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A data transmission method and device

A data transmission method and a technology of a data transmission device, which are applied in digital transmission systems, transmission systems, data exchange networks, etc., can solve the problems of prolonging the sorting time, reducing the efficiency of PDCP PDU sorting, and high complexity, so as to improve the sorting efficiency and reduce the The effect of data transmission delay

Active Publication Date: 2019-08-20
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution has the following problems: a set of sequential sending and receiving reordering mechanisms are added to the PDCP protocol. When PDCP sorts through the SN numbers of PDCP PDUs, it is possible to sort PDCP PDUs sent by multiple RLCs. , resulting in high complexity and prolonged sorting; and in the application scenario of reestablishment, because the transmission delay of each bearer air interface between RLC and PDCP is different, the SN number corresponding to the PDU received by PDCP has a large span, It brings challenges to PDCP reordering window maintenance and reordering timer design, reducing the ordering efficiency of PDCP PDUs

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Embodiment Construction

[0036] In order to improve the ordering efficiency of PDCP PDUs, the embodiments of the present invention provide a data transmission method and device.

[0037] Such as Figure 1a As shown, it is a schematic diagram of an application scenario implemented by the data transmission method provided by the embodiment of the present invention. One PDCP bearer (RB) corresponds to k (k is a positive integer greater than or equal to 1) RLC bearers. The PDCP PDU on any PDCP bearer needs to be distributed to the corresponding k RLC bearers for data transmission through k RLC entities, and one PDCP bearer needs to receive PDCP PDUs submitted by k RLC bearers. The data packets received by the bearer are processed and then delivered to the upper layer.Figure 1a In the figure shown, there are n (n is a positive integer greater than or equal to 1) PDCPs.

[0038] The main purpose of the PDCP protocol layer is to send or receive packet data from peer PDCP entities. This layer mainly complete...

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Abstract

The invention discloses a data transmission method and device which are used for improving the PDCP PDU sorting efficiency. The data transmission method comprises the step that PDCP PDUs are sent to multiple radio link control (RLC) entities, wherein the PDCP PDUs contain data bits for transmitting first sorting identities, and the first sorting identities are used for identifying the order of the PDCP PDUs allocated for the different RLCs, and the data bits are newly-added data bits or retained data bits in the corresponding PDCP PDUs.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method and device. Background technique [0002] The LTE (Long Time Evolution, Long Time Evolution) radio interface protocol stack includes a user plane protocol stack and a control plane protocol stack. Among them, the user plane protocol stack includes: physical layer (PHY), media access control layer (Media Access Control, MAC), radio link control (Radio Link Control, RLC) layer and media access control (MAC) layer, packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer. The control plane protocol stack also includes radio resource control (Radio Resource Control, RRC) and non-access stratum on the basis of the above architecture. At the sending end, the service data unit (Service Data Unit, SDU) is received from the upper layer to provide services for the layer, and the protocol data unit (Protocol Data Uni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/863
Inventor 王莹莹孙军帅陈锋黄学艳陈卓易芝玲
Owner CHINA MOBILE COMM LTD RES INST