WO2013055172A1 - 기기간 통신을 지원하는 시스템에서 시스템 정보를 송수신하는 방법 및 장치 - Google Patents
기기간 통신을 지원하는 시스템에서 시스템 정보를 송수신하는 방법 및 장치 Download PDFInfo
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- WO2013055172A1 WO2013055172A1 PCT/KR2012/008372 KR2012008372W WO2013055172A1 WO 2013055172 A1 WO2013055172 A1 WO 2013055172A1 KR 2012008372 W KR2012008372 W KR 2012008372W WO 2013055172 A1 WO2013055172 A1 WO 2013055172A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- 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 method for receiving and updating system information used in inter-device communication in a wireless access system supporting machine to machine (M2M).
- M2M machine to machine
- Inter-device communication means communication between the electronic device and the electronic device as it is. Broadly, it means wired or wireless communication between electronic devices or communication between a device controlled by a person and a machine. In recent years, however, it is generally referred to wireless communication between an electronic device and an electronic device performed without human involvement.
- M2M communication In the early 1990s, when the concept of M2M communication was first introduced, it was recognized as a concept of remote control or telematics, and the derived market itself was very limited. However, in the past few years, M2M communication has been rapidly gaining worldwide attention. Grew. Especially in point of sales (POS) and security-related applications markets, intelligent management that measures flow management, remote monitoring of machinery and equipment, uptime measurements on construction machinery, and automatic measurement of heat or electricity usage. It showed great influence in the field of (Smart Meter). M2M communication in the future will be utilized for more various purposes in connection with existing mobile communication and wireless high-speed Internet, or low-power communication solutions such as Wi-Fi and Zigbee, and will no longer be limited to the business-to-business market. It will be the foundation to expand into the market.
- POS point of sales
- Smart Meter Smart Meter
- M2M communication technology can be used in numerous devices and equipment such as automobiles, trucks, trains, containers, vending machines, gas tanks, and the like.
- M2M devices are very simple in structure and operate without human intervention, unlike conventional HTC terminals, that is, general terminals.
- M2M devices are usually installed in a fixed position and have low mobility. Therefore, M2M devices need long-term maintenance without consuming much power.
- a ranging method dedicated to an M2M device needs to be proposed, and various methods for supporting ranging dedicated to an M2M device should be considered together.
- the present invention has been made in order to satisfy the above-described requirements and an object of the present invention is to provide an efficient communication method for an M2M device.
- Another object of the present invention is to provide a method for efficiently transmitting and receiving messages related to system information in order to support ranging for M2M devices.
- Still another object of the present invention is to provide a method of changing only system information on M2M devices without affecting the general terminal in an environment in which the general terminal and the M2M device coexist.
- Another object of the present invention is to provide an apparatus supporting the above-described methods.
- the present invention provides various methods and apparatuses for receiving and updating system information used in inter-device communication in a wireless access system supporting machine to machine (M2M).
- M2M machine to machine
- a method for receiving system information about an M2M device in a wireless access system supporting M2M includes: a second secondary superframe header subpacket 3 in which the M2M device includes ranging information dedicated to M2M; (S-SFH SP3) receiving the first S-SFH SP3 message including the transmission period information is transmitted and the M2M device receiving the second S-SFH SP3 message based on the transmission period information and the second S- If the M2M dedicated ranging information included in the SFH SP3 message indicates that the system information for the M2M has been updated, the M2M device may include receiving a system configuration descriptor message including the updated system information.
- the M2M device for receiving the system information for the M2M device in a wireless access system that supports inter-device communication includes a radio frequency (RF) module and a processor for controlling the reception of system information can do.
- RF radio frequency
- the processor of the M2M device controls the RF module so that the first S-SFH SP3 including transmission period information through which the second secondary superframe header subpacket 3 (S-SFH SP3) message including the M2M-only ranging information is transmitted. If the message is received and the second S-SFH SP3 message is received based on the transmission period information, and the M2M-only ranging information included in the second S-SFH SP3 message indicates that the system information for the M2M is updated, the processor is updated.
- the RF module may be controlled to receive a system configuration descriptor message including the system information.
- the transmission period information may include an M2M dedicated ranging period field indicating the transmission period of the second S-SFH SP3 message.
- the transmission period information may further include an S-SFH change period field indicating a period in which contents included in the S-SFH are changed, and the M2M transmission ranging period field is based on the S-SFH change period field. It may indicate a transmission period of the SFH SP3 message.
- the transmission period information may indicate a transmission period of the second S-SFH SP3 message on the basis of the superframe in which the first S-SFH SP3 message is received.
- a method for receiving system information on an M2M device in a wireless access system supporting M2M communication includes an M2M device in a secondary superframe header subpacket 3 (S-SFH SP3) message.
- Receiving a primary superframe header (P-SFH) message including an M2M dedicated ranging indicator indicating whether the M2M dedicated ranging information is updated and the M2M dedicated ranging information If the M2M device receives the S-SFH SP3 message in the superframe in which the P-SFH message is received, and the M2M-only ranging information included in the S-SFH SP3 message is not included in the system information for the M2M device. If indicated, the M2M device may include receiving a system configuration descriptor message that includes the updated system information.
- the M2M device for receiving system information on the M2M device in a wireless access system that supports inter-device communication (M2M), the processor for controlling the reception of radio frequency (RF) module and system information It may include.
- M2M inter-device communication
- RF radio frequency
- the processor controls the RF module to include a primary super including an M2M dedicated ranging indicator indicating whether the M2M dedicated ranging information included in the secondary superframe header subpacket 3 (S-SFH SP3) message is updated.
- P-SFH Prey Header
- the P-SFH message may be received in every superframe.
- an efficient communication method for an M2M device may be provided in an environment in which a general terminal and an M2M device coexist.
- M2M devices decode Secondary Super Frame Header Sub-Packet 3 (S-SFH SP3) only at specific periods or at specific superframes, and decode S-SFH SP3 messages at all superframes. By not doing so, power consumption can be reduced.
- S-SFH SP3 Secondary Super Frame Header Sub-Packet 3
- the operation of the general terminal may be minimized and power consumption of the M2M device may be reduced.
- FIG. 1 is a diagram for schematically explaining a device configuration of an M2M device and a base station as an embodiment of the present invention.
- FIG. 2 is a diagram illustrating a method for transmitting and receiving an S-SFH message to a general terminal.
- 3 is a diagram illustrating a method for M2M devices to transmit and receive an S-SFH message.
- FIG. 4 is a diagram illustrating one method of updating system information by M2M devices according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating one method of updating system information by M2M devices according to an embodiment of the present invention.
- Embodiments of the present invention provide a method and apparatus for broadcasting a medium access control (MAC) control message in a wireless access system supporting an M2M environment.
- MAC medium access control
- 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 'mobile station' may be a user equipment (UE), a subscriber station (SS), a mobile subscriber station (MSS), a mobile terminal, an advanced mobile station (AMS) or a terminal. (Terminal), etc. may be substituted.
- the mobile station may be used in the same sense as the M2M device.
- 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 wireless access systems IEEE 802.xx system, 3GPP system, 3GPP LTE system and 3GPP2 system. That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents.
- communication between M2M devices means a communication type performed between the terminals via the base station, the base station and the terminals without human intervention, or a communication type between the M2M devices.
- the M2M device refers to a terminal capable of supporting communication of the M2M device as described above.
- An access service network for an M2M service is defined as an M2M ASN (M2M Access Service Network), and a network entity communicating with M2M devices is called an M2M server.
- the M2M server executes an M2M application and provides an M2M specific service for one or more M2M devices.
- An M2M feature is a feature of an M2M application, and one or more features may be needed to provide the application.
- An M2M device group refers to a group of M2M devices that share one or more features in common.
- M2M devices that communicate in an M2M fashion (ie, may be called variously, such as M2M devices, M2M communication devices, or Machine Type Communication (MTC) devices) may increase in number in a given network as the machine application type increases. Will gradually increase.
- MTC Machine Type Communication
- Device application types include (1) security, (2) public safety, (3) tracking and tracing, (4) payment, and (5) healthcare. (6) remote maintenance and control, (7) metering, (8) consumer devices, (9) point of sales and security-related applications.
- Fleet Management in the market (10) Vending Machine Communication between devices, (11) Remote monitoring of machinery and equipment, operating hours on construction machinery and intelligent metering to automatically measure heat or electricity usage. (Smart Meter), (12) Surveillance Video communication of surveillance cameras.
- the device application type need not be limited thereto, and various device application types may be applied.
- M2M device Other characteristics include low mobility of the M2M device or almost no movement once installed. This means that M2M devices are stationary for a fairly long time.
- An M2M communication system is a specific M2M with a fixed location, such as secured access and surveillance, public safety, payment, remote maintenance and control, metering, and so on. Mobility-related operations for the application can be simplified or optimized.
- the number of M2M communication devices may increase dramatically compared to the number of general mobile communication devices. Thus, if they all communicate with the base station individually, they can put a heavy load on the air interface and / or the network.
- M2M communication is applied to a wireless communication system (for example, P802.16e, P802.16m, P802.16.1b, P802.16p, etc.).
- a wireless communication system for example, P802.16e, P802.16m, P802.16.1b, P802.16p, etc.
- the present invention is not limited thereto and may be applied to other communication systems such as 3GPP LTE / LTE-A system.
- FIG. 1 is a diagram for schematically explaining a device configuration of an M2M device and a base station as an embodiment of the present invention.
- the M2M device 100 and the base station 150 may include radio frequency units (RF units) 110 and 160, processors 120 and 170, and optionally memories 130 and 180, respectively.
- RF units radio frequency units
- FIG. 1 illustrates a configuration of one M2M device and one base station, an M2M communication environment may be established between a plurality of M2M devices and a base station.
- Each RF unit 110, 160 may include a transmitter 111, 161 and a receiver 112, 162, respectively.
- the transmitter 111 and the receiver 112 of the M2M device 100 are configured to transmit and receive signals with the base station 150 and other M2M devices, and the processor 120 may be connected to the transmitter 111 and the receiver 112. Functionally connected, the transmitter 111 and the receiver 112 may be configured to control a process of transmitting and receiving signals with other devices.
- the processor 120 may perform various processing on the signal to be transmitted and then transmit the signal to the transmitter 111, and may perform the processing on the signal received by the receiver 112.
- the processor 120 may store information included in the exchanged message in the memory 130.
- the M2M device 100 may perform the method of various embodiments of the present invention to be described below.
- the M2M device 100 may include various additional components according to the device application type. For example, when the M2M device 100 is for intelligent metering, the M2M device 100 may include an additional configuration for power measurement, and the like, and the power measurement operation is illustrated in FIG. 1.
- the processor 120 may be controlled or may be controlled by a separately configured processor (not shown).
- FIG. 1 illustrates an example in which communication is performed between the M2M device 100 and the base station 150, the M2M communication method according to the present invention may also occur between one or more M2M devices, each of the devices The method according to the various embodiments described below may be performed in the same form as each device configuration shown in FIG. 1.
- Transmitter 161 and receiver 162 of base station 150 are configured to transmit and receive signals with other base stations, M2M servers, and M2M devices, and processor 170 is functional with transmitter 161 and receiver 162. Connected to, the transmitter 161 and the receiver 162 may be configured to control the process of transmitting and receiving signals with other devices. In addition, the processor 170 may perform various processing on the signal to be transmitted and then transmit the signal to the transmitter 161, and may perform the processing on the signal received by the receiver 162. If necessary, the processor 170 may store information included in the exchanged message in the memory 130. With this structure, the base station 150 may perform the methods of the various embodiments described above.
- Processors 120 and 170 of each of the M2M device 110 and the base station 150 instruct (eg, control, coordinate, manage, etc.) operation at the M2M device 110 and the base station 150, respectively.
- Each of the processors 120 and 170 may be connected to memories 130 and 180 that store program codes and data.
- the memories 130 and 180 are coupled to the processors 120 and 170 to store operating systems, applications, and general files.
- the processors 120 and 170 of the present invention may also be referred to as a controller, a microcontroller, a microprocessor, a microcomputer, or the like.
- the processors 120 and 170 may be implemented by hardware or firmware, software, or a combination thereof.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs Field programmable gate arrays
- firmware or software when implementing embodiments of the present invention using firmware or software, the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention.
- Firmware or software configured to be may be included in the processors 120 and 170 or may be stored in the memories 130 and 180 to be driven by the processors 120 and 170.
- a base station In a wireless access system, a base station periodically transmits a superframe header (SFH) including system information to a general terminal and / or an M2M device.
- SFH superframe header
- P-SFH Primary-SFH
- S-SFH Secondary-SFH
- the P-SFH is transmitted in every superframe, and the transmission period of the S-SFH may vary according to its type.
- P-SFH contains essential system information.
- System information included in the P-SFH includes an S-SFH change count field, an S-SFH scheduling information field, and an S-SFH SP change bitmap. Bitmap) field may be included.
- the S-SFH change count field indicates the value of the S-SFH change count associated with the S-SFH SPx IE
- the S-SFH scheduling information field indicates the type of S-SFH included in the corresponding superframe
- the SFH SP Change Bitmap field indicates whether there is a change in the S-SFH SPx IE between the current SFH and the previous SFH.
- the S-SFH includes essential system information and system configuration information.
- S-SFH is classified into three types: S-SFH SP1, S-SFH SP2, and S-SFH SP3.
- the three types of S-SFH SPx are transmitted at different timings at different periods. For example, the transmission period of S-SFH SPx is in order of SP1 ⁇ SP2 ⁇ SP3.
- Table 1 below shows an example of an S-SFH SP3 Information Element (IE) format applied to embodiments of the present invention.
- IE Information Element
- Table 1 construction Size (bits) Contents ... ... ... SCD Count 4 A CC-related system configuration and AAI-SCD for a general terminal is shown. ... ... ... M2M SCD Count 4 Increments whenever the contents of dedicated ranging information for M2M devices are changed. This value varies between 0 and 15, i.e. represents the CCC associated with the AAI-SCD system configuration for the M2M device.
- Multiplexing factor of dedicated ranging code 3 Indicates the multiplexing ratio of the dedicated ranging code 0b001: 10b001: 1 / 20b001: 1 / 40b001: 1 / 80b001: 1 / 160b001: 1 / 320b001: 1 / 640b001: 1/128 ... ... ...
- S-SFH SP3 includes an SCD count field, an M2M SCD Count field, and a Multiplexing Factor of Dedicated Ranging Code field as system information. can do.
- the SCD count field indicates a configuration change count (CCC) related to the system configuration of an AAI-SCD (AAI-System Configuration Descriptor) message for a general terminal
- the M2M SCD count field indicates an AAI-SCD (for a M2M device).
- the multiplexing index field of the dedicated ranging code indicates the multiplexing rate of the dedicated ranging code.
- AAI-System Configuration Descriptor (AAI-SCD) messages are sent periodically by the base station to define the system configuration.
- the Configuration Change Count (CCC) included in the AAI-SCD message is incremented whenever the contents of the AAI-SCD message change.
- the base station indicates the fact that the AAI-SCD message has been changed by using the S-SFH related fields included in the P-SFH and the SCD count in the S-SFH SP3 message.
- the base station updates the SCD count and transmits an S-SFH SP3 message. Thereafter, when the terminal receives the S-SFH SP3 and recognizes that the SCD count is different from the previous SCD count, the terminal may receive the AAI-SCD message transmitted afterwards to obtain information about the changed system configuration.
- FIG. 2 is a diagram illustrating a method for transmitting and receiving an S-SFH message to a general terminal.
- the base station transmits the P-SFH in the first subframe of the first frame of every superframe. At this time, when the contents of the S-SFH SP3 is changed, the P-SFH including the updated S-SFH change count field is transmitted (S210).
- the base station transmits an S-SFH SP3 message including the updated SCD count to the terminal (S220).
- the UE Upon receiving the S-SFH SP3 message, the UE decodes the SCD count field included in the S-SFH SP3 message and compares it with the previous SCD count stored therein. If the value of the SCD count field included in the S-SFH SP3 message is different from the value of the stored SCD count field, the UE recognizes that the information about the system configuration included in the AAI-SCD message has been changed. AAI-SCD message transmitted from the base station is received (S230).
- 2 is related to an S-SFH SP3 message transmission and reception method performed when system information is changed between a general terminal and a base station in a cellular system.
- 3 is a diagram illustrating a method for M2M devices to transmit and receive an S-SFH message.
- the base station transmits the P-SFH in the first subframe of the first frame of every superframe. At this time, when the contents of the S-SFH SP3 is changed, the P-SFH including the updated S-SFH change count field is transmitted (S310).
- the base station transmits an S-SFH SP3 message including the updated SCD count to the M2M devices (S320).
- the M2M device receiving the S-SFH SP3 message decodes the M2M SCD count field included in the S-SFH SP3 message and compares it with the previous M2M SCD count stored in the M2M device. If the value of the M2M SCD count field included in the S-SFH SP3 message and the value of the M2M SCD count field stored by the M2M device are different, the M2M device may change the information about the system configuration included in the AAI-SCD message. Recognize that it is, and receives the AAI-SCD message transmitted from the base station (S330).
- M2M devices need to decode S-SPH SP3 only when the M2M SCD count field included in S-SHF SP3 is changed by receiving S-SHF SP3.
- M2M devices require extremely low power consumption depending on the type (eg, sensor device) and do not always decode S-SFH SP3, when the ranging information dedicated to M2M devices is updated, the M2M SCD is updated. I don't know exactly if the count is updated.
- FIG. 4 is a diagram illustrating one method of updating system information by M2M devices according to an embodiment of the present invention.
- the base station may transmit the S-SFH SP3 message at a specific period.
- dedicated ranging information eg, M2M SCD counter field
- the base station may transmit a S2SFH SP3 message including a Period of M2M dedicated ranging field (S410).
- S410 Period of M2M dedicated ranging field
- the M2M device obtains M2M SCD count information according to the periodic configuration based on the S-SFH SP3 change cycle to which the S-SFH SP3 message received last or most recently (ie, initial network entry phase) belongs.
- the next S-SFH SP3 decoding time can be determined.
- Table 2 below shows an example of a new S-SFH SP3 format applicable to embodiments of the present invention.
- the S-SFH SP3 message may include an S-SFH change cycle field and an M2M dedicated ranging period field as period information.
- the S-SFH change period field indicates the minimum interval in which the contents of the S-SFH remain the same. For example, if the S-SFH Change Period field is set to 0b000, the contents of the S-SFH remain the same for 16 superframes; if it is set to 0b001, it remains the same for 32 superframes; if it is set to 0b010, 64 superframes. Remain the same. Accordingly, the M2M device does not need to decode the S-SFH SP3 message again during the period indicated by the S-SFH change period field.
- the period for M2M device to decode S-SFH SP3 message is 1 S-SFH change period, when it is set to 0b001 2 S-SFH change period, and it is set to 0b010 4 S-SFH change cycle. If set to 0b011, 8 S-SFH change cycle.
- the S-SFH capable of decoding the next M2M SCD count field based on the superframe to which the most recently received S-SFH SP3 message belongs without applying the S-SFH change cycle as a reference. It can inform the decoding time of the SP3 message.
- Table 3 below shows another example of the new S-SFH SP3 format applicable to the embodiments of the present invention.
- M2M dedicated Ranging (M2M SCD count) 3 Indicates a period for the M2M device to decode S-SFH SP3 including M2M dedicated ranging information (or M2M SCD count).
- M2M SCD count 16 superframe
- 0b001 32 superframe
- 0b010 64 superframe
- 0b011 to 0b111 Reserved ... ... ...
- an M2M dedicated ranging period field may be included in the S-SFH SP3 message as period information.
- the M2M dedicated ranging period field is set to 0b000, it indicates that the S-SFH SP3 message is transmitted in 16 superframe periods, and if it is set to 0b001, it is transmitted in 32 superframe periods, and if it is set to 0b010, it is transmitted in 64 superframe periods.
- the M2M device may receive the S-SFH SP3 message in a period indicated by the M2M dedicated ranging period field based on the latest superframe that received the S-SFH SP3 message (that is, the superframe in which the S410 step is performed). .
- the M2M device may receive an S-SFH SP3 message in which M2M SCD count or M2M dedicated ranging information is updated in period T by decoding the period information included in the S-SHF SP3 message ( S420).
- the M2M device may determine whether to receive the AAI-SCD message by decoding the M2M SCD count information or the M2M dedicated ranging information (S430).
- the M2M device may receive an AAI-SCD message to obtain updated system configuration information (S440).
- the M2M device decodes the S-SFH change period field and the M2M dedicated ranging period field of Table 2 or decodes the M2M dedicated ranging period field of Table 3, whereby the system configuration information for the M2M device is changed. Only SP3 messages can be decoded.
- the M2M device does not need to decode all the S-SFH SP3 messages, and can decode the S-SFH SP3 message only in a period determined based on the M2M dedicated ranging period field. have. By doing so, even in an environment in which the general terminal and the M2M device coexist, the operation of the general terminal may be minimized and power consumption of the M2M device may be reduced.
- the period in which the M2M SCD count is updated may be set to be equal to the S-SFH SP3 decoding period of the M2M device.
- the S-SFH SP3 decoding period of the M2M device can be set independently of the period in which the M2M SCD count is actually updated (see Tables 2 and 3).
- the update period of the M2M SCD count may be set to be the same as the period in which the M2M device decodes the S-SFH SP3 message.
- allocation of dedicated ranging information for all M2M devices through the AAI-SCD message for M2M devices is applied based on the period information set by the system through S-SFH SP3, and the decoding of the M2M device is performed.
- the process may be performed based on the cycle information thus set.
- FIG. 5 is a diagram illustrating one method of updating system information by M2M devices according to an embodiment of the present invention.
- the base station may transmit a 1-bit indicator to the P-SFH to indicate the S-SFH SP3 message in which the M2M dedicated ranging information (eg, the M2M SCD count field) is updated ( S510).
- the M2M dedicated ranging information eg, the M2M SCD count field
- Table 4 below shows an example of a P-SFH message format that can be applied to embodiments of the present invention.
- the M2M dedicated ranging indicator indicates whether M2M dedicated ranging information (eg, M2M SCD counter) included in S-SFH SP3 is updated. For example, when the M2M dedicated ranging indicator is set to 0b0, it indicates that the M2M dedicated ranging information is updated. When set to 0b1, it indicates that the M2M dedicated ranging information is not updated.
- M2M dedicated ranging information eg, M2M SCD counter
- M2M devices must decode P-SFH messages in every superframe. Therefore, the M2M devices decode the M2M dedicated ranging indicator field included in the P-SFH message, and when the M2M dedicated ranging indicator field is set to 0b0, the M2M devices are updated within the S-SFH change period that receives the corresponding P-SFH. You just need to receive the S-SFH SP3 message.
- the M2M device may determine whether M2M dedicated ranging information is updated based on the M2M dedicated ranging indicator field. That is, when the M2M dedicated ranging indicator field is set to 0b0, the M2M devices may determine whether to receive the updated S-SFH SP3 message (S520).
- the M2M device may receive the S-SFH SP3 message including the M2M SCD count updated within the S-SFH change period in which the P-SFH message is received. (S530).
- the M2M device may determine whether the M2M SCD count included in the S-SFH SP3 message is equal to the value of the M2M SCD count stored therein. If the M2M SCD count value included in the S-SFH SP3 message is different from the M2M SCD count value stored by the M2M device, the M2M device determines that the system configuration information included in the AAI-SCD message has been changed. Accordingly, the M2M device may acquire the changed system configuration information by receiving the AAI-SCD message (S550).
- the existing general terminals may ignore the M2M dedicated ranging indicator field included in the P-SFH message and perform operations according to the method defined in the IEEE 802.16m system.
- the M2M device does not need to decode all the S-SFH SP3 messages, and can decode the S-SFH SP3 message only in a superframe indicated by the M2M dedicated ranging indicator field. . By doing so, even in an environment in which the general terminal and the M2M device coexist, the operation of the general terminal may be minimized and power consumption of the M2M device may be reduced.
- 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 the technical field to which the various radio access systems are applied.
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Abstract
Description
구문 | 크기(비트) | 내용 |
… | … | … |
SCD Count | 4 | 일반 단말에 대한 AAI-SCD와 시스템 구성과 관련된 CCC를 나타낸다. |
… | … | … |
M2M SCD Count | 4 | M2M 기기들에 대한 전용 레인징 정보의 내용이 변경될 때 마다 증가한다. 이 값은 0~15 사이에서 변경된다.즉, M2M 기기에 대한 AAI-SCD 시스템 구성과 관련된 CCC를 나타낸다. |
Multiplexing factor of dedicated ranging code | 3 | 전용 레인징 코드의 멀티플렉싱 비율을 나타냄0b001:10b001:1/20b001:1/40b001:1/80b001:1/160b001:1/320b001:1/640b001:1/128 |
… | … | … |
구문 | 크기(비트) | 내용 |
… | … | … |
S-SFH Change Cycle | 3 | S-SFH의 내용이 동일하게 유지되는 최소 구간을 나타낸다.0b000: 16 수퍼프레임0b001: 32 수퍼프레임0b010: 64 수퍼프레임0b011~0b111: Reserved |
… | … | … |
Periodicity of M2M dedicated Ranging (M2M SCD count) | 3 | M2M 기기가 M2M 전용 레인징 정보(또는, M2M SCD count)를 포함하는 S-SFH SP3을 디코딩하기 위한 주기를 나타낸다.0b000: 1 S-SFH 변경 주기0b001: 2 S-SFH 변경 주기0b010: 4 S-SFH 변경 주기0b011: 8 S-SFH 변경 주기0b100~0b111: Reserved |
… | … | … |
구문 | 크기(비트) | 내용 |
… | … | … |
Periodicity of M2M dedicated Ranging (M2M SCD count) | 3 | M2M 기기가 M2M 전용 레인징 정보(또는, M2M SCD 카운트)를 포함하는 S-SFH SP3을 디코딩하기 위한 주기를 나타낸다.0b000: 16 수퍼프레임0b001: 32 수퍼프레임0b010: 64 수퍼프레임0b011~0b111: Reserved |
… | … | … |
구문 | 크기(비트) | 내용 |
… | … | … |
M2M 전용 레인징 지시자 | 1 | S-SFH SP3에 포함되는 M2M 전용 레인징 정보가 갱신되는지 여부를 지시한다.0b0: 갱신0b1: 갱신되지 않음 |
… | … | … |
Claims (12)
- 기기간 통신(M2M)을 지원하는 무선접속 시스템에서 M2M 기기에 대한 시스템 정보를 수신하는 방법에 있어서,상기 M2M 기기가 M2M 전용 레인징 정보가 포함된 제2세컨더리 수퍼프레임 헤더 서브패킷3 (S-SFH SP3) 메시지가 전송되는 전송주기정보를 포함하는 제1S-SFH SP3 메시지를 수신하는 단계;상기 M2M 기기가 상기 전송주기정보에 기반하여 상기 제2S-SFH SP3 메시지를 수신하는 단계; 및상기 제2S-SFH SP3 메시지에 포함된 M2M 전용 레인징 정보가 상기 M2M에 대한 시스템 정보가 갱신된 것을 나타내면, 상기 M2M 기기는 상기 갱신된 시스템 정보를 포함하는 시스템 구성 서술자 메시지를 수신하는 단계를 포함하는, 시스템 정보 수신방법.
- 제1항에 있어서,상기 전송주기정보는 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는 M2M 전용 레인징 주기 필드를 포함하는, 시스템 정보 수신방법.
- 제2항에 있어서,상기 전송주기정보는 S-SFH에 포함된 내용이 변경되는 주기를 나타내는 S-SFH 변경 주기 필드를 더 포함하고,상기 M2M 전송 레인징 주기 필드는 상기 S-SFH 변경 주기 필드를 기반으로 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는, 시스템 정보 수신방법.
- 제2항에 있어서,상기 전송주기정보는 상기 제1S-SFH SP3 메시지를 수신한 수퍼프레임을 기준으로 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는, 시스템 정보 수신방법.
- 기기간 통신(M2M)을 지원하는 무선접속 시스템에서 M2M 기기에 대한 시스템 정보를 수신하는 방법에 있어서,상기 M2M 기기가 세컨더리 수퍼프레임 헤더 서브패킷3 (S-SFH SP3) 메시지에 포함되는 M2M 전용 레인징 정보가 갱신되는지 여부를 지시하는 M2M 전용 레인징 지시자를 포함하는 프라이머리 수퍼프레이 헤더(P-SFH) 메시지를 수신하는 단계;상기 M2M 기기는 상기 M2M 전용 레인징 지시가 상기 M2M 전용 레인징 정보가 생신됨을 지시하는 경우, 상기 P-SFH 메시지가 수신된 S-SFH 변경주기 내에서 에서 상기 S-SFH SP3 메시지를 수신하는 단계; 및상기 S-SFH SP3 메시지에 포함된 M2M 전용 레인징 정보가 상기 M2M 기기에 대한 시스템 정보가 갱신된 것을 나타내면, 상기 M2M 기기는 상기 갱신된 시스템 정보를 포함하는 시스템 구성 서술자 메시지를 수신하는 단계를 포함하는, 시스템 정보 수신방법.
- 제5항에 있어서,상기 P-SFH 메시지는 매 수퍼프레임에서 수신되는, 시스템 정보 수신방법.
- 기기간 통신(M2M)을 지원하는 무선접속 시스템에서 M2M 기기에 대한 시스템 정보를 수신하기 위한 상기 M2M 기기는,무선 주파수(RF) 모듈; 및상기 시스템 정보의 수신을 제어하기 위한 프로세서를 포함하되,상기 프로세서는 상기 RF 모듈을 제어하여 M2M 전용 레인징 정보가 포함된 제2세컨더리 수퍼프레임 헤더 서브패킷3 (S-SFH SP3) 메시지가 전송되는 전송주기정보를 포함하는 제1S-SFH SP3 메시지를 수신하고,상기 전송주기정보에 기반하여 상기 제2S-SFH SP3 메시지를 수신하며;상기 제2S-SFH SP3 메시지에 포함된 M2M 전용 레인징 정보가 상기 M2M에 대한 시스템 정보가 갱신된 것을 나타내면, 상기 프로세서는 상기 갱신된 시스템 정보를 포함하는 시스템 구성 서술자 메시지를 수신하도록 상기 RF 모듈을 제어하는, M2M 기기.
- 제7항에 있어서,상기 전송주기정보는 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는 M2M 전용 레인징 주기 필드를 포함하는, M2M 기기.
- 제8항에 있어서,상기 전송주기정보는 S-SFH에 포함된 내용이 변경되는 주기를 나타내는 S-SFH 변경 주기 필드를 더 포함하고,상기 M2M 전송 레인징 주기 필드는 상기 S-SFH 변경 주기 필드를 기반으로 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는, M2M 기기.
- 제8항에 있어서,상기 전송주기정보는 상기 제1S-SFH SP3 메시지를 수신한 수퍼프레임을 기준으로 상기 제2S-SFH SP3 메시지의 전송 주기를 나타내는, M2M 기기.
- 기기간 통신(M2M)을 지원하는 무선접속 시스템에서 M2M 기기에 대한 시스템 정보를 수신하기 위한 상기 M2M 기기는,무선 주파수(RF) 모듈; 및상기 시스템 정보의 수신을 제어하기 위한 프로세서를 포함하되,상기 프로세서는 상기 RF 모듈을 제어하여:세컨더리 수퍼프레임 헤더 서브패킷3 (S-SFH SP3) 메시지에 포함되는 M2M 전용 레인징 정보가 갱신되는지 여부를 지시하는 M2M 전용 레인징 지시자를 포함하는 프라이머리 수퍼프레이 헤더(P-SFH) 메시지를 수신하고;상기 M2M 전용 레인징 지시가 상기 M2M 전용 레인징 정보가 생신됨을 지시하는 경우, 상기 P-SFH 메시지가 수신된 S-SFH 변경주기 내에서 상기 S-SFH SP3 메시지를 수신하며; 및상기 S-SFH SP3 메시지에 포함된 M2M 전용 레인징 정보가 상기 M2M 기기에 대한 시스템 정보가 갱신된 것을 나타내면, 상기 프로세서는 상기 갱신된 시스템 정보를 포함하는 시스템 구성 서술자 메시지를 수신하도록 상기 RF 모듈을 제어하는, M2M 기기.
- 제11항에 있어서,상기 P-SFH 메시지는 매 수퍼프레임에서 수신되는, M2M 기기.
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