Packet data convergence protocol pdcp entity and its execution method

A technology of packet data and aggregation protocol, applied in digital transmission system, using return channel for error prevention/detection, error prevention, etc., can solve problems such as PDCP PDU exceeding the validity period, affecting wireless link transmission delay and reliability, etc.

Inactive Publication Date: 2019-12-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the t-Reordering timer is set to a large value, PDCP PDUs not received in order will exceed their validity period due to waiting for deleted or lost PDCP PDUs in the retransmission buffer, thereby affecting the transmission delay of the wireless link and reliability

Method used

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  • Packet data convergence protocol pdcp entity and its execution method
  • Packet data convergence protocol pdcp entity and its execution method
  • Packet data convergence protocol pdcp entity and its execution method

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Embodiment Construction

[0029] In the following, the principle and implementation of the present invention will become apparent by describing specific embodiments of the present invention 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 that are not directly related to the present invention are omitted to prevent confusion to the understanding of the present invention.

[0030] The following takes the LTE Rel-12 mobile communication system and its subsequent evolution versions as an example application environment, and specifically describes multiple embodiments of the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems.

[0031]...

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Abstract

Disclosed are a method implemented by a packet data convergence protocol PDCP entity and corresponding entity equipment. The method includes: mapping PDCP PDUs received from the lower layer entities of the PDCP entities and arriving out of order into PDCP SDUs, and storing them in the reordering buffer; judging the sequence of the missing PDCP SDUs number is less than the smaller of the largest sequence numbers of PDCP SDUs received by the PDCP entity from the two lower-layer entities respectively; and if the sequence number of the missing PDCP SDU is smaller than the smaller, the buffer will be reordered The PDCP SDU whose sequence number is smaller than the sequence number of the missing PDCP SDU and the PDCP SDU whose sequence number is greater than the sequence number of the missing PDCP SDU and continuous with the sequence number of the missing PDCP SDU are submitted to the PDCP entity the upper entity.

Description

technical field [0001] The present invention relates to mobile communication, and specifically relates to a packet data convergence protocol PDCP entity and its execution method, which are used to enable the PDCP entity on the receiving side to deliver PDCP SDUs not received in sequence to the upper layer as soon as possible. Background technique [0002] The Layer 2 (1ayer2) User-Plane Protocol Stack (User-Plane Protocol Stack) of the 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE) system consists of 3 sub-layers, from high to low: Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer, radio link control (Radio Link Control, RLC) layer and media access control (Media Access Control1) layer. At the sending end, the service data unit (Service Data Unit, SDU) is received from the upper layer, the service is provided for the layer, and the protocol data unit (Protocol Data Unit, PDU) is output to the lower layer. For example: the R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04W28/06
CPCH04L1/1874H04L47/34H04L47/624
Inventor 肖芳英刘仁茂
Owner SHARP KK
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