WO2017155138A1 - Procédé et appareil pour attribuer une ressource dans un système d'accès sans fil prenant en charge les ondes millimétriques - Google Patents

Procédé et appareil pour attribuer une ressource dans un système d'accès sans fil prenant en charge les ondes millimétriques Download PDF

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Publication number
WO2017155138A1
WO2017155138A1 PCT/KR2016/002349 KR2016002349W WO2017155138A1 WO 2017155138 A1 WO2017155138 A1 WO 2017155138A1 KR 2016002349 W KR2016002349 W KR 2016002349W WO 2017155138 A1 WO2017155138 A1 WO 2017155138A1
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mmwave
terminal
information
terminal group
cell
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PCT/KR2016/002349
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English (en)
Korean (ko)
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최국헌
고현수
노광석
김동규
이상림
이호재
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엘지전자 주식회사
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Priority to PCT/KR2016/002349 priority Critical patent/WO2017155138A1/fr
Publication of WO2017155138A1 publication Critical patent/WO2017155138A1/fr

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    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to a wireless access system that supports millimeter wave (mmWave), and relates to methods for efficiently allocating resources for a plurality of millimeter wave terminals and apparatuses for supporting the same.
  • mmWave millimeter wave
  • Wireless access systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless access system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA). division multiple access) system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • An object of the present invention is to support efficient data communication in the mmWave system.
  • Another object of the present invention is to provide a resource allocation method for mmWave terminal.
  • Yet another object of the present invention is to provide an apparatus for supporting such methods.
  • the present invention relates to a wireless access system that supports millimeter wave (mmWave), and relates to methods for efficiently allocating resources for a plurality of millimeter wave terminals and apparatuses for supporting the same.
  • mmWave millimeter wave
  • a method for receiving a radio resource to a mmWave terminal in a wireless access system supporting millimeter wave (mmWave) the mmWave terminal measures the mmWave downlink channel to provide identification information about the mmWave cell belonging to the mmWave terminal Feeding back to the base station, receiving terminal group resource allocation configuration section information for the mmWave terminal group including the mmWave terminal from the base station, and resource length information allocated to the mmWave terminal group included in the terminal group resource allocation configuration section information; Receiving control channel position information, receiving control information including scheduling information for the mmWave terminal group based on the resource length information and the control channel position information, and decoding the mmWave data channel based on the scheduling information. It may include.
  • an mmWave terminal allocated with a radio resource in a wireless access system supporting millimeter wave may include a transmitter, a receiver, and a processor functionally connected to the transmitter and the receiver to support the operation of the mmWave terminal.
  • a transmitter a transmitter
  • a receiver a processor
  • a processor functionally connected to the transmitter and the receiver to support the operation of the mmWave terminal.
  • the processor may include: controlling the receiver to measure the mmWave downlink channel, and controlling the transmitter to feed back identification information on the mmWave cell to which the mmWave terminal belongs to the base station; Controlling the receiver to receive terminal group resource allocation configuration interval information for the mmWave terminal group including the mmWave terminal from the base station; Controlling the receiver to receive resource length information and control channel position information allocated to the mmWave terminal group included in the terminal group resource allocation configuration interval information; Control the receiver to receive control information including scheduling information for the mmWave terminal group based on the resource length information and the control channel position information; And control the receiver to decode the mmWave data channel based on the scheduling information.
  • the identification information may include a mmWave temporary cell identifier and a temporary identifier for the mmWave terminal determined according to the beam performance of the base station.
  • the mmWave terminal group is configured such that the same mmWave terminal is not duplicated, and the mmWave terminal may be distinguished through a temporary identifier of the mmWave terminal included in the identification information.
  • the UE group resource allocation configuration interval information may be transmitted for each mmWave UE group in a frame or subframe preset for resource allocation for the mmWave UE group.
  • the resource length information indicates the length of a frame or subframe allocated to the mmWave terminal group, but the mmWave terminal group may be mapped to at least one mmWave cell.
  • the identification information may be transmitted via mmWave uplink or legacy cellular uplink.
  • 1 is a diagram illustrating a physical channel and a signal transmission method using the same.
  • FIG. 2 is a diagram illustrating an example of a structure of a radio frame.
  • 3 is a diagram illustrating a resource grid for a downlink slot.
  • FIG. 4 is a diagram illustrating an example of a structure of an uplink subframe.
  • 5 is a diagram illustrating an example of a structure of a downlink subframe.
  • FIG. 6 is a diagram illustrating an example of an antenna port used in mmWave.
  • FIG. 7 is a diagram illustrating an example of a cell radius that can be covered by the omnidirectional antenna and the directional antenna.
  • FIG. 8 is a diagram illustrating an example of an initial stage of receive beam scanning for transmit beam scanning.
  • FIG. 9 is a diagram illustrating one of methods for performing beam scanning at a transmitting end after a receiving lobe index is fixed at a receiving side.
  • FIG. 10 is a diagram for explaining an mmWave cell structure in analog beamforming.
  • FIG. 11 is a diagram for explaining a distribution in each cell of mmWave terminals in one mmWave base station.
  • FIG. 12 is a diagram for describing an mmWave cell configuration based on FIG. 11.
  • FIG. 13 illustrates a case in which mmWave terminals are overlapped with mmWave cells according to a spatial range of mmWave cells.
  • FIG. 14 is a diagram illustrating a mmWave terminal grouping method and a resource allocation method for a terminal group.
  • FIG. 15 is a diagram illustrating a configuration section for grouping mmWave terminals and allocating resources for each mmWave group.
  • FIG. 16 is a diagram for describing a process of receiving data by an mmWave terminal belonging to an mmWave terminal group K.
  • FIG. 16 is a diagram for describing a process of receiving data by an mmWave terminal belonging to an mmWave terminal group K.
  • FIG. 17 is a diagram illustrating a mmWave terminal group resource allocation interval and a resource allocation according thereto.
  • FIG. 18 is a means by which the methods described in FIGS. 1 to 17 may be implemented.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some components and / or features may be combined to form an embodiment of the present invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
  • the base station is meant as a terminal node of a network that directly communicates with a mobile station.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
  • various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station.
  • the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.
  • a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), or a mobile subscriber station (MSS). It may be replaced with terms such as a mobile terminal or an advanced mobile station (AMS).
  • UE user equipment
  • MS mobile station
  • SS subscriber station
  • MSS mobile subscriber station
  • AMS advanced mobile station
  • the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service
  • the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems, and in particular, the present invention.
  • Embodiments of the may be supported by 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321 and 3GPP TS 36.331 documents. That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents.
  • all terms disclosed in the present document can be described by the above standard document.
  • Transmission Opportunity Period may be used in the same meaning as the term transmission period or RRP (Reserved Resource Period).
  • RRP Resource Period
  • LBT List Before Talk
  • 3GPP LTE / LTE-A system will be described as an example of a wireless access system in which embodiments of the present invention can be used.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A (Advanced) system is an improved system of the 3GPP LTE system.
  • embodiments of the present invention will be described based on the 3GPP LTE / LTE-A system, but can also be applied to IEEE 802.16e / m system and the like.
  • a terminal receives information from a base station through downlink (DL) and transmits information to the base station through uplink (UL).
  • the information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information they transmit and receive.
  • FIG. 1 is a diagram for explaining physical channels that can be used in embodiments of the present invention and a signal transmission method using the same.
  • the initial cell search operation such as synchronizing with the base station is performed in step S11.
  • the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.
  • P-SCH Primary Synchronization Channel
  • S-SCH Secondary Synchronization Channel
  • the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information in a cell.
  • PBCH physical broadcast channel
  • the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to confirm the downlink channel state.
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S12. Specific system information can be obtained.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the terminal may perform a random access procedure as in steps S13 to S16 to complete the access to the base station.
  • the UE transmits a preamble through a physical random access channel (PRACH) (S13), a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S14).
  • PRACH physical random access channel
  • the UE may perform contention resolution such as transmitting an additional physical random access channel signal (S15) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S16). Procedure).
  • the UE After performing the above-described procedure, the UE subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S17) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure.
  • a transmission (Uplink Shared Channel) signal and / or a Physical Uplink Control Channel (PUCCH) signal may be transmitted (S18).
  • UCI uplink control information
  • HARQ-ACK / NACK Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK
  • SR Scheduling Request
  • CQI Channel Quality Indication
  • PMI Precoding Matrix Indication
  • RI Rank Indication
  • UCI is generally transmitted periodically through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time.
  • the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.
  • FIG. 2 shows a structure of a radio frame used in embodiments of the present invention.
  • the type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) systems and half duplex FDD systems.
  • FDD Frequency Division Duplex
  • One subframe is defined as two consecutive slots, and the i-th subframe includes slots corresponding to 2i and 2i + 1. That is, a radio frame consists of 10 subframes.
  • the time taken to transmit one subframe is called a transmission time interval (TTI).
  • the slot includes a plurality of OFDM symbols or SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.
  • One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Since 3GPP LTE uses OFDMA in downlink, the OFDM symbol is for representing one symbol period. The OFDM symbol may be referred to as one SC-FDMA symbol or symbol period.
  • a resource block is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.
  • 10 subframes may be used simultaneously for downlink transmission and uplink transmission during each 10ms period. At this time, uplink and downlink transmission are separated in the frequency domain.
  • the terminal cannot transmit and receive at the same time.
  • the structure of the radio frame described above is just one example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.
  • Type 2 frame structure is applied to the TDD system.
  • the type 2 frame includes a special subframe consisting of three fields: a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GP guard period
  • UpPTS uplink pilot time slot
  • the DwPTS is used for initial cell search, synchronization or channel estimation in the terminal.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • the guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • Table 1 below shows the structure of the special frame (length of DwPTS / GP / UpPTS).
  • FIG. 3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.
  • one downlink slot includes a plurality of OFDM symbols in the time domain.
  • one downlink slot includes seven OFDM symbols, and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.
  • Each element on the resource grid is a resource element, and one resource block includes 12 ⁇ 7 resource elements.
  • the number NDL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth.
  • the structure of the uplink slot may be the same as the structure of the downlink slot.
  • FIG. 4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • the control region is allocated a PUCCH carrying uplink control information.
  • a PUSCH carrying user data is allocated.
  • one UE does not simultaneously transmit a PUCCH and a PUSCH.
  • the PUCCH for one UE is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots.
  • the RB pair assigned to this PUCCH is said to be frequency hopping at the slot boundary.
  • FIG. 5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.
  • up to three OFDM symbols from the OFDM symbol index 0 in the first slot in the subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which the PDSCH is allocated. to be.
  • a downlink control channel used in 3GPP LTE includes a Physical Control Format Indicator Channel (PCFICH), a PDCCH, and a Physical Hybrid-ARQ Indicator Channel (PHICH).
  • PCFICH Physical Control Format Indicator Channel
  • PDCCH Physical Hybrid-ARQ Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels within the subframe.
  • the PHICH is a response channel for the uplink and carries an ACK (Acknowledgement) / NACK (Negative-Acknowledgement) signal for a hybrid automatic repeat request (HARQ).
  • Control information transmitted through the PDCCH is called downlink control information (DCI).
  • the downlink control information includes uplink resource allocation information, downlink resource allocation information or an uplink transmission (Tx) power control command for a certain terminal group.
  • the PDCCH includes resource allocation and transmission format (ie, DL-Grant) of downlink shared channel (DL-SCH) and resource allocation information (ie, uplink grant (UL-) of uplink shared channel (UL-SCH). Grant)), paging information on a paging channel (PCH), system information on a DL-SCH, and an upper-layer control message such as a random access response transmitted on a PDSCH. It may carry resource allocation, a set of transmission power control commands for individual terminals in a certain terminal group, information on whether Voice over IP (VoIP) is activated or the like.
  • VoIP Voice over IP
  • a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH consists of an aggregation of one or several consecutive control channel elements (CCEs).
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups (REGs).
  • the format of the PDCCH and the number of bits of the PDCCH are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs
  • a plurality of multiplexed PDCCHs for a plurality of terminals may be transmitted in a control region.
  • the PDCCH is composed of one or more consecutive CCE aggregations (CCE aggregation).
  • CCE refers to a unit corresponding to nine sets of REGs consisting of four resource elements.
  • QPSK Quadrature Phase Shift Keying
  • RS reference signal
  • the base station may use ⁇ 1, 2, 4, 8 ⁇ CCEs to configure one PDCCH signal, wherein ⁇ 1, 2, 4, 8 ⁇ is called a CCE aggregation level.
  • the number of CCEs used for transmission of a specific PDCCH is determined by the base station according to the channel state. For example, one CCE may be sufficient for a PDCCH for a terminal having a good downlink channel state (close to the base station). On the other hand, in case of a UE having a bad channel state (when it is at a cell boundary), eight CCEs may be required for sufficient robustness.
  • the power level of the PDCCH may also be adjusted to match the channel state.
  • Table 2 below shows a PDCCH format, and four PDCCH formats are supported as shown in Table 2 according to the CCE aggregation level.
  • the reason why the CCE aggregation level is different for each UE is because a format or a modulation and coding scheme (MCS) level of control information carried on the PDCCH is different.
  • MCS level refers to a code rate and a modulation order used for data coding.
  • Adaptive MCS levels are used for link adaptation. In general, three to four MCS levels may be considered in a control channel for transmitting control information.
  • control information transmitted through the PDCCH is referred to as downlink control information (DCI).
  • DCI downlink control information
  • the configuration of information carried in the PDCCH payload may vary.
  • the PDCCH payload means an information bit. Table 3 below shows DCI according to DCI format.
  • a DCI format includes a format 0 for PUSCH scheduling, a format 1 for scheduling one PDSCH codeword, a format 1A for compact scheduling of one PDSCH codeword, and a very much DL-SCH.
  • Format 1C for simple scheduling, format 2 for PDSCH scheduling in closed-loop spatial multiplexing mode, format 2A for PDSCH scheduling in open-loop spatial multiplexing mode, for uplink channel
  • Format 3 and 3A for the transmission of Transmission Power Control (TPC) commands.
  • DCI format 1A may be used for PDSCH scheduling, regardless of which transmission mode is configured for the UE.
  • the PDCCH payload length may vary depending on the DCI format.
  • the type and length thereof of the PDCCH payload may vary depending on whether it is a simple scheduling or a transmission mode set in the terminal.
  • the transmission mode may be configured for the UE to receive downlink data through the PDSCH.
  • the downlink data through the PDSCH may include scheduled data, paging, random access response, or broadcast information through BCCH.
  • Downlink data through the PDSCH is related to the DCI format signaled through the PDCCH.
  • the transmission mode may be set semi-statically to the terminal through higher layer signaling (eg, RRC (Radio Resource Control) signaling).
  • the transmission mode may be classified into single antenna transmission or multi-antenna transmission.
  • the terminal is set to a semi-static transmission mode through higher layer signaling.
  • multi-antenna transmission includes transmit diversity, open-loop or closed-loop spatial multiplexing, and multi-user-multiple input multiple outputs.
  • beamforming Transmit diversity is a technique of increasing transmission reliability by transmitting the same data in multiple transmit antennas.
  • Spatial multiplexing is a technology that allows high-speed data transmission without increasing the bandwidth of the system by simultaneously transmitting different data from multiple transmit antennas.
  • Beamforming is a technique of increasing the signal to interference plus noise ratio (SINR) of a signal by applying weights according to channel conditions in multiple antennas.
  • SINR signal to interference plus noise ratio
  • the DCI format is dependent on a transmission mode configured in the terminal (depend on).
  • the UE has a reference DCI format that monitors according to a transmission mode configured for the UE.
  • the transmission mode set in the terminal may have ten transmission modes as follows.
  • transmission mode 1 single antenna port; Port 0
  • Transmission mode 7 Precoding supporting single layer transmission not based on codebook
  • Transmission mode 8 Precoding supporting up to two layers not based on codebook
  • Transmission mode 9 Precoding supporting up to eight layers not based on codebook
  • Transmission mode 10 precoding supporting up to eight layers, used for CoMP, not based on codebook
  • the base station determines the PDCCH format according to the DCI to be transmitted to the terminal, and attaches a CRC (Cyclic Redundancy Check) to the control information.
  • a unique identifier for example, a Radio Network Temporary Identifier (RNTI)
  • RNTI Radio Network Temporary Identifier
  • a paging indication identifier (eg, P-RNTI (P-RNTI)) may be masked to the CRC.
  • P-RNTI P-RNTI
  • SI-RNTI System Information RNTI
  • RA-RNTI random access-RNTI
  • the base station performs channel coding on the control information added with the CRC to generate coded data.
  • channel coding may be performed at a code rate according to the MCS level.
  • the base station performs rate matching according to the CCE aggregation level allocated to the PDCCH format, modulates the coded data, and generates modulation symbols.
  • a modulation sequence according to the MCS level can be used.
  • the modulation symbols constituting one PDCCH may have one of 1, 2, 4, and 8 CCE aggregation levels.
  • the base station maps modulation symbols to physical resource elements (CCE to RE mapping).
  • a plurality of PDCCHs may be transmitted in one subframe. That is, the control region of one subframe includes a plurality of CCEs having indices 0 to N CCE, k ⁇ 1.
  • N CCE, k means the total number of CCEs in the control region of the kth subframe.
  • the UE monitors the plurality of PDCCHs in every subframe. Here, monitoring means that the UE attempts to decode each of the PDCCHs according to the monitored PDCCH format.
  • blind decoding refers to a method in which a UE de-masks its UE ID in a CRC portion and then checks the CRC error to determine whether the corresponding PDCCH is its control channel.
  • the UE monitors the PDCCH of every subframe in order to receive data transmitted to the UE.
  • the UE wakes up in the monitoring interval of every DRX cycle and monitors the PDCCH in a subframe corresponding to the monitoring interval.
  • a subframe in which PDCCH monitoring is performed is called a non-DRX subframe.
  • the UE In order to receive the PDCCH transmitted to the UE, the UE must perform blind decoding on all CCEs present in the control region of the non-DRX subframe. Since the UE does not know which PDCCH format is transmitted, it is necessary to decode all PDCCHs at the CCE aggregation level possible until blind decoding of the PDCCH is successful in every non-DRX subframe. Since the UE does not know how many CCEs the PDCCH uses for itself, the UE should attempt detection at all possible CCE aggregation levels until the blind decoding of the PDCCH succeeds.
  • a search space (SS) concept is defined for blind decoding of a terminal.
  • the search space means a PDCCH candidate set for the UE to monitor and may have a different size according to each PDCCH format.
  • the search space may include a common search space (CSS) and a UE-specific / dedicated search space (USS).
  • the UE In the case of the common search space, all terminals can know the size of the common search space, but the terminal specific search space can be set individually for each terminal. Accordingly, the UE must monitor both the UE-specific search space and the common search space in order to decode the PDCCH, thus performing a maximum of 44 blind decoding (BDs) in one subframe. This does not include blind decoding performed according to different CRC values (eg, C-RNTI, P-RNTI, SI-RNTI, RA-RNTI).
  • CRC values eg, C-RNTI, P-RNTI, SI-RNTI, RA-RNTI
  • the base station may not be able to secure the CCE resources for transmitting the PDCCH to all the terminals to transmit the PDCCH in a given subframe. This is because resources remaining after the CCE location is allocated may not be included in the search space of a specific UE.
  • a terminal specific hopping sequence may be applied to the starting point of the terminal specific search space to minimize this barrier that may continue to the next subframe.
  • Table 4 shows the sizes of the common search space and the terminal specific search space.
  • the UE does not simultaneously perform searches according to all defined DCI formats. Specifically, the terminal always performs a search for DCI formats 0 and 1A in the terminal specific search space (USS). In this case, the DCI formats 0 and 1A have the same size, but the UE may distinguish the DCI formats by using a flag used for distinguishing the DCI formats 0 and 1A included in the PDCCH. In addition, a DCI format other than DCI format 0 and DCI format 1A may be required for the UE. Examples of the DCI formats include 1, 1B, and 2.
  • the UE may search for DCI formats 1A and 1C.
  • the UE may be configured to search for DCI format 3 or 3A, and DCI formats 3 and 3A have the same size as DCI formats 0 and 1A, but the UE uses a CRC scrambled by an identifier other than the UE specific identifier.
  • the DCI format can be distinguished.
  • the CCE according to the PDCCH candidate set m of the search space may be determined by Equation 1 below.
  • k floor ( / 2), and n s represents a slot index in a radio frame.
  • the UE monitors both the UE-specific search space and the common search space to decode the PDCCH.
  • the common search space (CSS) supports PDCCHs having an aggregation level of ⁇ 4, 8 ⁇
  • the UE specific search space supports PDCCHs having an aggregation level of ⁇ 1, 2, 4, 8 ⁇ .
  • Table 5 shows PDCCH candidates monitored by the UE.
  • Y k is defined as in Equation 2.
  • the present invention relates to a method for transmitting and receiving signals for detecting site specific ray characteristic information and rich resolvable ray detection, and devices supporting the mmWave link. Due to the existing short mmWave cell range, performing beamforming is essential for antenna beam gain of a transmit / receive antenna. Accordingly, beamforming-based beam scanning techniques have been proposed as mmWave scanning techniques. However, these techniques have a disadvantage in that transmission and reception scanning delay is long due to the overhead of beam scanning.
  • the ray scanning technique proposed in the present invention is effective in reducing a large overhead due to the beam scanning technique by detecting inherent characteristics of the mmWave environment.
  • the information due to the transmission and reception beam scanning of the terminal is not the characteristic information of the channel (for example, power delay profile (PDP) or power azimuth spectrum (PAS), etc.), so it is used for channel-specific information acquisition and application can do.
  • PDP power delay profile
  • PAS power azimuth spectrum
  • FIG. 6 is a diagram illustrating an example of an antenna port used in mmWave.
  • Antenna ports are a virtual concept of physical antennas.
  • the output sent to the antenna port necessarily includes a reference signal (RS).
  • RS reference signal
  • the output to one logical antenna port can be viewed in units of antenna streams, including the RS, in which the terminal can detect and estimate the channel by receiving the RS.
  • the terminal may transmit one antenna port. Can be assumed to be received.
  • the physical antenna is composed of a separate mapping from the antenna port, and the mapping between the physical antenna and the antenna port is determined according to a vendor. Therefore, techniques for transmitting signals or data per antenna port have been considered without considering the problem of implementing the physical antenna.
  • the term cell search is a collective term meaning a combination of measurement and evaluation detection processes. Since the cell search is the first step performed before the terminal performs cell selection, it is very closely related to the cell selection process. In addition, the cell search process has a great influence on the energy consumption of the terminal in the idle mode.
  • the DRX cycle is a kind of timer.
  • the measurement / evaluation / detection process is performed for a period specified as the number of DRX cycles.
  • the DRX cycle is determined from the network via a SIB1 message.
  • 'scan' is not explicitly defined in the specification documents, but most terminals perform this process. This is a tuning process for a particular frequency and is the simplest signal quality (eg RSSI) measurement procedure. Usually, before the measurement and evaluation process, the UE performs a scanning process first and selects a small number of candidates to perform the following process (eg, measurement and evaluation). If the terminal directly measures and evaluates all possible frequencies and bands, the terminal suffers from too much time and serious power consumption.
  • RSSI signal quality
  • the 'Measurement' is the process of measuring RSRP and RSRQ. All non-serving cell measurements are performed as defined in 36.133 of the LTE / LTE-A specification.
  • the "evaluation” process is a process for identifying cell selection criteria based on the results of the "measurement” process.
  • the 'detection' process is a process of tuning and synchronizing a specific frequency and decoding basic information of cells.
  • the WCDMA system is an earlier version of the LTE / LTE-A system, and the following description is also applicable to the LTE / LTE-A system.
  • the terminal When the terminal is powered on for the first time or the terminal is out of cell coverage, the terminal performs detection and search for a new cell. Since the UE does not know which cell of which cell to camp on, it should perform blind decoding. For example, it is assumed that the terminal supports WCDMA band I. In this case, the base station near the terminal may use the frequency channels 10562 to 10838. That is, the terminal may use 276 possible frequencies.
  • the UE first measures the RSSI for each of the supported channels.
  • RSSI is a measurement value that can be measured by the terminal for any energy / power.
  • RSSI measurement does not require a channel coding process.
  • the terminal does not need to know anything about the network. That is, the terminal does not need to decode the synchronization / reference signal in the PCPICH in the WCDMA system and the LTE system in order to detect the physical cell identifier.
  • the terminal only needs to measure the power of each channel.
  • the terminal may generate a list of channel numbers with the measured RSSI.
  • the terminal distinguishes channels whose RSSI is higher than a threshold by using a list of generated channel numbers. Then, the terminal performs the following steps to find a suitable candidate to camp on.
  • the terminal decodes the PCPICH or synchronization / reference signal to detect the physical cell identifier and measures power.
  • the terminal creates a candidate cell list with respect to the detected physical cell identifiers.
  • the terminal decodes the MIB for all candidate cells.
  • the terminal Based on the sentiment information and the candidate cell list, the terminal identifies which cell is the most suitable cell to camp on, and performs system information and registration process.
  • FIG. 7 is a diagram illustrating an example of a cell radius that can be covered by the omnidirectional antenna and the directional antenna.
  • the range of cells covered by the omnidirectional antenna is wider than the range of cells covered by the directional antenna.
  • the directional antenna is used in mmWave, that is, when beamforming is used, the range gain of the beamforming is reduced by about -20 dB. Therefore, it is preferable to use an omnidirectional antenna, but in the case of mmWave, there is a problem in that channel characteristics change rapidly according to a user position.
  • the present invention overcomes this problem and proposes methods for increasing the cell range that can be covered by an omnidirectional antenna up to the range covered by the directional antenna.
  • FIG. 8 is a diagram illustrating an example of an initial stage of reception beam scanning for transmission beam scanning
  • FIG. 9 is a diagram illustrating one of methods of performing beam scanning at a transmitting end after a reception lobe index is fixed at a reception side.
  • the transmission beam is fixed and the receiving side, i.e., the terminal, rotates the reception beam scanning 360 degrees to derive a PDP (Power Delay Prifile) for each beam.
  • the terminal selects an index of a reception lobe having a ray having the largest power among the detected PDPs.
  • the lobe refers to each radiation group when the energy distribution of the radio waves radiated from the antenna is divided in various directions. That is, it means one type of beam during beam scanning.
  • Equation 3 is used to calculate the SNR of each lobe detected by the UE.
  • Equation (3) Denotes the radio channel of the i th lobe for the transmit beam k, wi denotes the precoding matrix, pi denotes the received power, sigma ( ⁇ ) is the magnitude of the noise, and sigma is the noise Means power.
  • the time at which reception beam scanning for the fixed transmission beam lobe is completed is completed.
  • the value may be determined as in Equation 4 below.
  • the receiver repeats the above process, varying the entire transmission beam lobe of 360 to 360 degrees. Therefore, the beam scanning completion time of the receiver is to be.
  • K means the total number of transmission beams.
  • the terminal which is a receiving terminal, completes beam scanning, transmits a pilot signal to the mmWave base station again. Thereafter, the terminal performs 360 degree beam scanning to determine the transmission side lobe index. Therefore, the time when the transmission and reception beam scanning is completed Obviously, the time when the transmission and reception beam scanning is completed Obviously, the time when the transmission and reception beam scanning is completed Obviously, the time when the transmission and reception beam scanning is completed Obviously, the time when the transmission and reception beam scanning is completed Becomes
  • Table 6 below defines the parameters for measuring the beam scanning completion time.
  • the channel instead of the approximate beam scanning is used.
  • Ray scanning may be performed to obtain unique information.
  • the mmWave terminal may obtain candidate precision beam vectors using channel specific information obtained through ray scanning to reduce beam scanning overhead and reduce overall scanning time.
  • the mmWave base station transmits a time / frequency synchronization signal to synchronize time and frequency synchronization with the mmWave terminal.
  • the mmWave base station also transmits different pilot signals to perform ray scanning per cell specific port. In this case, different pilot signals per cell specific port may be repeatedly transmitted or may be transmitted with a certain period.
  • the receiving terminal performs post-processing and ray scanning per cell-specific port based on the received pilot signal.
  • the terminal determines one or more candidate beam vector sets to determine a beamforming port for beamforming to be performed in hybrid scanning. Thereafter, the terminal may perform selective beam scanning for each base station and beamforming port.
  • the terminal may transmit a pilot signal to the base station using the selected beamforming port.
  • the base station may perform selective beam scanning by detecting a pilot signal transmitted for each candidate beamforming port transmitted by the terminal.
  • the base station and / or the terminal may perform ray scanning and beam scanning together.
  • the base station and / or the terminal transmits and receives a pilot signal for performing ray scanning, performs ray scanning using a pilot signal, obtains candidate beam vector sets, and beam scans within candidate beam vector sets. Can be performed.
  • the base station may inform each terminal of a pilot index and a resource pool index to be transmitted from the terminal to the base station.
  • the pilot index and the resource pool index are transmitted to the respective UEs for performing ray scanning
  • the pilot index and the resource to which the pilot signal and the corresponding pilot signal are transmitted are multiplexed by the CDM method to the pilot signals per cell specific port. Indicate the location.
  • mmWave cells may be composed of multiple virtual cells. Accordingly, data transmission timing for mmWave terminals may be set differently in each virtual cell.
  • Embodiments of the present invention relate to resource allocation methods for mmWave terminals distributed at different densities within mmWave virtual cells managed by one or more mmWave base stations.
  • the base station controlling the mmWave link may be called an mmWave base station, and the base station controlling the legacy link may be called a legacy base station.
  • the base station may configure and manage both the mmWave link and the legacy link (eg, the link of the LTE / LTE-A system).
  • FIG. 10 is a diagram for explaining an mmWave cell structure in analog beamforming.
  • FIG. 10 (a) shows the appearance of an omni mmWave cell
  • FIG. 10 (b) shows the appearance of a directional mmWave cell.
  • the base station has a short omni cell range due to the limitation of path loss (PL). Therefore, in order to overcome this disadvantage, the mmWave system considers beamforming to extend the propagation reach through beam gain and to increase throughput through spatial reuse of directional antennas.
  • PL path loss
  • FIG. 11 is a diagram for describing a distribution state in each cell of mmWave terminals in one mmWave base station
  • FIG. 12 is a diagram for describing a mmWave cell configuration based on FIG. 11.
  • the mmWave cells in one mmWave base station may be configured according to the beamforming capability of the base station.
  • the shape of the mmWave cell is composed of a plurality of mmWave cells of various sizes and shapes.
  • an mmWave base station with 90 degrees of capability on an analog beam as shown in FIG. 11, has seven geometry-based cells relative to a 3D omni cell radius (eg omni cell and 6 directional cells). It can be configured in one mmWave base station.
  • the user UE 01 may be connected to the mmWave base station in an ommi cell, but may not be connected in beamforming in one direction (ie, with another mmWave cell). . That is, in the transmission analog beamforming, it is determined whether or not a link for the user is connected according to the transmission beam configuration in the mmWave cell and the reception beam configuration in the mmWave terminal.
  • the receive beam configuration is preferably considered by tying mmWave terminals located in distinct mmWave cells of the mmWave base station.
  • the mmWave base station can broadcast cell specific transmission configuration information for a terminal group in each mmWave cell and mmWave system information for mmWave users in each group.
  • cell specific transmission configuration information and / or mmWave system information may be transmitted to mmWave terminals in advance through the legacy system.
  • a configuration in which UE-specific transmission is performed in each mmWave cell is required.
  • FIG. 12 (a) shows a case in which resource allocation for each mmWave cell is performed by the TDM scheme
  • FIG. 12 (b) shows a method in which resources are allocated to mmWave terminals included in each mmWave cell.
  • resource allocation for an mmWave cell may be performed on a time axis in a TDM manner, but may be performed separately for an omni cell and a directional cell.
  • SF # 0 may be allocated resources for mmWave omni cells
  • SF # 2 to # 7 may be allocated resources for mmWave directional cells.
  • resource allocation for the mmWave cell is performed by the TDM scheme, and resource allocation for the mmWave terminal included in each mmWave cell may be performed by the TDM or FDM scheme.
  • a control channel for an mmWave omni cell or a control channel for an mmWave directional cell may be allocated in front of each subframe, and the corresponding control channels may include scheduling information for each subframe.
  • Resource allocation for the mmWave terminal may be considered not only TDM and FDM but also MU-MIMO scheme. If MU-MIMO is considered, the base station may reconsider resource allocation scheduling for MU-MIMO.
  • FIG. 13 illustrates a case in which mmWave terminals are overlapped with mmWave cells according to a spatial range of mmWave cells.
  • the base station includes one mmWave omni cell and N mmWave directional cells 0 to N (where N is a natural number).
  • the value of N may be determined according to the beamwidth performance of the antenna port of the base station.
  • the mmWave terminals included in each cell are indexed as UExy, x denotes an index of the mmWave cell, and y denotes an index to the terminal.
  • the mmWave terminal is included in a plurality of mmWave cells instead of one mmWave cell due to an mmVave terminal or other influence (for example, an NLoS link resistant to building reflection) between the mmWave Omni cell and each directional cell. Can be.
  • radio resources may be repeatedly allocated for one mmWave terminal. Because, when resources are allocated in the TDM scheme as shown in FIG. 12, radio resources are divided in time for each mmWave cell, and when one mmWave terminal is included in two or more mmWave cells, resources are allocated to the corresponding mmWave terminal again in all mmWave cells. It is assigned. Due to this problem, the resource to be allocated for another mmWave terminal in the same mmWave cell may be reduced.
  • each mmWave terminal it is easiest for each mmWave terminal to select an mmWave cell that receives the largest received signal by measuring RSRP.
  • the mmWave terminal included in two or more mmWave cells receives the second largest RSRP in the mmWave omni cell, but there is no other user in the mmWave omni cell, so that the target transmission rate can be most stably obtained.
  • the mmWave directional cell in which the mmWave terminal has obtained the largest RSRP it may be difficult to maintain the transmission rate for the mmWave terminal due to resources that must be allocated to other mmWave users, so that the second RSRP is linked with the measured omni cell. It may be better to connect
  • mmWave terminals in all mmWave cells of the mmWave base station may transmit information on which mmWave cell is currently in the mmWave base station via the mmWave uplink or legacy link.
  • the mmWave terminal transmits feedback information
  • the beam direction of the mmWave terminal and the beam direction of the mmWave cell are aligned. That is, it is assumed that the beam is aligned between the mmWave terminal and the mmWave cell between the mmWave terminal and the mmWave cells through the beam scanning and hybrid beam scanning methods described in Section 2.4.
  • RSRP can be determined by measuring which mmWave cell can be connected to the best link in which mmWave terminal. Accordingly, the mmWave base station may know the mmWave base station information on which mmWave cell the mmWave terminal is optimally connected to by feeding the identification information per mmWave cell uplink.
  • the feedback of the identification information is feedback for reporting which mmWave cells are connected to mmWave RRC-connected terminals in the mmWave base station.
  • the mmWave terminal measures downlink RSRP or RSRQ for the mmWave cell according to all possible transmission beams collocated at one base station, and then feeds back identification information including the information to the base station.
  • each mmWave terminal feeds back the beamforming index aligned with the mmWave cells and its GUTI (Global unique temporary ID) or its temporary ID (TMSI) in the identification information. That is, the identification information fed back may include (1) an mmWave temporary cell identifier according to a transmission directional beam, and (2) a GUTI or a temporary user ID (TMSI) for the mmWave terminal.
  • GUTI Global unique temporary ID
  • TMSI temporary ID
  • the identification information fed back is updated to the most recent information on the basis of the UE group composition interval so as not to fade.
  • Table 7 shows an example of an mmWave base station having a beamwidth capability of 60 degrees in 2D and an mmWave temporary cell identifier for each beam.
  • the mmWave terminal feeds back the TMSI for the mmWave temporary cell identifier 110 and the mmWave terminal as identification information to the base station. can do.
  • the mmWave terminal may be connected to the base station and the mmWave link and the legacy link or legacy link. That is, in a situation where the mmWave link is not connected, the mmWave terminal may feed back to the base station through the legacy uplink control channel (eg, PUCCH) or uplink data channel (eg, PUSCH).
  • the legacy uplink control channel eg, PUCCH
  • uplink data channel eg, PUSCH
  • FIG. 14 is a diagram illustrating a mmWave terminal grouping method and a resource allocation method for a terminal group.
  • each subframe has a TTI of 1 ms, and it may be assumed that a control region in which control information is transmitted is allocated to the front of each subframe.
  • one base station may include a plurality of mmWave cells. At this time, many terminals exist locally in some mmWave cells, and fewer terminals exist in some mmWave cells. Alternatively, there may be a cell with a high data rate request or a cell with a low data rate request. Therefore, resources may be unfairly allocated between each mmWave cell.
  • FIG. 14 (a) employs the mmWave cell configuration described in FIG. 13, where mmWave cell 1 is a cell in which a large number of mmWave terminals are concentrated and a high data rate is required, and mmWave cell 2 has a low number of mmWave terminals, resulting in low data rate. Means the required cell. However, mmWave cell N indicates a case in which mmWave terminals are less distributed, but mmWave terminals requiring high data rates are located.
  • FIG. 14 (b) is a diagram illustrating a state in which resources are allocated to mmWave terminals in the same manner as in FIG. 12 (b).
  • the radio resource for the mmWave cell # 0, which is an omni cell, is allocated to a subframe (SF) #N.
  • the mmWave cell # 1, which is a directional cell, is a cell requiring a high data rate due to the presence of a number of mmWave terminals. May be assigned to SF # N + 1.
  • mmWave cell # 2 is a cell requiring a low data rate due to the small number of mmWave terminals, and radio resources for this may be allocated to SF # N + 2.
  • the base station restricts the mmWave cell. It is possible to implement a resource scheduling configuration to extend the amount of transmission.
  • the mmWave base station may also be configured to allocate more resources to the mmWve terminal when the data demand for any particular mmWave terminal increases based on the above-described information.
  • FIG. 14C is a diagram for describing a method of scheduling a resource to solve the problem of FIG. 14B.
  • Each mmWave terminal included in each mmWave cell may feed back identification information on mmWave downlink through mmWave uplink or legacy link.
  • the description of the identification information may refer to Section 3.1 (S1410).
  • a UE group configuration section is a section for allocating and scheduling resources to the mmWave UE group based on the identification information of the downlink fed back from the base station.
  • the mmWave base station may create a group index for mmWave terminals in each mmWave cell, and perform resource allocation configuration for the group. have. That is, for mmWave terminals included in mmWave cells in each mmWave base station, the mmWave base station may allocate resources fairly or unfairly depending on the situation (S1420).
  • the mmWave base station may perform scheduling as shown in FIG. 14 (c) based on the received feedback information. Referring to FIG. 14 (c), when the mmWave terminals feed back identification information on mmWave downlink to the base station in step S1410, the mmWave base station may perform scheduling as shown in FIG. 14 (c) based on the received feedback information. Referring to FIG. 14 (c),
  • the base station can guarantee the required data rate by expanding the size of SF # N + 1, and by configuring the size of SF # N + 2 having a low demand for data rate, Effective use of resources If an mmWave terminal included in one mmWave cell is included in another mmWave cell, the base station can prevent duplication of resources to a specific mmWave terminal by grouping the mmWave terminals in consideration of the existence of the corresponding mmWave terminal. (S1430).
  • FIG. 15 is a diagram illustrating a configuration section for grouping mmWave terminals and allocating resources for each mmWave group.
  • the base station may group mmWave terminals.
  • grouping of mmWave terminals belonging to two or more mmWave cells may be included in only one group to prevent redundant allocation of resources. For example, if UE02 is included in both mmWave cell 0 and mmWave cell 2, UE02 is grouped with UE01, which is another mmWave terminal included in mmWave cell 0, so that resources for UE21 are later allocated SF # N + There is no need to consider the resource for UE02 at 2.
  • the base station groups the mmWave terminals according to the number of mmWave terminals and data rate requirements in each mmWave cell, and generates parameters for allocating radio resources for each mmWave terminal group. Thereafter, the base station transmits resource allocation parameters for the mmWave terminal group in mmWave downlink in the UE group resource allocation configuration section of FIG.
  • the UE group resource allocation configuration interval may be set through an mmWave RRC message.
  • the resource allocation configuration interval information for the mmWave terminal group may include (1) resource length information for the mmWave terminal group and (2) location information for the control channel for each mmWave terminal group.
  • a configuration section for mmWave terminal group resource allocation may include mmWave terminal group resource allocation configuration section information for mmWave cells 0 to K included in the mmWave base station.
  • the mmWave base station may broadcast resource allocation configuration interval information for the mmWave terminal group in each subframe (or frame).
  • the index for the mmWave terminal group may be configured to be sequentially mapped to the mmWave cell. Therefore, the resource allocation configuration interval information for the mmWave terminal group may be transmitted for each index for each subframe.
  • FIG. 16 is a diagram for describing a process of receiving data by an mmWave terminal belonging to an mmWave terminal group K.
  • FIG. 16 is a diagram for describing a process of receiving data by an mmWave terminal belonging to an mmWave terminal group K.
  • the mmWave terminal belonging to the mmWave terminal group K decodes UE group resource allocation configuration interval information in subframe K of the mmWave terminal group resource allocation configuration interval in a process corresponding to step S1420 of FIG. 14. can do.
  • the mmWave terminal may know resource allocation timing for the mmWave cell for each mmWave terminal group. Accordingly, the mmWave terminal may blindly decode an mmWave control channel allocated in a corresponding cell and then receive mmWave data based on the received control information.
  • FIG. 17 is a diagram illustrating a mmWave terminal group resource allocation interval and a resource allocation according thereto.
  • mmWave terminal group resource allocation configuration interval index 1 includes resource length information for mmWave terminal group 1. In this case, assuming that the resource length for UE group 1 is 5, it can be seen that five subframes (or frames) are allocated to mmWave UE group 1 for mmWave UE group 1 in the next mmWawe frame.
  • analog beamforming may be performed to broadcast to each mmWave cell.
  • TDMA may use TDMA according to the beam direction to eliminate ambiguity of downlink transmission caused by the configuration of multiple mmWAve cells in one mmWave base station by directional beamforming.
  • a transmission amount eg, resource allocation length, etc.
  • signaling for such resource allocation may be performed.
  • FIG. 18 is a means by which the methods described in FIGS. 1 to 17 may be implemented.
  • a user equipment may operate as a transmitter in uplink and a receiver in downlink.
  • an e-Node B eNB
  • eNB e-Node B
  • the terminal and the base station may include transmitters 1840 and 1850 and receivers 1850 and 1870 to control transmission and reception of information, data and / or messages, respectively.
  • antennas 1800 and 1810 for transmitting and receiving messages.
  • the terminal and the base station may each include a processor 1820 and 1830 for performing the above-described embodiments of the present invention, and memories 1880 and 1890 for temporarily or continuously storing the processing of the processor. Can be.
  • Embodiments of the present invention can be performed using the components and functions of the above-described terminal and base station apparatus.
  • the terminal is an mmWave terminal, and the processor of the terminal may perform mmWave beamforming (eg, analog, hybrid beamforming, etc.) by controlling the transmitter and the receiver.
  • the terminal may measure the downlink data channel and feed back link identification information to the base station.
  • the mmWave base station may allocate resources for the mmWave terminal based on the received feedback information.
  • the mmWave base station can prevent the radio resources are repeatedly allocated to the terminal by grouping the mmWave terminal, and the resources can be allocated unevenly or evenly to the mmWave terminal group in consideration of the density of the terminal and the mmWave beam direction. have. For details, refer to the contents described in Sections 1 to 3.
  • the transmitter and the receiver included in the terminal and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission. Packet scheduling and / or channel multiplexing may be performed.
  • the terminal and the base station of FIG. 20 may further include a low power radio frequency (RF) / intermediate frequency (IF) module.
  • RF radio frequency
  • IF intermediate frequency
  • the terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, an MBS.
  • PDA personal digital assistant
  • PCS personal communication service
  • GSM Global System for Mobile
  • WCDMA Wideband CDMA
  • MBS Multi Mode-Multi Band
  • a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal.
  • a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.
  • CDMA code division multiple access
  • WCDMA wideband CDMA
  • Embodiments of the invention may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • the method according to embodiments of the present invention may include 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, microcontrollers, microprocessors, and the like.
  • 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, microcontrollers, microprocessors, and the like.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
  • software code may be stored in the memory units 1880 and 1890 and driven by the processors 1820 and 1830.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • Embodiments of the present invention can be applied to various wireless access systems.
  • various radio access systems include 3rd Generation Partnership Project (3GPP), 3GPP2 and / or IEEE 802.xx (Institute of Electrical and Electronic Engineers 802) systems.
  • Embodiments of the present invention can be applied not only to the various radio access systems, but also to all technical fields to which the various radio access systems are applied.

Abstract

La présente invention concerne un système d'accès sans fil prenant en charge les ondes millimétriques (mmWave). Selon un mode de réalisation de la présente invention, un procédé d'attribution d'une ressource radioélectrique à un terminal mmWave dans le système d'accès sans fil prenant en charge les mmWave comprend les étapes suivantes : mesure, par le terminal mmWave, d'un canal de liaison descendante mmWave et renvoi, à une station de base, d'informations d'identification pour une cellule mmWave à laquelle appartient le terminal mmWave; réception, de la part de la station de base, d'informations de section de configuration d'attribution de ressources de groupe de terminaux pour un groupe de terminaux mmWave incluant le terminal mmWave; réception d'informations de longueur de ressource et d'informations d'emplacement de canal de commande attribuées au groupe de terminal mmWave, incluses dans les informations de section de configuration d'attribution de ressource de groupe de terminaux; réception d'informations de commande contenant des informations d'ordonnancement pour le groupe de terminaux mmWave sur la base des informations de longueur de ressource et des informations d'emplacement de canal de commande; et décodage d'un canal de données mmWave en se basant sur les informations d'ordonnancement.
PCT/KR2016/002349 2016-03-09 2016-03-09 Procédé et appareil pour attribuer une ressource dans un système d'accès sans fil prenant en charge les ondes millimétriques WO2017155138A1 (fr)

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US11006360B2 (en) 2017-07-27 2021-05-11 Qualcomm Incorporated Multi-beam physical downlink control channel (PDCCH) monitoring during connected mode discontinuous reception (CDRX) operation
CN110149676A (zh) * 2018-02-11 2019-08-20 华为技术有限公司 一种选择驻留小区的方法及装置
EP3735099A4 (fr) * 2018-02-11 2021-03-03 Huawei Technologies Co., Ltd. Procédé et appareil de sélection d'une cellule de résidence
US11937173B2 (en) 2018-02-11 2024-03-19 Huawei Technologies Co., Ltd. Method and apparatus for selecting cell to be camped on

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