WO2003103329A1 - 無線通信装置および使用帯域決定方法 - Google Patents
無線通信装置および使用帯域決定方法 Download PDFInfo
- Publication number
- WO2003103329A1 WO2003103329A1 PCT/JP2003/006631 JP0306631W WO03103329A1 WO 2003103329 A1 WO2003103329 A1 WO 2003103329A1 JP 0306631 W JP0306631 W JP 0306631W WO 03103329 A1 WO03103329 A1 WO 03103329A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wireless communication
- band
- bandwidth
- wireless
- data
- Prior art date
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- 238000004891 communication Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007562 laser obscuration time method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
-
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/11—Identifying congestion
-
- 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
- H04L47/19—Flow control; Congestion control at layers above the network layer
- H04L47/193—Flow control; Congestion control at layers above the network layer at the transport layer, e.g. TCP related
-
- 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
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2416—Real-time traffic
-
- 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
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
- H04L47/2433—Allocation of priorities to traffic types
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- 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
- H04L47/27—Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/801—Real time traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/822—Collecting or measuring resource availability data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/824—Applicable to portable or mobile terminals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/83—Admission control; Resource allocation based on usage prediction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
Definitions
- the present invention relates to a wireless communication device and a method of determining a used band, and more particularly, to a wireless communication device and a method of determining a used band used in a wireless communication system in which a TCP Transmission Control Protocol (UDP) flow and a UDP (User Datagram Protocol) flow are mixed.
- UDP Transmission Control Protocol
- UDP User Datagram Protocol
- Diff Server V Differentiated Services
- CoS Class of Service
- Japanese Patent Laid-Open As a technique for introducing a communication method taking the above QoS into consideration into an IP network having a wireless link that has a narrower band than a wired network and has a high data error rate, Japanese Patent Laid-Open — There is one disclosed in Japanese Patent Publication No. 295276.
- a traffic amount for each data flow a traffic amount for each data flow, communication quality information of a wireless section provided from a wireless base station device, and a retransmission provided from a local exchange. And wireless information to change the wireless bandwidth to guarantee data flow QoS Is used.
- FIG. 1 is a diagram showing a specific example of the above problem in a wireless communication system in which a TCP flow and a UDP flow coexist.
- the wireless bandwidth used is constant at W, if the bandwidth used for the TCP flow indicated by the horizontal line in the figure fluctuates due to flow control on the transmitting side, the bandwidth of the UDP flow shown by the vertical line in the figure is used Will be used. That is, there is a problem that the bandwidth of the UDP flow, which is the real-time application data, is not secured, and the real-time application data is delayed or a packet is discarded. In other words, the QoS of the UDP flow is not guaranteed. Disclosure of the invention
- An object of the present invention is to guarantee the QoS of real-time application data in a wireless communication system using a fixed wireless band without changing the configurations of existing base station devices and IP networks. .
- the subject of the present invention is to guarantee the bandwidth of a UDP flow which is a real-time application by limiting the bandwidth of a TCP flow when a UDP flow and a TCP flow are simultaneously transmitted in a certain wireless band. .
- a wireless communication apparatus includes: an obtaining unit configured to obtain a required band for transmitting constant rate data transmitted at a constant data rate; Band that can be used to transmit fluctuating rate data that can be transmitted at fluctuating data rates based on And an estimating means for estimating the area.
- a method of determining a bandwidth to be used includes a step of acquiring a required bandwidth for transmitting constant rate data transmitted at a constant data rate, and using the acquired required bandwidth and radio communication. Estimating a band that can be used for transmitting variable rate data that can be transmitted at a variable data rate, based on the predetermined wireless band to be obtained.
- FIG. 1 is a diagram showing an example of using a conventional wireless band
- FIG. 2 is a diagram showing an example of a configuration of an IP network and a wireless communication system according to Embodiment 1 of the present invention.
- FIG. 3 is a block diagram illustrating a configuration of a wireless communication terminal device according to Embodiment 1
- FIG. 4 is a diagram illustrating an example of a data field of a TCP segment according to Embodiment 1
- FIG. 5 is a diagram illustrating an example of use of a wireless band according to Embodiment 1
- FIG. 6 is a block diagram illustrating a configuration of a wireless communication terminal device according to Embodiment 2 of the present invention.
- FIG. 2 is a diagram illustrating an example of an IP network and a wireless communication system.
- a wireless communication terminal device 10 and a base station device 20 communicate real-time application data, which is a UDP flow, and non-real-time application data, which is a TCP flow, by sharing a predetermined wireless band.
- the base station device 20 communicates with the fixed terminal 40 or the server 50 via the IP network 30.
- FIG. 3 is a block diagram showing a configuration of the wireless communication terminal device 10.
- the wireless communication terminal device 10 shown in the figure includes a non-real-time application 100, a TCP control unit 110, a real-time application 120, a UDP control unit 130, an IP control unit 140, a retransmission control unit 150, a wireless transmission / reception unit 160, a wireless resource It comprises a control unit 170, a band estimation unit 180, and an awnd (Advertised iNDow) estimation unit 190.
- the non-real-time application 100 provides a non-real-time application service that can be transmitted at a fluctuating data rate such as FTP (File Transfer Protocol) or WWW (World Wide Web) browsing.
- the TCP control unit 110 adds a TCP header such as a source port number and a sequence number to the non-real-time application data to form a TCP segment.
- the real-time application 120 provides a real-time application service that requires a constant data rate, for example, is delay-sensitive such as audio and video.
- the UDP control unit 130 adds a port number to the real-time application data to form a UDP segment.
- the IP control unit 140 generates an IP packet by adding an IP header such as a source address and a destination address to the TCP segment and the UDP segment.
- the retransmission control unit 150 divides the IP bucket into a predetermined size and performs retransmission control on a radio link.
- Radio transmitting / receiving section 160 performs predetermined radio processing such as encoding and modulation on a packet obtained by being divided into a predetermined size, and transmits the packet via an antenna.
- the wireless resource control unit 170 performs negotiation with the base station device 20 to determine an available wireless band.
- the band estimating unit 180 estimates the usable band of the non-real-time application from the usable wireless band and the required band of the real-time application.
- awn d estimator 1 90 is non real-time
- the maximum a wnd indicating the maximum amount of buckets that can be received by the wireless communication terminal device 10 is estimated from the available bandwidth of the location.
- the wireless communication terminal apparatus 10 shifts from the idle mode to the communication mode, negotiation is performed by the wireless resource control unit 170 with the base station apparatus 20 as the communication partner, The usable wireless band is determined. The determined wireless band is notified to band estimation section 180. At the same time, the required bandwidth required for transmitting the real-time application data is notified to the bandwidth estimation unit 180 by the real-time application 120.
- the required bandwidth of the real-time application data is subtracted from the available wireless bandwidth by the bandwidth estimation unit 180, so that the available bandwidth of the non-real-time application data is calculated.
- the calculated usable band is notified to awnd estimating section 190.
- awnd estimating section 190 estimates the maximum awnd of TCP based on the usable band allowed for the non-real-time application data, and outputs it to TCP control section 110.
- the maximum a wnd estimated here can secure the band used by the UDP flow transmitting the real-time application data in the wireless band between the wireless communication terminal device 10 and the base station device 20.
- the window size can secure the band used by the UDP flow transmitting the real-time application data in the wireless band between the wireless communication terminal device 10 and the base station device 20.
- the window size actually used is subtracted from the maximum a wnd by the control unit 110, and the receivable a wnd is calculated. Further, the TCP controller 110 generates a TCP segment having, for example, a data field shown in FIG. 4 from the non-real-time application data (TCP data) generated by the non-real-time application 100. At this time, receivable a wnd is recorded in the window field of the TCP segment.
- the TCP segment is output to the IP control unit 140, and an IP bucket is generated by adding an IP header such as a source address and a destination address.
- the IP bucket is divided into a predetermined size by retransmission control section 150, subjected to radio processing such as encoding and modulation by radio transmission / reception section 160, and transmitted through an antenna.
- the transmitted packet is received by the base station device 20 and received by the fixed terminal 40 or the server 50 from the base station device 20 via the IP network 30.
- the fixed terminal 40 or the server 50 transmits data to the wireless communication terminal device 10
- the receivable a wnd included in the TCP header of the received packet and the transmittable window size of the own device are determined. Compare with cwnd (Congestion WiNDo) shown and send the next TCP segment with the smaller window size.
- the fixed terminal 40 or the server 50 transmits the TCP segment up to the receivable awn d window size. Since the calculation is performed so as to secure the required bandwidth of certain real-time application data, when the TCP flow is transmitted from the base station device 20 to the wireless communication terminal device 10, it is not possible to use up to the bandwidth used by the UDP flow. Absent.
- the TCP flow indicated by the horizontal line in the figure is transmitted.
- the maximum bandwidth used is WT, and the bandwidth used to transmit the UDP flow indicated by the vertical line in the figure can always be kept at WU.
- the transmitted TCP segment is transmitted to the wireless communication terminal device 10 via the IP network 30 and the base station device 20, the bucket is received by the radio transmission / reception unit 160 via the antenna, and demodulation and decoding are performed.
- Predetermined wireless processing is performed, retransmission control is performed by retransmission control section 150, and an IP bucket is assembled from a received bucket.
- the IP bucket passes through the IP control unit 140, and the non-real-time application data is output to the non-real-time application 100 via the TCP control unit 110.
- the real-time application data is output to the real-time application 120 via the UDP controller 130 and processed.
- the wireless communication terminal apparatus reduces the required bandwidth of the real-time application data from the wireless bandwidth used in the wireless communication, thereby enabling the non-real-time application data to be transmitted.
- Estimates the available bandwidth calculates the window size awnd that can be received by the own device based on the estimated available bandwidth, and uses the calculated awnd as a fixed terminal connected to the IP network that is the source of the data
- Fixed terminals and servers transmit a sufficient amount of non-real-time application data while maintaining the bandwidth of real-time application data, and in existing wireless communication systems that use a fixed wireless band, Modify the configuration of base station equipment and IP network And no, it is possible to guarantee the Q o S of the RealTime application data.
- Embodiment 2 of the present invention The configurations of the IP network and the wireless communication system according to Embodiment 2 of the present invention are the same as those in FIG. 2, and description thereof will be omitted.
- base station apparatus 20 is transmitting a TCP segment in which receivable a w nd is recorded.
- FIG. 6 is a block diagram showing a configuration of the wireless communication terminal device 10.
- the same parts as those of the wireless communication terminal device shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.
- the c w nd estimating unit 200 estimates the maximum c w nd indicating the maximum amount of buckets that can be transmitted by the wireless communication terminal device 10 from the usable band of the non-real-time application.
- the wireless communication terminal device 10 changes from the idle mode to the communication mode.
- the wireless resource control unit 170 performs negotiation with the base station device 20 as the communication partner, and determines an available wireless band. The determined wireless band is notified to band estimation section 180.
- the real-time application 120 notifies the bandwidth estimating unit 180 of the required bandwidth required for transmitting the real-time application data.
- the required bandwidth of the real-time application data is subtracted from the available wireless bandwidth by the bandwidth estimation unit 180, so that the available bandwidth of the non-real-time application data is calculated.
- the calculated usable band is reported to c wnd estimating section 200.
- the maximum c wnd estimated here can secure a used band of a UDP flow for transmitting real-time application data in a wireless band between the wireless communication terminal device 10 and the base station device 20.
- the window size is the required bandwidth of the real-time application data is subtracted from the available wireless bandwidth by the bandwidth estimation unit 180, so that the available bandwidth of the non-real-time application data is calculated.
- the calculated usable band is reported to c wnd estimating section 200.
- £: by 1 101 estimator 200 based on the available band range allowed for
- the window size actually used is subtracted from the maximum c wnd by the coping control unit 110, and the transmittable c wnd is calculated.
- the TCP segment transmitted from the base station device 20 is processed by the control unit 110 to obtain the receivable awnd of the base station device 20. Then, the TCP control unit 110 compares the receivable awnd with the transmittable cwnd, and transmits the next TCP segment with the smaller window size.
- the wireless communication terminal device 10 transmits TCP segments up to the window size of the receivable a wn d of the base station device 20, but the receivable a wn Since d is smaller than the transmittable c wn d calculated to secure the required bandwidth for real-time application data that is a UDP flow, the bandwidth used for the UDP flow cannot be used. Also, if the transmittable c wnd is smaller, the wireless communication terminal 10 Transmits TCP segments up to the window size of c wn d, but the transmittable cwn d is calculated so as to secure the required bandwidth for real-time application data, which is a UDP flow. It does not use the bandwidth used by the flow.
- the wireless communication terminal apparatus reduces the required bandwidth of the real-time application data from the wireless bandwidth used in the wireless communication, thereby enabling the non-real-time application data to be transmitted.
- the available bandwidth is estimated, and based on the estimated available bandwidth, cwnd, which is the window size that the device can transmit, is calculated, and the calculated cwnd and the base station device that is the communication partner station can receive. Compares the window size with awnd, and transmits the data with the smaller window size, so that the amount of non-real-time application data that can be transmitted while securing the bandwidth of real-time application data is In wireless communication systems that use wireless bands, real-time QoS of application data can be guaranteed.
- the QoS of the real-time application data is guaranteed without changing the configuration of the existing base station device and the IP network. be able to.
- the present invention can be applied to a wireless communication device and a used band determining method, particularly to a wireless communication device and a used band determining method used in a wireless communication system in which TCP flows and UDP flows coexist.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030733099 EP1434458A1 (en) | 2002-05-30 | 2003-05-28 | Wireless communication device and usage band determination method |
KR10-2004-7002834A KR20040111325A (ko) | 2002-05-30 | 2003-05-28 | 무선 통신 장치 및 사용 대역 결정 방법 |
AU2003241809A AU2003241809A1 (en) | 2002-05-30 | 2003-05-28 | Wireless communication device and usage band determination method |
US10/489,097 US20040242219A1 (en) | 2002-05-30 | 2003-05-28 | Wireless communication device and usage band determination method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002156857A JP2003348642A (ja) | 2002-05-30 | 2002-05-30 | 無線通信装置および無線通信方法 |
JP2002-156857 | 2002-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003103329A1 true WO2003103329A1 (ja) | 2003-12-11 |
Family
ID=29706449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006631 WO2003103329A1 (ja) | 2002-05-30 | 2003-05-28 | 無線通信装置および使用帯域決定方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040242219A1 (ja) |
EP (1) | EP1434458A1 (ja) |
JP (1) | JP2003348642A (ja) |
KR (1) | KR20040111325A (ja) |
CN (1) | CN1565142A (ja) |
AU (1) | AU2003241809A1 (ja) |
WO (1) | WO2003103329A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006054729A1 (ja) * | 2004-11-18 | 2006-05-26 | Ntt Docomo, Inc. | 移動通信システム、移動局及び無線基地局 |
KR100974392B1 (ko) * | 2005-05-31 | 2010-08-05 | 닛본 덴끼 가부시끼가이샤 | 이동체 통신 시스템 및 그 통신 제어 방법 |
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CN100489716C (zh) * | 2005-09-21 | 2009-05-20 | 国际商业机器公司 | 处理度量流数据的方法及采样设备 |
JP4612523B2 (ja) * | 2005-10-13 | 2011-01-12 | 株式会社日立製作所 | 無線通信システム及び基地局 |
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Also Published As
Publication number | Publication date |
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EP1434458A1 (en) | 2004-06-30 |
JP2003348642A (ja) | 2003-12-05 |
KR20040111325A (ko) | 2004-12-31 |
CN1565142A (zh) | 2005-01-12 |
US20040242219A1 (en) | 2004-12-02 |
AU2003241809A1 (en) | 2003-12-19 |
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