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PDCP transmitting entity, secondary base station, user equipment and method thereof

An entity, sending window technology, applied in the directions of transmission path sub-channel allocation, signaling allocation, network traffic/resource management, etc., can solve the problems of PDCPTx sending confirmation message, unable to send PDCP PDU, data loss and other problems

Inactive Publication Date: 2015-11-25
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when PDCP PDU is sent by PDCP PDU to RLCTx located at SeNB through Xn interface, data may be lost
RLCTx located at SeNB cannot send an acknowledgment message to PDCP PDU because it has not received the data, which will cause PDCPTx to send the lost PDCP PDU and subsequent PDCP PDUs that can be sent (the sequence number of which is greater than the sequence number of the lost PDCP PDU and less than the sequence number of the PDCP PDU). After adding the serial number of the lost PDCP PDU to half of the serial number space), no new PDCP PDU can be sent, which affects the transmission delay and reliability of the wireless link

Method used

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  • PDCP transmitting entity, secondary base station, user equipment and method thereof
  • PDCP transmitting entity, secondary base station, user equipment and method thereof
  • PDCP transmitting entity, secondary base station, user equipment and method thereof

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Embodiment Construction

[0037] In the following, the principle and implementation of the present invention will become apparent by describing specific embodiments of the present disclosure in conjunction with the accompanying drawings. It should be noted that the present invention should not be limited to the specific examples described below. In addition, for the sake of brevity, detailed descriptions of known technologies not directly related to the present invention are omitted to prevent confusion to the understanding of the present invention.

[0038] In the following, the LTEl-12 mobile communication system and its subsequent evolution versions are taken as an example application environment, and multiple embodiments according to the present disclosure are described in detail. However, it should be noted that the present disclosure is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems.

[0...

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Abstract

Disclosed is a mechanism enabling a PDCP sending entity to move a send window after packet loss occurs on an Xn interface. According to an embodiment, a timer is set in the PDCP sending entity; the timer is started upon determining that packet loss may occur; and the send window is moved when the timer expires no matter whether PDCP PDUs on a lower bound of the send window are confirmed to be successfully sent. According to another embodiment, a DCP receiving entity is used to maintain a receive window and a t-Reordering timer is used to assist the PDCP sending entity in moving the send window, so that even if packet loss occurs on the Xn interface, the send window can be moved to continue sending subsequent PDCP PDUs.

Description

technical field [0001] The present disclosure relates to mobile communication, and in particular, relates to a packet data convergence protocol PDCP sending entity, a secondary base station, a PDCP receiving entity, a method for sending a packet data convergence protocol protocol data unit (PDCP PDU) at the PDCP sending entity, and the secondary base station reporting to the primary base station The method for sending the PDCP PDU successfully and the method for the PDCP receiving entity to confirm the successful receiving of the PDCP PDU, so that the sending window of the PDCP sending entity and the receiving window of the PDCP receiving entity move synchronously. Background technique [0002] The Layer 2 (layer2) User-Plane Protocol Stack (User-Plane Protocol Stack) of the 3rd Generation Partnership Project (3GPP) Long-term Evolution (LTE) system consists of 3 sublayers, from high to low: Packet Data Convergence Protocol (PDCP) ) layer, radio link control (RadioLinkControl...

Claims

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Application Information

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IPC IPC(8): H04W28/02
CPCH04W28/02H04L43/0829H04L69/28H04L5/0055H04W28/0268
Inventor 肖芳英刘仁茂
Owner SHARP KK