WO2008082219A1 - Procédé d'émission de message de système de communication prenante en charge ofdm/ofdma - Google Patents

Procédé d'émission de message de système de communication prenante en charge ofdm/ofdma Download PDF

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Publication number
WO2008082219A1
WO2008082219A1 PCT/KR2007/006989 KR2007006989W WO2008082219A1 WO 2008082219 A1 WO2008082219 A1 WO 2008082219A1 KR 2007006989 W KR2007006989 W KR 2007006989W WO 2008082219 A1 WO2008082219 A1 WO 2008082219A1
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WIPO (PCT)
Prior art keywords
message
ranging
aas
amc
zone
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PCT/KR2007/006989
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English (en)
Inventor
Hyung-Joon Jeon
Jae-Hyeong Kim
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Posdata Co., Ltd.
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Publication of WO2008082219A1 publication Critical patent/WO2008082219A1/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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/564—Connection-oriented
    • H04L2012/5641—Unicast/point-to-point

Definitions

  • the present invention relates to a wireless communication system and, more particularly, to the message transmission method for a communication system supporting the OFDM/OFDMA (Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiplexing Access) which is capable of acknowledging the capability of each MS (Mobile Station) at the initial procedure of network entry by grouping ranging codes into code groups to include the information of each MS.
  • OFDM/OFDMA Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiplexing Access
  • the representative communication system is IEEE (Institute of Electrical and Electronics Engineers) 802.16d communication system and IEEE 802.16e communication system.
  • the IEEE 802.16d communication system and the IEEE 802.16e communication system are the communication system which applies the OFDM/OFDMA in order to support the broadband transmit network to the physical channel of a wireless MAN (Metro Area Network) system.
  • Figure 1 is a configuration diagram showing the procedure for the network entry in a wireless communication system.
  • the communication system which is considered at IEEE 802.16e is a system in which the mobility of the MS is considered.
  • the network entry process includes the step of scanning for DL (DownLink) channel for the channel synchronization (SlOl), the step of obtaining UL (UpLink) parameters (S 102), the step of ranging & automatic adjustments (S 103), the step of negotiating basic capabilities (S 104), the step of MS authorization and key transmission (S 105), the step of registering with BS (S 106), and the step of IP connectivity & operational parameters transmission ⁇ 107).
  • the scan for the DL channel is performed for the channel synchronization.
  • the process is include with the frame synchronization, the DL-MAP message showing the resource allocation information of the DL subframe for each frame and the reception of the DCD (DL Channel Descriptor) message including parameters relating with the DL channel.
  • DCD DL Channel Descriptor
  • UL-MAP message which indicates how to allocate the resources forming the UL subframe to MS and the UCD (UL Channel Decsriptor) message including parameters relating with the UL channel.
  • the ranging is classified into the initial ranging and the handover ranging, the bandwidth request ranging, and the periodic ranging based on the purpose.
  • Subscriber Station Basic Capability Request message and the SBC-RSP (Subscriber Station Basic Capability Response) message, and is regarded as the step of negotiating the support capability of the MS such as the permutation support, the MS demodulator.
  • SBC-RSP Subscriber Station Basic Capability Response
  • Figure 2 is a configuration diagram showing the message flow at the network entry process.
  • the message flow at the network entry process can be divided into at the broadcast management message transmission process (S201 ⁇ S203) in the PUSC (Partial Usage of Subchannels) zone, the unicast management message transmission process (S204 ⁇ S211) in the PUSC zone, and the unicast management message transmission process (S212 ⁇ S219) in the PUSC zone, FUSC (Full Usage of Subchannels) zone or in the AMC (Adaptive Modulation and Coding) zone.
  • Base Station e.g. RAS (Radio Access Station) includes the transmission of the SICH/DCD/UCD message (S201), the DL-MAP/UL-MAP message (S202), and the NBR-ADV (Neighbor Advertisement) message (S203) for acquiring the information on the neighboring.
  • S201 SICH/DCD/UCD message
  • S202 DL-MAP/UL-MAP message
  • NBR-ADV Neighbor Advertisement
  • the unicast management message transmission in the PUSC zone includes the transmission of the RNG-REQ and the RNG-RSP message (S204 ⁇ S207) for obtaining the exact timing offset and the power-adjustment, the CDMA Allocation IE message (S208) as a response for the CDMA code based on the initial ranging after the RNG-RSP message in which the status field becomes 'success', the RNG-REQ (MAC_Addr (Medium Access Control Address)) message (S209) and RNG-RSP (Primary_CID (Connection Identifier)) message (S210), the SBC-REQ message (S211) and SBC-RSP message (S212) for the capability negotiation between the RAS and the MS.
  • the CDMA Allocation IE message S208
  • the unicast management message transmission in the PUSC zone FUSC zone or AMC zone includes the transmission of the PKM-REQ (Privacy Key Management Request) message, the PKM-RSP (Privacy Key Management Response) message (S213 ⁇ S218) and the REG-REQ (Registration Request) (Mobility Feature) message (S219), and the REG-RSP (Registration Response)(2nd-CID) message (S220).
  • PKM-REQ Primary Key Management Request
  • PKM-RSP Primary Key Management Response
  • REG-REQ Registration Request
  • Mobility Feature Mobility Feature
  • the initial ranging at the network entry process is the ranging which is performed in order that the RAS performs synchronization with the MS, and regarded as the ranging which synchronizes the exact time and frequency offset between the MS and the RAS, and is performed in order to control the transmit power.
  • Figure 3 is a diagram showing the message flow at the periodic ranging process.
  • the transmission of the message related to all periodic ranging of Fig. 3 that is, the transmission of the RNG-REQ message (S301)(S303) and the RNG-RSP message (S302) (S304) are performed in the PUSC zone.
  • the periodic ranging indicates the ranging that the MS which controlled the time offset and the transmit power with the RAS through the initial ranging periodically performs with the RAS so as to control again the time offset and the transmit power according to the channel condition.
  • the periodic ranging is determined to operate and the periodic ranging is performed.
  • Figure 4 is a diagram showing the message flow at the bandwidth request ranging process.
  • the RAS can not know the capability of each MS before the reception of the BW-REQ (Bandwidth Request) Header message including the CID of MS, therefore the transmission of the bandwidth request ranging message, that is, the transmission of the RNG-REQ and RNG-RSP (S401 ⁇ S404), the CDMA Allocation IE (S405), and the BW-REQ Header message (S406) are performed in the PUSC zone.
  • the bandwidth request ranging message that is, the transmission of the RNG-REQ and RNG-RSP (S401 ⁇ S404), the CDMA Allocation IE (S405), and the BW-REQ Header message (S406) are performed in the PUSC zone.
  • the bandwidth request ranging is a ranging which is requested for the bandwidth allocation by the MS controlling the time offset and the transmit power with the RAS through the initial ranging so as to perform a real communication with RAS.
  • Figure 5 shows a table indicating the configuration of ranging code used for the ranging performing shown in Figure 2, Figure 3, Figure 4.
  • the configuration of whole field of the ranging code table provides Initial Ranging Codes 501, Periodic Ranging Codes 502, Bandwidth Request Ranging Codes 503, Start of Ranging Codes Group 504, and Handover Ranging Codes 505.
  • Figure 5 shows the example of the configuration of the ranging code defined in the
  • MCS Modulation and Coding Scheme
  • the frequency selective zone such as the Band AMC or AAS (Adaptive Antenna System) so as to enhance the performance of system in the future in the network entry process and each ranging execution process of the MS, the case of providing the PUSC zone which is periodically long may be generated because the MS is unable to know the basic ability in advance and only assigns messages in the broadcast PUSC zone to transmit.
  • the invention has been designed to solve the above-mentioned problems, and it is an object of the invention to provide the message transmission method in a wireless communication system which is capable of efficiently using the radio resource by knowing the capability of each MS at the network entry initial process.
  • Still another object of the present invention to provide the message transmission method for the communication system supporting the OFDM / OFDMA which is capable of efficiently using the radio resource and the AAS operation for the MS capable of supporting the AAS operation and Band AMC in the frequency selective zone.
  • a message transmission method for the communication system supporting the OFDM/OFDMA which comprises transmitting, by a BS (Base Station), an UCD (Uplink Channel Decsriptor) Message including a ranging code information indicating the support of basic capability of a MS (Mobile Station); and transmitting, by the BS, an UL (UpLink)/DL (Downlink) message in a PUSC (Partial Usage of Subchannels) zone, or a FUSC (Full Usage of Subchannels) zone, or a Band AMC (Adaptive Modulation and Coding) zone according to the ranging code information.
  • a BS Base Station
  • UCD Uplink Channel Decsriptor
  • UL (UpLink)/DL (Downlink) message in a PUSC (Partial Usage of Subchannels) zone, or a FUSC (Full Usage of Subchannels) zone, or
  • a message transmission method for the communication system supporting the OFDM/OFDMA mode which comprises transmitting a ranging request message including an initial ranging CID (Connection Identifier) indicating a basic capability of the MS with a specific value after a success of initial ranging; and receiving an UL (UpLink)/DL (DownLink) message through one of PUSC (Partial Usage of Subchannels) zone, FUSC (Full Usage of Subchannels) and BAND AMC (Adaptive Modulation and Coding) zone according to the ranging request message.
  • PUSC Partial Usage of Subchannels
  • FUSC Frull Usage of Subchannels
  • BAND AMC Adaptive Modulation and Coding
  • a message transmission method for the communication system supporting the OFDM/OFDMA mode which comprises receiving an UCD (Uplink Channel Decsriptor) Message including a ranging code information indicating a basic capability of an MS (Mobile Station) from a BS (Base Station); and performing a ranging by using the ranging code in- formation(Adaptive Antenna System) mode and an AMC (Adaptive Modulation and Coding).
  • UCD Uplink Channel Decsriptor
  • MS Mobile Station
  • BS Base Station
  • AMC Adaptive Modulation and Coding
  • OFDM / OFDMA has an effect as follows. [37] It is possible that the scheduling and the radio resource are efficiently utilized by knowing the capability of each MS at the network entry initial process. [38] Further, it is possible that the scheduling and the radio resource are efficiently utilized by permitting the RAS to recognize the capability of each MS at the ranging performance step of a MS. [39] The present invention has the effect that the radio resource for a MS which is available for supporting the AAS mode or the band AMC in the frequency selective zone is efficiently used. [40] Further, the beam forming can be rapidly performed in RAS which supports the
  • Figure 1 is a configuration diagram showing the procedure for the network entry in a wireless communication system.
  • Figure 2 is a configuration diagram showing the flow of a message at the network entry process.
  • Figure 3 is a configuration diagram showing the message flow at the periodic ranging process.
  • Figure 4 is a configuration diagram showing the message flow at the bandwidth request ranging process.
  • Figure 5 is a table showing the configuration of the ranging code used for each ranging performance shown in Fig. 2, 3, 4.
  • Figure 6 is a table showing the configuration of the ranging code in a wireless communication system according to the present invention.
  • Figure 7 is a configuration diagram showing the flow of a message at the network entry process in a wireless communication system according to the present invention.
  • Figure 8 is a configuration diagram showing the message flow at the periodic ranging process in a wireless communication system according to the present invention.
  • Figure 9 is a configuration diagram showing the message flow at the bandwidth ranging process in a wireless communication system according to the present invention.
  • Figure 10 is a table showing the AAS initial ranging CID structure according to the present invention.
  • FIG. 11 is a configuration diagram of message flow applying the AAS initial ranging CID at the network entry process according to the present invention.
  • Figure 6 is a table showing the configuration of the ranging code in a wireless communication system according to the present invention.
  • the configuration of the ranging code according to the present invention is transmitted to the MS by the UCD (UL (UpLink) Channel Decsriptor) message and each ranging code is grouped into groups, providing a code for the MS (Mobile Stati on) which supports the AAS (Adaptive Antenna System) mode and the Band AMC and the code for the MS which does not support the AAS mode and the Band AMC (Adaptive Modulation and Coding).
  • UCD UL (UpLink) Channel Decsriptor
  • each ranging code is grouped into groups, providing a code for the MS (Mobile Stati on) which supports the AAS (Adaptive Antenna System) mode and the Band AMC and the code for the MS which does not support the AAS mode and the Band AMC (Adaptive Modulation and Coding).
  • the whole field configuration of the ranging code table includes Initial
  • Ranging Codes 611 Initial Ranging Codes for MS supporting AAS and AMC 601 for the MS supporting the AAS mode and AMC, Periodic Ranging Codes 612, Periodic Ranging Codes for MS supporting AAS and AMC 602 for the MS supporting the AAS mode and AMC, Bandwidth Request Ranging Codes 613, Bandwidth Request Ranging Codes for MS supporting AAS and AMC 603 for the MS supporting the AAS mode and AMC, Start of Ranging Codes Group 615 which is code for the beginning of the ranging code group, Handover Ranging Codes 614, and Handover Ranging Codes for MS supporting AAS and AMC 604 for the MS supporting the AAS mode and AMC.
  • the ranging code of each field indicates the code number, and the available value ranges from 0 to 255, while each Tag is differently designated.
  • the Initial Ranging Codes is a ranging code for synchronizing the time and the exact frequency offset between the MS and the BS (Base Station), e.g. the RAS (radio access station) and controlling the transmit power, and dose not indicate the MS basic capability information.
  • the Initial Ranging Codes for MS supporting AAS and AMC for the MS supporting the AAS mode and AMC is a ranging code for synchronizing the time and the exact frequency offset between the MS and the RAS and controlling the transmit power, and indicates the MS basic capability information.
  • the Periodic Ranging Codes 612 is a ranging code, which is periodically performed with the RAS for controlling again the time offset and the transmit power according to the channel condition, does not include the MS information.
  • the Periodic Ranging Codes for MS supporting AAS and AMC 602 for the MS supporting the AAS mode and AMC is a ranging code, which is periodically performed with the RAS for controlling again the time offset and the transmit power according to the channel condition, does not include the MS information.
  • the Bandwidth Request Ranging Codes 613 is a ranging, which is requested for the bandwidth allocation by the MS so as to perform a real communication with RAS, does not include the MS information.
  • MS supporting the AAS mode and AMC Codes is a ranging code, which is requested for the bandwidth allocation by the MS so as to perform a real communication with RAS, includes the MS information.
  • the Handover Ranging Codes 614 does not include the MS information
  • the Handover Ranging Codes for MS supporting AAS and AMC 604 for the MS includes the MS information.
  • the signal gain through the beam forming of an antenna can be obtained in case of supporting the AAS.
  • the RAS knows the capability of the MS at the initial process of network entry and, after that, the massage switching is performed at the PUSC (Partial Usage of Subchannels), FUSC (Full Usage of Subchannels) or AMC zone so that the beam forming gain characteristic can be improved at the AAS mode.
  • PUSC Partial Usage of Subchannels
  • FUSC Full Usage of Subchannels
  • AMC zone so that the beam forming gain characteristic can be improved at the AAS mode.
  • Figure 7 is a configuration diagram showing the flow of a message at the network entry process in a wireless communication system according to the present invention.
  • Figure 8 is a configuration diagram showing the message flow in the periodic ranging process in a wireless communication system according to the present invention.
  • Figure 9 is a configuration diagram showing the message flow in the bandwidth ranging process in a wireless communication system according to the present invention.
  • the broadcast management message transmission in the PUSC zone includes the transmission of the SICH/DCD (DL (Downlink) Channel Descriptor)/ UCD message (S701), the DL-MAP/UL-MAP message (S702), and the NBR- ADV(Neighbor Advertisement) message (S703) for acquiring the information of the neighboring RAS.
  • SICH/DCD DL (Downlink) Channel Descriptor
  • UCD DL-MAP/UL-MAP message
  • S703 NBR- ADV(Neighbor Advertisement) message
  • the unicast management message transmission in the PUSC, FUSC or AMC zone includes the transmission of the RNG-REQ (Ranging Request) massage and the RNG- RSP (Ranging Response) message (S704 ⁇ S707) for obtaining the exact timing offset, and the power-adjustment, thereafter, the massage transmission is performed in the PUSC, FUSC or AMC zone since the RNG-REQ message includes the MS information.
  • the RAS can know that the MS supports the AAS mode and Band AMC by the Initial Ranging Codes for MS supporting AAS and AMC. Hence, the massage transmission is performed in the FUSC or AMC zone, not in the PUSC zone.
  • the message transmission includes the transmission of the CDMA (Code Division Multiplexing Access) Allocation IE (Information Element) message (S708) as a response for the CDMA code based on the initial ranging after the RNG-RSP message in which the status field becomes 'success' the RNG-REQ (MAC_Addr (Medium Access Control Address)) message (S709) and RNG-RSP (Primary_CID (Connection Identifier)) (S710), the SBC-REQ (Subscriber Station Basic Capability Request) message (S711) and the SBC-RSP (Subscriber Station Basic Capability Response) message (S712) for the capability negotiation between the RAS and the MS, the PKM-REQ (Privacy Key Management Request) message, the PKM-RSP (Privacy Key Management Response) message (S713 ⁇ S718), the REG-REQ (Registration Request) (Mobility Feature) message (S719), and the REG-RS
  • CDMA Code
  • the transmission of the broadcast management message in the PUSC zone includes the transmission of the SICH/DCD/UCD message, the DL-MAP/UL-MAP message, and the NBR-ADV message for acquiring the information of the neighboring RAS.
  • the MS transmits the initial ranging code to the RAS by the Initial RNG-REQ (code) message with the contention scheme. Such code ranging performs the UL timing and power offset adjustment of the MS.
  • the RAS determines the capability of the MS by the Initial Ranging Codes for MS supporting AAS and AMC including the MS information, thereafter, the massage transmission is performed by the unicast in the PUSC, FUSC or AMC zone.
  • the RAS includes the code ranging information and the power offset adjustment in the Initial RNG-RSP message transmitted by the MS, and unicasts the Initial RNG- RSP message.
  • the MS receiving the Initial RNG-RSP message confirms the code ranging information and controls the power offset. And the MS retries the code ranging when the status field of the RNG-RSP message is 'continue'.
  • the RAS determines that the timing and the power control were performed through the code ranging attempted by the MS, the RAS includes success in the status field of the Initial RNG-RSP message, and transmits the Initial RNG-RSP message.
  • the RAS allocates the UL bandwidth to the MS for transmitting the RNG-REQ message through the UL-MAP having the CDMA Allocation IE and applies.
  • the CDMA Allocation IE includes the amount of UL resource allocated to the MS and the code ranging information transmitted by the MS. Then, in case the status field of the RNG-RSP message is 'success', the MS finishes the code ranging and attempts the message ranging.
  • the basic CID such as Basic CID and Primary CID is allocated to the MS the through the ranging procedure.
  • Such CID is a value that is uniquely allocated to the MS by a corresponding RAS, and the CID becomes the information classifying the MS during the RAS access.
  • the information delivered through the RNG-REQ message comprises several information including the MAC address information of the MS, the RAS responses with RNG-RSP message according to the information.
  • the MS transmits the capability request message SBC-REQ message through the Basic CID and the Primary CID included in RNG-RSP message.
  • the network entry procedure includes the MS approval and the key transmission (MS Authorization and Key Transmission) process according to standard of using the PKM-REQ message and the PKM-RSP message, the Register with BS process, and the IP Connectivity & Operational Parameters process.
  • FIG. 8 shows the message flow at the periodic ranging process.
  • the RAS determines the MS transmitting the Periodic RNG-REQ (code) message and supporting the AAS mode and AMC, by the Periodic Ranging Codes for MS supporting AAS and AMC, so that the transmission of the message (S801 ⁇ S804) related to all periodic ranging is performed in the PUSC, FUSC or AMC zone.
  • Figure 9 shows the message flow at the bandwidth ranging process.
  • the RAS determines the MS transmitting RNG-REQ (code) message for the
  • Bandwidth Request supporting the AAS mode and AMC by the Bandwidth Request Ranging Codes for MS supporting AAS and AMC) for the MS supporting the AAS mode and AMC, so that the bandwidth allocation after receiving the BW-REQ Header message and the data transmission (S905 ⁇ S908) are performed in PUSC, FUSC or AMC zone.
  • Figure 10 is a table showing the AAS initial ranging CID structure according to the present invention
  • Figure 11 is a configuration diagram of message flow applying the AAS initial ranging CID at the network entry process according to the present invention.
  • RAS is able to recognize the capability of the MS by using the AAS initial ranging, thereby, the massage transmission is performed in the PUSC, FUSC, or the AMC zone.
  • the network entry procedure of the MS using the AAS initial ranging CID is as follows. [94] Firstly, the transmission of the SICH/DCD/UCD message (S 1101), the DL-
  • MAP/UL-MAP message (Sl 102)
  • NBR-ADV message (Sl 103) for acquiring the information of the neighboring RAS is performed by the transmission of the broadcast management message in the PUSC zone.
  • the unicast management message transmission is performed in the PUSC zone before the RAS receives the RNG-REQ (MAC_Addr) message including CID having the MS information.
  • the unicast management message transmission includes the transmission of the RNG-REQ message and the RNG-RSP message for obtaining the exact timing offset and the power-adjustment, the CDMA Allocation IE message (Sl 104 ⁇ Sl 108) as a response for the CDMA code based on the initial ranging after the RNG-RSP message in which the status field becomes 'success'.
  • the RAS determines a corresponding MS supporting the AAS mode, thereby, the transmission of the unicast Management Message (Sl 109 ⁇ Sl 120) is performed in the PUSC, FUSC, or AMC zone.
  • the present invention groups the ranging codes into the code groups and includes the information of each MS, or performs the RAS to recognize whether a corresponding MS supports AAS by using the AAS initial ranging CID, so that the transmission of the unicast management message in the PUSC, FUSC, or AMC zone according to the capability of each MS is performed after the reception of a corresponding message.
  • the RAS which supports AAS is rapidly capable of the beam forming than before since the RAS is able to know the support capability of the MS in advance. Since the message having a large size such as the SBC-REQ message can be transmitted with AAS through the Band AMC zone, the transmission is possible without the degradation of the power density.

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

Abstract

L'invention concerne un procédé d'émission de message pour un système de communication prenant en charge OFDM/OFDMA qui est capable d'utiliser efficacement la ressource radio et le fonctionnement AAS pour la station mobile capable de prendre en charge le fonctionnement AAS dans la zone de bande AMC dans la zone sélective de fréquence, en permettant au RAS de connaître la capacité de chaque station mobile à l'étape d'exécution de portée. La présente invention regroupe les codes de portée en groupes de codes et comprend les informations de chaque station mobile, ou elle effectue le RAS pour savoir si une station mobile correspondante prend en charge AAS par l'utilisation du CID de portée initiale AAS, de sorte que l'émission du message de gestion unidiffusion soit effectuée dans la zone PUSC, FUSC ou AMC en fonction de la capacité de chaque station mobile après la réception d'un message correspondant.
PCT/KR2007/006989 2006-12-30 2007-12-28 Procédé d'émission de message de système de communication prenante en charge ofdm/ofdma WO2008082219A1 (fr)

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