Method and device for avoiding losing uplink data

A data loss and packet data technology, applied in network data management, error prevention/detection using return channels, wireless network protocols, etc. The effect of saving PDCP cache resources

Inactive Publication Date: 2014-11-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) Inter-RAT handover occurs after intra-RAT handover. PDCP entity A and PDCP entity B use the same RAT. During the second handover, the network situation is complicated, and PDCP entity C uses a different RAT. The forwarding of data packets may bring Therefore, it is possible that PDCP entity B will consider not forwarding data packets. At this time, the air interface will be responsible for retransmitting data packets, which brings reliability and low delay.

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  • Method and device for avoiding losing uplink data
  • Method and device for avoiding losing uplink data
  • Method and device for avoiding losing uplink data

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Experimental program
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Embodiment Construction

[0041] The main content of the present invention is that when the UE is sending uplink data, after the PDCP upper layer entity submits the data packet to the PDCP entity, the PDCP entity caches the PDCP SDU in the PDCP retransmission buffer, and starts a PDCP SDU for the PDCP SDU. discard_timer, when the discard_timer expires, the PDCP SDU will be automatically deleted from the retransmission cache. According to the principle of starting the discard-timer first, generally speaking, the PDCP SDU submitted first will be deleted before the PDCP SDU submitted later.

[0042] Among them, for the PDCP PDUs that the RLC entity of the UE indicates to the PDCP entity of the UE to be successfully transmitted, if the PDCP PDUs indicating that the PDCP entity is successfully transmitted are continuous, the PDCP entity of the UE will delete the corresponding PDUs corresponding to these continuous PDCP PDUs from the cache. If the PDCP PDUs successfully sent by the PDCP entity are discontinuo...

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Abstract

The invention discloses a method and a device for avoiding losing uplink data and relates to a long term evolution system. The method comprises the step of: only deleting packet data convergence protocol (PDCP) service data units (SDU) which are determined to be received continuously in PDCP feedback information in a PDCP retransmission cache when a PDCP entity of user equipment (UE) receives the PDCP feedback information in the process of reconstructing a PDCP. The technical scheme of the invention optimizes transmission of the uplink data, particularly avoids losing the data under the condition of continuously reconstructing the PDCP and saves the PDCP cache resources.

Description

technical field [0001] The present invention relates to a long-term evolution system, in particular to a method and a device for preventing uplink data loss in the long-term evolution system. Background technique [0002] LTE is a mobile communication system project organized by 3GPP. The main performance goals of this project include: providing a peak rate of 100Mbps downlink and 50Mbps uplink in a 20MHz spectrum bandwidth; improving the performance of cell edge users; increasing cell capacity; reducing system delay; supporting 100km radius Cell coverage; can provide 350km / h high-speed mobile users with access services greater than 100kbps; support paired or unpaired spectrum, flexible bandwidth configuration, etc. [0003] In order to achieve the above performance goals, the LTE system adopts a simplified system architecture, and its user plane network elements mainly include user equipment (UE, User Equipment), evolved node B (eNB, evolved NodeB) and serving gateway (S-GW...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/16H04W8/22H04W28/14H04W80/00
Inventor 王坚张健张银成
Owner ZTE CORP
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