WO2010120126A2 - Procede permettant d'obtenir des informations d'attribution de ressources et dispositif terminal mettant en oeuvre ce procede - Google Patents

Procede permettant d'obtenir des informations d'attribution de ressources et dispositif terminal mettant en oeuvre ce procede Download PDF

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Publication number
WO2010120126A2
WO2010120126A2 PCT/KR2010/002325 KR2010002325W WO2010120126A2 WO 2010120126 A2 WO2010120126 A2 WO 2010120126A2 KR 2010002325 W KR2010002325 W KR 2010002325W WO 2010120126 A2 WO2010120126 A2 WO 2010120126A2
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WIPO (PCT)
Prior art keywords
frequency band
allocated
subbands
remaining
bandwidth
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PCT/KR2010/002325
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English (en)
Korean (ko)
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WO2010120126A3 (fr
Inventor
최진수
곽진삼
조한규
문성호
Original Assignee
엘지전자 주식회사
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Priority claimed from KR1020100034377A external-priority patent/KR20100114474A/ko
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2010120126A2 publication Critical patent/WO2010120126A2/fr
Publication of WO2010120126A3 publication Critical patent/WO2010120126A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a method for obtaining resource allocation information and a terminal device using the same.
  • a frame in the Institute of Electrical and Electronics Engineers (IEEE) 802.16m system, one of the Advanced Air Interface (AAI) systems, a frame includes a plurality of subframes, and the subframe includes a plurality of subcarriers on a frequency axis and a time axis. Includes a plurality of OFDM symbols. Some of the plurality of subframes included in one frame are used for transmitting uplink data, and others are used for transmitting downlink data.
  • the frame structure of the IEEE 802.16m system will be briefly described.
  • FIG. 1 is a diagram illustrating a basic frame structure in an IEEE 802.16m system.
  • each 20ms superframe is divided into four equally sized 5ms frames.
  • the 5 ms frame has one channel bandwidth of 5 MHz, 10 MHz, and 20 MHz, and each 5 ms radio frame may consist of seven or eight subframes, depending on the channel bandwidth.
  • One subframe may be allocated for downlink or uplink transmission.
  • One subframe may consist of different numbers of orthogonal frequency division multiple access (OFDMA) symbols according to channel bandwidth.
  • the first type subframe may be defined as a subframe consisting of six OFDMA symbols
  • the second type subframe may be defined as a subframe consisting of seven OFDMA symbols
  • the third type subframe may be defined as a subframe consisting of five OFDMA symbols. .
  • the base station may transmit system information and control information to the terminal using a control channel in a frame structure, and may transmit data in a frame region except for the remaining control channels.
  • the control channel through which the base station transmits control information to the terminal includes a superframe header (SFH), an advanced-MAP (A-MAP), and the like.
  • the superframe header includes a primary superframe header (P-SCH) and a secondary superframe header (S-SFH).
  • the superframe header is a channel used for broadcasting essential or additional system information to the terminal. That is, the base station transmits a superframe header to the terminal, which may be helpful when the terminal is initially powered on by entering the network, reentering the network, or performing a handover as the terminal moves.
  • the superframe header in the frame structure may be distributed and transmitted at the beginning of each superframe.
  • the superframe header may be locally allocated and located in a specific region in a frame structure in a specific resource allocation method.
  • An object of the present invention is to provide a method for obtaining resource allocation information.
  • Another object of the present invention is to provide a terminal device for acquiring resource allocation information.
  • a method for obtaining resource allocation information wherein subband number information allocated to data subframes, which are subframes not including the superframe header, is obtained from a base station through a superframe header.
  • the second frequency band is based on the received subband number information and a bandwidth of a second frequency band, which is a remaining frequency band except a first frequency band to which the superframe header is allocated and a preset total system bandwidth.
  • Calculating a number of subbands in the second frequency band based on the calculated number of subbands in the second frequency band and the number of physical resource units (PRUs) corresponding to a bandwidth preset to the second frequency band. Calculating the number of allocated minibands.
  • PRUs physical resource units
  • Each subband allocated to the second frequency band according to a preset rule consists of four PRUs and is used for a Contiguous Resource Unit (CRU), and each miniband allocated to the second frequency band consists of one PRU. Can be used as a Distributed Resource Unit (DRU).
  • CRU Contiguous Resource Unit
  • DRU Distributed Resource Unit
  • the method may further include decoding one or more subframes included in the second frequency band based on the number of CRUs and the number of DRUs allocated to the second frequency band.
  • the terminal apparatus for acquiring resource allocation information includes an assignment of data subframes that are subframes that do not include the superframe header through a superframe header from a base station.
  • An RF unit for receiving inverse number information Subbands of the second frequency band based on the received subband number information and a bandwidth of the second frequency band, which is the remaining frequency band except the first frequency band to which the superframe header is allocated and the preset total system bandwidth.
  • the number of mini-bands allocated to the second frequency band based on the calculated number of subbands of the second frequency band and the number of physical resource units (PRUs) corresponding to the bandwidth preset to the second frequency band.
  • PRUs physical resource units
  • Each subband allocated to the second frequency band according to a preset rule consists of four PRUs and is used for a Contiguous Resource Unit (CRU), and each miniband allocated to the second frequency band consists of one PRU. Can be used as a Distributed Resource Unit (DRU).
  • CRU Contiguous Resource Unit
  • DRU Distributed Resource Unit
  • the processor may decode one or more subframes included in the second frequency band based on the number of CRUs and the number of DRUs allocated to the second frequency band.
  • the UE Upon receiving the resource allocation information according to the present invention, the UE calculates the number of subbands and the number of minibands (or the number of CRUs and the number of DRUs) used in a specific frequency band, and the sub-band included in the specific frequency band based on the information. Decoding the frames can significantly improve throughput efficiency in the system.
  • FIG. 1 is a diagram illustrating a basic frame structure in an IEEE 802.16m system
  • FIG. 2 is a frame structure for explaining an example of a method for the UE to know resource allocation information for the remaining area to which the superframe header is not allocated, and
  • FIG 3 is a diagram showing the components of the apparatus 50 according to the invention.
  • a terminal collectively refers to a mobile or fixed user terminal device such as a user equipment (UE), a mobile station (MS), an advanced mobile station (AMS), and the like.
  • the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a Base Station, and an Access Point (AP).
  • UE user equipment
  • MS mobile station
  • AMS advanced mobile station
  • AP Access Point
  • a user equipment may receive information from a base station through downlink, and the terminal may also transmit information through uplink.
  • the information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.
  • the downlink control channels contain essential information necessary for the operation of the IEEE 802.16m system.
  • Information on the downlink control channel is transmitted hierarchically on different time scales from the superframe level to the advanced air interface (AAI) subframe level.
  • AAI advanced air interface
  • the terminal may access the system without decoding the wirelessMAN-OFDMA FCH and MAP messages.
  • the base station transmits the essential system parameters and system configuration information in the superframe header (SFH) to the terminal.
  • FIG. 2 is a frame structure for explaining an example of a method for a UE to know resource allocation information for the remaining area where a superframe header is not allocated.
  • the system bandwidth 200 may exist in various ways, such as 10 MHz and 20 MHz. However, in the present invention, for convenience of description, the system bandwidth is assumed to be 10 MHz as an example.
  • the superframe header occupies a minimum bandwidth 210 of 5 MHz.
  • the system bandwidth of the remaining areas 220 and 230 in which the superframe header is not located among the system bandwidths 200 is 5 MHz.
  • the superframe header region 210 located at the center of the system bandwidth 200 in the physical region may be mapped to the superframe header frequency band 240 illustrated in FIG. 2 in the logical region.
  • the remaining regions 220 and 230 in which the superframe header is not located may be mapped to the remaining frequency band 250 illustrated in FIG. 2.
  • the superframe header frequency band 240 may be subchannelized into a distributed resource unit (DRU).
  • the remaining frequency band 250 may be allocated to subbands and minibands.
  • the remaining frequency band 250 may carry data and control information.
  • DRU distributed resource unit
  • a subframe including a superframe header is defined as a term of a superframe header subframe, and a subframe is defined as a data subframe except a superframe header subframe within a specific superframe. . It is assumed that the remaining frequency domains 220 and 230 are allocated to subbands and minibands except the central physical 5MHz bandwidth resource region 210 to which the superframe header is allocated.
  • one subband is composed of four physical resource units (PRUs), one miniband is composed of one PRU, and in order to reduce unnecessary complexity, It is assumed that all subbands are used only as Contiguous Resource Units (CRUs) and all minibands are used as DRUs only.
  • PRUs physical resource units
  • the terminal may receive resource allocation information for the superframe header frequency band 240 and the remaining frequency band 250 from the base station.
  • the base station may inform their resource allocation information through a superframe header (main-superframe header (P-SFH), sub-superframe header (S-SFH)).
  • the base station may inform the terminal of the number of subbands used for resource allocation as resource allocation information.
  • the subband count information may be transmitted in the form of a Subband Allocation Count (SAC) value.
  • SAC Subband Allocation Count
  • the base station can inform the terminal of the number of subbands of the data subframe that does not include the superframe header.
  • the data subframe may be a data subframe immediately following the superframe header subframe, or may be a data subframe in a previous superframe.
  • the terminal can determine the resource allocation information for the remaining frequency band 250. That is, the number of subbands and the number of minibands (or the number of resource units of the CRU and the DRU) used in the remaining frequency band 250 may be proportionally scaled to the size of the remaining frequency band 250 relative to the system bandwidth. have.
  • the processor of the terminal may find out the number of subbands used in the remaining frequency band 250 by performing an operation as shown in Equation 1 below.
  • N SB_remaining floor (N SB_data ⁇ (bandwidth of other frequency bands / total system bandwidth))
  • the bandwidth of the remaining frequency band 250 is a bandwidth excluding the bandwidth 240 of the superframe header frequency band
  • N SB_remaining is the number of subbands allocated to the remaining frequency band 250
  • N SB_data is a data subframe resource region.
  • the number of allocated subbands, floor (), is the function that represents the largest integer less than or equal to the real value in parentheses.
  • the eight subbands in the data subframe correspond to 32 PRUs.
  • the UE may know that 32 PRUs (ie, 8 subbands) are allocated as subbands among the total 48 PRUs, and the remaining 16 PRUs are allocated as minibands. That is, the UE may know that 8 subbands are used as CRUs and 16 minibands are used as DRUs.
  • the CRU to DRU ratio of 2: 1 in the data subframe may be equally applied to the remaining frequency bands of the superframe header subframe.
  • 24 PRUs in the remaining frequency band 250 are allocated to a total of 4 subbands (or 16 PRUs) and 8 minibands (or 8 PRUs), 4 subbands being used as CRUs, and 8 mini
  • the band can be used as a DRU.
  • the processor of the terminal may determine the number of subbands used in the remaining frequency band 250 by performing the calculation as shown in Equation 2 below.
  • N SB_remaining ceil (N SB_data ⁇ (bandwidth in other frequency bands / total system bandwidth))
  • the bandwidth of the remaining frequency band 250 is a bandwidth excluding the bandwidth 240 of the superframe header frequency band
  • N SB_remaining is the number of subbands allocated to the remaining frequency band 250
  • N SB_data is a data subframe region 220.
  • Ceil () is the function that represents the smallest integer greater than or equal to the real value in parentheses.
  • Equation 2 is different from Equation 1 in that it calculates the number of subbands allocated to the remaining frequency band 250 using the ceil function.
  • the processor of the terminal may know the number of mini-bands allocated to the remaining frequency band 250 using the following equation (3).
  • N MB_remaining N PRU, remaing- (4 ⁇ N SB_remaining )
  • N MB_remaining represents the number of mini-bands used in the remaining frequency band 250
  • N PRU, remaing means the total number of PRU in the remaining frequency band 250
  • N SB_remaining is Equation 1 or The number of subbands allocated to the remaining frequency band 250 obtained in 2 is shown. It is assumed here that one subband consists of 4 PRUs.
  • the terminal applies the subband number (SAC) information allocated to the data subframe received through the superframe header (especially, the sub-superframe header) from the base station to the remaining frequency band 250 by applying the subband number (SAC) information.
  • SAC subband number
  • the number, number of mini-bands, etc. could be found.
  • the base station may inform the terminal of the ratio information of the CRU to the DRU in the data subframe instead of the subband number (SAC) information allocated to the data subframe.
  • the UE may determine the number of subbands by applying the ratio information of the CRU to the DRU in the data subframe to the remaining frequency band 250.
  • the subband number information or the ratio of CRU to DRU for resource allocation of the data subframe may be applied to each frequency partition, which may be transmitted to the terminal.
  • the number of subbands in the remaining frequency band 250 of the superframe header subframe may be applied using the number of subbands in all frequency partitions (ie, the sum of the number of subbands for each frequency partition) in the data subframe.
  • the number of subbands in one frequency partition (particularly, frequency of reuse-1 region) may be applied.
  • the number of subbands and the number of minibands in the remaining frequency bands 250 may be preset and applied to a specific value. That is, the number of subbands and the number of minibands in the remaining frequency band 250 may be a value predetermined by the system configuration. As a specific example, it may be applied by setting a specific value according to the radius of the cell. In an environment with a small cell radius or an indoor environment, the number of subbands may be relatively large and the number of minibands may be small. As a predetermined value, the ratio of subbands and minibands can be applied as follows. Once the ratio of subbands and minibands is determined, the number of subbands and minibands can be known according to the system bandwidth.
  • the ratio of subbands to minibands can be set to 2: 1 or 3: 1. In other circumstances, the ratio of subband number to miniband number may be set to 1: 1, 2: 1, or 3: 2.
  • the ratio of the number of subbands to the number of minibands is only one example and may exist in various ratios.
  • the ratio of the number of subbands and the number of minibands may be fixed to a specific value according to the system bandwidth. For example, allocate all PRUs in the remaining frequency partitions 250 corresponding to 5 MHz to the mini-band (24 mini-bands or 24 PRUs) at 10 MHz system bandwidth and the remaining frequency partitions 250 corresponding to 15 MHz at the 20 MHz system bandwidth. ) Can be assigned to a subband (18 subbands or 72 PRUs). In this way, all of the remaining frequency partitions 250 may be allocated as mini-bands or subbands only according to the system bandwidth. As another example, the ratio of the number of subbands and the number of minibands to the system bandwidth may be applied as 1: 1, 2: 1, or 3: 1.
  • a value corresponding to the number of subbands in the data subframe may be mapped to a value corresponding to the number of subbands in the remaining frequency partitions by using a specific table.
  • the number of subbands in the data subframe is ⁇ 12, 11, 10, 9, 8, 8, 7, 6, 5, 4, 3,2, 1, 0 ⁇ .
  • the number of subbands in the remaining frequency partition 250 may be mapped to any one of ⁇ 6, 5, 4, 3, 2, 1, 0 ⁇ .
  • the number of subbands in the remaining frequency partitions preset according to the number of subbands in the data subframe is a value calculated by using the ceil () function as shown in Equation 2 above.
  • FIG 3 is a diagram showing the components of the apparatus 50 according to the invention.
  • the apparatus 50 may be a terminal or a base station.
  • the device 50 includes a processor 51, a memory 52, a radio frequency unit (RF unit) 53, a display unit 54, and a user interface unit 55.
  • RF unit radio frequency unit
  • Layers of the air interface protocol are implemented in the processor 51.
  • the processor 51 provides a control plan and a user plan.
  • the function of each layer may be implemented in the processor 51.
  • Memory 52 is coupled to processor 51 to store operating systems, applications, and general files.
  • the display unit 54 displays various information and may use well-known elements such as a liquid crystal display (LCD) and an organic light emitting diode (OLED).
  • LCD liquid crystal display
  • OLED organic light emitting diode
  • the user interface unit 55 may be composed of a combination of well known user interfaces such as a keypad, a touch screen, and the like.
  • the RF unit 53 may be connected to the processor 51 to transmit and receive a radio signal.
  • the RF unit 53 may be divided into a processor transmission module (not shown) and a reception module (not shown).
  • the RF unit 53 may receive subband number information allocated to data subframes, which are subframes not including the superframe header, from the base station through the superframe header.
  • the processor 51 is a bandwidth of the second frequency band, which is the remaining frequency band except for the first subband to which the RF unit 53 receives the subband number information, a preset total system bandwidth, and the superframe header. Calculates the number of subbands in the second frequency band based on the calculated subbands of the second frequency band, and based on the calculated number of subbands in the second frequency band and a number of physical resource units (PRUs) corresponding to a bandwidth preset to the second frequency band. The number of minibands allocated to the second frequency band can be calculated.
  • PRUs physical resource units
  • the RF unit 53 may receive the number ratio information of the CRUs and the DRUs allocated to the data subframes through the superframe header from the base station.
  • the processor 51 applies the number ratio information of the CRUs and the DRUs allocated to the received data subframes to the bandwidth of the second frequency band, which is the remaining frequency band except the first frequency band to which the superframe header is allocated,
  • the ratio of the number of CRUs and DRUs of the second frequency band may be calculated using the bandwidth of the second frequency band set in FIG.
  • the processor 51 calculates the ratio of the number of CRUs and DRUs in the second frequency band, the number of subbands and minibands allocated to the second frequency band is calculated on the assumption that the subband is used only as the CRU and the miniband is used only as the DRU. Can be calculated.
  • the processor 51 may decode the second frequency band using the number of CRUs and the number of DRUs (or the number of subbands and the number of minibands) calculated for the second frequency band.
  • the layers of the air interface protocol between the terminal and the network are based on the lower three layers of the open system interconnection (OSI) model, which is well known in a communication system, for the first layer L1, the second layer L2, and the third layer. Can be classified as (L3).
  • the physical layer belongs to the first layer and provides an information transmission service through a physical channel.
  • the radio resource control (RRC) layer belongs to the third layer and provides control radio resources between the terminal and the network. The terminal and the network exchange RRC messages through the RRC layer.
  • each component or feature is to be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the 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. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment 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), FPGAs ( Field Programmable Gate Arrays), 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.
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • the method for acquiring resource allocation information and a terminal device using the same are applicable to a mobile communication system such as IEEE 802.16m.

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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 permettant d'obtenir des informations d'attribution de ressources, ainsi qu'un dispositif terminal mettant en oeuvre ce procédé. Le dispositif selon l'invention comprend une unité RF et un processeur. Par l'intermédiaire d'en-têtes de supertrame, l'unité RF reçoit d'une station de base des informations relatives au nombre de sous-bandes attribuées à des sous-trames de données qui ne contiennent pas les en-têtes de supertrame. Le processeur calcule le nombre de sous-bandes de deuxièmes bandes de fréquences en fonction : des informations reçues relatives au nombre de sous-bandes ; de largeurs de bande de système global préréglées ; et des largeurs de bande des deuxièmes bandes de fréquences qui sont les bandes de fréquences à l'exception des premières bandes de fréquences auxquelles sont attribués les en-têtes de supertrame. En outre, le processeur calcule le nombre de mini-bandes attribuées aux deuxièmes bandes de fréquences en fonction : du nombre calculé de sous-bandes de la deuxième bande de fréquences ; et du nombre d'unités de ressources physiques (PRU) correspondant aux largeurs de bande préréglées dans les deuxièmes bandes de fréquences.
PCT/KR2010/002325 2009-04-15 2010-04-15 Procede permettant d'obtenir des informations d'attribution de ressources et dispositif terminal mettant en oeuvre ce procede WO2010120126A2 (fr)

Applications Claiming Priority (6)

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US16968909P 2009-04-15 2009-04-15
US61/169,689 2009-04-15
US17011209P 2009-04-17 2009-04-17
US61/170,112 2009-04-17
KR10-2010-0034377 2010-04-14
KR1020100034377A KR20100114474A (ko) 2009-04-15 2010-04-14 자원할당정보 획득 방법

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070107614A (ko) * 2006-05-02 2007-11-07 한국전자통신연구원 직교 주파수 분할 다중 접속 시스템에서의 하향링크스케줄링 정보 송/수신 방법
KR20080048658A (ko) * 2006-11-29 2008-06-03 삼성전자주식회사 통신 시스템에서 집중 타입 자원 할당 정보 송수신 장치 및방법
KR20080085770A (ko) * 2007-03-19 2008-09-24 엘지전자 주식회사 이동 통신 시스템에서의 자원 할당 방법 및 자원 할당 정보송수신 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070107614A (ko) * 2006-05-02 2007-11-07 한국전자통신연구원 직교 주파수 분할 다중 접속 시스템에서의 하향링크스케줄링 정보 송/수신 방법
KR20080048658A (ko) * 2006-11-29 2008-06-03 삼성전자주식회사 통신 시스템에서 집중 타입 자원 할당 정보 송수신 장치 및방법
KR20080085770A (ko) * 2007-03-19 2008-09-24 엘지전자 주식회사 이동 통신 시스템에서의 자원 할당 방법 및 자원 할당 정보송수신 방법

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