WO2008041495A1 - Système de communication mobile, procédé de communication sans fil, dispositifs de station de base et de station mobile - Google Patents

Système de communication mobile, procédé de communication sans fil, dispositifs de station de base et de station mobile Download PDF

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Publication number
WO2008041495A1
WO2008041495A1 PCT/JP2007/068290 JP2007068290W WO2008041495A1 WO 2008041495 A1 WO2008041495 A1 WO 2008041495A1 JP 2007068290 W JP2007068290 W JP 2007068290W WO 2008041495 A1 WO2008041495 A1 WO 2008041495A1
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WO
WIPO (PCT)
Prior art keywords
station apparatus
mobile station
control information
base station
information
Prior art date
Application number
PCT/JP2007/068290
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English (en)
Japanese (ja)
Inventor
Toru Sahara
Original Assignee
Kyocera Corporation
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.)
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Publication date
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Publication of WO2008041495A1 publication Critical patent/WO2008041495A1/fr

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Classifications

    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • 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
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference
    • 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
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation

Definitions

  • Mobile communication system radio communication method, base station apparatus, and mobile station apparatus
  • the present invention relates to a technique for preventing communication interference in a mobile communication system.
  • a base station device and one or a plurality of mobile station devices perform wireless communication.
  • Each mobile station apparatus is assigned a communication channel used for communication with the base station apparatus. Which communication channel is assigned to which mobile station apparatus is determined by the base station apparatus.
  • Each mobile station apparatus is notified of communication channel information (allocation channel information) determined to be allocated by the base station apparatus. Each mobile station apparatus sets a communication channel based on the notified allocation channel information and communicates with the base station apparatus (see, for example, Patent Document 1).
  • Patent Document 1 JP-A-10-190621
  • the allocation channel information may be acquired with an error even if the modulation efficiency is lowered. there were. If the acquired allocation channel information includes an error, the mobile station apparatus transmits a signal to the base station apparatus using an incorrect communication channel, and as a result, the transmitted signal is transmitted to surrounding base station apparatuses and There were cases where it interfered with communication of mobile station equipment.
  • the present invention has been made in view of the above-described problems, and its purpose is to use the allocated channel information received by the mobile station apparatus including an error so that the surrounding base station apparatuses and It is an object of the present invention to provide a mobile communication system, a radio communication method, a base station apparatus, and a mobile station apparatus that prevent interference with communication of the mobile station apparatus.
  • a mobile communication system includes a base station apparatus and a mobile station apparatus that performs communication by being assigned at least a part of a plurality of communication channels by the base station apparatus. And the base station apparatus adds control information including allocation channel information specifying communication channel information allocated to the mobile station apparatus, and transmits the control information by adding an error detection code.
  • the mobile station apparatus includes a receiving unit that receives the control information transmitted by the control information transmitting unit, and an error detection code added to the control information received by the receiving unit.
  • An error detecting means for detecting an error in the assigned channel information, and a communication designated by the assigned channel information when an error is detected by the error detecting means.
  • the radio communication method according to the present invention is performed by a base station apparatus and a mobile station apparatus that performs communication by assigning at least a part of a plurality of communication channels by the base station apparatus.
  • a wireless communication method wherein the base station apparatus transmits a control information including allocation channel information specifying communication channel information allocated to the mobile station apparatus by adding an error detection code to the control information.
  • the mobile station apparatus receives the control information transmitted in the control information transmission step, and the mobile station apparatus based on the error detection code added to the control information received in the reception step, An error detection step for detecting an error in the allocation channel information; and when the mobile station apparatus detects an error in the error detection step, And a transmission control step for controlling not to transmit a signal using a communication channel specified by channel information.
  • the base station apparatus includes control information transmitting means for adding an error detection code to control information including allocation channel information specifying communication channel information allocated to the mobile station apparatus, and transmitting the control information. It is characterized by that.
  • the mobile station apparatus is a mobile station apparatus that performs communication by allocating at least a part of a plurality of communication channels by the base station apparatus, wherein the base station apparatus A receiving means for receiving control information including assigned channel information in which information on a communication channel assigned to the mobile station apparatus, to which an error detection code is added, is added to the control information received by the receiving means.
  • An error detection means for detecting an error in the allocation channel information based on the error detection code, and when an error is detected by the error detection means, a communication channel specified by the allocation channel information is used. Transmission control means for controlling so as not to transmit a signal.
  • the base station apparatus determines at least a part of communication channels to be allocated to the mobile station apparatus among a plurality of communication channels. Then, the base station apparatus adds the error detection code to the control information including the assigned channel information specifying the determined communication channel information, and transmits the control information. The mobile station apparatus receives the transmitted control information. Then, the mobile station apparatus performs error detection based on the error detection code included in the received control information. When an error is detected by error detection, the mobile station apparatus does not transmit a signal through the communication channel specified by the received allocation channel information.
  • the mobile station apparatus when an error is detected in the allocation channel information received from the base station apparatus, the mobile station apparatus does not perform communication using the communication channel specified by the allocation channel information. Therefore, it is possible to prevent the mobile station apparatus from interfering with the communication of surrounding base station apparatuses and mobile station apparatuses by transmitting signals using the allocation channel information received with errors.
  • the base station apparatus includes an encoding unit that encodes the control information using shared information shared by the base station apparatus and the mobile station apparatus.
  • the control information transmitting unit transmits the control information encoded by the encoding unit, and the mobile station apparatus shares the encoded control information received by the receiving unit with the shared information.
  • It further comprises decoding means for decoding using information.
  • allocation channel information transmitted from other base stations that do not have shared information and allocation channel information transmitted to other mobile station devices are not decoded, and erroneous allocation channels are transmitted. A signal can be prevented from being transmitted according to the information.
  • the encoding is scramble encoding using the shared information. In this way, the encoding and decoding circuits can be simplified, and the processing required for them can be reduced.
  • the shared information is unique information of at least one of the base station apparatus and the mobile station apparatus. In this way, it is possible to reliably identify the communication partner and prevent transmission of signals according to incorrect allocation channel information.
  • FIG. 1 is a diagram showing an example of a system configuration of a mobile communication system.
  • FIG. 2 is a diagram showing an example of a configuration of a communication frame.
  • FIG. 3 is a diagram showing an example of control information transmitted in ASCH.
  • FIG. 6 is a flow diagram of fixed modulation data generation processing.
  • FIG. 7 is an example of a shift register that generates a scramble sequence.
  • FIG. 8 shows an example of an error correction coding circuit.
  • FIG. 9 is a flowchart of received signal demodulation processing in the mobile station apparatus.
  • FIG. 1 shows an example of a system configuration of a mobile communication system according to the present embodiment.
  • a plurality of cells are arranged in the communication area. Each cell is provided with a base station apparatus 10 (10A, 10B, 10C).
  • the mobile station apparatus 100 (100A, 100B, 100C) performs radio communication with the base station apparatus 10 in a good communication state according to the location located in the communication area.
  • the mobile station devices 100A and 100B are the base station device 10A and the mobile station device 100C is the base station device 10C.
  • the mobile station apparatus 100 includes the TDD method. Data is transmitted and received with the base station apparatus 10 according to the equation, and multiplex communication is performed with the TDMA method and the OFDMA method.
  • Figure 2 shows the TDMA / TDD time slot structure (for 1 TDMA frame) and O
  • the uplink (signal from mobile station apparatus 100 to base station apparatus 10) and the downlink (signal from base station apparatus 10 to mobile station apparatus 100) both have four time slots. Consists of Each slot is composed of a plurality of subchannels. In the frame configuration shown in Figure 2
  • ESCH indicates an extended subchannel
  • ASCH indicates a subchannel assigned as an anchor subchannel
  • ESCH is a communication channel mainly used for transmission / reception of communication data with mobile station apparatus 100.
  • One or more ESCHs are assigned to the mobile station device 100 as communication channels.
  • ASCH is one subchannel identified from a plurality of subchannels, and is a subchannel used mainly for transmitting and receiving control information related to communication between mobile station apparatus 100 and base station apparatus 10. Is a channel.
  • FIG. 3 shows an example of control information transmitted by ASCH.
  • the control information includes MAP, ACK, MI, CRC, and TAIL data.
  • MAP is a mobile station device 1 among a plurality of subchannels that can be used by the base station device 10.
  • the ACK is information for transmitting in the mobile station device 100 or the base station device 10 that data transmitted from the data transmission side has been successfully received on the data reception side.
  • Ml is identifier information that designates a modulation scheme for the adaptive modulation region.
  • the adaptive modulation area is a data area in which communication data is mainly carried.
  • For the control information a fixed modulation method with reduced modulation efficiency is used to suppress the occurrence of errors during decoding.
  • CRC is information that stores the value of a CRC (Cyclic Redundancy Check) code for detecting data errors.
  • CRC code is generated for the CRC calculation area including MAP, ACK, and MI. The The same CRC code is generated from the same data.
  • TAIL is a bit added to initialize the value of the shift register constituting the encoding circuit to zero.
  • the scramble area in FIG. 3 is a data area obtained by adding CRC to the CRC calculation area, and this data area is scrambled. Details of the scramble coding will be described later.
  • ASCH is assigned when mobile station apparatus 100 requests base station apparatus 10 to establish a link. Then, control information including allocated channel information (MAP information) indicating a communication channel (ESCH) allocated to communication with the base station apparatus 10 is notified by the ASCH.
  • MAP information allocated channel information
  • ESCH communication channel
  • error detection is performed based on an error detection code (CRC code) included in received control information.
  • CRC code error detection code
  • the uplink signal is not transmitted using the subchannel specified by the received MAP information.
  • the control information to be transmitted is subjected to scramble coding so that the scramble area obtained by adding the CRC code to the CRC calculation area is normally decoded only by the intended mobile station apparatus 100, and the mobile station apparatus 100 (For example, 100A) receives control information transmitted from another base station apparatus 10 (for example, 10B, 10C) or control information transmitted to another mobile station apparatus 100 (for example, 100B, 100C). Do not set MAP information.
  • FIGS. 4 and 5 Functional block diagrams of the base station apparatus 10 and the mobile station apparatus 100 according to the present embodiment are shown in FIGS. 4 and 5, respectively.
  • the base station apparatus 10 includes a communication unit 20, a signal processing unit 30, and a control unit 50 as functional configurations.
  • the signal processing unit 30 includes a symbol synchronization unit 32, a Fourier transform unit 34, a timing estimation unit 36, a frequency 'channel estimation unit 38, a demodulation unit 40, a fixed modulation data generation unit 42, and an adaptive modulation data generation unit 44. And a modulation unit 46 and an inverse Fourier transform unit 48.
  • mobile station apparatus 100 includes a communication unit 120, a signal processing unit 130, and a control unit 150 as functional configurations.
  • the signal processing unit 130 includes a symbol synchronization unit 132, a Fourier transform unit 134, a timing estimation unit 136, a frequency / channel estimation unit 138, a demodulation unit 140, a fixed modulation data demodulation unit 140A, an adaptive modulation data demodulation unit 140B, and fixed modulation data.
  • a generation unit 142, an adaptive modulation data generation unit 144, a modulation unit 146, and an inverse Fourier transform unit 148 are included.
  • the communication unit 20 receives the signal in the carrier band transmitted from the mobile station device 100 via the antenna 22.
  • the received signal is amplified, converted to an intermediate frequency, and A / D converted, and then converted to an OFDM baseband signal.
  • Symbol synchronization section 32 performs symbol synchronization using a guard interval included in the OF DM symbol of the OFDM baseband signal output from communication section 20. Since the guard interval has a correlation with the latter half of the OFDM symbol, the start position of the OFDM symbol is detected by detecting the correlation. Then, symbol synchronization is performed based on the detected leading position of the OFDM symbol.
  • communication unit 20 Is sampled over the effective period at the sampling interval of the OFDM baseband signal power Ts / N output by.
  • the sampled data is output after being serial-parallel converted as N signals.
  • a complex symbol sequence that modulates each carrier is extracted by discrete Fourier transform (DFT). If the sampling interval of Ts / N is constant, the discrete Fourier transform (DFT) can be replaced with a fast Fourier transform (FFT).
  • DFT discrete Fourier transform
  • FFT fast Fourier transform
  • the extracted symbols are parallel-serial converted and then output as frequency-domain OFDM demodulated signals.
  • the timing estimation unit 36 and the frequency / channel estimation unit 38 perform processing for correcting the influence of the characteristics of the transmission path on the OFDM demodulated signal output from the Fourier transform unit 34.
  • the characteristics of the transmission path are estimated using pilot symbols in the OFDM demodulated signal.
  • the timing estimation unit 36 performs interpolation in the time direction for the OFDM demodulated signal
  • the frequency ′ channel estimation unit 38 performs interpolation in the frequency direction of the OFDM demodulated signal.
  • demodulator 40 the data bit string is restored based on the OFDM demodulated signal whose influence due to the characteristics of the transmission path is corrected in timing estimation unit 36 and frequency ′ channel estimation unit 38.
  • the data bit string is restored by symbol determination according to the modulation method of the OFDM demodulated signal.
  • the data bit string demodulated by the demodulator 40 is output to the controller 50.
  • the control unit 50 determines the communication quality of each sub-channel based on the received uplink signal. Then, based on the determined communication quality, a communication subchannel to be allocated to mobile station apparatus 100, a modulation scheme of adaptive modulation data (communication data), and the like are determined. Then, the control unit 50 generates control information (MAP, ACK, MI) based on the determined information.
  • the fixed modulation data generation unit 42 generates fixed modulation data based on the control information generated by the control unit 50. Details of the fixed modulation data generation processing in the fixed modulation data generation unit 42 will be described with reference to the flowchart shown in FIG.
  • the fixed modulation data generation unit 42 receives control information (MAP, ACK, MI) from the control unit 50 (S101). Then, the fixed modulation data generation unit 42 calculates a CRC code for a CRC calculation area (see FIG. 3) composed of MAP, ACK, and MI (S102). The calculated CRC code is added to the rear of the CRC calculation area (S102).
  • the fixed modulation data generation unit 42 generates a scramble sequence having the same data length as the scramble area (see FIG. 3) formed by adding a CRC code to the CRC calculation area (S103).
  • the scramble sequence is generated, for example, by inputting the CS-ID that is the identifier of the base station apparatus 10 as an initial value into the shift registers S0 to SI5 shown in FIG. Made.
  • the information used as the initial value may be negotiated and determined in advance by the base station device 10 and the mobile station device 100.
  • scramble coding is performed on the scrambled area data by calculating ExOR between the scrambled area data and the generated scramble sequence (S104).
  • the data in the scrambled area that has been subjected to scramble coding is subjected to error correction coding by, for example, an 8PSK trellis coding circuit shown in FIG. 8 (S 105).
  • a TAIL bit of 0 is added to the end of the scrambled area data that has been subjected to error correction coding (S105). As described above, the TAIL bit is added to set the value of the shift register of the encoding circuit to zero.
  • the fixed modulation data generation unit 42 generates fixed modulation data (including control information) with a fixed modulation scheme.
  • adaptive modulation data generation section 44 generates adaptive modulation data.
  • Adaptive modulation data is mainly communication data carried by ESCH.
  • the adaptive modulation data is generated by performing predetermined coding such as symbol interleaving, scramble coding, CRC code addition, error correction coding, etc., on the data bit string transmitted to the mobile station apparatus 100. .
  • the fixed modulation data formed in the fixed modulation data generation unit 42 is converted into a complex symbol string according to a fixed modulation method.
  • the adaptive modulation data formed in the adaptive modulation data generation unit 44 is converted into a complex symbol sequence according to the modulation scheme specified by Ml included in the control information.
  • inverse Fourier transform unit 48 complex symbol ⁇ IJ generated by the modulation coding unit is serial-parallel converted as N symbol strings and output.
  • the output N symbol strings are batch-converted by the inverse Fourier transform unit 48 to generate sample values of N OFDM symbols.
  • the obtained sample values are parallel-serial converted and then output as a continuous time domain complex OF DM baseband signal.
  • the guard interval (GI) power of the Tg length in the second half of each symbol of the complex OFDM baseband signal output by the inverse Fourier transform unit 48 is the head of each symbol. Added to. The real part of the complex OFDM baseband signal with GI added is multiplied by the carrier wave frequency, and the OFDM signal in the carrier band is output. The output OF DM signal is amplified by the communication unit 20 and then transmitted to the mobile station apparatus 100 via the antenna 22.
  • GI guard interval
  • the communication unit 120 receives a signal transmitted from the base station apparatus 10 via an antenna.
  • the received signal is subjected to amplification, conversion to an intermediate frequency, and A / D conversion, and then converted to an OFDM baseband signal.
  • Symbol synchronization section 132 performs symbol synchronization using a guard interval included in the OFDM baseband signal output from communication section 120.
  • Fourier transform section 134 a complex symbol sequence that modulates each carrier is extracted by performing a Fourier transform on the OFDM baseband signal.
  • the extracted symbols are parallel-serial converted and then output as frequency-domain OFDM demodulated signals.
  • Timing estimation section 136 performs time direction interpolation on the OFDM demodulated signal
  • frequency / channel estimation section 138 performs frequency direction interpolation of the OFDM demodulated signal. In this way, the influence of the channel characteristics on the OFDM demodulated signal output from the Fourier transform section 134 is corrected.
  • Demodulation section 140 demodulates the data bit string from the OFDM demodulated signal output from timing estimation section 136.
  • the demodulator 140 includes a fixed modulation data demodulator 140A and an adaptive modulation data demodulator 140B. Each unit demodulates the fixed modulation data and demodulates the adaptive modulation data. The demodulation processing performed in the demodulation unit 140 will be described with reference to the flowchart of FIG.
  • An OFDM demodulated signal is input to fixed modulation data demodulator 140A (S201). Then, error correction processing is performed on the input OFDM demodulated signal (S202). And After error correction is performed, scramble-encoded scrambled area data is acquired from the fixed modulation data included in the OFDM demodulated signal (S202).
  • fixed modulation data demodulation section 140A generates a scramble sequence having the same data length as that of the scramble area (S203). This scramble sequence is generated by inputting the CS-ID of the base station apparatus 10 as an initial value into a shift register circuit as shown in FIG. 7 in the same manner as the processing in the base station apparatus 10. Then, fixed modulation data decoding section 140A performs decoding (descrambling) by calculating ExOR between the generated scramble sequence and the received scrambling area data (S204).
  • Fixed modulation data demodulation section 140A performs error detection based on the CRC code for the decoded scrambled area data (S205).
  • error detection scrambled area data is divided by the bit string indicated by the generator polynomial. If there is no remainder, it is determined that the data is accurate, and if there is a remainder, it is determined that the data has an error. To do.
  • control section 150 determines the communication channel. It is set that there is no assignment (S207). This prevents signals from being transmitted according to MAP information containing errors. If no error is detected in the decoded fixed modulation data in fixed modulation data demodulation section 140A (S206: N), control section 150 uses the communication channel (A (SCH, ESCH) are set (S208).
  • adaptive modulation data demodulation section 140B adaptive modulation data is demodulated into a data bit string by symbol determination according to the modulation method indicated by MI in the control information.
  • the demodulated data bit string is output to control section 150.
  • control information including allocation channel information is scrambled using information shared between the base station apparatus and the mobile station apparatus, so that erroneous allocation channel information cannot be decoded. By doing so, it is possible to prevent signals from being transmitted based on incorrect allocation channel information.
  • the power using the CS-ID of the base station device is used as the PS-ID of the mobile station device. It's okay! /, And other identification information can be used! /.
  • the present invention is applied to an OFDMA mobile communication system.
  • the present invention is also applicable to a mobile communication system employing other multi-channel communication systems. .

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

Abstract

L'objet de cette invention est d'éliminer les interférences de communication entre des dispositifs de station de base et des dispositifs de station mobile voisins provoquées par les communication d'un dispositif de station mobile réalisées selon des informations de canal d'attribution reçues avec une erreur. Un dispositif de station de base (10A) transmet des informations de commande, qui contiennent des informations de canal d'attribution en vue de spécifier les informations d'un canal de communication à attribuer à un dispositif de station mobile (100A), par ajout d'un code de détection d'erreur. Le dispositif de station mobile (100A) reçoit les informations de commande transmises par le dispositif de station de base (10A), et détecte une erreur dans les informations de canal d'attribution sur la base du code de détection d'erreur ajouté aux informations de commande reçues. Lorsqu'une erreur est détectée, le dispositif de station mobile commande un signal ne devant pas être transmis au moyen du canal de communication spécifié par les informations de canal d'attribution.
PCT/JP2007/068290 2006-09-27 2007-09-20 Système de communication mobile, procédé de communication sans fil, dispositifs de station de base et de station mobile WO2008041495A1 (fr)

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JP2006263492A JP2008085672A (ja) 2006-09-27 2006-09-27 移動体通信システム、無線通信方法、基地局装置及び移動局装置

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WO2010071356A2 (fr) 2008-12-16 2010-06-24 Samsung Electronics Co., Ltd. Procédé et appareil pour identifier l'accessibilité des stations de base femto dans des systèmes de communication
EP2359665A2 (fr) * 2008-12-16 2011-08-24 Samsung Electronics Co., Ltd. Procédé et appareil pour identifier l'accessibilité des stations de base femto dans des systèmes de communication
EP2359665A4 (fr) * 2008-12-16 2014-05-07 Samsung Electronics Co Ltd Procédé et appareil pour identifier l'accessibilité des stations de base femto dans des systèmes de communication
US9143275B2 (en) 2008-12-16 2015-09-22 Samsung Electronics Co., Ltd. Methods and apparatus to identify the accessibility of femto-base stations in communication systems
US9215036B2 (en) 2008-12-16 2015-12-15 Samsung Electronics Co., Ltd. Methods and apparatus to identify the accessibility of base stations in communication systems

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