WO2008136569A1 - Procédé de signalisation de map dans un système ofdma - Google Patents

Procédé de signalisation de map dans un système ofdma Download PDF

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Publication number
WO2008136569A1
WO2008136569A1 PCT/KR2008/000163 KR2008000163W WO2008136569A1 WO 2008136569 A1 WO2008136569 A1 WO 2008136569A1 KR 2008000163 W KR2008000163 W KR 2008000163W WO 2008136569 A1 WO2008136569 A1 WO 2008136569A1
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WO
WIPO (PCT)
Prior art keywords
map
heading
signaling method
maps
sub
Prior art date
Application number
PCT/KR2008/000163
Other languages
English (en)
Inventor
Kwang-Jae Lim
Chul-Sik Yoon
Original Assignee
Electronics And Telecommunications Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Publication of WO2008136569A1 publication Critical patent/WO2008136569A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a mobile application part (MAP) signaling method in an orthogonal frequency division multiple access (OFDMA) system. More particularly, the present invention relates to a MAP signaling method for allocating radio resources to a mobile terminal and controlling a wireless link in an OFDMA system.
  • MAP mobile application part
  • OFDMA orthogonal frequency division multiple access
  • OFDMA orthogonality between subcarriers
  • IFFT inverse fast Fourier transform
  • a receiving apparatus in the OFDMA system eliminates the CP from the signal received through a receiving antenna, performs subcarrier demapping for signals obtained by performing a fast Fourier transform (FFT), performs detecting and decoding, and estimates a user signal.
  • FFT fast Fourier transform
  • a MAP that is downlink transmitted for each frame is used to inform radio resources allocated to a mobile terminal or to transmit control information for wireless link control.
  • FIG. 1 is a diagram representing an example of a downlink frame including a MAP in the OFDMA system.
  • the arrow on the vertical axis indicates an OFDMA symbol number
  • the arrow on the horizontal axis indicates a subchannel logical number.
  • a first symbol in a downlink frame is used to transmit a preamble, and radio resources are formed by using slots.
  • the FCH informs a transmission method of a MAP transmitted after the FCH and a slot length of the MAP.
  • the MAP allocates the radio resources in downlink and uplink frames, or the MAP includes information elements (IE) for wireless control.
  • IE information elements
  • each slot includes 48 data subcarriers, and MAP data bits are modulated and coded to the data subcarrier to be transmitted.
  • FIG. 2 is a diagram representing subsequent slots used to transmit the FCH and the MAP.
  • an arrow of a horizontal axis indicates a logical slot number.
  • a transmission method and a length of the MAP are expressed as a logical slot in the FCH.
  • the MAP is transmitted in a strong modulation and coding scheme so as to be received outside of the cell, and the MAP is usually 1/2 coded, quadrature phase shift keying (QPSK) modulated, and repeatedly transmitted six times.
  • QPSK quadrature phase shift keying
  • FIG. 3 is a diagram representing an example of a downlink frame when a sub-MAP is used
  • FIG. 4 is a diagram representing a FCH, a main MAP, and sub-MAPs in subsequent slots.
  • a sub-MAP pointer information element (IE) for informing transmission methods and MAP lengths of respective sub-MAPs is transmitted in the main MAP after the FCH, and the respective sub-MAPs defined by the sub-MAP pointer IE include control information for users.
  • each slot may transmit data of 96 bits.
  • MAP data to be transmitted in the last slot are 12 bits, the remaining 84 bits are not used, and radio resources may be wasted.
  • MAP MAP signaling method for allocating radio resources to a mobile terminal and controlling a wireless link in an orthogonal frequency division multiple access (OFDMA) system.
  • OFDMA orthogonal frequency division multiple access
  • the present invention has been made in an effort to provide a MAP signaling method for transmitting a MAP with less overhead, reducing the amount of radio resources used to transmit the MAP, and using the reduced number of receiving processes to receive MAP information in an OFDMA mobile communication system.
  • a MAP heading for one or at least one MAP is generated, the MAP heading is transmitted, and the respective MAPs are transmitted by the MAP heading.
  • predetermined padding bits fill the part.
  • the MAP heading includes MAP transmission methods and MAP lengths of the respective MAPs.
  • the respective MAP transmission methods are previously defined in the OFDMA system or determined by broadcasting information, and the respective MAP lengths are formed by using sub-slots that are smaller than reference slots used to transmit data.
  • the MAP heading includes a number of MAPs transmitted in a current frame, numbers for the transmission method used to transmit the MAP, and a number of sub-slots used to transmit the MAPs.
  • a size of all the MAPs is an integer number of times the sub-slot.
  • the respective MAPs are transmitted by the MAP transmission method designated by the MAP heading in the sub-slots designated by the MAP heading, and the respective MAPs are transmitted by different transmission methods and different transmission powers.
  • a MAP heading is received from the OFDMA system, information on transmission methods of the respective MAPs and MAP lengths of the respective MAPs are obtained from previously defined numbers in the MAP heading, and control information is obtained from the respective MAPs designated by the MAP heading.
  • the amount of radio resources used for the MAP transmission may be reduced, and the MAP information may be received by performing reduced receiving steps.
  • FIG. 1 is a diagram representing an example of a downlink frame including a mobile application part (MAP) in a conventional orthogonal frequency division multiple access (OFDMA) system.
  • MAP mobile application part
  • OFDMA orthogonal frequency division multiple access
  • FIG. 2 is a diagram representing subsequent slots used to transmit a MAP in the conventional OFDMA system.
  • FIG. 3 is a diagram representing an example of a downlink frame when a sub-MAP is used in the conventional OFDMA system.
  • FIG. 4 is a diagram representing subsequent slots used to transmit a sub-MAP in the conventional OFDMA system.
  • FIG. 5 is a flowchart representing a MAP signaling method in an OFDMA system according to an exemplary embodiment of the present invention.
  • FIG. 6 is a diagram representing an example of a downlink frame including a MAP transmission method in the OFDMA system according to the exemplary embodiment of the present invention.
  • FIG. 7 is a diagram representing a MAP heading to subsequent sub-slots and MAP transmission in the OFDMA system according to the exemplary embodiment of the present invention.
  • FIG. 8 is a diagram representing a detailed configuration of a MAP heading in the
  • FIG. 9 is a diagram representing lengths of the respective MAPs by using sub-slots in the MAP heading of the OFDMA system according to the exemplary embodiment of the present invention.
  • MAP mobile application part
  • OFDMA orthogonal frequency division multiple access
  • FIG. 5 is a flowchart representing the MAP signaling method in the OFDMA system according to the exemplary embodiment of the present invention
  • FIG. 6 is a diagram representing an example of a downlink frame including a MAP transmission method in the OFDMA system according to the exemplary embodiment of the present invention
  • FIG. 7 is a diagram representing a MAP heading to subsequent sub-slots and MAP transmission in the OFDMA system according to the exemplary embodiment of the present invention
  • FIG. 8 is a diagram representing a detailed configuration of the MAP heading in the OFDMA system according to the exemplary embodiment of the present invention
  • FIG. 9 is a diagram representing lengths of the respective MAPs by using sub-slots in the MAP heading of the OFDMA system according to the exemplary embodiment of the present invention.
  • MAP Heading information including a transmission method for one or more MAPs and subslot lengths of the respective MAPs is generated in step S501.
  • the MAP transmission method is previously stored in the OFDMA system, or it is determined by broadcasting information.
  • the MAP Heading includes a MAP number N MAP , a MAP transmission method number, a MAP sub-slot length, and a reserved field.
  • the MAP transmission method number is expressed as B bits, and indicates numbers allocated to the transmission methods used for MAP transmission.
  • the transmission methods for the respective numbers are previously defined in the OFDMA system.
  • the MAP sub-slot length is expressed as C bits, and indicates the number of sub- slots used to transmit the respective MAPs. For example, when the MAP Heading is formed with 24 bits, the number of bits used in the MAP sub-slot length and the number of bits used for the reserved field are defined as shown in Table 3.
  • Lengths of the respective MAPs are expressed with sub-slots that are smaller than a reference slot used for usual data transmission. For example, when the reference slot for the data transmission includes 48 data subcarriers, the sub-slot used to transmit the MAP includes 8 data subcarriers.
  • one slot includes 6 sub-slots.
  • the number of subcarriers that are not actually used in the last sub-slot among the sub-slots used for the MAP may be reduced.
  • the MAP Heading is transmitted by using two slots, and the transmission methods (MAP TF 0, MAP TF 1, MAP TF 3) of the respective MAPs and a sub-slot length of the MPA are informed by the MAP Heading.
  • the MAP Heading generated in step S501 is transmitted from a first slot after a preamble in a like manner of the OFDMA system in step S502. That is, the MAP Heading informing the transmission methods and the sub-slot lengths of the respective MAPs is transmitted from the first slot of a downlink frame.
  • the MAP is transmitted by different transmission methods and different transmission powers in step S503. That is, the respective MAPs designated by the MAP Heading generated in step S501 may be transmitted by different transmission methods and different transmission powers.
  • step S503 in the sub-slots designated by the MAP Heading generated in step S501, the respective MAPs are transmitted by the MAP transmission method designated by the MAP Heading.
  • the lengths of the respective MAPs designated by the MAP Heading are previously established by the sub-slots that are smaller than the reference slot used for data burst signaling. That is, the sub-slot designated by the MAP Heading generated in step S501 is previously established by the sub-carrier that is an integer number of times smaller than the reference slot for the data burst signaling.
  • the MAP Heading is firstly received from the OFDMA system to obtain information on the transmission methods and MAP lengths of the respective MAPs, and control information is obtained from the respective MAPs designated by the received MAP Heading.
  • the MAP signaling method for receiving the MAP information by a mobile terminal from the OFDMA system includes a step for obtaining the information on the transmission methods and the MAP lengths of the respective MAPs, and a step for obtaining the control information from the respective MAPs.
  • various MAP transmission methods may be performed when one MAP is transmitted, or when a plurality of MAPs are transmitted by the same transmission method or different transmission powers.
  • the MAP Heading informing the transmission methods and the sub-slot lengths of the respective MAPs are transmitted from the first slot of the downlink frame, and the respective MAPs are transmitted by the MAP transmission method designated by the MAP Heading in the sub-slots designated by the MAP Heading.
  • the mobile terminal receives the MAP information from the OFDMA system to obtain the transmission methods and the MAP lengths of the respective MAPs, and obtains the control information from the respective MAPs.
  • the exemplary embodiment of the present invention that has been described above may be implemented by not only an apparatus and a method but also a program capable of realizing a function corresponding to the structure according to the exemplary embodiment of the present invention and a recording medium having the program recorded therein. It can be understood by those skilled in the art that the implementation can be easily made from the above-described exemplary embodiment of the present invention.

Abstract

L'invention concerne un procédé de signalisation de pièce pour service mobile (MAP) pour transmettre une MAP provenant d'un système à un accès multiple par répartition orthogonale de la fréquence (OFDMA) à un terminal utilisateur. Dans le procédé de signalisation de MAP, un en-tête de MAP destiné à au moins une MAP est généré, puis transmis, les MAP respectives étant transmises par l'en-tête MAP. De ce fait, la quantité de ressources radio utilisées pour transmettre la MAP peut être réduite, les informations MAP pouvant être reçues au moyen d'un nombre réduit de processus de réception.
PCT/KR2008/000163 2007-05-08 2008-01-10 Procédé de signalisation de map dans un système ofdma WO2008136569A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0044416 2007-05-08
KR1020070044416 2007-05-08

Publications (1)

Publication Number Publication Date
WO2008136569A1 true WO2008136569A1 (fr) 2008-11-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060004870A (ko) * 2004-07-10 2006-01-16 삼성전자주식회사 Ｏｆｄｍａ 시스템을 위한 동적자원할당방법
US20060088008A1 (en) * 2004-10-26 2006-04-27 Samsung Electronics Co., Ltd. Method and device for controlling power in mobile terminal
KR20060037101A (ko) * 2004-10-27 2006-05-03 삼성전자주식회사 광대역 무선 통신시스템에서 하향링크/상향링크 맵메시지를 생성하기 위한 장치 및 방법
KR20060042797A (ko) * 2004-11-10 2006-05-15 삼성전자주식회사 광대역 무선 접속 시스템에서 멀티 프레임을 이용한 채널할당 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060004870A (ko) * 2004-07-10 2006-01-16 삼성전자주식회사 Ｏｆｄｍａ 시스템을 위한 동적자원할당방법
US20060088008A1 (en) * 2004-10-26 2006-04-27 Samsung Electronics Co., Ltd. Method and device for controlling power in mobile terminal
KR20060037101A (ko) * 2004-10-27 2006-05-03 삼성전자주식회사 광대역 무선 통신시스템에서 하향링크/상향링크 맵메시지를 생성하기 위한 장치 및 방법
KR20060042797A (ko) * 2004-11-10 2006-05-15 삼성전자주식회사 광대역 무선 접속 시스템에서 멀티 프레임을 이용한 채널할당 방법

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