WO2008018126A1 - Système de communication sans fil - Google Patents

Système de communication sans fil Download PDF

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Publication number
WO2008018126A1
WO2008018126A1 PCT/JP2006/315729 JP2006315729W WO2008018126A1 WO 2008018126 A1 WO2008018126 A1 WO 2008018126A1 JP 2006315729 W JP2006315729 W JP 2006315729W WO 2008018126 A1 WO2008018126 A1 WO 2008018126A1
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WO
WIPO (PCT)
Prior art keywords
mobile station
control channel
control information
control
wireless communication
Prior art date
Application number
PCT/JP2006/315729
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English (en)
Japanese (ja)
Inventor
Koji Sakai
Syuuichi Murata
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 JP2008528678A priority Critical patent/JP4855469B2/ja
Priority to PCT/JP2006/315729 priority patent/WO2008018126A1/fr
Publication of WO2008018126A1 publication Critical patent/WO2008018126A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation

Definitions

  • the present invention relates to a wireless communication system, and more particularly to a wireless communication system that performs W-CDMA (Wideband-Code Division Multiple Access) wireless communication.
  • W-CDMA Wideband-Code Division Multiple Access
  • HSDPA High Speed Downlink Packet Access
  • W-CDMA Wideband Code Division Multiple Access
  • FIG. 10 is a diagram showing an outline of HSDP A.
  • Cell phones 111 to 113 and notebook computers 114 and 115 exist in the cell 100a of the base station 100.
  • the mobile phone 111 and the notebook computer 114 communicate with each other by the conventional W-CDMA system, and the mobile phones 112, 113 It is assumed that the notebook computer 115 communicates with the HSDPA method.
  • the transmission rate of packets transmitted from the base station 100 is uniform (up to 384 Kbps) wherever the mobile phone 111 and the notebook computer 114 are located in the cell 100a.
  • the current reception radio wave condition of each terminal is judged, the modulation scheme is switched, and the fastest modulation scheme is selected, so that the base station power can be maintained even within the same cell 100a.
  • the downlink transmission speed at which communication is possible is changed according to conditions such as the distance of the communication.
  • the mobile phone 112 and the laptop computer 115 receive data at a maximum of 14.4 Mbps. If the mobile phone 113 is at the end of the cell 100a and is away from the base station 100 and the reception conditions are bad, the mobile phone 113 will receive data at a speed lower than 14.4 Mbps.
  • HSDPA adaptive modulation and coding processing in which the downlink transmission rate is optimally controlled.
  • high-speed packet transmission as described above is possible by switching the modulation method according to the reception status on the terminal side. It is also possible to select which user has priority in sending information according to the reception status of radio waves on the terminal side.
  • a pilot signal having a known carrier frequency is transmitted by the base station, and the mobile station existing in the cell receives the pilot signal.
  • the mobile station measures the propagation environment in the current environment when the pilot signal is received, and notifies the base station of the propagation environment index.
  • the base station preferentially transmits traffic data to a mobile station having a good propagation environment.
  • FIG. 11 is a diagram showing a schematic flow from pilot signal transmission to CQI measurement and data transmission to the mobile station.
  • the base station transmits a pilot signal.
  • the mobile station receives the pilot signal, obtains CQI, and returns it to the base station.
  • the mobile station transmits CQI information on a radio channel called HS-DPCCH (High Speed Dedicated Physical Control CHannel) to the base station.
  • HS-DPCCH High Speed Dedicated Physical Control CHannel
  • the base station performs scheduling based on the transmitted CQI. Scheduling is simply a process of selecting a mobile station with a good reception state from a plurality of mobile stations (if the mobile station to be transmitted is determined, the data transmission amount, modulation method, etc. are also determined). Will also be selected).
  • the base station transmits control information including various parameters of the scheduling result to the mobile station selected as the communication target.
  • the base station transmits control information on a control channel called HS-SCCH (High Speed Shared Control CHannel).
  • HS-SCCH High Speed Shared Control CHannel
  • the mobile station sets its own transmission / reception function based on the received control information.
  • the base station transmits data to the corresponding mobile station using the communication service set by scheduling. This data is sent to the mobile station on a channel carrying user data called HS-PDSCH (High Speed Physical Downlink Shared CHannel).
  • HS-PDSCH High Speed Physical Downlink Shared CHannel
  • the mobile station Since the mobile station needs to set its own transmission / reception function based on the scheduling result after receiving the control information, the data is received after the mobile station is ready for the data reception state.
  • data is transmitted with a certain delay after transmission of control information. That is, a certain time interval (TTI: Transmission Time Intervals) is provided from HS-SCCH transmission to HS-PDSCH transmission as shown in the figure.
  • TTI Transmission Time Intervals
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-64751
  • HS-SCCH including scheduling results
  • a maximum of four codes are multiplexed, and multiple codes (one set) are simultaneously transmitted to the mobile station for the base station power. One is detected.
  • the base station power also transmits HS-SCCH to a mobile station
  • a plurality of HS-SCCH usage numbers and channelization codes for spreading the HS-SCCH are transmitted to the base station.
  • a plurality of HS-SCCH usage numbers and channelization codes for spreading the HS-SCCH are transmitted to the base station.
  • the base station assigns one user's control information to one code, spreads and multiplexes all the codes, and multiplexes multiple codes in the HS-SCCH set. Generate and transmit one mixed radio control signal.
  • the mobile station receives a radio control signal, performs despreading processing, and performs HS-SCC. Demodulate and decode all codes for one set of H, narrow down the most probable HS-S CCH codes for the local station to one, and control information for HS-PDSCH reception from that HS-SCCH. Perform extraction. If there is no reliable HS-SCCH code in the HS-SCCH set, the HS-SCCH set at that time is judged as “no code for own station”.
  • FIG. 12 is a diagram showing a conventional HS-SCCH, HS-PDSCH, and HS-DPCCH transmission sequence.
  • Base station power HS-SCCH is transmitted in the downlink direction to the mobile station (4-channel transmission in the figure).
  • the first slot of the HS-SCCH includes information for the mobile station to demodulate the HS-PDSCH (code multiplexing number, modulation scheme, etc.) as control information.
  • the second slot of HS-SCCH includes information (process number, retransmission Z new indicator, rate matching information, etc.) for the mobile station to decode HS-PDSCH as control information.
  • the HS-PDSCH After transmitting the HS-SCCH from the base station, the HS-PDSCH is transmitted to the mobile station with a delay of 2 slots. In this case, N (maximum 15) specified by HS-SCCH are transmitted.
  • the mobile station transmits HS-DPCCH in the uplink direction to the base station.
  • the HS-DPCCH is transmitted after 7.5 slots have elapsed after the reception of the HS-PDSCH.
  • CQI is inserted into the second slot of HS-DPCCH. Based on this CQI, the information scheduled at the base station is inserted into the next HS-SCCH.
  • FIG. 13 is a diagram showing a conventional HS-SCCH transmission format.
  • HS-SCCH uses four channels # 1 to # 4, and four codes C1-1 to C4—1 are set as one set, and channelization codes CC1 to CC4. Suppose you decide.
  • the base station controls one user for any one of the codes C1 1 to C4 1 Insert information, and for other codes, insert control information of another user in the same cell.
  • control information of mobile station UE (User Equipment) 1 is inserted into HS-SCCH # 1 code CI—1, and control of mobile station UE2 is inserted into code C2-1 of HS-SCCH # 2.
  • Information is inserted, control information of mobile station UE3 is inserted into code C3—1 of HS-SCCH # 3, control information of mobile station UE4 is inserted into code C4—1 of HS-SCCH # 4, and code C1 is inserted.
  • 1 to C4-1 are HS-SCCH sets.
  • the base station uses all channelization codes CC1 to CC4 to spread and transmit the HS-S CCH channel. That is, each of codes 1 1 to 4 1 is multiplied by channelization codes CC1 to CC4 ((CI—1) X (CC1), (C2-1) X (CC2), ⁇ ), Multiplex four multiplication results to generate and send one radio control signal.
  • the mobile station When the mobile station receives this radio control signal, it despreads the HS-SCCH set using all channelization codes C C1 to CC4. Then, it determines whether there is a code addressed to itself from the obtained multiple despread data, selects the most likely H S-SCCH code, and selects from the selected HS-SCCH code. Extract control information addressed to your station. Thus, in the past, the most probable HS-SC CH code was selected from multiple HS-SCCH codes.
  • FIG. 14 is a diagram showing a transmission format of HS-SCCH including dummy data.
  • 4 codes are specified for one set of HS-SCCH, and at this time, if only the mobile station U E1 is to be communicated, the base station, for example, transmits the code of the mobile station UE 1 to the code C11. Control information is inserted, dummy data is inserted into other codes 2-1 to 41, and codes C11 to C4-1 are transmitted as HS-SCCH sets.
  • time slot t2 four codes are specified for one set of HS-SCCH.
  • the base station inserts the control information of the mobile station UE2 in the code C2-2, and in the other codes C1-2, C3-2, C4-2 Inserts dummy data and transmits codes CI-2 to C4-2 as an HS-SCCH set (same control after times t3).
  • the mobile station in the situation where three dummy data codes are included in addition to one HS-SCCH code addressed to the own station, the mobile station includes control information addressed to the own station within the same code.
  • the HS-SCCH for 4 codes is always received, and despreading is performed, and the judgment process addressed to the local station is performed from the dummy data.
  • the mobile station generates unnecessary power consumption because it performs unnecessary determination processing.
  • the present invention has been made in view of these points, and an object of the present invention is to provide a wireless communication system that improves the efficiency of wireless transmission and reduces the power consumption of a mobile station.
  • a control information insertion unit that inserts control information into a control channel, and the control channel is multiplexed by spreading processing.
  • a base station comprising a radio processing signal to generate and transmit, a despreading processing unit that receives the radio control signal and performs despreading processing to generate despreading data
  • a mobile station comprising: a decoding processing unit that synthesizes and decodes the despread data; and the control information insertion unit specifies a specific code for all of the same codes of the plurality of control channels.
  • a wireless communication system is provided, wherein the control information of the mobile station is inserted.
  • control information insertion unit inserts control information into the control channel.
  • the spreading processing unit multiplexes the control channels by spreading processing, and generates and transmits a radio control signal.
  • the despreading processing unit receives the radio control signal and performs despreading processing to generate despread data.
  • the decoding processing unit synthesizes the despread data and decodes it.
  • the control information insertion unit inserts control information of a specific mobile station into all of the same codes of a plurality of control channels.
  • the radio communication system of the present invention inserts control information of a specific mobile station into all the same codes of the control channel, performs control channel spreading processing, generates a radio control signal, and transmits it.
  • the mobile station receives a radio control signal, performs despreading processing, generates despread data, and acquires a control channel.
  • dummy data is not included in the same code, but only control information addressed to the own station is included, and the mobile station does not need to perform processing for determining whether or not the power is addressed to the own station. It becomes possible to reduce power consumption.
  • FIG. 1 is a principle diagram of a wireless communication system.
  • FIG. 2 is a diagram showing a transmission format of HS-SCCH.
  • FIG. 3 is a configuration block diagram of a control channel receiver of a mobile station.
  • FIG. 4 is a configuration block diagram of a control channel receiving unit.
  • FIG. 5 is a principle diagram showing a radio communication system according to a second embodiment.
  • FIG. 6 is a diagram for explaining an insertion pattern of control information.
  • FIG. 7 is a diagram showing a transmission format of HS-SCCH.
  • FIG. 8 is a configuration block diagram of a control channel receiver of a mobile station.
  • FIG. 9 is a principle view showing a wireless communication system according to a third embodiment.
  • FIG. 10 is a diagram showing an outline of HSDPA.
  • FIG. 11 is a diagram showing a schematic flow from pilot signal transmission to CQI measurement and data transmission to the mobile station.
  • FIG. 12 is a diagram showing a conventional HS-SCCH, HS-PDSCH, and HS-DPCCH transmission sequence.
  • FIG. 13 is a diagram illustrating a conventional HS-SCCH transmission format.
  • FIG. 14 is a diagram showing an HS-SCCH transmission format including dummy data.
  • FIG. 1 shows a wireless communication system FIG.
  • the wireless communication system 11 is a system that includes mobile stations 10-1 to 10-n and a base station 20, and performs wireless communication such as W-CDMA.
  • the base station 20 includes a control channel transmission unit 2 Oa including a control information insertion unit 21 and a spreading processing unit 22.
  • the control information insertion unit 21 transmits normal control data to the mobile station 10-1 ⁇ : LO-n using the control channel for setting the communication service to the mobile station 10-1 ⁇ : LO-n.
  • control information of a specific mobile station (same mobile station) is inserted into all of the same codes of n control channels.
  • the spreading processing unit 22 performs spreading processing of n control channels and multiplexes, generates one radio control signal for the n control channels, and transmits it in the air.
  • Mobile stations 10-l to 10-n (collectively, mobile station 10) have a control channel receiving unit 10a including a despreading processing unit 11 and a decoding processing unit 12.
  • the despreading processing unit 11 receives the radio control signal and performs despreading processing to generate n despread data.
  • the decryption processing unit 12 combines the despread data and decrypts it.
  • FIG. 2 is a diagram showing a transmission format of HS-SCCH.
  • the control information insertion unit 21 of the base station 20 inserts the control information of the same mobile station into a plurality of codes of the same code (the same code means the code of the same time zone) in the HS-SCCH set. .
  • control information of the mobile station 10-1 is inserted into all the codes C1—1 to C4—1 of HS-SCCH # 1 to # 4, and the code Cl—2 of HS-SCCH # 1 to # 4 ⁇ C4— Insert control information of mobile station 10-2 into all 2.
  • control information of the same mobile station is inserted into a plurality of codes having the same code.
  • control information insertion unit 21 inserts control information encrypted with the mobile station identifier code corresponding to each of the mobile stations 10-1 to: L0-n.
  • the control information insertion unit 21 is inserted into the codes C1 1 to C4-1 addressed to the mobile station 10-1.
  • Control information encrypted with UE—ID 1 and control information inserted into codes C12 to C4 2 addressed to mobile station 10—2 is assigned to UE—ID2. (The control information is encrypted and inserted into each code). The same applies thereafter.
  • the spreading processing unit 22 in the base station 20 has four HS-SCCHs with control information inserted therein.
  • FIG. 3 is a configuration block diagram of the control channel receiving unit 10a of the mobile station 10.
  • the despreading processing unit 11 is composed of despreading units 11a to: L id, and the decoding processing unit 12 includes a combining unit 12a and a decoding unit 12b.
  • despreading section 11a despreads the radio control signal using channelization code CC1.
  • the despreading section l ib ⁇ : L id despreads the radio control signal using the channelization codes CC2 to CC4.
  • the synthesizer 12a synthesizes the despread data output from the despreader 11a: L id.
  • the decoding key unit 12b decrypts the composite data using the identifier of the local station to cancel the confidentiality, and acquires control information addressed to the local station. For example, in the case of the decoding key unit 12b in the mobile station 10-1, decoding is performed using the UE-ID 1 that is an identifier code.
  • the mobile station does not need to determine whether it is destined for the mobile station, thereby reducing power consumption. It becomes possible to plan.
  • the control information addressed to the local station included in the 4-channel HS-SCCH is synthesized and decoded, the conventional HS-SCCH addressed to the local channel and 3-channel dummy data are multiplexed. Compared with decoding, more reliable HS-SCCH can be detected and error tolerance can be improved.
  • FIG. 4 is a block diagram of the configuration of the control channel receiver.
  • the despreading processing unit 11 includes despreading units lla to lId
  • the decoding key processing unit 12-1 includes a reliability determination unit 12c, a combining unit 12d, and a decoding key unit 12e.
  • the despreading unit 11a despreads the radio control signal using the channelization code CC1. Scatter.
  • the despreading section l ib ⁇ : L id despreads the radio control signal using the channelization codes CC2 to CC4.
  • the reliability determination unit 12c determines the reliability of the despread data, and extracts and outputs only the despread data with high reliability.
  • the combining unit 12d combines only despread data with high reliability.
  • the decryption key unit 12e decrypts the composite data using the identifier of the local station, and acquires control information addressed to the local station.
  • FIG. 5 is a principle diagram showing a radio communication system according to the second embodiment.
  • the radio communication system 1-2 includes mobile stations 3 0-1 to 30-n and a base station 40.
  • the base station 40 includes a control channel transmission unit 40a including a control information insertion unit 41 and a spreading processing unit 42.
  • the control information insertion unit 41 transmits normal control data to the mobile stations 30-l to 30-n using the control channel for setting the communication service to the mobile stations 30-l to 30-n. In this case, the control information of one mobile station is inserted into one of the same codes of the n control channels. Other codes that do not insert control information are idle (no information is sent).
  • the spreading processing unit 42 performs spreading processing of n control channels, generates n radio control signals for the n control channels, and transmits them in the air.
  • Mobile stations 30-1 to 30 -n have a control channel receiving unit 30 a including a despreading processing unit 31 and a decoding processing unit 32.
  • the despreading processing unit 31 performs despreading processing only on the radio control signal including the control information addressed to itself and generates despread data.
  • the decryption processing unit 32 decrypts the despread data.
  • FIG. 6 is a diagram for explaining an insertion pattern of control information.
  • the code of the i (1 ⁇ i ⁇ n) -th control channel in the time slot tk (l ⁇ k) is the code Cik
  • the control information to be transmitted to the i-th mobile station is the control information Di.
  • the first mobile station is mobile station 30-1, the second mobile station is mobile station 30-2, and the nth mobile station is mobile station 30-n.
  • the control information insertion unit 41 Control information D1 addressed to mobile station 30-1 is inserted into code CI 1 of time slot tl of control channel # 1, and mobile station 3 0 is supplied to code C22 of time slot t2 of control channel # 2. — Control information D2 addressed to 2 is inserted, and control information Dn addressed to mobile station 30—n is inserted into code Cnk of time slot tk of control channel #n.
  • the spreading processing unit 42 performs spreading processing of n control channels # 1 to #n, generates n radio control signals corresponding to each of the n control channels, and enters the air. Send.
  • the control channel receiver 30a in the i-th mobile station 30-i performs reception processing of only the radio control signal output in the time slot of the time slot tk in which the code Cik exists.
  • the control channel receiver 30a in the mobile station 30-1 receives a radio control signal (control channel # 1) including control information addressed to itself in the time slot tl, and performs despreading and decoding. To obtain control information addressed to the local station.
  • the control channel receiver 30a in the mobile station 30-2 receives the radio control signal (control channel # 2) including the control information addressed to itself in the time slot t2, and performs despreading and decoding. To obtain control information addressed to the local station.
  • the regularity of the control information insertion pattern described above is determined in advance by negotiating at the time of call connection between the base station and the mobile station. Note that the regularity shown in FIG. 6 is an example, and the control information of one mobile station is inserted into one of the same codes of n control channels, and the control information is not inserted. If the code is idle, it may have other regularities.
  • FIG. 7 shows the HS-SCCH transmission format.
  • the control information insertion unit 41 of the base station 40 inserts the control information of one mobile station into one of the four same codes of HS-SCCH # 1 to # 4 based on the insertion pattern described above in FIG. Other codes that did not insert control information are idle.
  • control information of mobile station 30-1 is inserted into code C11 of HS-SCCH # 1, and the other codes in the same time slot as code C11 are idle, and the code of HS-SCCH # 2 Insert control information for mobile station 30-2 into C22 and add other codes in the same time slot as code C22 Is an idol! ⁇ -3 "0"[# 3 Code information 33 is entered into mobile station 30-3 control information, other codes in the same time slot as code C33 are idle, and HS-SCCH # 4 code C The control information of mobile station 30-4 is inserted into 44, and the other code in the same time slot as code C44 is idle.
  • control information insertion unit 41 inserts control information encrypted with the mobile station identifier code corresponding to each of the mobile stations 30-1 to 30-n.
  • the control information insertion unit 41 sets the control information inserted in the code C11 addressed to the mobile station 30-1 to the UE. — Encrypt with ID1 and encrypt the control information inserted into code C22 addressed to mobile station 3 0-2 with UE-ID2. The same applies thereafter.
  • the spreading processing unit 42 in the base station 40 has four HS-SCCHs with control information inserted therein.
  • HS-SCCH # 1 is spread with channelization code CC1 for # 1 to # 4
  • HS-SCCH # 2 is spread with channelization code CC2
  • HS-S CCH # 3 is spread with channelization code CC3
  • HS-SCCH # 4 is spread with channelization code CC4 to generate and transmit four radio control signals.
  • FIG. 8 is a configuration block diagram of the control channel receiving unit 30a of the mobile station 30.
  • mobile station 30-1 performs despreading of the HS-SCCH received in time slot tl
  • mobile station 30-2 performs despreading of the HS-SCCH received in time slot t2.
  • Decoding processor 32 decodes the despread data using its own station identifier to obtain control information addressed to itself.
  • one user's control information is inserted into one code in the HS-SCCH set, and the mobile station 30 is addressed to the own station.
  • the HS-SCCH is received in the time slot that contains the control information.
  • the mobile station only needs to receive one channel of HS-SCCH, which can reduce power consumption. become.
  • the third embodiment is a combination of the first and second embodiments. Based on the CQI value, the operation of the first embodiment and the operation of the second embodiment Is to switch.
  • FIG. 9 is a principle diagram showing a wireless communication system according to the third embodiment.
  • the wireless communication system 13 includes mobile stations 50-1 to 50-n and a base station 60.
  • the base station 60 includes a pilot signal transmission unit 61, a reception state determination unit 62, and a control channel transmission unit 63.
  • Pilot signal transmission unit 61 transmits a pilot signal.
  • the reception status determination unit 62 receives a propagation environment index (CQI), which is an index indicating the radio wave reception environment of the mobile stations 50-1 to 50-n, and determines the mobile station 50-1 to 50 from the magnitude of the CQI value. 50—Judge the reception status of n.
  • CQI propagation environment index
  • the control channel transmission unit 63 uses the control channel for setting the communication service to the mobile stations 50-1 to 50-n, and sends normal control data to the mobile stations 50-1 to 50-n.
  • a specific mobile station (the same mobile station) is assigned to all the same codes of the n control channels as the first transmission control.
  • Control information is inserted, n control channels are spread and multiplexed, and one first radio control signal is generated and transmitted to the n control channels (that is, the first control signal is transmitted). If the reception state is bad, the base station 60 selects the operation of the first embodiment and uses the control information insertion pattern shown in FIG.
  • the control channel transmission unit 63 sets 1 as one of the same codes of n control channels as the second transmission control.
  • the control information of one mobile station is inserted, and the other codes that do not insert the control information are idle, and the n control channels are spread, and the n second codes for each of the n control channels are performed.
  • Generate and transmit a radio control signal that is, if the reception state is good
  • the base station 60 selects the operation of the second embodiment and uses the control information insertion pattern shown in FIG. ).
  • the mobile station 50 includes a CQI transmission unit 51 and a control channel reception unit 52.
  • the CQI transmission unit 51 receives the pilot signal, measures its own radio wave reception environment, and transmits the CQI corresponding to the measurement result to the base station 60.
  • the control channel receiver 52 receives the first radio control. The control signal or the second radio control signal is received, and despread processing is performed for decoding.
  • control is switched according to the propagation environment.
  • the first and second transmission controls correspond to the above-described first and second embodiments, respectively, and thus the detailed operation is omitted).
  • first transmission control first embodiment
  • second transmission control second In this embodiment, since one control information is inserted into the same code, it is effective in a situation where the propagation environment is relatively good. If the CQI value is low, the first transmission control and CQI value are If it is higher, switch the control to perform the second transmission control.
  • the reception state determination unit 62 determines whether the reception state is good or bad from the CQI, the threshold value that has been bullied is compared with the CQI value, If the CQI value is small, it is judged that the reception condition is bad. If the CQI value is larger than the threshold value, it is judged that the reception condition is good. Value will be higher).
  • Control channel transmitter Control information insertion unit Spreading processing unit

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Abstract

L'invention apporte une amélioration de l'efficacité de la transmission sans fil et réduit la consommation d'énergie des stations mobiles. Lors de la transmission à des stations mobiles (10-1 à 10-n) utilisant des canaux de commande pour établir les services de communication pour les stations mobiles (10-1 à 10-n), un élément d'insertion d'information de commande (21) insère l'information de commande de la même station mobile dans tous les codes des mêmes périodes des n canaux de commande. Un élément d'étalement (22) étale puis multiplexe les n canaux de commande et transmet un signal unique de commande sans fil. Un élément de désétalement (11) reçoit et désétale le signal de commande sans fil pour générer les n données désétalées. Un élément de décodage (12) combine les données désétalées pour le décodage.
PCT/JP2006/315729 2006-08-09 2006-08-09 Système de communication sans fil WO2008018126A1 (fr)

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JP2008528678A JP4855469B2 (ja) 2006-08-09 2006-08-09 無線通信システム、基地局および移動局
PCT/JP2006/315729 WO2008018126A1 (fr) 2006-08-09 2006-08-09 Système de communication sans fil

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Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2003318781A (ja) * 2002-04-05 2003-11-07 Lucent Technol Inc 無線通信システムにおいて複数の共有制御チャネルを介して送信するために、合成シグナリングメッセージ部分（５００，７００）を生成する方法
WO2003096731A1 (fr) * 2002-05-10 2003-11-20 Mitsubishi Denki Kabushiki Kaisha Systeme de communication mobile, station de base et station mobile
JP2004289234A (ja) * 2003-03-19 2004-10-14 Mitsubishi Electric Corp 無線通信システム、移動局、基地局および基地局制御装置

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* Cited by examiner, † Cited by third party
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