequence circuitry 616 configured to create a transmission sequence for the at least one SCS block based at least partly on the configuration information.
  • the control circuitry 610 may further comprise a SCS transmitter circuitry 618 configured to transmit the at least one SCS according to the transmission sequence.
  • circuitry refers to all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of circuits and soft-ware (and/or firm- ware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processors/software including digital signal processor(s), software, and memory(ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry' applies to all uses of this term in this application.
  • the term 'circuitry' would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and/or firmware.
  • the term 'circuitry' would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device.
  • At least some of the processes described in connection with Figures 1 to 5 may be carried out by an apparatus comprising corresponding means for carrying out at least some of the described processes.
  • Some example means for carrying out the processes may include at least one of the following: detector, processor (including dual-core and multiple-core processors), digital signal processor, controller, receiver, transmitter, encoder, decoder, memory, RAM, ROM, software, firmware, display, user interface, display circuitry, user interface circuitry, user interface software, display software, circuit, antenna, antenna circuitry, and circuitry.
  • the at least one processor, the memory, and the computer program code form processing means or comprises one or more computer program code portions for carrying out one or more operations according to any one of the embodiments of Figures 1 to 5 or operations thereof.
  • these operations may comprise tasks, such as, obtaining, by a network node, short control signaling configuration information, preparing at least one short control signaling block based at least partly on the configuration information, creating a transmission sequence for the at least one short control signaling block based at least partly on the configuration information, and transmitting the at least one short control signaling block according to the transmission sequence.
  • the apparatus carrying out the embodiments comprises a circuitry including at least one processor and at least one memory including computer program code.
  • the circuitry When activated, the circuitry causes the apparatus to perform at least some of the functionalities according to any one of the embodiments of Figures 1 to 5, or operations thereof.
  • these opera- tions may comprise tasks, such as, obtaining, by a network node, short control signaling configuration information, preparing at least one short control signaling block based at least partly on the configuration information, creating a transmission sequence for the at least one short control signaling block based at least partly on the configuration information, and transmitting the at least one short control signaling block according to the transmission sequence.
  • the techniques and methods described herein may be implemented by various means. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or combinations thereof.
  • the apparatus(es) of embodiments may be implemented within one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units de- signed to perform the functions described herein, 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
  • processors controllers, micro-controllers, microprocessors, other electronic units de- signed to perform the functions described herein, or a combination thereof.
  • the implementation can be carried out through modules
  • the software codes may be stored in a memory unit and executed by processors.
  • the memory unit may be implemented within the processor or externally to the processor. In the latter case, it can be communicatively coupled to the processor via various means, as is known in the art.
  • the components of the systems described herein may be rearranged and/or complemented by additional components in order to facilitate the achievements of the various aspects, etc., described with regard thereto, and they are not limited to the precise configurations set forth in the given figures, as will be appreciated by one skilled in the art.
  • Embodiments as described may also be carried out in the form of a computer process defined by a computer program or portions thereof. Embodiments of the methods described in connection with Figures 1 to 5 may be carried out by executing at least one portion of a computer program comprising corresponding instructions.
  • the computer program may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, which may be any entity or device capable of carrying the program.
  • the computer program may be stored on a computer program distribution medium readable by a computer or a processor.
  • the computer program medium may be, for example but not limited to, a record medium, computer memory, read-only memory, electrical carrier signal, telecommunications signal, and software distribution package, for example.
  • the computer program medium may be a non-transitory medium. Coding of software for carrying out the embodiments as shown and described is well within the scope of a person of ordinary skill in the art.

Abstract

L'invention concerne un procédé de signalisation de commande de messages courts, sur une bande sans licence d'un système radio. Le procédé consiste à : obtenir des informations de configuration de signalisation de commande de messages courts ; préparer au moins un bloc de signalisation de commande de messages courts au moins partiellement d'après les informations de configuration ; créer une séquence de transmission pour le ou les blocs de signalisation de commande de messages courts au moins partiellement d'après les informations de configuration ; et transmettre le ou les blocs de signalisation de commande de messages courts suivant la séquence de transmission.
PCT/EP2014/069700 2014-09-16 2014-09-16 Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence WO2016041578A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/069700 WO2016041578A1 (fr) 2014-09-16 2014-09-16 Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/069700 WO2016041578A1 (fr) 2014-09-16 2014-09-16 Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence

Publications (1)

Publication Number Publication Date
WO2016041578A1 true WO2016041578A1 (fr) 2016-03-24

Family

ID=51582375

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/069700 WO2016041578A1 (fr) 2014-09-16 2014-09-16 Amélioration de l'efficacité d'une signalisation de commande de messages courts, dans un spectre sans licence

Country Status (1)

Country Link
WO (1) WO2016041578A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716830A (zh) * 2018-11-29 2019-05-03 北京小米移动软件有限公司 非授权频谱中的通信方法、装置及系统
CN110959297A (zh) * 2017-07-21 2020-04-03 日本电气株式会社 上行链路数据传输和调度的方法和设备
CN111050402A (zh) * 2018-10-15 2020-04-21 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
WO2022213947A1 (fr) * 2021-04-06 2022-10-13 展讯通信（上海）有限公司 Procédé de décodage de signalisation de commande et dispositif électronique
EP4147438A4 (fr) * 2021-07-22 2023-03-15 Apple Inc. Configuration de procédure écouter avant de parler et de signalisation de commande courte
WO2023044713A1 (fr) * 2021-09-24 2023-03-30 Oppo广东移动通信有限公司 Procédé et appareil de communication

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2037703A1 (fr) * 2007-09-11 2009-03-18 Nokia Siemens Networks Oy Procédé et dispositif pour fournir des informations de signalisation et système de communication comprenant un tel dispositif
EP2696530A2 (fr) * 2012-08-10 2014-02-12 BlackBerry Limited Support de composant secondaire TD LTE dans des bandes non autorisées

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2037703A1 (fr) * 2007-09-11 2009-03-18 Nokia Siemens Networks Oy Procédé et dispositif pour fournir des informations de signalisation et système de communication comprenant un tel dispositif
EP2696530A2 (fr) * 2012-08-10 2014-02-12 BlackBerry Limited Support de composant secondaire TD LTE dans des bandes non autorisées

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN; Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive ; 0060009v003", IEEE DRAFT; 0060009V003, IEEE-SA, PISCATAWAY, NJ USA, vol. 802.11, no. v003, 18 December 2011 (2011-12-18), pages 1 - 87, XP017698055 *
MARCELO LUIZ RODRIGUES DE CAMPOS ET AL: "LTE/Wi-Fi Coexistence: Challenges and Mechanisms", SBRT 2013, 30 October 2013 (2013-10-30), XP055199473, ISBN: 978-8-58-974809-4, DOI: 10.14209/sbrt.2013.91 *
NOKIA NETWORKS ET AL: "On Listen Before Talk and Channel Access", vol. RAN WG1, no. San Francisco, USA; 20141117 - 20141121, 8 November 2014 (2014-11-08), XP050895504, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_79/Docs/> [retrieved on 20141108] *
NOKIA NETWORKS ET AL: "Short Control Signalling for LTE LAA", vol. RAN WG1, no. Ljubljana, Slovenia; 20141006 - 20141010, 27 September 2014 (2014-09-27), XP050869830, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_78b/Docs/> [retrieved on 20140927] *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110959297A (zh) * 2017-07-21 2020-04-03 日本电气株式会社 上行链路数据传输和调度的方法和设备
US11917419B2 (en) 2017-07-21 2024-02-27 Nec Corporation Methods and devices for uplink data transmission and scheduling
CN111050402A (zh) * 2018-10-15 2020-04-21 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN111050402B (zh) * 2018-10-15 2022-05-24 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN109716830A (zh) * 2018-11-29 2019-05-03 北京小米移动软件有限公司 非授权频谱中的通信方法、装置及系统
WO2022213947A1 (fr) * 2021-04-06 2022-10-13 展讯通信（上海）有限公司 Procédé de décodage de signalisation de commande et dispositif électronique
EP4147438A4 (fr) * 2021-07-22 2023-03-15 Apple Inc. Configuration de procédure écouter avant de parler et de signalisation de commande courte
WO2023044713A1 (fr) * 2021-09-24 2023-03-30 Oppo广东移动通信有限公司 Procédé et appareil de communication

Similar Documents

Publication Publication Date Title
US10666404B2 (en) Communication efficiency
CN111404655B (zh) 用于改进解码时间线的搜索空间和探通参考信号放置的优化
KR102170066B1 (ko) 향상된 캐리어 집성을 위한 사운딩 참조 신호 트리거링
EP2947797B1 (fr) Procédé de réception d&#39;informations de commande dans un système de communication sans fil et appareil correspondant
KR102079200B1 (ko) 면허 지원 액세스에서의 스케줄링
EP2536203A1 (fr) Procédé, système et dispositif pour la programmation d&#39;un accès aléatoire non concurrentiel et pour la transmission d&#39;un préambule
US9496919B2 (en) Mobile communication networks
WO2016064194A2 (fr) Procédé d&#39;émission/réception d&#39;un signal d2d dans un système de communication sans fil, et appareil associé
US10419942B2 (en) Wireless signal transmission and reception method and device in wireless communication system involving a cell group including unlicensed band cells
WO2016041578A1 (fr) Amélioration de l&#39;efficacité d&#39;une signalisation de commande de messages courts, dans un spectre sans licence
KR102387908B1 (ko) 커버리지 향상을 위한 물리 브로드캐스트 채널
WO2017079284A1 (fr) Procédé de communication sans fil et équipement utilisateur
US11240842B2 (en) Device and method of handling transmission/reception for serving cell
KR102203641B1 (ko) 방법, 시스템 및 장치
US11363641B2 (en) Validation rules for random access message transmission occasions
CN109891794A (zh) 用于使用两级上行链路调度发送反馈的方法和装置
EP3642992A1 (fr) Adaptation de masque marche/arrêt pour nr avec différentes numérologies
CN113365236A (zh) 上行信号在多载波间传输的方法、用户设备、基站及系统
KR102546637B1 (ko) 비면허대역 프레임 구성 방법 및 장치
JP2020191682A (ja) 通信を実行するための方法および装置

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: 14771257

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: 14771257

Country of ref document: EP

Kind code of ref document: A1