WO2008069093A1 - Système de communication, station de base, terminal et procédé de communication - Google Patents

Système de communication, station de base, terminal et procédé de communication Download PDF

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Publication number
WO2008069093A1
WO2008069093A1 PCT/JP2007/073062 JP2007073062W WO2008069093A1 WO 2008069093 A1 WO2008069093 A1 WO 2008069093A1 JP 2007073062 W JP2007073062 W JP 2007073062W WO 2008069093 A1 WO2008069093 A1 WO 2008069093A1
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WO
WIPO (PCT)
Prior art keywords
communication
type
service identifier
base station
service
Prior art date
Application number
PCT/JP2007/073062
Other languages
English (en)
Japanese (ja)
Inventor
Nobuaki Takamatsu
Hironobu Tanigawa
Yasuhiro Nakamura
Original Assignee
Kyocera Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006322543A external-priority patent/JP2008141245A/ja
Priority claimed from JP2006347319A external-priority patent/JP2008141709A/ja
Application filed by Kyocera Corporation filed Critical Kyocera Corporation
Publication of WO2008069093A1 publication Critical patent/WO2008069093A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to a communication system and a base station, a terminal, and a communication method used in the communication system.
  • QoS control of radio sections in mobile communication systems such as digital cellular phone systems and PHS systems is realized in the data link layer (MAC layer) in the OSI reference model.
  • QoS Quality of Service
  • MAC layer data link layer
  • QoS Quality of Service
  • the IP header is removed when downlink (downlink) data arrives at the MAC layer. Cannot be controlled using the TOS field.
  • next-generation mobile communication system when multiple services (also called multi-call) are introduced for one user, services with different service priorities may be mixed. It is done. For example, VoIP (Voice Over IP) (for example, the service with the highest service priority) and e-mail (for example, the service with the lowest service priority) that transmits and receives voice data converted into IP packets ) May be mixed.
  • VoIP Voice Over IP
  • e-mail for example, the service with the lowest service priority
  • Patent Document 1 discloses a method for managing a large number of independent simultaneous calls between a mobile communication network and a subscriber terminal.
  • Patent Document 1 Japanese Translation of Special Publication 2005-525934
  • the present invention has been made to solve the above problems, and in a multi-service in which one radio link is shared by a plurality of services, a transmission queue is assigned to each service, and one radio link is provided.
  • the purpose is to obtain a communication system, a base station, a terminal, and a communication method thereof.
  • a communication system is a communication system in which a base station and a terminal are connected by a single radio link to perform communication, and the single radio link is used.
  • communication control means for adding a type of communication different from the communication is provided (claim 1).
  • a transmission unit that transmits a service identifier that specifies the type, and a reception unit that receives the service identifier, the communication control unit includes the received service identifier
  • a transmission queue for storing communication data is assigned to each type corresponding to the above (Claim 2).
  • a transmission queue for storing communication data is assigned to each type of communication corresponding to the service identifier, and communication control corresponding to the type of communication can be performed.
  • the communication control means performs control so that the frequency of data transmission differs for each transmission queue according to the service identifier (claim 3).
  • the communication is performed according to the OFDMA scheme, and the communication control unit assigns a subchannel which is a communication channel in the OFDMA scheme according to the type (claim 5).
  • V multiple different types of communication can be performed.
  • the communication control means assigns the number of subchannels corresponding to the service identifier for each transmission queue (claim 6).
  • the transmission means transmits the service identifier through the subchannel (claim 7).
  • the base station is a base station that communicates by connecting to a terminal through a single radio link, in addition to the type of communication that is initially performed using the single radio link, Communication control means for adding a different type of communication from the communication, and reception means for receiving a service identifier for specifying the type.
  • the communication control means is provided for each type according to the service identifier.
  • a transmission queue for storing communication data is assigned to each of the transmission queues, and control is performed so that the frequency of data transmission differs for each transmission queue in accordance with the service identifier (claim 8).
  • the communication is performed by an OFDMA system, and the communication control unit assigns a communication subchannel in the OFDMA system according to the type (claim 9). Yes
  • a terminal according to the present invention is a terminal used in a communication system that adds a type of communication different from the communication performed in addition to the type of communication initially performed using a single radio link with the base station. And a transmission unit that transmits a service identifier that specifies the type of communication according to the type of communication, and the transmission unit performs transmission of the service identifier on a subchannel that is a communication channel in the OFDMA scheme.
  • Characteristic (claim 10).
  • a service identifier transmission is included in the subchannel and transmitted, so that it differs in addition to the communication that was initially performed using a single radio link. Types of communication can be added.
  • a communication method is a communication system in which a base station and a terminal are connected by a single radio link to perform communication, and is a type of communication that is initially performed using the single radio link.
  • a communication method for adding a communication of a type different from the communication, the step of transmitting a service identifier specifying the type according to the type, the step of receiving the service identifier, and the received is included (claim 11).
  • a transmission queue can be assigned for each service, and a plurality of service priorities can be assigned to flows in one unspring link.
  • FIG. 1 is an explanatory diagram showing an OFDMA frame configuration used in a communication method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 3 is a sequence diagram in the communication system according to the embodiment of the present invention.
  • FIG. 4 is a diagram showing a structure of a MAC frame in the communication system according to the embodiment of the present invention.
  • FIG. 5 is a table showing an example of weights assigned to service priorities corresponding to different types of communication applications in the communication system according to the embodiment of the present invention.
  • FIG. 1 shows, for example, the frame structure of OFDMA when there are four time slots (S1 to S4) used in the PHS system, the vertical axis is the frequency axis, and the horizontal axis is the time axis. .
  • both the downlink period and the uplink period are 2 with respect to the frequency axis.
  • the subchannel of the first frequency band is called the control subchannel and is used in the control channel (CCH). Note that the first above The frequency band may be either the highest frequency band or the lowest frequency band.
  • the control channel subchannel indicates which subchannel of each time slot is used in each frequency band.
  • Fig. 1 is an example of a PHS system, and the base stations that can be specified by the control subchannels C1 to C4 are four base stations.
  • the control channel is transmitted intermittently every 100 ms.
  • the remaining 27 frequency bands include a traffic subchannel T1 for transmitting and receiving data.
  • This traffic subchannel includes an anchor subchannel and an extra subchannel.
  • An anchor subchannel is used to notify each terminal of which subchannel is used and which terminal is used, and the ability to correctly exchange data by retransmission control between the base station and the terminal. This is a subchannel for use in negotiation.
  • An extra subchannel is a subchannel that transmits data that is actually used.
  • a plurality of extra subchannels can be assigned to one terminal. In this case, the greater the number of allocated sub-subchannels, the wider the band, so high-speed communication becomes possible.
  • FIG. 2 is a configuration diagram of a communication system according to the embodiment of the present invention.
  • the communication system is a communication system 1 in which a base station 2 and a terminal 3 are connected by a single radio link to perform communication. 2 is connected to network 4.
  • the base station 2 controls communication of the base station, communication control means 2-1 for performing a plurality of different types of communication using a single radio link, and transmits data and voice to the terminal connected to the antenna. Transmitting means 2-2 and receiving means 2-3 for receiving data and voice from the terminal.
  • the terminal 3 includes transmission means 2-2 connected to an antenna and transmitting data and voice to the base station, and reception means 2-3 receiving data and voice from the base station.
  • the communication system according to this embodiment will be described in detail with reference to FIG. 3 which shows an example of a communication procedure sequence between the terminal 2 and the base station 3.
  • the sequence in Fig. 3 is an example of a case where the terminal 2 sends a voice call and receives an E-mail during voice communication (call).
  • the transmission means 3-1 of the terminal 3 transmits a link channel (LCH) establishment request to the connected base station 2.
  • LCH link channel
  • the communication control means 2-1 of the base station 2 that has received the link channel (LCH) establishment request allocates an anchor subchannel (ASCH) based on the carrier sense, and the transmission means 2-2 The location of the anchor subchannel (ASCH) is notified to the terminal by link channel (LCH) allocation.
  • LCH link channel
  • a service flow addition request is transmitted to the base station 2.
  • the service flow addition request includes a service identifier for identifying the service flow to be communicated by the terminal 3 and the service priority requested by the communication application.
  • the requested service is transmitted to the base station as a message using the extra subchannel (ESCH).
  • ESCH extra subchannel
  • the communication control means 2-1 of the base station 2 stores the communication data corresponding to the type of service for the service flow requested by the terminal 3.
  • a queue (transmission queue 1) is assigned, and the data transmission frequency is controlled so as to satisfy the service priority required for voice communication that is the type of service concerned.
  • the transmission means 2-2 of the base station 2 transmits a service flow addition confirmation to the terminal, notifying that preparation for exchanging data is completed on the base station side.
  • the terminal 3 that has received the service flow addition confirmation by the receiving unit 3-2 transmits a radio bandwidth request to the base station side by the transmitting unit 3-1.
  • the communication control means 2-1 of the base station 2 that has received the wireless bandwidth request secures a wireless bandwidth for the service.
  • transmission means 2-2 Notifies the terminal of the position of the subchannel used for communication by MAP and starts voice communication (communication).
  • the frequency of data transmission is controlled so that the transmission queues of both the base station 2 and the terminal 3 satisfy the service priority requested corresponding to the voice communication as the service type.
  • the data receiving side identifies a communication application in which the arrived data is to be received by the service identifier included in the received data.
  • the communication control means 2-1 assigns the service priority assigned to the e-mail service, which is the type of the service, as the service priority assigned to the transmission queue.
  • a transmission queue (transmission queue 2) different from that notified in (4) is allocated, and the frequency of data transmission is controlled so that the service priority required for the e-mail service is satisfied.
  • the anchor subchannel changes the allocation of the V and extra subchannels for data transmission for each service according to the service priority.
  • the base station 2 and the terminal 3 are connected by a single radio link, and data assigned with different service identifiers are passed through the base station 2 and the terminal 3, and the single radio link is connected by a plurality of service flows. Multi-service is realized by sharing.
  • FIG. 4 is a diagram showing the structure of the MAC frame in the present embodiment.
  • the CD field for identifying control information and data in the MAC header part is extended to a 3-bit area (Bitl, Bit2, Bit3).
  • the value of the CD field (Bitl, Bit2, Bit3) force ⁇ , 0, 0) indicates that the content of the MAC payload is MAC control data. In other cases, that is, (0, 0) , 1) to (; 1, 1, 1 ), This value indicates the service identifier (SI to S7) used by the user.
  • FIG. 5 is a table showing an example of a correspondence relationship between communication identifiers different from service identifiers and weights assigned to service priorities.
  • priorities are assigned to the service priorities Priority 1 to Priority 5 in advance.
  • the service priority is determined according to the service identifier.
  • the band necessary for service S1 is reserved for data transmission of service S1. All that remains is allocated for data transmission of service S5.
  • the band reserved for service S1 and the band reserved for service S5 The ratio is the ratio of the weights assigned to each priority.
  • the ratio of the weights of S1 and S5 is 10: 2
  • the bandwidth allocation of S1 and S5 shares the reserved bandwidth at a ratio of 10: 2.

Landscapes

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

Abstract

Selon l'invention, dans un multi-service dans lequel une liaison radio est partagée par plusieurs services, une file d'attente de transmission est attribuée à chacun des services de façon qu'un flux dans une liaison radio possède plusieurs priorités de services. Un système de communication (1) qui exécute des communications en connectant une station de base (2) à un terminal (3) au moyen d'une seule liaison radio comprend un moyen de commande de communications (2-1) qui utilise la seule liaison radio pour ajouter un type différent de communications à celui des communications exécuté initialement de manière à exécuter plusieurs types différents de communications au moyen de la seule liaison radio.
PCT/JP2007/073062 2006-11-29 2007-11-29 Système de communication, station de base, terminal et procédé de communication WO2008069093A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006322543A JP2008141245A (ja) 2006-11-29 2006-11-29 通信システム、基地局、端末及び通信方法
JP2006-322543 2006-11-29
JP2006-347319 2006-12-25
JP2006347319A JP2008141709A (ja) 2006-12-25 2006-12-25 通信システム、基地局、端末及び通信方法

Publications (1)

Publication Number Publication Date
WO2008069093A1 true WO2008069093A1 (fr) 2008-06-12

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ID=39491992

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Application Number Title Priority Date Filing Date
PCT/JP2007/073062 WO2008069093A1 (fr) 2006-11-29 2007-11-29 Système de communication, station de base, terminal et procédé de communication

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224231A (ja) * 1999-02-02 2000-08-11 Hitachi Ltd 移動通信システム及びパケットデータ送信方法
JP2003229894A (ja) * 2002-01-31 2003-08-15 Ntt Docomo Inc 基地局、制御装置、通信システム及び通信方法
JP2006054860A (ja) * 2004-07-14 2006-02-23 Matsushita Electric Ind Co Ltd 通信端末装置及び無線通信方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224231A (ja) * 1999-02-02 2000-08-11 Hitachi Ltd 移動通信システム及びパケットデータ送信方法
JP2003229894A (ja) * 2002-01-31 2003-08-15 Ntt Docomo Inc 基地局、制御装置、通信システム及び通信方法
JP2006054860A (ja) * 2004-07-14 2006-02-23 Matsushita Electric Ind Co Ltd 通信端末装置及び無線通信方法

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