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Data transmission method and system

A data sending method and data packet technology, applied in the field of communication, can solve the problem that the wireless communication system cannot meet the higher delay and reliability requirements of new business applications

Active Publication Date: 2016-06-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the existing wireless communication system cannot meet the higher delay and reliability requirements brought by new business applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0187] Embodiment 1: PDCP PDU redundant transmission under carrier aggregation (CA).

[0188] In the carrier aggregation scenario, multiple carriers provide wireless transmission for the same UE, and each carrier corresponds to a cell. see Figure 7 , the following is an example where different cells used for carrier aggregation belong to one base station.

[0189] The downlink transmission in this embodiment includes:

[0190] Step 1: The base station receives the data packet from the upper layer, allocates the PDCPSN, organizes the PDCP PDU, and maintains a PDCPdiscardtimer for each PDCP PDU;

[0191] Step 2: The base station maps the same PDCP PDU to cell 1 and cell 2 for simultaneous transmission;

[0192] Step 3: The UE receives PDCP PDUs from cell 1 and cell 2 respectively, performs duplicate detection and sorting according to the PDCP SN of the received PDCP PDUs, and submits the correctly received PDCP PDUs to the upper layer.

[0193] Step 4: UE generates a header...

Embodiment 2

[0199] Embodiment 2: Redundant transmission of PDCP PDUs under the dual connection 1A architecture.

[0200] Dual connectivity means that the UE maintains connection with two cells, generally a macro cell (corresponding to MeNB) and a small cell (corresponding to SeNB). Dual connectivity 1A architecture such as Figure 8 shown.

[0201] The downlink transmission in this embodiment includes:

[0202] Step 1: One of the base stations, such as the macro cell base station (MeNB) or the centralized processing entity receives the data packet from the upper layer, allocates the PDCPSN, organizes the PDCP PDU, and maintains a PDCPdiscardtimer for each PDCP PDU;

[0203] Step 2: PDCP PDU organizes the base station, for example, the macro cell base station (MeNB) forwards the organized PDCP PDU or (PDCPSN+ data packet) to another base station, and the macro cell base station corresponds to the small cell base station (SeNB), or

[0204] The centralized processing entity sends the org...

Embodiment 3

[0213] Embodiment 3: PDCP PDU redundant transmission under the dual connection 3C architecture.

[0214] see Figure 9 , under the dual connectivity 3C architecture, the PDCP layer is only located in the MeNB, which is more convenient for the multi-channel transmission operation in the embodiment of the present invention.

[0215] The downlink transmission in this embodiment includes:

[0216] Step 1: The macro cell base station (MeNB) receives the data packet from the upper layer, allocates the PDCPSN, organizes the PDCP PDU, and maintains a PDCPdiscardtimer for each PDCP PDU;

[0217] Step 2: The macro cell base station (MeNB) maps the organized PDCP PDU to two PDCP layer entities;

[0218] Step 3: The macro cell and the small cell transmit the organized PDCP PDU at the same time and start the PDCP discard timer, and the PDCP layer entity of the small cell needs to send the PDCP PDU to the lower layer of the small cell;

[0219] Step 4: The UE receives PDCP PDUs from the ...

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Abstract

The invention discloses a data transmission method and system, which are used to reduce the time delay of data transmission and improve the reliability of data transmission. A data sending method provided by the present invention includes: determining the air interface packet data unit PDU containing the same service data packet that needs to be sent through multiple wireless links; sending the air interface PDU through each of the wireless links to A receiving end, wherein the receiving end corresponds to the plurality of wireless links.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and system. Background technique [0002] With the development of the mobile Internet and the Internet of Things, the demand for business data volume has exploded. Massive device connections and diversified Internet of Things services have also brought new technical challenges to mobile communications. The delay and reliability of existing communication systems are designed for human-to-human communication. In terms of delay and reliability, future wireless mobile communication systems must not only continue to better meet the communication needs of human users, but also meet the needs of human users. Machine Type Communication (MTC) communication requires real-time and high reliability to promote new applications in industrial fields such as traffic safety, traffic efficiency, smart grid, and e-health, so that the concept of smart societ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06
Inventor 谌丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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