WO2012102487A1 - Procédé servant à des données en liaison montante dans un système de communication sans fil et dispositif associé - Google Patents

Procédé servant à des données en liaison montante dans un système de communication sans fil et dispositif associé Download PDF

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Publication number
WO2012102487A1
WO2012102487A1 PCT/KR2011/009904 KR2011009904W WO2012102487A1 WO 2012102487 A1 WO2012102487 A1 WO 2012102487A1 KR 2011009904 W KR2011009904 W KR 2011009904W WO 2012102487 A1 WO2012102487 A1 WO 2012102487A1
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paging
interval
base station
message
idle mode
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English (en)
Korean (ko)
Inventor
이진
정인욱
박기원
육영수
김정기
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting uplink data in a wireless communication system.
  • the Institute of Electrical and Electronics Engineers (IEEE) 802.16e standard is the sixth standard for the International Mobile Telecommunications (IMT-2000) in the ITU-Radiocommunication Sector (ITU-R) under the International Telecommunication Union (ITU) in 2007. It was adopted under the name OFDMA TDD '. ITU-R is preparing the IMT-Advanced system as the next generation 4G mobile communication standard after IMT-2000.
  • the IEEE 802.16 Working Group (WG) decided to implement the IEEE 802.16m project in late 2006 with the aim of creating an amendment specification for the existing IEEE 802.16e as a standard for IMT-Advanced systems.
  • the IEEE 802.16m standard implies two aspects: the past continuity of modification of the IEEE 802.16e standard and the future continuity of the specification for next generation IMT-Advanced systems. Therefore, the IEEE 802.16m standard is required to satisfy all the advanced requirements for the IMT-Advanced system while maintaining compatibility with the Mobile WiMAX system based on the IEEE 802.16e standard.
  • the IEEE 802.16p specification which is based on the IEEE 802.16e standard and the IEEE 802.16m standard and optimized for machine-to-machine communication (M2M), is being developed.
  • M2M communication may be defined as an information exchange performed between a subscriber station and a server or between subscriber stations in a core network without any interaction with a person.
  • the IEEE 802.16p specification is a minimal change in the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer (PHY) within the enhancements of Medium Access Control (MAC) and licensed bands of the IEEE 802.16 specification. Is under discussion. As the IEEE 802.16p specification is discussed, wide area wireless coverage is required within the licensed band, and the scope of application of automated M2M communications for the purpose of observation and control is wide. Can lose.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • PHY Physical layer
  • MAC Medium Access Control
  • M2M applications have significantly different requirements for network access, typically human-initiated or human-controlled network access. Require. M2M applications include vehicular telematics for vehicles, healthcare monitoring of bio-sensors, remote maintenance and control, smart metering, and consumer devices Automated services, etc. M2M application requirements include very lower power consumption, large numbers of devices, short bursts, etc. transmission, device tampering detection and reporting, improved device authentication, and the like.
  • An object of the present invention is to provide a method and apparatus for transmitting uplink data in a wireless communication system.
  • the present invention provides a method of selectively limiting a ranging request of an M2M device using a paging unavailable interval (PUI) set in an idle mode. Accordingly, the present invention provides a method for transmitting uplink data according to a configured PUI.
  • PUI paging unavailable interval
  • a method for transmitting uplink (UL) data by a machine-to-machine (M2M) device operating in an idle mode in a wireless communication system receives a UL access indicator from a base station for setting a UL unavailable interval (UAI) within a paging unavailable interval (PUI) of the idle mode, And transmitting the UL data to the base station through at least one of a paging interval (PI) and a UL available interval (AI) available in the non-pageable interval.
  • UAI UL available interval
  • the non-pageable period may be the same as the UL impossible period.
  • the non-pageable period may be set in units of paging cycles.
  • the UL access indicator may indicate an offset between the end point of the paging segment and the start point of the UL impossible segment.
  • the UL access indicator may indicate a time duration of the UL impossible period.
  • the UL access indicator may set the UL impossible section by a bitmap.
  • the UL connection indicator may be received through either a capability negotiation response message or an idle mode response message.
  • the UL connection indicator may be received through a paging message.
  • the paging message may be transmitted in M2M group units.
  • a machine-to-machine apparatus in a wireless communication system.
  • the M2M device includes a radio frequency (RF) unit for transmitting or receiving a radio signal, and a processor connected to the RF unit, wherein the processor is UL-unavailable within a paging unavailable interval (PUI) of the idle mode.
  • RF radio frequency
  • PKI paging unavailable interval
  • a UL access indicator for setting an interval (UAI; unavailable interval) is received from a base station, and a paging interval (PI) in the idle mode and a UL available interval (AI) in the non-pageable interval are available.
  • 1 illustrates a wireless communication system
  • FIGS. 2 and 3 illustrate an example of a system architecture of IEEE 802.16 supporting machine-to-machine communication.
  • FIG. 4 shows an example of a frame structure of IEEE 802.16e.
  • FIG 5 shows an example of a frame structure of IEEE 802.16m.
  • FIG 6 shows an embodiment of the proposed uplink data transmission method.
  • FIG. 7 shows an example of an UL access restriction interval set according to the proposed uplink data transmission method.
  • FIG. 8 is an example of a UL capable section and a UL impossible section set in units of a paging period according to the proposed uplink data transmission method.
  • FIG. 10 is a block diagram of a wireless communication system in which an embodiment of the present invention is implemented.
  • 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), or the like.
  • IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e.
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using Evolved-UMTS Terrestrial Radio Access (E-UTRA), which employs OFDMA in downlink and SC in uplink -FDMA is adopted.
  • LTE-A Advanced
  • 3GPP LTE Advanced
  • 1 illustrates a wireless communication system
  • the wireless communication system 10 includes at least one base station (BS) 11.
  • Each base station 11 provides a communication service for a particular geographic area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the UE 12 may be fixed or mobile, and may have a mobile station (MS), a mobile terminal (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a PDA ( Other terms may be referred to as a personal digital assistant, a wireless modem, a handheld device, etc.
  • the base station 11 generally refers to a fixed station that communicates with the terminal 12. It may be called other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • the UE belongs to one cell, and the cell to which the UE belongs is called a serving cell.
  • a base station that provides a communication service for a serving cell is called a serving BS. Since the wireless communication system is a cellular system, there are other cells adjacent to the serving cell. Another cell adjacent to the serving cell is called a neighbor cell.
  • a base station that provides communication service for a neighbor cell is called a neighbor BS.
  • the serving cell and the neighbor cell are relatively determined based on the terminal.
  • downlink means communication from the base station 11 to the terminal 12
  • uplink means communication from the terminal 12 to the base station 11.
  • the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
  • the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
  • FIGS. 2 and 3 illustrate an example of a system architecture of IEEE 802.16 supporting machine-to-machine communication.
  • the basic M2M service system architecture 20 may include a mobile network operator (MNO) 21, an M2M service consumer 24, at least one IEEE 802.16 M2M device (hereinafter, 802.16 M2M device, 28), at least One non-IEEE 802.16 M2M device 29 is included.
  • the MNO 21 includes an access service network (ASN) and a connectivity service network (CSN).
  • the 802.16 M2M device 28 is an IEEE 802.16 terminal with M2M functionality.
  • the M2M server 23 is an entity that communicates with one or more 802.16 M2M devices 28.
  • the M2M server 23 has an interface to which the M2M service consumer 24 can connect.
  • the M2M service consumer 24 is a user of the M2M service.
  • the M2M server 23 may be inside or outside a connectivity service network (CSN) and may provide specific M2M services to one or more 802.16 M2M devices 28.
  • the ASN may include an IEEE 802.16 base station 22.
  • the M2M application is operated based on the 802.16 M2M device 28 and the M2M server 23.
  • the basic M2M service system architecture 20 supports two kinds of M2M communication, one of M2M communication between one or more 802.16 M2M devices and M2M server, or point-to-multipoint communication between 802.16 M2M devices and IEEE 802.16 base station. do.
  • the basic M2M service system architecture of FIG. 2 allows an 802.16 M2M device to act as an aggregation point for a non-IEEE 802.16 M2M device.
  • Non-IEEE 802.16 M2M devices use a wireless interface different from IEEE 802.16, such as IEEE 802.11, IEEE 802.15 or PLC. At this time, the change of the air interface of the non-IEEE 802.16 M2M device to IEEE 802.16 is not allowed.
  • an 802.16 M2M device may operate as an aggregation point for a non-IEEE 802.16 M2M device and may also operate as an aggregation point for an 802.16 M2M device.
  • the wireless interface may be changed to IEEE 802.16 in order to perform the aggregation function for the 802.16 M2M device and the non-802.16 M2M device.
  • an enhanced M2M service system architecture may support peer-to-peer (P2P) connections between 802.16 M2M devices, where the P2P connections may be over IEEE 802.16 or over another wireless interface such as IEEE 802.11, IEEE 802.15, or PLC. Can be connected.
  • P2P peer-to-peer
  • FIG. 4 shows an example of a frame structure of IEEE 802.16e.
  • the TDD frame includes a DL transmission period and a UL transmission period.
  • the downlink transmission period is preceded in time by the uplink transmission period.
  • the DL transmission period includes a preamble, a frame control header (FCH), a DL-MAP, a UL-MAP, and a DL burst region.
  • the UL transmission period includes a ranging subchannel and an UL burst region.
  • a guard time for distinguishing the DL transmission period from the UL transmission period is inserted in the middle part (between the DL transmission period and the UL transmission period) and the last part (after the UL transmission period) of the frame.
  • TGT Transmit / Receive Transition Gap
  • RMG Receive / Transmit Transition Gap
  • the preamble is used for initial synchronization, cell search, frequency offset, and channel estimation between the base station and the terminal.
  • the FCH includes the length of the DL-MAP message and the coding scheme information of the DL-MAP.
  • DL-MAP is an area where a DL-MAP message is transmitted.
  • DL-MAP messages define a connection to a DL channel. This means that the DL-MAP message defines the indication and / or control information for the DL channel.
  • the DL-MAP message includes a configuration change count of the downlink channel descriptor (DDC) and a base station identifier (ID). DCD describes a DL burst profile that is applied to the current map.
  • DDC downlink channel descriptor
  • ID base station identifier
  • the DL burst profile refers to the characteristics of the DL physical channel, and the DCD is transmitted by the base station periodically through the DCD message.
  • the UL-MAP is an area in which the UL-MAP message is transmitted.
  • the UL-MAP message defines a connection to a UL channel. This means that the UL-MAP message defines the indication and / or control information for the UL channel.
  • the UL-MAP message includes a configuration change count of an uplink channel descriptor (UCD) and an allocation start time of UL allocation defined by UL-MAP.
  • UCD describes an UL burst profile.
  • the UL burst profile refers to the characteristics of the UL physical channel, and the UCD is periodically transmitted by the base station through a UCD message.
  • the DL burst is an area in which data transmitted from the base station to the terminal is transmitted
  • the UL burst is an area in which data transmitted from the base station to the terminal is transmitted.
  • the fast feedback region is included in the UL burst region of the frame.
  • the fast feedback area is used for transmission of information requiring a fast response from the base station.
  • the fast feedback region may be used for CQI transmission.
  • the position of the fast feedback region is determined by UL-MAP.
  • the position of the fast feedback region may be a fixed position within the frame or may be a variable position.
  • FIG 5 shows an example of a frame structure of IEEE 802.16m.
  • a superframe includes a superframe header (SFH) and four frames (frames, F0, F1, F2, and F3).
  • Each frame in the superframe may have the same length.
  • the size of each superframe is 20ms and the size of each frame is illustrated as 5ms, but is not limited thereto.
  • the length of the superframe, the number of frames included in the superframe, the number of subframes included in the frame, and the like may be variously changed.
  • the number of subframes included in the frame may be variously changed according to the channel bandwidth and the length of the cyclic prefix (CP).
  • CP cyclic prefix
  • One frame includes a plurality of subframes (subframe, SF0, SF1, SF2, SF3, SF4, SF5, SF6, SF7). Each subframe may be used for uplink or downlink transmission.
  • One subframe includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols or an orthogonal frequency division multiple access (OFDMA) in a time domain, and includes a plurality of subcarriers in the frequency domain. do.
  • the OFDM symbol is used to represent one symbol period, and may be called another name such as an OFDMA symbol or an SC-FDMA symbol according to a multiple access scheme.
  • the subframe may be composed of 5, 6, 7 or 9 OFDMA symbols, but this is only an example and the number of OFDMA symbols included in the subframe is not limited.
  • the number of OFDMA symbols included in the subframe may be variously changed according to the channel bandwidth and the length of the CP.
  • a type of a subframe may be defined according to the number of OFDMA symbols included in the subframe.
  • the type-1 subframe may be defined to include 6 OFDMA symbols
  • the type-2 subframe includes 7 OFDMA symbols
  • the type-3 subframe includes 5 OFDMA symbols
  • the type-4 subframe includes 9 OFDMA symbols.
  • One frame may include subframes of the same type. Alternatively, one frame may include different types of subframes.
  • the number of OFDMA symbols included in each subframe in one frame may be the same or different.
  • the number of OFDMA symbols of at least one subframe in one frame may be different from the number of OFDMA symbols of the remaining subframes in the frame.
  • a TDD scheme or a frequency division duplex (FDD) scheme may be applied to the frame.
  • each subframe is used for uplink transmission or downlink transmission at different times at the same frequency. That is, subframes in a frame of the TDD scheme are classified into an uplink subframe and a downlink subframe in the time domain.
  • each subframe is used for uplink transmission or downlink transmission at different frequencies at the same time. That is, subframes in the frame of the FDD scheme are divided into an uplink subframe and a downlink subframe in the frequency domain. Uplink transmission and downlink transmission occupy different frequency bands and may be simultaneously performed.
  • the SFH may carry essential system parameters and system configuration information.
  • the SFH may be located in the first subframe in the superframe.
  • SFH may occupy the last five OFDMA symbols of the first subframe.
  • the superframe header may be classified into primary SFH (P-SFH) and secondary SFH (S-SFH; secondary-SFH).
  • P-SFH primary SFH
  • S-SFH secondary SFH
  • the P-SFH may be transmitted every superframe.
  • Information transmitted to the S-SFH can be divided into three subpackets (S-SFH SP1, S-SFH SP2, S-SFH SP3). Each subpacket may be transmitted periodically with a different period. The importance of information transmitted through S-SFH SP1, S-SFH SP2, and S-SFH SP3 may be different from each other.
  • S-SFH SP1 may be transmitted in the shortest period, and S-SFH SP3 may be transmitted in the longest period.
  • S-SFH SP1 includes information on network re-entry, and the transmission period of S-SFH SP1 may be 40 ms.
  • S-SFH SP2 includes information about initial network entry and network discovery, and the transmission period of S-SFH SP2 may be 80 ms.
  • S-SFH SP3 includes the remaining important system information, and the transmission period of S-SFH SP3 may be either 160 ms or 320 ms.
  • One OFDMA symbol includes a plurality of subcarriers, and the number of subcarriers is determined according to the FFT size.
  • the types of subcarriers can be divided into data subcarriers for data transmission, pilot subcarriers for various measurements, guard bands and null carriers for DC carriers.
  • Parameters that characterize an OFDMA symbol are BW, N used , n, G, and the like.
  • BW is the nominal channel bandwidth.
  • N used is the number of subcarriers used (including DC subcarriers).
  • n is a sampling factor. This parameter is combined with BW and N used to determine subcarrier spacing and useful symbol time.
  • G is the ratio of CP time to useful time.
  • Table 1 below shows OFDMA parameters.
  • the OFDMA parameters of Table 1 may be equally used for the frame structure of 802.16e of FIG. 4.
  • T s ( ⁇ s) 102.857 144 115.2 102.857 102.857 FDD Number of ODFMA symbols per 5ms frame 48 34 43 48 48 Idle time ( ⁇ s) 62.857 104 46.40 62.857 62.857 TDD Number of ODFMA symbols per 5ms frame 47 33 42 47 47 TTG + RTG ( ⁇ s) 165.714 248 161.6 165.714 165.714 G 1/16 Symbol time, T s ( ⁇ s) 97.143 136 108.8 97.143 97.143 97.143
  • the idle mode is a mechanism that allows the terminal to periodically receive DL broadcast traffic transmitted by the base station without registering it with any particular base station.
  • a terminal can move freely between a plurality of base stations over a geographically wide area.
  • the terminal can obtain a gain that does not need to satisfy the requirements for handover between base stations (HO; handover).
  • HO handover
  • the terminal only scans, thus saving power and resources.
  • the network and the base station can easily and easily inform that the terminal has DL traffic according to the setting of the idle mode, and can remove the air interface and network handover from the inactive terminal.
  • the idle mode may include a paging interval (PI) and a paging unavailable interval (PUI).
  • PI paging interval
  • PTI paging unavailable interval
  • the base station does not transmit any DL traffic or paging message to the terminal during the non-pageable period.
  • the terminal may power off, search for neighboring base stations, select a preferred base station, attempt ranging when UL data to be transmitted occurs, or the terminal transmits DL traffic Other actions may be taken that do not guarantee availability to the base station.
  • the base station may limit a section in which a specific M2M device may attempt to access according to the load status of the base station. Due to the nature of M2M communication, the M2M device transmits a small amount of data for a relatively short time, and the data transmitted by the M2M device has a characteristic of delay tolerance that does not cause much problem even if it is delayed to some extent. Accordingly, even if the connection of the M2M device is restricted for a certain period, the quality of service (QoS) satisfaction due to data transmission may not be significantly affected.
  • QoS quality of service
  • the non-paging period of the idle mode may be used to limit the connection of the M2M device.
  • the proposed uplink data transmission method will be described through an embodiment.
  • the present invention proposes a method for selectively limiting a ranging request for network re-entry during an unpaging period for an M2M device operating in an idle mode.
  • FIG 6 shows an embodiment of the proposed uplink data transmission method.
  • the base station may optionally instruct the M2M device to allow or restrict the UL access attempt during the non-pageable period.
  • the base station may transmit a UL access indicator to the M2M device.
  • the UL connection indicator may be transmitted in various processes.
  • the base station may transmit a UL access indicator to the M2M device in the capacity negotiation process during the initial network entry (initial network entry) of the terminal.
  • the M2M device transmits a capacity negotiation request message to the base station.
  • the base station transmits a UL access indicator together with the capacity negotiation response message to the M2M device.
  • the UL connection indicator may be transmitted according to the characteristics of the M2M device such as delay tolerance.
  • the base station may transmit the UL access indicator to the M2M device in the idle mode entry step.
  • the M2M device transmits an idle mode request message to the base station.
  • the base station transmits the UL access indicator together with the idle mode response message to the M2M device.
  • the base station may transmit the UL access indicator to the M2M device through a paging message while operating in the idle mode.
  • step S120 while transmitting an M2M group paging advertisement (M2M group paging advertisement) message to the M2M device to the base station and also transmits the UL access indicator.
  • M2M group paging advertisement M2M group paging advertisement
  • step S130 the M2M device transmits the UL data to the base station only during the paging interval and / or the non-paging interval allowed for UL connection based on the received UL access indicator.
  • FIG. 7 shows an example of an UL access restriction interval set according to the proposed uplink data transmission method.
  • a disabled state is defined in which a UL connection is not allowed separately from an active mode or an idle mode. That is, UL connection of the M2M device is allowed in the available state (AS), and UL connection of the M2M device is not allowed in the impossible state. Possible states can be included in active mode and / or idle mode.
  • the base station may control the UL connection of the M2M device. For example, the base station may define an impossible state of the M2M device in M2M group units.
  • the enabled state and the disabled state may be set periodically.
  • the base station may define a time duration during which the enable state and the disable state transition using a timer without separate signaling.
  • an UL unavailable interval is selectively defined during the non-paging interval of the idle mode.
  • a section in which UL access is restricted is referred to as a UL unavailable interval (UAI)
  • a section in which UL access is allowed is referred to as a UL available interval (AI). That is, in the non-pageable section, there is a section in which the UL connection of the M2M device is allowed and a section in which the UL connection is restricted.
  • the base station may instruct the M2M device to limit the UL connection for a certain period within the non-paging period within one paging cycle.
  • the UL non-paging period within the non-pageable period may be indicated in various ways.
  • the UL impossible interval may be indicated by an offset or a time interval.
  • the UL impossible section may be started after the indicated offset at the end of the paging segment.
  • the UL impossible section may be defined by the indicated time section. In this case, the UL impossible section is shorter than the impossible pageable section.
  • the UL impossible period may be defined by a bitmap.
  • the UL capable section and the UL impossible section may be expressed in the unit of a superframe by a bitmap. Assuming that the nonpageable period is 4 superframes, if the bitmap is '1000', UL access is allowed only in the first superframe, and the UL access is limited in the second to fourth superframes.
  • the paging segment of the idle mode is set as a UL capable segment
  • the nonpageable segment is set as a UL non-capable segment.
  • the UL access indicator may be transmitted to the M2M device through the M2M group paging message. That is, the UL impossible section set by FIG. 7- (c) may be commonly applied to a plurality of M2M devices belonging to the M2M group.
  • the UL connection indicator may be added in the form of a 1-bit parameter in the M2M group paging message. When the value of the UL access indicator is 1, all of the non-pageable periods may be defined as UL impossible periods.
  • the UL enabled section and the UL impossible section are selectively set flexibly in units of paging cycles.
  • FIG. 8 is an example of a UL capable section and a UL impossible section set in units of a paging period according to the proposed uplink data transmission method.
  • the ratio of the UL capable section and the UL impossible section is indicated by 1: 3. That is, the M2M device may attempt UL access in the non-pageable period during one paging period, and the UL connection is limited in the non-pageable period for three paging periods. In the non-UL period, even in the paging period, the UL connection of the M2M device may be restricted. The setting of the UL enabled section and the UL impossible section of the paging period unit may be maintained while the idle mode continues. The ratio of the UL capable section and the UL impossible section may be set statically or dynamically.
  • the ratio of the UL capable section and the UL impossible section may be changed for the access control of the M2M device.
  • the ratio of the UL capable section and the UL impossible section may be changed from 1: 3 to 2: 3.
  • the M2M device needs to check whether there is a change in the ratio of the UL capable section and the UL impossible section in the paging message.
  • the base station may set the UL impossible interval by transmitting a UL access indicator and a paging indicator every N paging cycles.
  • the UL access indicator defines a UL capable section and a UL impossible section, and the M2M device cannot perform network reentry on its own.
  • the base station may further transmit an offset to set the range of the UL impossible period.
  • the paging indicator indicates whether or not to transmit a paging message during a specific interval.
  • the M2M device does not need to receive the paging message in the non-pageable period.
  • the base station may further transmit an offset to set the range of the non-pageable period.
  • the paging indicator may be sent separately from the UL connection indicator and may be sent only if the UL connection is limited by the UL connection indicator.
  • N may be transmitted as included in an M2M group paging message, and may be preset in each M2M group and informed by a base station when entering a network. If the M2M device does not receive a paging message that includes a UL access indicator and / or a paging indicator, the M2M device may attempt to connect to the UL but the base station may reject it and the M2M device may additionally enter the network. Do not perform. The M2M device receives a paging message every paging period.
  • the impossible state or the UL impossible period may be set in various ways.
  • the base station may select one of the above-described methods according to the characteristics of the M2M application to set the impossible state or the UL impossible period. For example, in the case of an M2M application having a delay tolerance characteristic, power consumption can be minimized by setting the non-pageable period to an UL non-able period according to the method of 3) above.
  • the UL connection priority of the M2M device may be determined to prevent connection congestion of the M2M device.
  • the base station may define a priority offset corresponding to the priority level as system information, and the M2M device may be assigned a priority level corresponding to the priority offset.
  • the system information may be either S-SFH SP2 or SP3.
  • the priority level may be assigned by the M2M device during the registration process or may be assigned during the service flow (SF) setting process.
  • the priority level may be given from the base station through the dynamic service flow addition request / response message (AAI-DSA-REQ / RSP).
  • the M2M device may request a desired priority level from the base station, and the base station may assign the requested priority level to the M2M device.
  • Table 2 shows an example of the priority offset added to the system information.
  • the priority offset may be directly transmitted to the M2M device through unicast signaling without defining a priority level.
  • the base station may set a priority criterion to allow only the access of the M2M device having a higher value than the corresponding level.
  • the parameter indicating this priority criterion may be included in a system setup descriptor message (AAI-SCD) or S-SFH SP1.
  • Table 3 shows an example of the priority criteria parameter.
  • Priority level 2 bits Indicates the priority criteria assigned to the M2M device. For example, if the priority criterion is set to 2, access to an M2M device having a priority level of 2 or more is restricted. Used to limit the access of certain M2M devices for load control of the base station.
  • the M2M device receives a UL access indicator from a base station that sets a UL impossible period within a non-pageable period of the idle mode.
  • the M2M device transmits the UL data to the base station through at least one of the paging period of the idle mode and the UL possible period in the non-pageable period.
  • FIG. 10 is a block diagram of a wireless communication system in which an embodiment of the present invention is implemented.
  • the base station 800 includes a processor 810, a memory 820, and a radio frequency unit (RF) 830.
  • Processor 810 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 810.
  • the memory 820 is connected to the processor 810 and stores various information for driving the processor 810.
  • the RF unit 830 is connected to the processor 810 to transmit and / or receive a radio signal.
  • the M2M device 900 includes a processor 910, a memory 920, and an RF unit 930.
  • Processor 910 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 910.
  • the memory 920 is connected to the processor 910 and stores various information for driving the processor 910.
  • the RF unit 930 is connected to the processor 910 to transmit and / or receive a radio signal.
  • Processors 810 and 910 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
  • the memory 820, 920 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
  • the RF unit 830 and 930 may include a baseband circuit for processing a radio signal.
  • the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
  • the module may be stored in the memory 820, 920 and executed by the processor 810, 910.
  • the memories 820 and 920 may be inside or outside the processors 810 and 910, and may be connected to the processors 810 and 910 by various well-known means.

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

Abstract

L'invention concerne un procédé servant à des données en liaison montante dans un système de communication sans fil et un dispositif associé. Un dispositif M2M utilisé en mode inactif reçoit un indicateur d'accès UL qui définit un intervalle indisponible UL dans un intervalle de radiomessagerie du mode inactif, depuis une station de base, et transmet les données UL à une station de base à travers des intervalles de radiomessagerie du mode inactif et/ou des intervalles disponibles UL de l'intervalle de radiomessagerie indisponible.
PCT/KR2011/009904 2011-01-28 2011-12-21 Procédé servant à des données en liaison montante dans un système de communication sans fil et dispositif associé Ceased WO2012102487A1 (fr)

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WO2015111963A1 (fr) * 2014-01-23 2015-07-30 (주)휴맥스 홀딩스 Dispositif de planification dans une communication du type machine d'évolution à long terme (lte)
WO2016056839A1 (fr) * 2014-10-07 2016-04-14 엘지전자 주식회사 Procédé de fonctionnement d'un terminal m2m dans un système de communication sans fil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015111963A1 (fr) * 2014-01-23 2015-07-30 (주)휴맥스 홀딩스 Dispositif de planification dans une communication du type machine d'évolution à long terme (lte)
WO2016056839A1 (fr) * 2014-10-07 2016-04-14 엘지전자 주식회사 Procédé de fonctionnement d'un terminal m2m dans un système de communication sans fil
US10306438B2 (en) 2014-10-07 2019-05-28 Lg Electronics Inc. Operating method of M2M terminal in wireless communication system

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