WO2007108657A1 - Procédé de demande de ressources sur la base d'un temporisateur de systèmes de télécommunication mobile - Google Patents
Procédé de demande de ressources sur la base d'un temporisateur de systèmes de télécommunication mobile Download PDFInfo
- Publication number
- WO2007108657A1 WO2007108657A1 PCT/KR2007/001404 KR2007001404W WO2007108657A1 WO 2007108657 A1 WO2007108657 A1 WO 2007108657A1 KR 2007001404 W KR2007001404 W KR 2007001404W WO 2007108657 A1 WO2007108657 A1 WO 2007108657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- timer
- terminal
- base station
- scheduling information
- query
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
-
- 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
-
- 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
- H04L47/82—Miscellaneous aspects
- H04L47/826—Involving periods of time
Definitions
- the present invention relates to a timer-based resource requesting method in a mobile telecommunication system; and, more particularly, to a resource requesting method for transmitting a traffic to uplink in a packet- based mobile telecommunication system.
- a standard and system for wireless Internet service has been actively developed based on Broadband Radio Access Network High Performance Local Area Network (BRAN HIPERLAN) /2, Institute of Electrical and Electronic Engineers (IEEE) 802.11, IEEE 802.16 and 3 rd Generation Partnership Project (3GPP) standardization organization. Also, a packet transmission technology has become important to preoccupy the technological prowess of a 4 th generation mobile telecommunication system based on a packet.
- the IEEE 802.16 and 3GPP Release 6 are cellular series.
- the IEEE 802.11 and HIPERLAN 2 is LAN series.
- the IEEE 802.16 series include IEEE 802.16d, which is already standardized, and IEEE 802.16e, which is to be standardized soon.
- HSUPA Uplink Enhancement
- LAN Local Area Network
- OFDM Orthogonal Frequency Division Multiplexing
- a resource requesting and uplink packet scheduling method for satisfying quality of service (QoS) request and maximizing efficiency of radio resources in packet transmission is a specialized field of a wireless link sharing method. Also, the resource requesting and uplink packet scheduling method is important to improve capacity of the system in comparison with a typical circuit method.
- Uplink scheduling is performed based on scheduling information, which is transmitted to request resource such as QoS information when connection is set up and buffer status information reported from the terminal.
- the QoS information is an index to be averagely and ultimately satisfied by the uplink scheduling.
- the scheduling information is a standard for indicating a level of short-term service satisfaction of a user element.
- Optimal uplink scheduling may be performed when the QoS information and the scheduling information are converged.
- the resource request denotes a series of procedures that the terminal notifies to the base station whether data to be transmitted to uplink exist and whether allocation of required resource is requested. Since the uplink scheduling is performed based on a buffer status reported by the terminal differently from the downlink scheduling, which transmits data while grasping a buffer status in downlink in real-time, an efficient resource request method for maximizing wireless resource application and providing the QoS is required. A property of a report time should be considered to efficiently perform the resource request method.
- a proper report time means that the report should be performed at a proper time to secure the QoS. For example, when the report is not performed at a proper time in a status that a quantity of packets waiting in a current terminal buffer increases, the transmitted data, to which uplink resource is allocated, do not satisfy a delay request in a network point of view. Therefore, successfully transmitted data may be discarded. The higher a report frequency is, the more the uplink scheduling performance improves. However, there is a trade-off that wireless resources are used excessively.
- the proper report time is closely related to the delay from a time that the terminal determines the resource request to a time that the base station finally recognizes. The more the delay increases, the less the useful the transmission data become. The matters related to the resource request delay have a close relationship with a frame structure and a channel structure design.
- An embodiment of the present invention is directed to providing a timer-based resource requesting method which can secure Quality-of-Service (QoS) according to diverse uplink traffic characteristics in a packet-based mobile telecommunication system by performing a resource request procedure between a base station and a terminal based on a timer.
- QoS Quality-of-Service
- a timer-based resource requesting method in a mobile telecommunication system including the steps of: a) waiting in a waiting mode for an event to occur while a timer of a terminal operates; b) transmitting scheduling information including information on a quantity of packets existing in a terminal buffer to a base station when operation of the timer ends at a predetermined threshold time; and c) initializing the timer.
- the present invention can request resource at a right time by processing a resource request procedure between a base station and a terminal based on a timer in a packet-based mobile telecommunication system.
- the present invention can secure quality of service (QoS) according to diverse uplink traffic characteristics in a Medium Access Control (MAC) layer of the packet-based mobile telecommunication system.
- QoS quality of service
- MAC Medium Access Control
- Fig. 1 is a flowchart describing a timer-based resource request procedure in the terminal in accordance with an embodiment of the present invention.
- Fig. 2 is a flowchart describing a timer-based resource request procedure in the base station in accordance with the embodiment of the present invention
- Fig. 3 shows an operation of the base station and the terminal in which the timer-based resource request procedure is executed in accordance with the embodiment of the present invention.
- Fig. 4 shows an operation of the base station and the terminal when the timer-based resource request scheme according to the present invention is applied to periodic-interval variable-size (PV) traffic, which generates packets of variable sizes at a periodic interval .
- PV periodic-interval variable-size
- a timer-based resource requesting method in a mobile telecommunication system including the steps of: a) waiting in a waiting mode for an event to occur while a timer of a terminal operates; b) transmitting scheduling information including information on a quantity of packets existing in a terminal buffer to a base station when operation of the timer ends at a predetermined threshold time; and c) initializing the timer.
- a timer-based resource requesting method in a mobile telecommunication system including the steps of: a) waiting in a waiting mode for an event tp occur while a timer of a terminal operates; b) receiving a query from a base station; c) transmitting scheduling information to the base station based on resource allocation information of the query; and c) initializing the timer, wherein the query includes uplink resource allocation information for transmitting the scheduling information.
- a timer-based resource requesting method in a mobile telecommunication system including the steps of: a) waiting in a waiting mode for an event to occur while a timer of a base station operates; b) transmitting a query to the terminal when operation of the timer ends at a predetermined threshold time; and c) initializing the timer, wherein the query includes uplink resource allocation information for transmitting scheduling information.
- a timer-based resource requesting method in a mobile telecommunication system including the steps of: a) waiting in a waiting mode for an event to occur while a timer of a base station operates; b) receiving a random access message including scheduling information from a terminal; and c) initializing the timer, wherein the scheduling information includes information on a quantity of packets existing in a terminal buffer.
- a base station and a terminal respectively maintain an independent timer
- the base station and the terminal control the resource request.
- One terminal can have a plurality of uplinks according to each traffic and resource is basically requested to a specific link of the terminal.
- the terminal has a request timer, which increases by 1 every unit time, i.e., a slot.
- a value of the request timer accesses a threshold T r
- the terminal transmits scheduling information (SI) to the base station using a random access (RA) message, and resets the request timer.
- SI scheduling information
- RA random access
- the random access message is operated based on contention. That is, when a plurality of terminals simultaneously transmit a message, the base station may not analyze the message of the terminal. The base station successfully receiving the random access message can use the scheduling information on further scheduling.
- the base station has a query timer, which increases by 1 per unit time.
- the query includes resource allocation information that the base station allocates not for data transmission but for scheduling information transmission to figure out a quantity of packets waiting in a current terminal, i.e., buffer occupancy (BO), and Head-Of-Line (HOL) delay.
- the resource allocation for query is operated based on non- contention.
- T q When a value of the query timer excesses a threshold T q , the base station transmits the query to the terminal and resets the query timer.
- the terminal successfully receiving the query allocates scheduling information for notifying a current buffer status to the resource and transmits the scheduling information to the base station.
- the base station uses the transmitted scheduling information in future scheduling.
- the request timer of the terminal is reset in a case that the request timer successfully receives the query from the base station, that the request timer successfully receives uplink resource allocation information from the base station, that time-out of the request timer is performed, that new data arrive and a random access message is transmitted, or that the waiting packet is discarded due to access of the delay threshold and the random access message is transmitted.
- the query timer of the base station is reset in a case that the query timer reaches a predetermined time, that scheduling of the terminal is performed, that a protocol data unit (PDU) including scheduling information is received, or that a random access message including scheduling information is successfully received.
- PDU protocol data unit
- a resource request procedure may be redefined as a series of procedures that the terminal reports scheduling information for uplink traffic to the base station.
- the scheduling information includes buffer occupancy and Head-Of-Line delay information.
- the buffer occupancy is generally represented as the number of bytes or byte units.
- the terminal according to the present invention transmits scheduling information to the base station according to diverse methods below. That is, when the terminal receives the query from the base station, the terminal can transmit scheduling information using resource for transmitting the scheduling information allocated by the query. When the request timer reaches a predetermined time, the terminal can transmit scheduling information using the random access message. When the request timer receives allocation information for transmitting uplink data, on which uplink scheduling is performed, from the base station, the terminal can transmit the allocation information by piggybacking scheduling information on the transmission data. According to a scheduling information transmitting method by the query, the scheduling information is transmitted through information element (IE) without transmitting data using media access control (MAC) status protocol data unit.
- IE information element
- MAC media access control
- the scheduling information transmitting method by piggybacking of the transmission data includes a method for transmitting scheduling information to a header of the MAC protocol data unit for data transmission through information element and a method for transmitting scheduling information through information element by being concatenated to the MAC protocol data unit for data transmission.
- Fig. 1 is a flowchart describing a timer-based resource request procedure in the terminal in accordance with an embodiment of the present invention.
- the terminal waits occurring of an event in a waiting mode that the request timer is operating.
- the terminal When the terminal receives uplink allocation information from the base station in the waiting mode of the step SIlO at step S120, the terminal transmits data using allocated wireless resource and determines at step S121 whether a non-transmitted service data unit (SDU) exists in a buffer. When it turns out at the step S121 that the service data unit exists, the terminal transmits scheduling information to the base station by piggybacking scheduling information including a quantity of packets waiting in a current buffer, i.e., buffer occupancy, and Head-Of-Line delay information to the protocol data unit at step S122.
- SDU non-transmitted service data unit
- the terminal transmits scheduling information including buffer empty information to the base station by piggybacking the scheduling information in the protocol data unit at step S123, resets a request timer at step S150, and goes back to the waiting mode of the step SIlO.
- the terminal determines at step S131 whether the service data unit exists in the buffer.
- scheduling information including buffer occupancy and Head-Of-Line delay information is transmitted using the status protocol data unit at step S132.
- the terminal transmits the scheduling information including buffer empty information to the base station using the status protocol data unit at step S133, resets the request timer at step S150, and goes back to the waiting mode of the step SIlO.
- Fig. 2 is a flowchart describing a timer-based resource request procedure in the base station in accordance with the embodiment of the present invention.
- the base station waits occurring of an event in a waiting mode that a query timer is operating.
- the base station When the base station receives a random access message including scheduling information from the terminal in the waiting mode of the step S210 at step S220, the base station updates the scheduling information at step S221, resets the query timer at step S260, and goes back to the waiting mode of the step S210.
- the base station When the base station performs scheduling on the terminal in the waiting mode of the step S210 at step S230, the base station transmits uplink allocation information at step S231, resets the query timer at the step S260, and goes back to the waiting mode of the step S210.
- the base station When the base station receives the protocol data unit including scheduling information from the terminal in the waiting mode of the step S210 at step S240, the base station updates the scheduling information at the step S221, resets the query timer at the step S260, and goes back to the waiting mode of the step S210.
- the base station transmits the query to the terminal at step S
- Fig. 3 shows an operation of the base station and the terminal in which the timer-based resource request procedure is executed in accordance with the embodiment of the present invention.
- a thick line denotes the operation of the query timer and a thin line denotes the operation of the request timer.
- the terminal transmits scheduling information for notifying a current buffer status using the random access message and resets the request timer.
- the query timer is reset.
- the base station performs scheduling on the terminal, transmits uplink allocation information for data transmission, and resets a query timer.
- the terminal transmits the scheduling information by piggybacking the scheduling information and resets the request timer.
- the buffer becomes empty.
- the base station transmits buffer empty information by piggybacking the buffer empty information. Since the current buffer is empty, the base station successfully receiving the buffer empty information stops scheduling on the link by a time t3.
- the terminal resets the request timer and does not increase the timer by the time t3 when the new packet arrives. Since the base station does not successfully receive the random access message, the base station does not reset the query timer, but continuously increases the query timer.
- the terminal transmits the random access message and operates the request timer.
- the base station transmits the query to the terminal and resets the query timer. Since the terminal does not successfully receive the query, the request timer is reset.
- resource is allocated and the terminal transmits the packet.
- a new packet is generated. However, since resource is currently allocated, an additional random access message is not transmitted, but scheduling information on a changed buffer status is transmitted by piggybacking the scheduling information.
- the terminal is scheduled. However, since the terminal does not successfully receive the resource allocation information, the request timer is not reset, but continuously increases.
- the request timer is expired and the random access message is transmitted.
- the request timer is reset. Since the base station successfully receives the random access message, the query timer is reset.
- a new packet arrives at a status that the buffer is empty.
- the terminal transmits a random access message and the base station successfully receives the random access message.
- the new packet arrives and the random access message is transmitted.
- the base station does not successfully receive the random access message.
- the query timer of the base station is expired and the query is transmitted.
- the terminal is scheduled.
- the query timer according to the present invention is not applied in the above example, it may cause waste in resource allocation at the time t7.
- quantities of packets arriving at the times t3 and t4 are set as 5000 bytes and 500byte, respectively, it is assumed that the packets arriving at the time t3 are deleted due to delay access at the time t5. Since the base station does not receive the scheduling information at times t4 and t5, the base station grasps that the buffer of the current terminal is 5000 bytes. However, there are currently 500 bytes in the buffer of the terminal. Therefore, the base station performs scheduling of 5000 bytes at the time t7 and the resource space of 4500 bytes is wasted.
- the query is normally performed at the time t6 by introduction of the query timer, the base station can exactly maintain the buffer status of the terminal later on.
- Fig. 4 shows an operation of the base station and the terminal when the timer-based resource request scheme according to the present invention is applied to periodic-interval variable-size (PV) traffic, which generates packets of variable sizes at a periodic interval .
- PV periodic-interval variable-size
- the traffic to which the timer-based resource request scheme according to the present invention is applied includes periodic-interval fixed-size (PF) traffic, PV traffic, and aperiodic-interval variable-size (AV) traffic.
- PF periodic-interval fixed-size
- PV periodic-interval
- AV aperiodic-interval variable-size
- the PF traffic generates packets of a fixed size at a periodic interval.
- the PV traffic generates packets of variable sizes at a periodic interval.
- the AV traffic generates packets of variable sizes at an aperiodic interval.
- VoIP Voice over IP
- MPEG Moving Picture Experts Group
- FTP file transfer protocol
- a request offset T 0 is a time interval from a sampling time to a time when a random access message is transmitted.
- the packets arrive at the buffer.
- the packets may arrive a series of slots at one sampling time and it occurs due to a time taken for converting the payload into an Internet protocol packet.
- the terminal resets the request timer and does not increase from the time tO to the time tl, which is the time after the request offset.
- the terminal does not receive the query or the resource allocation during the period, the terminal resets the request timer at the time tl and transmits the random access message.
- the base station successfully receives the random access message, the base station resets the query timer. Subsequently, resource is allocated in series at times t2 and t3, respectively.
- RTCP real-time transport protocol control protocol
- the technology of the present invention can be realized as a program and stored in a computer-readable recording medium, such as CD-ROM, random accessM, ROM, floppy disk, hard disk and magneto- optical disk. Since the process can be easily implemented by those skilled in the art of the present invention, further description will not be provided herein.
- the present invention can perform a resource request procedure at a proper time by processing the resource request procedure between a base station and a terminal based on a timer in a packet-based mobile telecommunication system.
- the present invention can secure quality of service (QoS) according to diverse uplink traffic characteristics in a Medium Access Control (MAC) layer of the packet-based mobile telecommunication system.
- QoS quality of service
- MAC Medium Access Control
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
L'invention concerne un procédé de demande de ressources sur la base d'un temporisateur dans un système de télécommunication mobile. Ce procédé de demande de ressources consiste à : a) attendre dans un mode d'attente qu'un événement se produise pendant le fonctionnement du temporisateur d'un terminal; b) à envoyer des données d'ordonnancement contenant des informations sur la quantité de paquets existant dans un tampon de terminal à une station de base lorsque le fonctionnement du temporisateur arrive à son terme à un temps seuil prédéterminé et c) à initialiser le temporisateur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/293,977 US8514831B2 (en) | 2006-03-22 | 2007-03-22 | Method for requesting resource based on timer in mobile telecommunication systems |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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KR10-2006-0026244 | 2006-03-22 | ||
KR20060026244 | 2006-03-22 | ||
KR10-2007-0022856 | 2007-03-08 | ||
KR1020070022856A KR101354630B1 (ko) | 2006-03-22 | 2007-03-08 | 이동통신 시스템에서의 타이머 기반의 자원 요청 방법 |
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WO2007108657A1 true WO2007108657A1 (fr) | 2007-09-27 |
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PCT/KR2007/001404 WO2007108657A1 (fr) | 2006-03-22 | 2007-03-22 | Procédé de demande de ressources sur la base d'un temporisateur de systèmes de télécommunication mobile |
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Cited By (5)
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WO2009115971A1 (fr) | 2008-03-21 | 2009-09-24 | Koninklijke Philips Electronics N.V. | Procédé de communication et station radio correspondante |
WO2009115970A1 (fr) * | 2008-03-21 | 2009-09-24 | Koninklijke Philips Electronics N.V. | Procédé de communication et station radio correspondante |
CN102711265A (zh) * | 2008-09-22 | 2012-10-03 | 宏达国际电子股份有限公司 | 同步半持续性调度数据传输和资源抵达的方法及其装置 |
WO2021087886A1 (fr) * | 2019-11-07 | 2021-05-14 | Oppo广东移动通信有限公司 | Procédé de réglage de temporisateur et dispositif associé |
WO2022127302A1 (fr) * | 2020-12-17 | 2022-06-23 | 中兴通讯股份有限公司 | Système et procédé de temporisateur |
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US9603128B2 (en) | 2008-03-21 | 2017-03-21 | Koninklijke Philips N.V. | Method for communicating and radio station therefor |
CN101978764A (zh) * | 2008-03-21 | 2011-02-16 | 皇家飞利浦电子股份有限公司 | 用于通信的方法和用于通信的无线电站 |
CN107105512B (zh) * | 2008-03-21 | 2023-06-20 | 皇家飞利浦电子股份有限公司 | 用于通信的方法和用于通信的无线电站 |
TWI489808B (zh) * | 2008-03-21 | 2015-06-21 | Koninkl Philips Electronics Nv | 用以通信的方法及其無線電台 |
KR101512993B1 (ko) | 2008-03-21 | 2015-04-17 | 코닌클리케 필립스 엔.브이. | 통신을 위한 방법 및 그를 위한 라디오 스테이션 |
JP2011515938A (ja) * | 2008-03-21 | 2011-05-19 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 通信方法及びそのための無線局 |
JP2011515937A (ja) * | 2008-03-21 | 2011-05-19 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 通信方法及びそのための無線局 |
USRE48234E1 (en) | 2008-03-21 | 2020-09-29 | Koninklijke Philips N.V. | Method for communicating and radio station therefor |
US8509187B2 (en) | 2008-03-21 | 2013-08-13 | Koninklijke Philips N.V. | Method for communicating and radio station therefor |
TWI468061B (zh) * | 2008-03-21 | 2015-01-01 | Koninkl Philips Electronics Nv | 用以通信的方法及其無線電台 |
KR20110000657A (ko) * | 2008-03-21 | 2011-01-04 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 통신하는 방법 및 그것을 위한 무선국 |
WO2009115970A1 (fr) * | 2008-03-21 | 2009-09-24 | Koninklijke Philips Electronics N.V. | Procédé de communication et station radio correspondante |
CN101978765A (zh) * | 2008-03-21 | 2011-02-16 | 皇家飞利浦电子股份有限公司 | 用于通信的方法及用于其的无线电台 |
US9088998B2 (en) | 2008-03-21 | 2015-07-21 | Koninklijke Philips N.V. | Method for communicating and radio station therefor |
KR101595992B1 (ko) * | 2008-03-21 | 2016-02-22 | 코닌클리케 필립스 엔.브이. | 통신하는 방법 및 그것을 위한 무선국 |
WO2009115971A1 (fr) | 2008-03-21 | 2009-09-24 | Koninklijke Philips Electronics N.V. | Procédé de communication et station radio correspondante |
CN107105512A (zh) * | 2008-03-21 | 2017-08-29 | 皇家飞利浦电子股份有限公司 | 用于通信的方法和用于通信的无线电站 |
CN102711265A (zh) * | 2008-09-22 | 2012-10-03 | 宏达国际电子股份有限公司 | 同步半持续性调度数据传输和资源抵达的方法及其装置 |
CN102711265B (zh) * | 2008-09-22 | 2015-04-08 | 宏达国际电子股份有限公司 | 同步半持续性调度数据传输和资源抵达的方法及其装置 |
WO2021087886A1 (fr) * | 2019-11-07 | 2021-05-14 | Oppo广东移动通信有限公司 | Procédé de réglage de temporisateur et dispositif associé |
WO2022127302A1 (fr) * | 2020-12-17 | 2022-06-23 | 中兴通讯股份有限公司 | Système et procédé de temporisateur |
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