WO2008038352A1 - Dispositif de communication sans fil - Google Patents

Dispositif de communication sans fil Download PDF

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Publication number
WO2008038352A1
WO2008038352A1 PCT/JP2006/319189 JP2006319189W WO2008038352A1 WO 2008038352 A1 WO2008038352 A1 WO 2008038352A1 JP 2006319189 W JP2006319189 W JP 2006319189W WO 2008038352 A1 WO2008038352 A1 WO 2008038352A1
Authority
WO
WIPO (PCT)
Prior art keywords
subband
data
transmitted
cell
synchronization channel
Prior art date
Application number
PCT/JP2006/319189
Other languages
English (en)
Japanese (ja)
Inventor
Yoshihiro Kawasaki
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to JP2008536235A priority Critical patent/JP4847537B2/ja
Priority to PCT/JP2006/319189 priority patent/WO2008038352A1/fr
Publication of WO2008038352A1 publication Critical patent/WO2008038352A1/fr

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Classifications

    • 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
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference 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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2604—Multiresolution systems
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0066—Requirements on out-of-channel emissions

Definitions

  • the present invention relates to a wireless communication apparatus having a configuration for shortening an instantaneous interruption of a voice call and enabling effective transmission of broadcast data.
  • real-time voice data is transmitted as a voice packet even in a radio section.
  • user data includes non-real-time (NRT) data such as e-mail data, Web data, and download data from FTP servers.
  • NRT non-real-time
  • Real-time voice data is generally analog voice waveform data that is voice-coded and packetized every 20 to 30 ms, and the size of each voice packet is small.
  • voice packets When transmitting voice packets, low transmission delay characteristics and low transmission fluctuation characteristics are required.
  • the size of the accompanying control signal related to transmission control in the wireless section is relatively larger than the payload size of the voice packet compared to the case of NRT data. Therefore, in order to reduce the overhead caused by control signal transmission and improve the efficiency, voice packet transmission in the radio section is performed at a predetermined period in a pre-assigned time section. It is considered to be based on long-term radio resource advance reservation type transmission using a predetermined subband, and scheduling transmission for each packet is not basically applied.
  • FIG. 1 and FIG. 2 are diagrams showing the concept of long-term radio resource advance reservation type transmission.
  • Figure 1 shows the concept of transmitting voice packets based on the long-term radio resource advance reservation type transmission method from a time domain perspective.
  • the time axis is divided into time intervals of a predetermined length, and multiple (6 in the example shown in Fig. 1) audio in each time interval.
  • a packet is sent.
  • Each voice packet is transmitted at regular regular intervals (eg every 20ms).
  • a common modulation scheme and coding rate are optimized for each voice packet transmitted within a certain time interval.
  • FIG. 2 is a diagram showing a concept of a method of assigning radio resources to voice packets for each terminal from the viewpoint of both the time domain and the frequency domain.
  • the frame for transmitting data has a two-dimensional spread in the time and frequency directions.
  • Voice packets for each terminal are placed in a subframe with a two-dimensional spread.
  • the base station side scheduler determines which terminal the packet is placed in which part of the subframe.
  • the scheduler does not decide the allocation of radio resources each time for each voice packet, but a voice packet to a certain terminal is sent at certain intervals of time. Scheduled in units of multiple voice packets.
  • the range of modulation schemes and error correction code rate that can be applied to voice packets transmitted in each time interval is limited, and the modulation scheme and code rate that are applied are limited for voice packet transmission.
  • MBMS Multimedia Broadcast Multicast Service
  • MBMS data includes data that is transmitted only within a certain base station and data that is transmitted simultaneously by multiple adjacent base stations.
  • cell-specific MBMS data the former is referred to as cell-specific MBMS data, and the latter is referred to as cell common (or cell group common) MBMS data.
  • Cell common MBMS data is transmitted in a wide range of areas (in the maximum case, all areas where one mobile carrier provides services) and narrow areas (for example, administrative divisions at the level of a town or village) There are things that are sent in.
  • the multicast type of MBMS data may be transmitted only within the cell, in order to improve the utilization efficiency of radio resources, the user power to subscribe to receiving each target MBMS data ⁇ . Yes.
  • the cell-common MBMS data transmits the same data at the same frequency (subband) at the same time, and multiple target base station powers at the same time.
  • MBMS data is transmitted on the assumption that the terminal can be received anywhere in the cell.
  • FIG. 3 is a diagram illustrating a concept of a cell common MBMS data transmission method in the downlink.
  • Terminal 1 near the boundary between cell 1 of base station 1 and cell 2 of base station 2 receives cell common MBMS data # 1 from base station 1 and cell common MBMS data # 1 from base station 2. To do. In the vicinity of the boundary between cell 2 of base station 2 and cell 3 of base station 3, terminal 2 receives cell common MBMS data # 2 from base station 2 and cell common MBMS data # 2 from base station 3. Receive. Described below in Fig. 3 is an example of radio resource allocation for downlink data within each cell. In cell 1, cell common MBMS data # 1 contains long CP (size Click Prefix) A radio resource is allocated at the right end of the subframe.
  • CP size Click Prefix
  • the radio resources allocated to the cell common MBMS data # 1 in the cell 2 are also in the cell 1. It is the right end of the long CP subframe.
  • the radio resource for the central portion of the long CP subframe is allocated.
  • the power of the OFDM signal is used.
  • the length of the cyclic prefix (hereinafter referred to as CP, which is the same as Guard Interval) attached to each OFDM signal symbol is Two types of subframes consisting of OFDM symbols with different CP lengths are used.
  • a subframe consisting only of OFDM symbols with long! And CP is a long CP subframe, and a subframe consisting only of OFDM symbols with a short CP is a short CP subframe. Both the long CP subframe and the short CP subframe have the same length.
  • the number of OFDM symbols in the subframe is different.
  • long CP subframes and short CP subframes are time multiplexed on the same RF (Radio Frequency) carrier.
  • FIG. 4 is a diagram illustrating the concept of time multiplexing transmission of a short CP subframe and a long CP subframe in the downlink.
  • cast data and cell-specific MBMS data are allocated to the short CP subframe, and low-latency request such as cell-common MBMS data and voice data is allocated to the long CP subframe.
  • Data is allocated.
  • low-delay request data such as audio data is transmitted in all subframes including short CP subframes (not shown in Fig. 4).
  • short CP subframe and long CP subframe 0.5 ms in length
  • the number of effective symbols in the time direction of the short CP subframe is 7 symbols, while that in the long CP subframe is effective in the time direction There are 6 symbols.
  • Cell common MBMS data transmitted simultaneously from multiple base stations and synthesized at the terminal side uses long CP subframes, and is used for normal multicast data or a cell transmitted only within a certain base station.
  • Short CP subframes are used to transmit specific MBMS data.
  • some multicast data and some cell-specific MBMS data may be transmitted even in long CP subframes (not shown in Fig. 4).
  • FIG. 5 is a diagram showing a concept of downlink transmission scheduling for multicast data including voice packets and cell-specific MBMS data.
  • the base station packet scheduler 10 determines how data packets are allocated to each short CP subframe.
  • the knot scheduler is provided with an RTZ voice packet scheduler 11 that schedules real-time (RT) and voice packets and an NRT-cast packet scheduler 12 that schedules non-real-time multicast data.
  • RTZ voice packet scheduler 11 that schedules real-time (RT) and voice packets
  • NRT-cast packet scheduler 12 that schedules non-real-time multicast data.
  • long CP subframes are used when voice packets are transmitted with a predetermined transmission timing pattern. If this happens (when the timing for transmitting a voice packet for a terminal overlaps with the timing using a long CP subframe), it is necessary to transmit the voice packet even in the long CP subframe.
  • FIG. 6 and FIG. 7 are diagrams illustrating examples of radio resource allocation to the synchronization channel.
  • the system bandwidth (the transmission bandwidth that the base station transmits / receives in the wireless zone) is 20 MHz at the maximum, and at the present time, the minimum transmission / reception bandwidth of the terminal is set to 10 MHz.
  • the terminal is required to be capable of receiving a signal with a width of at least 10 MHz. However. Simultaneous decoding of all user data (excluding control signals) contained in a 1 OMHz signal is not required.
  • system bandwidth 15 MHz, 10 MHz, 5 MHz, 2.5 MHz, (1.6 MHz, 1.67 MHz) and 1.25 MHz power S are considered to be supported in addition to 20 MHz.
  • the synchronization channel and broadcast information signal channel (cell and base station A broadcast information channel that transmits information, etc. (hereinafter referred to as the broadcast channel) is located at the center of the system transmission band (Fig. 6). Also, if the system bandwidth is 20 MHz, the synchronization channel broadcast channel is considered to be divided into 20 MHz widths divided into two 10 MHz widths and placed at the center of each 10 MHz width. ( Figure 7).
  • the terminal When the synchronization channel and broadcast channel are located at the center of the system bandwidth, when the terminal performs an initial cell search or handover to an adjacent cell, the terminal sets its own reception center frequency to the center frequency of the system bandwidth. After setting, perform synchronization processing to the target cell, and after synchronization is established, change the reception center frequency according to the instructions of the base station as necessary in order to transmit and receive data.
  • FIG. 8 and FIG. 9 are diagrams for explaining a problem due to handover during a voice call.
  • the terminal during voice communication supplements the synchronization channel transmitted on the downlink of the handover destination cell during the handover.
  • the voice call interruption time during handover may be longer than the time required for handover.
  • FIG. 8 shows a case where the downlink bandwidth is 20 MHz and the reception bandwidth of the receiving terminal is 10 MHz.
  • the synchronization channel is in the middle part of the downlink band, and the voice packet currently received by the receiving terminal is located at the right end of the downlink band in cell # 1, as shown at the top of FIG.
  • reception of the voice packet from cell # 1 is stopped and handover to neighboring cell # 2 is started.
  • the receiving terminal changes the reception center frequency so that the synchronization channel transmitted in cell # 2 can be received.
  • step (3) after the handover to cell # 2 is completed, the voice packet to be transmitted is transmitted using the voice bucket transmission unit (radio resource to which the voice packet to be received is allocated) in adjacent cell # 2.
  • the receiving terminal changes the reception center frequency so that reception is possible.
  • step (4) reception of the voice packet is resumed.
  • FIG. 9 shows a case where the downlink bandwidth is 20 MHz, the reception band of the receiving terminal is 10 MHz, and the synchronization channel is provided at two locations on the frequency axis.
  • the receiving terminal stops receiving voice packets from cell # 1 and starts handover to neighboring cell # 2.
  • the reception center frequency of the receiving terminal is changed so that the voice packet transmitted using the voice packet transmitter in adjacent cell # 2 can be received.
  • voice packet reception is resumed.
  • FIG. 10 is a diagram showing a concept of scheduling for cell-common MBMS data in the downlink.
  • a long CP subframe is inserted (time multiplexed) between short CP subframes transmitted continuously in the downlink.
  • the cell-common MBMS data transmitted in this long CP subframe is transmitted simultaneously from other participating base stations 16 and 17, and is synthesized by the radio unit on the terminal side.
  • RT data such as voice packets is transmitted according to the long-term radio resource advance reservation type transmission, and is also transmitted within the long CP subframe.
  • aGW15 instructs all base stations 16 and 17 involved in transmission at which timing and in which subband.
  • the designated base stations 16 and 17 insert a long CP subframe at a designated timing, and transmit the designated cell common MBMS data using the designated subband in the long CP subframe.
  • the aGW 15 needs to know information on how much radio resources can be used for transmission in each base station 16 and 17. is there.
  • each base station is requested to send radio resource information etc. to aGW15.
  • the radio resource information from each base station 16 and 17 gathers in aGWl 5
  • the aGW 15 sends the cell common MBMS data transmission timing / subband indication information and the MBMS data to be transmitted to each base station. .
  • Figures 11 through 13 illustrate the problems associated with scheduling voice packets and MBMS data.
  • MBMS data There may be multiple numbers (types) of MBMS data transmitted using one long CP subframe, and there are user terminals that subscribe to receive each MBMS data in each cell. To do. In such a case, there is no MBMS device with no user terminal to join. May not transmit in that cell.
  • the aGW For each MBMS data, the aGW performs efficient scheduling / radio resource allocation based on the information sent from each base station so that it is not transmitted in a certain cell.
  • Each base station performs voice packet transmission with long-term radio resource advance reservation type transmission, and the subbands used for voice packet transmission cannot be shared during MBMS data transmission.
  • FIG. 11 shows an example in which the same cell common MBMS data is transmitted in three adjacent cells.
  • the downlink transmission band of each cell is divided into three subbands.
  • subbands for transmitting voice packets in the downlink are fixedly allocated, and sub-bands for transmitting voice packets in three base stations.
  • Non-Patent Document 1 describes EUTRAN regulations.
  • Non-Patent Document 1 3GPP TR25. 814
  • One aspect of the object of the present invention is to reduce the time required from the supplement of the synchronization channel at the handover destination to the reception of data with a short allowable delay time at the time of handover.
  • one aspect of the present invention is to facilitate transmission of data from a plurality of base stations at the same band position at the same frame position.
  • the wireless communication device transmits the first data by using a predetermined band including a subband for transmitting the synchronization channel with priority over the predetermined band
  • the second data Includes a transmission control unit that transmits by using the outside of the predetermined band with priority over the predetermined band, and the first data has a short delay time allowed for the second data.
  • a wireless communication device characterized by this is used.
  • a wireless communication control system comprising: a transmission control unit configured to control data transmitted to a terminal to have a higher rate of transmission in the first subband than in the second subband. Use the device.
  • FIG. 1 is a diagram (part 1) illustrating a concept of long-term radio resource advance reservation type transmission.
  • FIG. 2 is a diagram (part 2) illustrating the concept of long-term radio resource advance reservation type transmission.
  • FIG. 3 is a diagram showing a concept of a cell common MBMS data transmission method in downlink.
  • FIG. 4 is a diagram illustrating the concept of time-multiplexed transmission of a short CP subframe and a long CP subframe in the downlink.
  • FIG. 5 is a diagram showing the concept of downlink transmission scheduling for multicast data including voice packets and cell-specific MBMS data.
  • FIG. 6 is a diagram (part 1) illustrating an example of radio resource allocation to a synchronization channel.
  • FIG. 7 is a diagram (part 2) illustrating an example of radio resource allocation to a synchronization channel.
  • ⁇ 8 This is a diagram (part 1) explaining the problem due to handover during a voice call.
  • FIG. 10 A diagram showing a concept of scheduling for cell common MBMS data in the downlink.
  • FIG. 11 A diagram (part 1) illustrating a problem related to scheduling of voice packets and MBMS data.
  • FIG. 12 This is a diagram (part 2) illustrating the problem related to scheduling of voice packets and MBMS data.
  • FIG. 13 is a diagram (part 3) illustrating a problem related to scheduling of voice packets and MBMS data.
  • FIG. 14 illustrates the principle of the present invention (part 1).
  • FIG. 15 is a diagram (part 2) for explaining the principle of the present invention.
  • FIG. 16 is a diagram (part 3) for explaining the principle of the present invention.
  • FIG. 17 is a diagram (part 4) for explaining the principle of the present invention.
  • FIG. 18 is a diagram (part 1) for explaining the effect of the present invention.
  • FIG. 19 is a diagram (part 2) for explaining the effect of the present invention.
  • FIG. 20] is a diagram (part 3) for explaining the effect of the present invention.
  • FIG. 21 is a diagram (part 1) illustrating an arrangement example of voice packets.
  • FIG. 22 is a diagram (part 2) illustrating an arrangement example of voice packets.
  • FIG. 23 is a diagram (part 3) illustrating an example of arrangement of voice packets.
  • FIG. 24 is a diagram (part 4) illustrating an arrangement example of voice packets.
  • FIG. 25 is a diagram (part 5) illustrating an example of arrangement of voice packets.
  • FIG. 26 is a diagram (part 6) illustrating an example of arrangement of voice packets.
  • FIG. 27 is a diagram (part 7) illustrating an arrangement example of voice packets.
  • FIG. 28 is a diagram (part 8) illustrating an example of arrangement of voice packets.
  • FIG. 4 is a diagram illustrating an example of how voice packets are arranged when transmitted / received in ().
  • FIG. 30 is a diagram showing a block configuration example of a base station according to the embodiment of the present invention.
  • FIG. 31 is a diagram showing a block configuration example of an aGW according to the embodiment of the present invention.
  • FIG. 32 is a diagram showing a block configuration example of a (mobile) terminal according to the embodiment of the present invention.
  • FIGS. 14 to 17 are diagrams for explaining the principle of the present invention.
  • a voice packet (data whose allowable delay time is shorter than that of NRT, etc.) is the same subband as that used for synchronization channel transmission in each cell, or synchronization. Transmit on both adjacent subbands of the subband used for channel transmission. That is, in this example, a subband for transmitting a synchronization channel and an adjacent subband are set as predetermined bands.
  • FIG. 14 is a diagram for explaining the first principle of the present invention.
  • the synchronization channel is transmitted using a synchronization channel transmission subband near the center of the system band (transmission band).
  • transmission band the system band
  • the synchronization channel does not use all areas of the subframe in the subframe, radio resources are available in the subband of the subframe in which the synchronization channel is transmitted. Therefore, as a part for transmitting a voice packet (voice packet transmission part), a part of the subband in which the synchronization channel is transmitted and a radio resource in the subframe is empty is allocated.
  • the subbands that are the same as the subbands of the synchronization channel and the subbands adjacent thereto are not used.
  • a voice packet is transmitted using a band.
  • the sub-channel may be assigned to another channel that is compatible with the synchronization channel and not used for audio packet transmission.
  • a predetermined band is set up to adjacent subchannels.
  • the terminal simultaneously receives the width of this frequency band (reception frequency resetting (for example, local frequency change) is not required) ) Possible bandwidth or less.
  • the synchronization check is performed using two subbands in the system band.
  • voice packets are sent using these two subbands where the synchronization channel is transmitted.
  • voice packets are transmitted using two subbands of the synchronization channel and adjacent subbands.
  • the terminal may change its reception band when the synchronization channel is captured at the time of a hard node over. Since voice calls can be started without any problems, the time required for handover can be shortened, and the time for disconnecting voice calls can be shortened.
  • data (first data) having a short delay time allowed for NRT or the like such as RT such as voice is transmitted to a predetermined frequency band (a sub-channel including a band for transmitting a synchronization channel). It is also possible to allow force transmission that is transmitted outside the predetermined area. That is, the rate at which the first data (in this case, audio data) is transmitted within a predetermined frequency band is made larger than the rate at which it is transmitted outside the predetermined frequency band (for example, set to 2: 1). As a result, it is possible to increase the possibility that the time required until the first data can be received is shortened in the supplemental power of the synchronization channel.
  • a predetermined frequency band a sub-channel including a band for transmitting a synchronization channel.
  • this ratio is set to 1: 0.
  • this setting is preferable in terms of scheduling because the second data can be transmitted outside the predetermined frequency band independently of the transmission status of the first data.
  • FIG. 18 to FIG. 20 are diagrams for explaining the operation when multicast data having the same content is transmitted from a plurality of cells (radio base stations).
  • the system bandwidth in EUTRAN is the power to support multiple devices such as 20, 15, 10, 5, 2.5, 1.25 MHz, etc.
  • One thing common to these system bandwidths is the synchronization channel and broadcast channel Is transmitted at the center of the system transmission band.
  • the effect increases as the number of base stations transmitting the same MBMS data increases and the number (type) of cell-common MBMS data transmitted using the long CP subgram transmitted at the same timing increases. To do. Since all cells share the position to transmit the synchronization channel / broadcast channel, it is effective to transmit voice packets in the subband transmitting the synchronization channel, or both adjacent subbands.
  • the voice packet is shown as an example of data transmitted to the same terminal at the same subframe position, the same subband, and the same terminal for a plurality of subframes.
  • the voice packet is transmitted in the first subband and not transmitted in the second subband.
  • the rate of transmission in the first subband is the second subband. It is good also as raising with respect to the rate transmitted within a mode. Since the degree of freedom of channel assignment in the second subband is higher than the degree of freedom of channel assignment in the first subband, data can be received from multiple radio base stations at the same band position. It becomes easy to find the transmission area.
  • such transmission control is commonly performed in each radio base station of a plurality of radio base station groups that may transmit data at the same band position and at the same frame position.
  • base stations having different system bandwidths may be adjacent to each other, and the received signal bandwidth of the terminal may be narrower than the system bandwidth. In such a case, during handover between different base stations, it may be necessary to change the reception center frequency in the terminal in order to receive the synchronization channel transmitted in the downlink of the handover destination cell.
  • the voice call at the handover destination is resumed after synchronization with the base station of the handover destination cell is completed depending on the position of the subband for voice packet transmission at the handover destination. Therefore, the terminal needs to change the reception center frequency again.
  • the subband power for transmitting voice packets is set to the subband that transmits the synchronization channel to all cells or both adjacent subbands, it can be used during a voice call. Since there is no need to change the reception center frequency, It is possible to minimize the talk time (Figure 20). As shown in FIG. 20, in (1), the mobile terminal stops receiving voice packets from cell # 1 and starts handing over to neighboring cell # 2.
  • FIG. 21 shows an example of a voice packet.
  • the synchronization channel is transmitted at the center of the system transmission band. However, the synchronization channel is not necessarily transmitted in every subframe, and is inserted into a subframe and transmitted in a certain time period (eg, every 10 or 20 subframes). Is done.
  • voice packets are transmitted on a subband that is in the same location as the subband on which the synchronization channel is transmitted.
  • voice packets for one or more terminals are transmitted.
  • voice packets are transmitted within this subband, but non-voice data can also be transmitted within this subband.
  • Non-voice data includes normal NRT user data, broadcast channels, paging signals, and so on.
  • a long CP subframe is inserted to transmit cell common MBMS data, and a plurality of cell common MBMS data is inserted in this long CP subframe.
  • FIG. 23 shows an example in which a voice packet is transmitted using a subband adjacent to the subband of the synchronization channel.
  • the synchronization channel is transmitted at the center of the system transmission band. It is not always transmitted in every subframe, but is inserted into a subframe at a certain time period (eg every 10 or 20 subframes). .
  • a voice packet is transmitted on a subband that is in the same location as the subband to which the synchronization channel is transmitted and a subband that is in the same location as both adjacent subbands of the subband in which the synchronization channel is transmitted.
  • An audio bucket for one or more terminals is transmitted in one subband.
  • Non-voice data includes normal NRT user data, broadcast channels, paging signals, and so on.
  • FIG. 24 shows a state in which a long CP subframe is inserted to transmit cell-common MBMS data, and a plurality of cell-common MBMS data is inserted in the long CP subframe.
  • FIG. 25 shows an example of voice packet arrangement when two synchronization channels are arranged in the system band. In the subframe where the synchronization channel is transmitted, the synchronization channel is transmitted in two subbands within the system transmission band.
  • the synchronization channel is not necessarily transmitted in every subframe, but is transmitted in a subframe at a fixed time period (eg, every 10 or 20 subframes).
  • a voice packet is transmitted in a subband that is in the same location as the subband in which the synchronization channel is transmitted.
  • voice packets for one or more terminals are transmitted.
  • non-voice data can also be transmitted within this subband.
  • Non-voice data includes normal NRT user data, broadcast channels, paging signals, and so on.
  • FIG. 26 shows a state in which a long CP subframe is inserted to transmit cell common MBMS data, and a plurality of cell common MBMS data is inserted in the long CP subframe.
  • FIG. 27 and FIG. 28 are diagrams showing an example of how voice packets are arranged when uplink and downlink are alternately transmitted / received by time division duplex (TDD).
  • TDD time division duplex
  • uplink subframes and downlink subframes are sent alternately.
  • the synchronization channel is transmitted at regular intervals in the central part of the system band of the downlink short CP subframe.
  • voice packets are transmitted and received using the subband of the same frequency as the synchronization channel.
  • voice packets for one or more terminals are transmitted.
  • voice packets are transmitted within this subband, but non-voice data can also be transmitted within this subband.
  • Non-voice data includes normal NRT user data, broadcast channels, paging signals, and so on.
  • FIG. 28 shows a state in which a long CP subframe is inserted in order to transmit cell common MBMS data, and a plurality of cell common MBMS data is inserted in the long CP subframe.
  • FIG. 29 is a diagram illustrating an example of how voice packets are arranged when uplink and downlink are transmitted / received by frequency division duplex (FDD).
  • FDD frequency division duplex
  • the uplink subframe and the downlink subframe are transmitted using a system band at a frequency separated from each other by a duplex frequency.
  • the synchronization channel is transmitted at regular intervals in the center of the system band of the downlink short CP subframe.
  • FDD frequency division duplex
  • the location where the uplink voice packet is transmitted is the subband where the synchronization channel is transmitted in the downlink and the subband separated by the duplex frequency.
  • the location where the voice packet is transmitted on the uplink is the center of the uplink transmission system band.
  • a single or multiple terminal voice packets are transmitted in one subband. Transmission of voice packets is performed within this subband, but non-voice data can also be transmitted within this subband. Non-voice data includes normal NRT user data, broadcast channels, paging signals, and so on.
  • a long CP subframe is inserted in the downlink to transmit the cell common MBMS data, and a plurality of cell common MBMS data is inserted in the long CP subframe. Transmission is also possible.
  • FIG. 30 is a diagram showing a block configuration example of the base station according to the embodiment of the present invention.
  • the short CP subframe generation unit 12 and the long CP subframe generation unit 14 are configured so that data fits in the size of the channel coding unit (for example, turbo code unit), the interleaving unit, and the radio frame, respectively.
  • the rate matching unit is included.
  • the modulation unit 16 includes an IFFT circuit for generating an OFDM signal.
  • the data resending function unit such as HARQ (Hybrid Automatic Repeat reQuest) is included in the scheduler 11.
  • the radio resource management unit 10 is notified of the cell-wide MBMS data transmission advance notice for the aGW power, and the radio resource use unit 10 reports the radio resource usage status to the aGW.
  • the radio resource management unit 10 notifies the scheduler 11 how to allocate radio resources to the MBMS.
  • Cell common MBMS data radio resource allocation information, voice data, multicast data, and cell-specific MBMS data are input from the aGW to the scheduler 11 functioning as a transmission control unit.
  • Scheduler 11 is a long CP subframe transmission notice Signal, audio data, multicast data, and cell-specific MBMS data are input to the short CP subframe generator 12. Further, the scheduler 11 inputs the audio data cast data to the long CP subframe generation unit 14.
  • the scheduler 11 sends the radio resources allocated to the cell common MBMS data to the cell common MBMS data processing unit Z data buffer 13.
  • Cell common MBMS data is input to the cell common MBMS data processing unit / data buffer 13 from the aGW.
  • Cell common MBMS data is input from the cell common MBMS data processing unit Z data buffer 13 to the long CP subframe generation unit 14.
  • the long CP subframe generation unit 14 receives a pilot signal, a control signal, and the like.
  • the short CP subframe generation unit 12 receives a synchronization channel such as a pilot signal and a control signal.
  • the short CP subframe and the long CP subframe are input from the short CP subframe generation unit 12 and the long CP subframe generation unit 14 to the time multiplexing unit 15, respectively.
  • the time multiplexing unit 15 time-multiplexes the subframe according to the time multiplexing control signal from the scheduler 11 and sends the subframe to the transmission antenna via the modulation unit 16 and the radio unit 17.
  • the time division multiplexed data from 12 and 14 is input to the modulation unit 16.
  • data corresponding to each subchannel is input in order.
  • data corresponding to each subchannel corresponding to the left band of the synchronization channel transmission subband, data corresponding to the subchannel corresponding to the synchronization channel transmission subband (synchronization signal, audio) Packet) and the data power corresponding to each sub-channel corresponding to the right band of the synchronization channel transmission sub-band is input to the IFFT processing unit of the modulation unit 16 in the order of the data power, and the frequency domain signal is converted into a time domain signal, Given to part 17.
  • FIG. 31 is a block configuration diagram of an aGW according to the embodiment of the present invention.
  • the cell common MBMS data is stored in the cell common MBMS data buffer 20, and is sent to the base stations # 1 to #N of the cell common MBMS data according to an instruction from the cell common MBMS data transmission control unit 21.
  • Cell common MBMS data transmission control unit 21 sends cell common MBMS data radio resource allocation information and cell common MBMS data transmission notice to base stations # 1 to #N. Also, the radio resource usage report is notified from each of the base stations # 1 to #N to the cell MBMS data transmission control unit 21.
  • FIG. 32 is a block diagram of a (mobile) terminal according to the embodiment of the present invention.
  • Voice packets, multicast data, and control signals are coded by channel coding sections 25 to 27 and multiplexed by multiplexing section 28, respectively.
  • the multiplexed signal and the pilot signal are mapped to a physical channel in the physical channel generation unit 29 and sent to the transmission antenna via the modulation unit 30 and the radio unit 31.

Abstract

Un canal de synchronisation est placé dans une partie d'une bande de système pour chacune des sous trame constantes pour l'émission. Par ailleurs, une sous bande possédant la même fréquence que le canal de synchronisation est attribuée pour l'émission par paquets audio, qui est une ressource radio pour émettre un paquet audio. De cette façon, lors de la capture du canal de synchronisation pendant un transfert intercellulaire, le terminal peut utiliser la même bande reçue pour recevoir le paquet audio. Par conséquent, même si la communication téléphonique est interrompue à cause d'un transfert, elle peut être immédiatement reprise, ce qui permet d'atténuer le problème de la communication téléphonique pendant le transfert intercellulaire.
PCT/JP2006/319189 2006-09-27 2006-09-27 Dispositif de communication sans fil WO2008038352A1 (fr)

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PCT/JP2006/319189 WO2008038352A1 (fr) 2006-09-27 2006-09-27 Dispositif de communication sans fil

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JP2015088952A (ja) * 2013-10-31 2015-05-07 株式会社Ｎｔｔドコモ 無線基地局、ユーザ端末及び無線通信方法

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JPH08331093A (ja) * 1995-05-31 1996-12-13 Toshiba Corp 無線通信装置
JP2002511702A (ja) * 1998-04-10 2002-04-16 ウェーブコム 追加チャネルがダウンリンクに割り当てられた携帯無線電話信号と、それに対応する方法、システム、移動局及び基地局
WO2004021616A1 (fr) * 2002-08-28 2004-03-11 Fujitsu Limited Appareil de transmission/reception et procede de transmission/reception
WO2005020488A1 (fr) * 2003-08-20 2005-03-03 Matsushita Electric Industrial Co., Ltd. Appareil de radiocommunication et procede d'affectation de sous-porteuses
JP2006515141A (ja) * 2003-03-24 2006-05-18 モトローラ・インコーポレイテッド 通信システムの同一チャネル干渉を低減させる方法及び装置

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Publication number Priority date Publication date Assignee Title
JPH08331093A (ja) * 1995-05-31 1996-12-13 Toshiba Corp 無線通信装置
JP2002511702A (ja) * 1998-04-10 2002-04-16 ウェーブコム 追加チャネルがダウンリンクに割り当てられた携帯無線電話信号と、それに対応する方法、システム、移動局及び基地局
WO2004021616A1 (fr) * 2002-08-28 2004-03-11 Fujitsu Limited Appareil de transmission/reception et procede de transmission/reception
JP2006515141A (ja) * 2003-03-24 2006-05-18 モトローラ・インコーポレイテッド 通信システムの同一チャネル干渉を低減させる方法及び装置
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Publication number Priority date Publication date Assignee Title
JP2015088952A (ja) * 2013-10-31 2015-05-07 株式会社Ｎｔｔドコモ 無線基地局、ユーザ端末及び無線通信方法
WO2015064366A1 (fr) * 2013-10-31 2015-05-07 株式会社Ｎｔｔドコモ Station de base radio, terminal d'utilisateur, et procédé de radiocommunication

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