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US20070086412A1 - Method for handling a polling timer after re-establishment in a wireless communications system - Google Patents

Method for handling a polling timer after re-establishment in a wireless communications system Download PDF

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Publication number
US20070086412A1
US20070086412A1 US11/564,303 US56430306A US2007086412A1 US 20070086412 A1 US20070086412 A1 US 20070086412A1 US 56430306 A US56430306 A US 56430306A US 2007086412 A1 US2007086412 A1 US 2007086412A1
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United States
Prior art keywords
timer
rlc
establishment
handling
entity
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/564,303
Inventor
Chih-Hsiang Wu
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Innovative Sonic Ltd
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Innovative Sonic Ltd
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Application filed by Innovative Sonic Ltd filed Critical Innovative Sonic Ltd
Priority to US11/564,303 priority Critical patent/US20070086412A1/en
Assigned to ASUSTEK COMPUTER INC. reassignment ASUSTEK COMPUTER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WU, CHIH-HSIANG
Publication of US20070086412A1 publication Critical patent/US20070086412A1/en
Assigned to INNOVATIVE SONIC LIMITED reassignment INNOVATIVE SONIC LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASUSTEK COMPUTER INC.
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/187—Details of sliding window management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • 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
    • H04L69/28—Timers or timing mechanisms used in protocols
    • 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
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • the present invention relates to a method for handling a Timer_Poll timer in a wireless communications system, and more specifically, to a method for handling a Timer_Poll timer after re-establishment in a wireless communications system.
  • FIG. 1 is a simplified block diagram of the prior art communications model.
  • a first station 10 is in wireless communications with one or more second stations 20 .
  • the first station 10 is comprised of upper layers 12 , a radio link control (RLC) entity 14 , and lower layers 16 which are below the RLC 14 .
  • RLC radio link control
  • the upper layers 12 can deliver messages to the RLC 14 through service data units (SDUs) 13 .
  • SDUs 13 may be of any size, and hold data that the upper layers 12 wish delivered to the second station 20 .
  • the RLC 14 composes the SDUs 13 into one or more protocol data units (PDUs) 15 .
  • Each PDU 15 of the RLC 14 is of a fixed size, and is delivered to the lower layers 16 .
  • the lower layers 16 include the physical layer, which is in charge of transmitting data to the second station 20 .
  • the second station 20 shown has exactly the same basic structure as the first station 10 .
  • the second station 20 also includes upper layers 22 , an RLC 24 , and lower layers 26 .
  • the second station 20 uses the upper layers 22 to transmit SDUs 23 to the RLC 24 , and uses the RLC 24 to transmit PDUs 25 to the lower layers 26 .
  • the data transmitted by the first station 10 is received by lower layers 26 of the second station 20 and reconstructed into one or more PDUs 25 , which are passed up to the RLC 24 .
  • the RLC 24 receives the PDUs 25 and from them assembles one or more SDUs 23 , which are then passed up to the upper layers 22 .
  • the upper layers 22 convert the SDUs 23 back into messages, which should be identical to the original messages that were generated by the first station 10 .
  • the terms SDU and PDU have broad meanings.
  • SDU is used to indicate SDUs passed from the upper layers to the RLC
  • PDU should be understood as PDUs passed from the RLC to lower layers.
  • the following disclosure will be written from the perspective of the first station 10 , unless otherwise noted.
  • a method for handling a Timer_Poll timer in a wireless communications system includes starting the Timer_Poll timer for a Radio Link Control Acknowledged Mode (RLC AM) entity, performing a re-establishment procedure for the RLC AM entity; and stopping the Timer_Poll timer after re-establishment of the RLC AM entity.
  • RLC AM Radio Link Control Acknowledged Mode
  • FIG. 1 is a simplified block diagram of the prior art communications model.
  • FIG. 2 is a message sequence chart illustrating handling of the Timer_Poll timer during a re-establishment function according to the present invention.
  • FIG. 2 is a message sequence chart illustrating handling of the Timer_Poll timer during a re-establishment function according to the present invention.
  • the present invention method includes stopping the Timer_Poll timer because the state of the RLC AM entity after re-establishment should be like the initial state of the RLC AM entity after it was established.
  • the present invention provides steps for handling the Timer_Poll after re-establishment. Therefore, using the method specified in the present invention will prevent RLC AM entities from experiencing deadlock, and will help maintain the quality of service.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

A method for handling a Timer_Poll timer in a wireless communications system includes starting the Timer_Poll timer for a Radio Link Control Acknowledged Mode (RLC AM) entity, performing a re-establishment procedure for the RLC AM entity; and stopping the Timer_Poll timer after re-establishment of the RLC AM entity.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This is a continuation application of application Ser. No. 10/064,747, filed Aug. 13, 2002, which is included in its entirety herein by reference.
    • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a method for handling a Timer_Poll timer in a wireless communications system, and more specifically, to a method for handling a Timer_Poll timer after re-establishment in a wireless communications system.
  • 2. Description of the Prior Art
  • Technological advances have moved hand in hand with more demanding consumer expectations. Devices that but ten years ago were considered cutting edge are today obsolete. These consumer demands in the marketplace spur companies towards innovation. The technological advances that result only serve to further raise consumer expectations. Presently, portable wireless devices, such as cellular telephones, personal digital assistants (PDAs), notebook computers, etc., are a high-growth market. However, the communications protocols used by these wireless devices are quite old. Consumers are demanding faster wireless access with greater throughput and flexibility. This has placed pressure upon industry to develop increasingly sophisticated communications standards. The 3rd Generation Partnership Project (3GPP) is an example of such a new communications protocol.
  • Please refer to FIG. 1. FIG. 1 is a simplified block diagram of the prior art communications model. In a typical wireless environment, a first station 10 is in wireless communications with one or more second stations 20. The first station 10 is comprised of upper layers 12, a radio link control (RLC) entity 14, and lower layers 16 which are below the RLC 14. In the following disclosure, all of the RLC entities are assumed to be RLC acknowledged mode (RLC AM) entities. The upper layers 12 can deliver messages to the RLC 14 through service data units (SDUs) 13. The SDUs 13 may be of any size, and hold data that the upper layers 12 wish delivered to the second station 20. The RLC 14 composes the SDUs 13 into one or more protocol data units (PDUs) 15. Each PDU 15 of the RLC 14 is of a fixed size, and is delivered to the lower layers 16. The lower layers 16 include the physical layer, which is in charge of transmitting data to the second station 20.
  • The second station 20 shown has exactly the same basic structure as the first station 10. The second station 20 also includes upper layers 22, an RLC 24, and lower layers 26. Just as with the first station 10, the second station 20 uses the upper layers 22 to transmit SDUs 23 to the RLC 24, and uses the RLC 24 to transmit PDUs 25 to the lower layers 26. The data transmitted by the first station 10 is received by lower layers 26 of the second station 20 and reconstructed into one or more PDUs 25, which are passed up to the RLC 24. The RLC 24 receives the PDUs 25 and from them assembles one or more SDUs 23, which are then passed up to the upper layers 22. The upper layers 22, in turn, convert the SDUs 23 back into messages, which should be identical to the original messages that were generated by the first station 10. In communication systems, the terms SDU and PDU have broad meanings. For purposes of the following disclosure, the term “SDU” is used to indicate SDUs passed from the upper layers to the RLC, and the term “PDU” should be understood as PDUs passed from the RLC to lower layers. In addition, for simplicity the following disclosure will be written from the perspective of the first station 10, unless otherwise noted.
  • During an RLC re-establishment function for acknowledged mode and unacknowledged mode, upper layers may request re-establishment of an RLC entity. However, the 3GPP TS 25.322 V3.11.0 specification does not specify how the Timer_Poll timer should be handled during re-establishment. Due to this lack of guidelines, potential problems could develop due to the improper use of the timer.
  • Therefore, since the current 3GPP specification does not specify how each of the Timer_Poll timer should be handled during re-establishment, deadlock can occur and quality of service may be reduced substantially.
    • SUMMARY OF THE INVENTION
  • It is therefore a primary objective of the claimed invention to provide a method for handling a Timer_Poll timer after an RLC reset or re-establishment in a wireless communications system in order to solve the above-mentioned problems.
  • According to the claimed invention, a method for handling a Timer_Poll timer in a wireless communications system includes starting the Timer_Poll timer for a Radio Link Control Acknowledged Mode (RLC AM) entity, performing a re-establishment procedure for the RLC AM entity; and stopping the Timer_Poll timer after re-establishment of the RLC AM entity.
  • These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a simplified block diagram of the prior art communications model.
  • FIG. 2 is a message sequence chart illustrating handling of the Timer_Poll timer during a re-establishment function according to the present invention.
    • DETAILED DESCRIPTION
  • Please refer to FIG. 2. FIG. 2 is a message sequence chart illustrating handling of the Timer_Poll timer during a re-establishment function according to the present invention. After the RLC AM entity 14 is re-established by upper layers, the present invention method includes stopping the Timer_Poll timer because the state of the RLC AM entity after re-establishment should be like the initial state of the RLC AM entity after it was established.
  • Compared to the prior art, the present invention provides steps for handling the Timer_Poll after re-establishment. Therefore, using the method specified in the present invention will prevent RLC AM entities from experiencing deadlock, and will help maintain the quality of service.
  • Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.

Claims (1)

1. A method for handling a Timer_Poll timer in a wireless communications system, the method comprising:
starting the Timer_Poll timer for a Radio Link Control Acknowledged Mode (RLC AM) entity;
performing a re-establishment procedure for the RLC AM entity; and
stopping the Timer_Poll timer after re-establishment of the RLC AM entity.
US11/564,303 2002-08-13 2006-11-29 Method for handling a polling timer after re-establishment in a wireless communications system Abandoned US20070086412A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/564,303 US20070086412A1 (en) 2002-08-13 2006-11-29 Method for handling a polling timer after re-establishment in a wireless communications system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/064,747 US7227856B2 (en) 2002-08-13 2002-08-13 Method for handling timers after an RLC reset or re-establishment in a wireless communications system
US11/564,303 US20070086412A1 (en) 2002-08-13 2006-11-29 Method for handling a polling timer after re-establishment in a wireless communications system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/064,747 Continuation US7227856B2 (en) 2002-08-13 2002-08-13 Method for handling timers after an RLC reset or re-establishment in a wireless communications system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/026,103 Division US8343069B2 (en) 2004-03-25 2008-02-05 In-vivo information acquisition apparatus and in-vivo information acquisition apparatus system

Publications (1)

Publication Number Publication Date
US20070086412A1 true US20070086412A1 (en) 2007-04-19

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ID=30769103

Family Applications (10)

Application Number Title Priority Date Filing Date
US10/064,747 Active 2025-03-15 US7227856B2 (en) 2002-08-13 2002-08-13 Method for handling timers after an RLC reset or re-establishment in a wireless communications system
US11/561,900 Expired - Lifetime US7561561B2 (en) 2002-08-13 2006-11-21 Method for handling timers after an RLC re-establishment in a wireless comminications system
US11/564,296 Abandoned US20070097944A1 (en) 2002-08-13 2006-11-29 Method for handling reset timer after an rlc re-establishment in a wireless communications system
US11/564,303 Abandoned US20070086412A1 (en) 2002-08-13 2006-11-29 Method for handling a polling timer after re-establishment in a wireless communications system
US11/564,305 Expired - Lifetime US7496085B2 (en) 2002-08-13 2006-11-29 Method for handling periodic status report timer after an RLC re-establishment in a wireless communications system
US11/564,293 Abandoned US20070086410A1 (en) 2002-08-13 2006-11-29 Method for handling a poll prohibit timer after re-establishment in a wireless communications system
US11/564,298 Abandoned US20070086411A1 (en) 2002-08-13 2006-11-29 Method for handling data discard signaling timer after an rlc re-establishment in a wireless communications system
US11/564,304 Expired - Lifetime US7554963B2 (en) 2002-08-13 2006-11-29 Method for handling data discard timer after an RLC reset or re-establishment in a wireless communications system
US11/564,306 Expired - Lifetime US7542457B2 (en) 2002-08-13 2006-11-29 Method for handling periodic status report timer after an RLC reset in a wireless communications system
US11/564,294 Abandoned US20070081511A1 (en) 2002-08-13 2006-11-29 Method for handling status report prohibit timer after re-establishment in a wireless communications system

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US10/064,747 Active 2025-03-15 US7227856B2 (en) 2002-08-13 2002-08-13 Method for handling timers after an RLC reset or re-establishment in a wireless communications system
US11/561,900 Expired - Lifetime US7561561B2 (en) 2002-08-13 2006-11-21 Method for handling timers after an RLC re-establishment in a wireless comminications system
US11/564,296 Abandoned US20070097944A1 (en) 2002-08-13 2006-11-29 Method for handling reset timer after an rlc re-establishment in a wireless communications system

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US11/564,305 Expired - Lifetime US7496085B2 (en) 2002-08-13 2006-11-29 Method for handling periodic status report timer after an RLC re-establishment in a wireless communications system
US11/564,293 Abandoned US20070086410A1 (en) 2002-08-13 2006-11-29 Method for handling a poll prohibit timer after re-establishment in a wireless communications system
US11/564,298 Abandoned US20070086411A1 (en) 2002-08-13 2006-11-29 Method for handling data discard signaling timer after an rlc re-establishment in a wireless communications system
US11/564,304 Expired - Lifetime US7554963B2 (en) 2002-08-13 2006-11-29 Method for handling data discard timer after an RLC reset or re-establishment in a wireless communications system
US11/564,306 Expired - Lifetime US7542457B2 (en) 2002-08-13 2006-11-29 Method for handling periodic status report timer after an RLC reset in a wireless communications system
US11/564,294 Abandoned US20070081511A1 (en) 2002-08-13 2006-11-29 Method for handling status report prohibit timer after re-establishment in a wireless communications system

Country Status (7)

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US (10) US7227856B2 (en)
EP (12) EP1777857B1 (en)
JP (11) JP2004080752A (en)
KR (1) KR100528676B1 (en)
CN (11) CN101262320B (en)
DE (1) DE60318655T2 (en)
TW (1) TWI220830B (en)

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