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WO2008054126A1 - Procédé et dispositif permettant de créer un canal physique commun - Google Patents

Procédé et dispositif permettant de créer un canal physique commun Download PDF

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Publication number
WO2008054126A1
WO2008054126A1 PCT/KR2007/005409 KR2007005409W WO2008054126A1 WO 2008054126 A1 WO2008054126 A1 WO 2008054126A1 KR 2007005409 W KR2007005409 W KR 2007005409W WO 2008054126 A1 WO2008054126 A1 WO 2008054126A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
generating
signal
channel signal
secondary synchronization
Prior art date
Application number
PCT/KR2007/005409
Other languages
English (en)
Inventor
Tae-Joong Kim
Gi-Yoon Park
Il-Gyu Kim
Chan-Bok Jeong
Hyeong-Jun Park
Original Assignee
Electronics And Telecommunications Research Institute
Samsung Electronics.Co., Ltd.
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
Priority claimed from KR1020070098706A external-priority patent/KR100945859B1/ko
Application filed by Electronics And Telecommunications Research Institute, Samsung Electronics.Co., Ltd. filed Critical Electronics And Telecommunications Research Institute
Priority to US12/513,083 priority Critical patent/US8189558B2/en
Publication of WO2008054126A1 publication Critical patent/WO2008054126A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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

Definitions

  • the present invention relates to a method and device for generating a common channel in a downlink.
  • OFDM orthogonal frequency division multiplexing
  • WiMAX WiMAX and 3GPP long term evolution (LTE) that is one of the mobile communication skills having acquired mobility as well as the digital broadcasting.
  • LTE long term evolution
  • the downlink OFDM of the 3GPP LTE distinguishes a frequency resource by using subcarriers having a minimum frequency unit, and distinguishes a time resource by using sub-frames having a minimum time unit and including a plurality of OFDM symbols.
  • a sub-frame for distinguishing the time resource includes 7 OFDM symbols in consideration of a small cell radius in the 3GPP
  • a sub-frame includes 6 OFDM symbols that are long symbols.
  • Common channels of the downlink include a primary synchronization channel (P-SCH) that is used for a mobile station to acquire sub-frame time synchronization, a secondary synchronization channel (S-SCH) that is used to find a cell group and acquire frame synchronization, a secondary broadcasting channel (SBCH) that is used to broadcast variable information of a cell, and a pilot channel (PCH) that is used for the mobile station to identify the cell and that is used to transmit a reference symbol.
  • P-SCH primary synchronization channel
  • S-SCH secondary synchronization channel
  • SBCH secondary broadcasting channel
  • PCH pilot channel
  • the frequency resource used for a primary broadcasting channel is determined by the 3GPP LTE from among the many channels. That is, the primary broadcasting channel is determined to use 72 subcarriers with reference to the central frequency, and the time resource for transmitting the primary broadcasting channel, the transmission diversity method, and the method for notifying the primary broadcasting channel's transmission diversity are not yet determined.
  • the 3GPP LTE has not yet described the organic relationship between the downlink common channels, and an integrated mobile station process is difficult to describe. Also, regarding the 3GPP LTE standardization process, the usage of a common channel is determined and limited contents for respective channels are determined, but a method for generating the common channel has not yet been described in detail.
  • the present invention has been made in an effort to provide a method and device for transmitting a common channel. More particularly, the present invention has been made in another effort to provide a method and device for generating a common channel in a downlink. [Technical Solution]
  • a device for generating a common channel for a downlink by a base station having a plurality of antennas includes: a common channel generator for generating a common channel signal for generating a common channel for transmitting common data to be provided to a plurality of mobile stations through the downlink, the common channel signal including a primary synchronization channel signal, a secondary synchronization channel signal, a pilot channel signal, and a primary broadcasting channel signal; an antenna mapper for mapping the generated common channel signal on the plurality of antennas; a multiplexer for receiving the common channel signal mapped on the antennas according to the antennas, allocating the common channel signal to the subcarrier and the time resource in the order of the primary broadcasting channel signal, the secondary synchronization channel signal, and the primary synchronization channel signal, and outputting a symbol; and a scrambler for scrambling the output symbol by using a scramble sequence.
  • a method for generating a common channel for a downlink by a base station having a plurality of antennas includes: generating a common channel signal for generating a common channel for generating common data to be provided to a plurality of mobile stations through the downlink, the common channel signal including a primary synchronization channel signal, a secondary synchronization channel signal, and a primary broadcasting channel signal; mapping the generated common channel signals on the plurality of antennas; and receiving the common channel signals mapped on the plurality of antennas according to the plurality of antennas, allocating the common channel signals to the subcarrier and the time resource in the order of a predetermined primary broadcasting channel, a secondary synchronization channel, and a primary synchronization channel, and outputting a symbol.
  • receiving performance can be improved and a simple initial process of the mobile station can be acquired by efficiently allocating the resource of the physical channel caused by the common channel to the mobile station.
  • FIG. 1 shows a configuration diagram of a common channel transmitter according to an exemplary embodiment of the present invention.
  • FIG. 2 shows a flowchart for a common channel transmitting method according to an exemplary embodiment of the present invention.
  • FIG. 3 shows a flowchart for a common channel mapping method according to an exemplary embodiment of the present invention.
  • a unit, a device, and a module in the present specification represent a unit for processing a predetermined function or operation, which can be realized by hardware, software, or a combination of hardware and software.
  • the mobile station can be a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station
  • PSS user equipment
  • UE user equipment
  • AT access terminal
  • the base station can be an access point (AP), a radio access station (RAS), a node B, a base transceiver station (BTS), and a mobile multihop relay (MMR)-BS, and can include part or all the functions of the access point, the access station, the node B, the base transceiver station, and the MMR-BS.
  • AP access point
  • RAS radio access station
  • BTS base transceiver station
  • MMR mobile multihop relay
  • the downlink of the 3GPP LTE will be exemplified from among various communication systems in the exemplary embodiment of the present invention, and the exemplary embodiment of the present invention will not be limited thereto. Also, various common channels of the downlink will now be described.
  • the common channel represents a channel for a base station to broadcast (or transmit) common data to a plurality of mobile stations.
  • the common channel of the downlink is classified as a primary synchronization channel (P-SCH) that is used for a mobile station to acquire sub-frame time synchronization, a secondary synchronization channel (S- SCH) that is used to find a cell group and acquire frame synchronization, a secondary broadcasting channel (SBCH) that is used to broadcast variable information of a cell, and a pilot channel (PCH) that is used for the mobile station to identify the cell and that is used to transmit a reference symbol.
  • P-SCH primary synchronization channel
  • S- SCH secondary synchronization channel
  • SBCH secondary broadcasting channel
  • PCH pilot channel
  • the primary synchronization channel and the secondary synchronization channel are used for the mobile station to acquire information on the cell group to which the mobile station belongs, and for frame time information.
  • the channels transmit data from the base station to the mobile station twice in the 10ms frame by using the time division multiplexing (TDM) scheme.
  • TDM time division multiplexing
  • the primary synchronization channel uses a subcarrier with 36 sequences that are alternately selected, and the secondary synchronization channel is allocated with reference to the central frequency by using 72 subcarriers. Since the allocated primary synchronization channel and the secondary synchronization channel transmit data by using different time resources, orthogonality for the time resource can be acquired.
  • the base station can allocate the primary synchronization channel and the secondary synchronization channel to the OFDM symbol by using two methods.
  • the first method is to allocate the primary synchronization channel and the secondary synchronization channel to different OFDM symbols from the same sub-frame.
  • the first method can improve the detection performance of the secondary synchronization channel by applying the channel estimate through the primary synchronization channel to the receiving of the secondary synchronization channel.
  • the second method is to differentiate the sub-frames of data that are transmitted through the primary synchronization channel and the secondary synchronization channel, and fixing the time resource to the last OFDM symbol that corresponds to the short symbol.
  • Cyclic prefixes (CP) can have the same value in the initial cell.
  • the pilot channel for transmitting the pilot signal and the reference symbol is used for the mobile station to estimate the channel or measure the channel quality indicator (CQI). Also, the pilot channel is used for the mobile station to identify the cell to which the mobile station belongs by using the cell group information acquired through the primary synchronization channel and the secondary synchronization channel and the frame time information of the cell. For this purpose, the pilot channel is generated based on a random sequence commonly allocated to the cell group and an orthogonal sequence allocated to the cell. That is, in order to identify the cell to which the mobile station belongs, the mobile station searches for the random sequence that corresponds to the cell group found in the secondary synchronization channel and the orthogonal sequence that is allocated to the cell and thereby identifies the corresponding cell.
  • CQI channel quality indicator
  • the reference symbol that is transmitted through the pilot channel includes two reference symbols (a first reference symbol and a second reference symbol).
  • the first reference symbol is inserted into the first OFDM symbol of the sub-frame and is then transmitted for each 0.5ms and with intervals of 6 subcarriers.
  • the second reference symbol configures a subcarrier offset together with the first reference symbol, and it is inserted into the OFDM and is then transmitted in the middle of the sub-frame for each 0.5ms and with intervals of 6 subcarriers.
  • the base station transmits data by using a plurality of transmit antennas, it is needed to acquire the orthogonality between the pilot channels that are transmitted by the antennas.
  • the orthogonality means that the data that are transmitted by a plurality of antennas are orthogonal, and the data transmitted by the antennas are identifiable since the product of the orthogonal data is 0.
  • up to 2 antennas use the FDM scheme in the pilot channel transmitted by a single cell.
  • the first antenna uses a reference symbol for data transmission
  • the second antenna transmits no signal to the corresponding reference resource, and hence the transmission data are identified.
  • the first antenna transmits no signal to the resource that corresponds to the reference symbol transmitted by the second antenna, the data are identified.
  • the data are depicted to be identified, and the data can be described to have acquired the orthogonality in a broader meaning.
  • FIG. 1 shows a configuration diagram of a common channel transmitter according to an exemplary embodiment of the present invention.
  • the common channel transmitter includes a common channel generator 100, a symbol modulator 200, a channel gain unit 300, an antenna mapper 400, a multiplexer 500, a scrambler 600, a modulator 700, a filter 800, and a transmission controller 900.
  • the common channel generator 100 for generating the common channel of the downlink includes a primary synchronization channel generator 110, a secondary synchronization channel generator 120, a pilot channel generator 130, a primary broadcasting channel generator 140, an additional common channel generator 150, and a scramble sequence generator 160.
  • the primary synchronization channel generator 110 generates a primary synchronization channel signal used for the mobile station to acquire sub-frame time synchronization.
  • the secondary synchronization channel generator 120 generates a secondary synchronization channel signal that is used for the mobile station to search for the cell group to which the mobile station belongs and acquire frame synchronization.
  • the secondary synchronization channel generator 120 includes a secondary synchronization channel sequence generating module 121 for generating a secondary synchronization channel sequence, a secondary synchronization modulation signal generating module 122 for generating a secondary synchronization modulation signal for modulating the secondary synchronization channel, and a secondary synchronization symbol generating module 123 for generating a secondary synchronization channel signal by multiplying the secondary synchronization channel sequence generated by the secondary synchronization channel sequence generating module 121 and the secondary synchronization modulation signal generated by the secondary synchronization modulation signal generating module 122.
  • the secondary synchronization symbol generating module 123 is described to be a multiplier.
  • the pilot channel generator 130 generates a pilot signal and a reference symbol to be used for the mobile station to check the cell in which the mobile station is located.
  • the pilot channel generator 130 includes a reference sequence generating module 131 for generating a reference sequence that is allocated to the cell group to which the mobile station belongs, an orthogonal sequence generating module 132 for generating an orthogonal sequence that is used to identify the cell in the cell group including a plurality of cells, and a reference symbol generating module 133 for generating a pilot channel signal that is used for the reference symbol by multiplying the reference sequence and the orthogonal sequence.
  • the reference symbol is similar to the pilot channel.
  • the reference symbol generating module 133 is described to be a multiplier.
  • the primary broadcasting channel generator 140 generates a primary broadcasting channel signal that is used for the base station to broadcast fixed information to the cell.
  • the additional common channel generator 150 generates various common channel signals that are not given in the above description.
  • the additional common channel includes a paging channel, a broadcast message channel, and a paging indication channel.
  • the scramble sequence generator 160 generates a scramble sequence that is used for the scrambler 600 to perform a scrambling process.
  • the symbol modulator 200 modulates the symbol by using a plurality of common channels generated by the common channel generator 100.
  • the channel gain unit 300 receives the symbol-modulated signal from the symbol modulator 200, and applies the gains of a plurality of common channels thereto.
  • the antenna mapper 400 performs transmission diversity on a plurality of antennas by using the signal to which the channel gain is applied when the base station has a plurality of antennas.
  • the multiplexer 500 receives the signal to which the transmission diversity is performed by the antenna mapper 400 through the respective antennas, allocates the signal to a predetermined subcarrier and a resource (i.e., OFDM according to the exemplary embodiment of the present invention), and outputs a signal including an in-phase signal and a quadrature-phase signal.
  • the scrambler 600 scrambles the signal multiplexed by the multiplexer 500 by using a scramble sequence generated by the scramble sequence generator 160.
  • the modulator 700 receives the scrambled signal from the scrambler 600 and modulates the signal.
  • the modulator 700 includes an in-phase inverse fast Fourier transform (FFT) module 710, an in-phase cyclic prefix
  • CP CP
  • quadrature phase inverse FFT module 730 CP module 740
  • quadrature phase CP module 740 quadrature phase CP module 740.
  • the in-phase inverse FFT module 710 and the quadrature phase inverse FFT module 730 apply inverse FFT on the in-phase signal and the quadrature phase signal scrambled by the scrambler
  • the in-phase CP module 720 and the quadrature phase CP module 740 insert a CP into each inverse FFT-performed signal, and output resultant signals.
  • the OFDM modulation is performed in the exemplary embodiment of the present invention, to which the present invention is not restricted.
  • the filter 800 filters the OFDM-modulated signal by the modulator
  • the filter 800 includes an in-phase filter module 810 and a quadrature phase filter module 820, receives the in-phase signal and the quadrature phase signal OFDM-modulated by the modulator
  • the transmission controller 900 controls the common channel generator 100, the symbol modulator 200, the channel gain unit 300, the antenna mapper 400, the multiplexer 500, the scrambler 600, the modulator 700, and the filter 800 of the transmitter.
  • FIG. 2 shows a flowchart for a common channel transmitting method according to an exemplary embodiment of the present invention.
  • the common channel generator 100 generates a plurality of downlink common channels (S100). That is, the primary synchronization channel generator 110 of the common channel generator 100 generates sequences with a length of 36 that are used for the primary synchronization channel sequence, and alternately arranges the generated 36 sequences to thus generate a primary synchronization channel signal to be allocated to 72 subcarriers. In this instance, the signal output by the primary synchronization channel generator 1 10 has a complex value.
  • the secondary synchronization channel signal is generated by the secondary synchronization channel generating module 120 as follows. First, the secondary synchronization channel sequence generating module 121 generates secondary synchronization channel sequences allocated to a plurality of cell groups within the coverage of the base station, and the secondary synchronization modulation signal generating module 122 generates a secondary synchronization modulation signal for modulating the secondary synchronization channel.
  • the secondary synchronization channel sequence generated by the secondary synchronization channel sequence generating module 121 has a complex value.
  • the complex signal uses one of "1 + j", "1 - j", "-1 + j", and "-1 - j", and the 4 signals each have their own function.
  • the 4 signals are generated so as to provide additional information about the secondary synchronization channel to the mobile station.
  • the information includes first information for indicating a start time of the secondary synchronization channel and second information for indicating the number of transmit antennas.
  • the secondary synchronization channel of the frame is transmitted with intervals of 5ms. In this instance, when the same sequence is used to transmit the data by using the secondary synchronization channel, the time reference of 5ms for the secondary synchronization channel can be found and the time reference of the 10ms frame that is the entire frame cannot be found.
  • the first sequence can be used for transmission of the first secondary synchronization channel of the 10ms frame, and the second sequence can be used for transmission of the second secondary synchronization channel. Further, it is possible to allocate the sequences with the length of 144 to the cell group, use the first 72 sequences for the first transmission, and use the next 72 sequences for the second transmission.
  • a modulation signal is used so as to identify the first sequence and the second sequence.
  • the first sequence and the second sequence are identifiable by using the 1-bit modulation signal information.
  • the mobile station On having received the secondary synchronization channel signal by using the secondary synchronization channel, the mobile station receives a pilot channel signal to identify the cell to which the mobile station belongs.
  • the secondary synchronization channel uses TSTD and the pilot channel uses the frequency allocated per antenna and the signal allocated to the resource, the mobile station must check whether transmission diversity is applied to the primary broadcasting channel so as to receive the pilot channel.
  • the mobile station when the mobile station can receive information on the neighboring cell such as a handover in advance, the mobile station can check the state of transmission diversity of the neighboring cell in advance. However, since no information is obtained from the case of an initial cell search, it is needed to instantly check the transmission diversity when receiving the secondary synchronization channel. For this purpose, a modulation signal is required.
  • the mobile station can detect all primary broadcasting channels transmitted by the base station and check the detection result, which however uses a long detection time since there are many primary broadcasting channels to be detected. Therefore, when the secondary synchronization channel is transmitted after the transmission diversity information is applied thereto, it means that the detection means is applied without influencing the system performance, and hence it is possible to reduce the detection time and check the state of transmission diversity.
  • the secondary synchronization symbol generating module 123 of the secondary synchronization channel generator 120 generates a secondary synchronization channel signal by multiplying the secondary synchronization channel sequence generated by the secondary synchronization channel sequence generating module 121 and the secondary synchronization modulation signal output by the secondary synchronization modulation signal generating module 122.
  • the pilot channel generator 130 of FIG. 2 generates a reference symbol (or a pilot channel signal).
  • the reference sequence generating module 131 generates a sequence for the reference symbol that is allocated for each cell group
  • the orthogonal sequence generating module 132 generates an orthogonal sequence used for identifying the cell in the cell group.
  • the reference symbol generating module 133 generates a pilot channel signal by multiplying the sequence for the reference symbol generated by the reference sequence generating module 131 and the orthogonal sequence generated by the orthogonal sequence generating module 132.
  • the primary broadcasting channel generator 140 in FIG. 1 generates a primary broadcasting channel signal for broadcasting common information.
  • the broadcasting channel broadcasts cell information, and uses the primary broadcasting channel and the secondary broadcasting channel.
  • Cell information that is not changed is transmitted to the primary broadcasting channel, and the primary broadcasting channel is used to measure the initial operation or the handover by the mobile station.
  • the secondary broadcasting channel is used to transmit information including a parameter that is variable by conditions. Therefore, it is needed for the mobile station to receive the primary broadcasting channel so as to search for the cell through the initial operation, and the mobile station can find a mobile station to be reported by using the primary broadcasting channel in the case of measuring the neighboring cell for the handover.
  • the primary broadcasting channel according to the exemplary embodiment of the present invention will now be described.
  • the additional common channel generator 150 in FIG. 1 generates the primary synchronization channel signal, the secondary synchronization channel signal, the pilot channel signal, and the additional common channel signals other than the broadcasting channel signal.
  • the symbol modulator 200 modulates and outputs the primary synchronization channel signal, the secondary synchronization channel signal, the pilot channel signal, the primary broadcasting channel signal, and the additional common channel signal generated by the common channel generator 100.
  • the signal output by the primary synchronization channel generator 110 has a complex value, and the symbol modulator 200 may not perform the symbol modulation process.
  • the channel gain unit 300 multiplies the signal and the channel gain that satisfies the power allocated to the primary synchronization channel (S120), and outputs a resultant signal to the antenna mapper 400.
  • the antenna mapper 400 maps the signal for each antenna (S130) in consideration of the transmission diversity applied to the primary synchronization channel.
  • the primary synchronization channel uses the time switched transmit diversity (TSTD) scheme so that a plurality of antennas may alternately transmit the data
  • the antenna that is allocated to transmit the data with reference to the designated time is controlled to alternately transmit the data.
  • TSTD time switched transmit diversity
  • the multiplexer 500 multiplexes the frequency resource allocated to the primary synchronization channel and the signals mapped on the time resource for the respective antennas (S140). Since the primary synchronization channel has a great uncertainty for the time synchronization in the time dimension, it is needed to transmit data to the mobile station by using the last symbol of the OFDM symbol so as to reflect the unreliability. In this instance, the primary synchronization channel transmits data at regular intervals of 5ms.
  • the primary synchronization channel For the mobile station estimates the channel by using the primary synchronization channel and detects the secondary synchronization channel through the coherent method so as to acquire the system's performance improvement, the primary synchronization channel is maintained the orthogonality through the TDM scheme and is transmitted at the time position adjacent to the primary synchronization channel.
  • the pilot channel is transmitted for each antenna according to the FDM scheme when the base station has multiple antennas.
  • the scrambler 600 in FIG. 2 scrambles the OFDM symbol in which the common channels are included (S150), and the modulator 700 modulates the OFDM symbol that is input as a quadrature phase together with the in-phase symbol
  • the in-phase signal and the quadrature phase signal modulated by the modulator 700 are input to the filter 800, are then filtered (S170), and are then transmitted to the mobile station.
  • the common channel is described to be generated according to an order in the exemplary embodiment of the present invention, and the present invention is not restricted thereto.
  • symbol modulation by the symbol modulator 200, channel gain reflection by the channel gain unit 300, antenna mapping by the antenna mapper 400, signal scrambling by the scrambler 600, modulation by the modulator 700, filtering by the filter 800, and controlling by the controller 900 are known to a person skilled in the art, and hence will not be described in the exemplary embodiment of the present invention.
  • FIG. 3 shows a flowchart for a common channel mapping method according to an exemplary embodiment of the present invention.
  • the multiplexer 500 receives the common channel that is generated by the common channel generator 100 and has undergone the modulation, the channel gain reflection, and the antenna mapping (S 141 ).
  • the multiplexer 500 allocates the primary synchronization channel, the secondary synchronization channel, and the primary broadcasting channel to the symbols at specific positions. Since the primary synchronization channel has a great uncertainty for the time synchronization in the time domain, the primary synchronization channel is allocated to the last symbol of the OFDM symbol so as to reflect the uncertainty (S142).
  • the secondary synchronization channel is allocated to the OFDM symbol so as to be adjacent to the primary synchronization channel (S143).
  • the secondary synchronization channel is allocated to be adjacent to the primary synchronization channel so that the mobile station may estimate the channel based on the primary synchronization channel and detect the secondary synchronization channel according to the coherent method.
  • the primary broadcasting channel is allocated to the OFDM symbol prior to the secondary synchronization channel (S144). This is because the primary broadcasting channel can be allocated to the same location as the reference symbol of the pilot channel when there is a lot of primary synchronization channel information and a plurality of OFDM symbols are used.
  • the primary broadcasting channel signal is allocated to the frequency resource allocated to the primary broadcasting channel irrespective of the pilot channel, and the reference symbol is punched in the resource for transmitting the pilot channel so that the respective resources may be allocated since the method for coding the primary broadcasting channel is not changed, irrespective of the number of transmit antennas.
  • the encoding scheme is used by assuming the case of using a plurality of antennas so as to use the same encoding scheme, the case of a single antenna uses less resources and hence performance degradation can occur.
  • the above-described embodiments can be realized through a program for realizing functions corresponding to the configuration of the embodiments or a recording medium for recording the program in addition to through the above-described device and/or method, which is easily realized by a person skilled in the art.

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

Abstract

Procédé et dispositif permettant de créer un canal commun dans une liaison descendante. L'attribution efficace de ressource et la création d'un canal commun en liaison descendante procure une amélioration de la réception par la station mobile. Par ailleurs., la diversité de transmission appliquée aux antennes de transmission de la station et base et canal commun peuvent être facilement détectés, ce qui permet d'acquérir le processus initial de la station mobile.
PCT/KR2007/005409 2006-11-01 2007-10-30 Procédé et dispositif permettant de créer un canal physique commun WO2008054126A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/513,083 US8189558B2 (en) 2006-11-01 2007-10-30 Method and apparatus for creating common physical channel

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20060107247 2006-11-01
KR10-2006-0107247 2006-11-01
KR10-2007-0098706 2007-10-01
KR1020070098706A KR100945859B1 (ko) 2006-11-01 2007-10-01 하향 링크에서 공통 채널의 생성 방법 및 장치

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WO2008054126A1 true WO2008054126A1 (fr) 2008-05-08

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN102957650A (zh) * 2011-08-17 2013-03-06 国家广播电影电视总局广播科学研究院 数字音频广播系统中业务描述信息的发送接收方法及装置

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Publication number Priority date Publication date Assignee Title
US20050169349A1 (en) * 1999-08-17 2005-08-04 Samsung Electronics Co., Ltd. Method for communicating scrambling code ID in mobile communication system
US20060120332A1 (en) * 2003-06-13 2006-06-08 Markus Ali-Hackl Power control for a mobile radio communication system
US20060166690A1 (en) * 2002-09-19 2006-07-27 Matsushita Electric Industrial Co., Ltd. Transmission power control method and base station device

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20050169349A1 (en) * 1999-08-17 2005-08-04 Samsung Electronics Co., Ltd. Method for communicating scrambling code ID in mobile communication system
US20060166690A1 (en) * 2002-09-19 2006-07-27 Matsushita Electric Industrial Co., Ltd. Transmission power control method and base station device
US20060120332A1 (en) * 2003-06-13 2006-06-08 Markus Ali-Hackl Power control for a mobile radio communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102957650A (zh) * 2011-08-17 2013-03-06 国家广播电影电视总局广播科学研究院 数字音频广播系统中业务描述信息的发送接收方法及装置

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