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Method and system for receiving PDCP (packet data convergence protocol) data packets

A receiving method and technology of a receiving system are applied in the field of receiving PDCP data packets, which can solve the problems of data packet discarding and affecting service rate, and achieve the effects of preventing mutation, improving robustness and improving experience.

Active Publication Date: 2017-01-25
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the traditional technical solution, when the bottom layer suddenly introduces abnormal malformed packets in the normal business process, a large number of received data packets will be discarded, affecting the business rate

Method used

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  • Method and system for receiving PDCP (packet data convergence protocol) data packets
  • Method and system for receiving PDCP (packet data convergence protocol) data packets
  • Method and system for receiving PDCP (packet data convergence protocol) data packets

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Embodiment Construction

[0022] Embodiments of the PDCP data packet receiving method and system of the present invention are described below with reference to the accompanying drawings.

[0023] refer to figure 1 shown, figure 1 It is a flow chart of the receiving method of the PDCP data packet of the present invention, including:

[0024] S101, receive PDU data, and extract a PDCP sequence number according to the PDU data;

[0025] In the above steps, it is mainly the process of extracting the PDCP serial number. As an embodiment, the specific extraction process can be as follows:

[0026] The uplink AM mode PDU data submitted by the RLC layer is parsed at the PDCP protocol layer of the base station to obtain the PDCP sequence number.

[0027] S102, according to the value relationship between the PDCP sequence number and the next to-be-received PDU sequence number, detect whether the data link is in a discontinuous transmission state;

[0028] In this step, the PDCP sequence number is compared wi...

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Abstract

The invention relates to a method and system for receiving PDCP (packet data convergence protocol) data packets; the method comprises the steps of receiving PDU (packet data unit) data, and extracting a PDCP serial number according to the PDU data; detecting whether a data link is under discontinuous transmission or not according to a value relationship between the PDCP serial number and a next PDU serial number to be received; if yes, determining whether a data link receiving the PDU data currently is under upward reestablishment or not; if the data link is not under upward reestablishment, abandoning the PDU data, and keeping a state variable to a previous recorded value. Determining and abandoning are performed upon the receipt of an abnormal malformed packet, related state variables are under good maintenance, abrupt change of PDCUP state variables is prevented, malformed data packets from a bottom layer are rejected in time such that mistaken abandoning of subsequent massive correct data packets due to one malformed packet is avoided, the robustness of PDCP protocol layer in processing data services is greatly improved, and user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and system for receiving PDCP data packets. Background technique [0002] The user plane protocol stack of LTE (Long Term Evolution) mainly includes: PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol), RLC (Radio Link Control, Radio Link Control Layer), MAC (Medium Access Control, media access control), PLY (Physical Layer, physical layer). The main functions of PDCP are: header compression of IP (Internet Protocol, protocol for interconnection between networks) data packets, data encryption and decryption, timer discarding, retransmission and reordering processing during re-establishment. [0003] The PDCP protocol includes a number of state variables, which control the receiving or discarding of uplink data according to the requirements of the protocol, mainly including: the sequence number of the next PDU to be sent (Next_P...

Claims

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Application Information

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IPC IPC(8): H04L12/801H04L12/823H04L47/32
CPCH04L47/32H04L47/34
Inventor 陈细生
Owner COMBA TELECOM SYST CHINA LTD
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