• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a method of polling a radio link control, and to polling (Polling) bit adaptively according to the current Radio Access Capability of the user terminal to improve the data rate of the user. To this end, the present invention provides a radio link control, which is an IMT-2000 protocol layer, comprising: a first process of determining whether a polling time is detected while transmitting a PDU to a peer in an RLC layer; A second step of transmitting a PDU in which a polling bit is set to a peer if a polling time point is determined as the result of the first step; A third step of determining whether an acknowledgment (ACK) signal for PDUs currently transmitted from the peer is received; A fourth step of increasing a polling request period when an acknowledgment (ACK) signal for currently transmitted PDUs is received as a result of the determination of the third step; As a result of the determination of the third process, if an acknowledgment (ACK) signal for currently transmitted PDUs is not received, a fifth process of reducing a polling request period is performed.
    公开号:KR20030084422A
    申请号:KR1020020023133
    申请日:2002-04-26
    公开日:2003-11-01
    发明作者:장성경
    申请人:엘지전자 주식회사；
    IPC主号:
    专利说明:

    POLLING METHOD OF RADIO LINK CONTROL}
    [2] The present invention relates to a method of polling a radio link control, and more particularly, to a method of polling a radio link control to adaptively perform a polling count according to a radio environment to improve a transmission rate of user data.
    [3] The RLC (Radio Link Control) layer, which is a protocol area of IMT-2000, is a protocol layer that controls a data link as a second layer of 3GPP.
    [4] The RLC layer receives two protocol data units (PDUs) from a receiver, and then two types of unacknowldeged PDUs (UMDPDUs) used when an acknowledgment signal is not required to the transmitter and an AMD Acknowlded PDU (AMPDU) used when an acknowledgment signal is required. Type PDUs exist, and various state variables and windows are used to control the flow of each PDU for data link control.
    [5] The PDU, which is a basic unit of transmission and reception in the RLC layer, is formed by attaching a header including a sequence number (SN) to an SDU descending from an upper layer. A PDU may be composed of several SDUs. It can also be part of an SDU.
    [6] Once stored in the RLC buffer, the PDUs are transmitted to the receiving end according to the transmission window, and the receiving end checks whether the sequence number (SN) of the received PDU is in the receiving window or outside the receiving window. Ignore the PDU and acknowledge (ACK) the presence or absence of an error for each PDU only for PDUs in the reception window, and send status information indicating whether the PDU is recognized (ACK) or not (NACK) for each PDU. do.
    [7] At this time, the receiving window and the transmitting window have the same size, and the transmitting end receiving the state information retransmits the PDU that is not recognized (NACK) to the receiving end.
    [8] In this case, the information indicating whether the acknowledgment (ACK) or the non-recognition (NACK) is a signal that is responded by a polling signal generated every predetermined period at the transmitter.
    [9] Here, the polling signal uses fixed values (values for generating polling signals at regular intervals) regardless of the radio environment of the current transmitter.
    [10] Therefore, when polling does not require the receiving end, that is, polling is required to the transmitting end even when user data can be transmitted without polling on the environment of the current transmitting end, a delay occurs when transmitting user data. There is this.
    [11] The present invention has been made to solve the above problems, the method of polling the radio link control to improve the data rate of the user by adaptively request the polling (Polling) bit in accordance with the current Radio Access Capability of the user terminal The purpose is to provide.
    [1] 1 is a flowchart illustrating a polling method of a radio link control of the present invention.
    [12] According to another aspect of the present invention, there is provided a radio link control, which is an IMT-2000 protocol layer, comprising: a first process of determining whether a polling time is detected while transmitting a PDU to a peer in an RLC layer; A second step of transmitting, to the peer, the PDU in which the polling bit is set, when the polling time is determined as the result of the first step; A third step of determining whether an acknowledgment (ACK) signal for PDUs currently transmitted from the peer is received; A fourth step of increasing a polling request period when an acknowledgment (ACK) signal for currently transmitted PDUs is received as a result of the determination of the third step; As a result of the determination of the third process, if an acknowledgment (ACK) signal for the currently transmitted PDUs is not received, the process is performed as a fifth process of reducing a polling request period.
    [13] If the polling request period coincides with the size of the window of the transmitted data, the fourth process includes implementing a polling time by setting a polling bit at the last PDU transmission of the transmitted data. Characterized in that.
    [14] Hereinafter, operations and effects of a polling method of a radio link control (RLC) according to the present invention will be described in detail with reference to the accompanying drawings.
    [15] FIG. 1 is a flowchart illustrating an embodiment of a polling method of a radio link control (RLC) of the present invention. As shown in FIG. 1, an RLC layer transmits a PDU to a peer and determines whether a polling time is present. 1 course; A second step of transmitting, to the peer, the PDU in which the polling bit is set, when the polling time is determined as the result of the first step; A third step of determining whether an acknowledgment (ACK) signal for PDUs currently transmitted from the peer is received; A fourth step of increasing a polling request period when an ACK signal for currently transmitted PDUs is received as a result of the determination of the third step; As a result of the determination of the third process, if an acknowledgment (ACK) signal for the currently transmitted PDUs is not received, a fifth process of reducing a polling request period is performed. The operation of the present invention will be described.
    [16] First, the PDU is continuously transmitted to the peer by the RLC layer, and when a preset polling time is established, the PDU is set to the polling bit to request the acknowledgment (ACK) to the peer.
    [17] If the polling request period is smaller than the size of the window of the transmission data, the polling time point is implemented by setting a polling bit at the time of transmission of the PDU located at a predetermined point of the transmission data.
    [18] Next, it is determined whether an acknowledgment (ACK) signal for PDUs currently transmitted from the peer is received.
    [19] As a result of the determination, when an acknowledgment (ACK) signal for the currently transmitted PDUs is received, it is determined that data transmission is possible without a special polling function because the current radio environment of the UE is good, thereby increasing the polling request period. Let's do it.
    [20] At this time, while repeating the process while increasing the polling request period, if the polling request period matches the size of the window of the transmission data, the polling time is at the time of transmitting the last PDU of the transmission data. Implemented by setting Polling bit in.
    [21] On the other hand, if an acknowledgment (ACK) signal for the currently transmitted PDUs is not received, it is determined that special polling is necessary because the radio environment of the current UE is not good, thereby reducing the polling request period in the RLC.
    [22] That is, the number of polling requests occurring in the RLC is increased.
    [23] In other words, the present invention adaptively requires polling bits according to the current radio access capability of the user terminal, thereby internally reducing unnecessary RLC polling functions to improve the data rate of the user.
    [24] The specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the extent that they should not be construed as limited to these specific embodiments and should not be construed in consultation. Various changes can be made within the scope of.
    [25] As described in detail above, the present invention does not manually generate the IMT-2000 RLC Polling technology according to a static value, such as a polling function proposed by 3GPP TSG, but polls according to the current radio access capability of the user terminal. By adaptively requesting the Polling bit, there is an effect of internally reducing unnecessary RLC polling functions to improve the data transmission rate of the user.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] In the radio link control which is an IMT-2000 protocol layer,
    A first step of determining whether a polling time is being transmitted while transmitting a PDU to a Peer in an RLC layer;
    A second step of transmitting a PDU in which a polling bit is set to a peer if a polling time point is determined as the result of the first step;
    A third step of determining whether an acknowledgment (ACK) signal for PDUs currently transmitted from the peer is received;
    A fourth step of increasing a polling request period when an acknowledgment (ACK) signal for currently transmitted PDUs is received as a result of the determination of the third step;
    The polling method of radio link control according to claim 3, wherein if the acknowledgment (ACK) signal for currently transmitted PDUs is not received, the polling request period is reduced.
    [2" claim-type="Currently amended] According to claim 1, The fourth process,
    If the polling request period is consistent with the size of the window of the transmitted data, the polling time point comprises implementing by setting a polling bit at the last PDU transmission of the transmitted data. How to poll the link control.
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    同族专利:
    公开号 | 公开日
    CN100356755C|2007-12-19|
    CN1454017A|2003-11-05|
    US20030202501A1|2003-10-30|
    US7450511B2|2008-11-11|
    KR100434054B1|2004-06-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-04-26|Application filed by 엘지전자 주식회사
    2002-04-26|Priority to KR10-2002-0023133A
    2003-11-01|Publication of KR20030084422A
    2004-06-04|Application granted
    2004-06-04|Publication of KR100434054B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR10-2002-0023133A|KR100434054B1|2002-04-26|2002-04-26|Polling method of radio link control|
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