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Data transmission method and device

A technology of transmission method and equipment, applied in the field of communication

Active Publication Date: 2015-07-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the existing technology cannot realize data transmission between UE and WLAN and 3GPP system through WLAN at the same time

Method used

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  • Data transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164] [Embodiment 1] Downlink data transmission process

[0165] Scenario: The base station transmits the PDCP PDU of the downlink separated bearer to the UE through the WLAN link, and the PDCP entity corresponding to the UE receives the PDCP PDU.

[0166] The downlink data transmission process includes:

[0167] Step 1: The base station determines the PDCP PDU that needs to be transmitted through the WLAN side on the separated bearer according to its own strategy, and then applies it to the General Packet Radio Service (GPRS) tunneling protocol (GTP) / user data The report protocol (User Datagram Protocol, UDP) / Internet Protocol (Internet Protocol, IP) encapsulation is sent to the WAF via the GTP-U tunnel through the Xw-U interface between the base station and the WAF.

[0168] Among them, the GTP / UDP / IP encapsulation, that is, GTP tunnel encapsulation, belongs to the existing method, that is, adding headers layer by layer.

[0169] Step 2: The WAF receives the PDCP PDU (encapsulated b...

Embodiment 2

[0173] [Embodiment 2] Uplink data transmission process

[0174] Scenario: The UE transmits the PDCP PDU of the uplink separated bearer to the base station through the WLAN link, and the PDCP entity corresponding to the base station receives it.

[0175] The uplink data transmission process (PDCP separation bearer) includes:

[0176] Step 1: The PDCP layer on the UE side sends the PDCP PDU that determines the separate bearer to its PWAL layer for processing. The PWAL determines its LCID for the corresponding PDCP entity, adds the LCID field to the front of the PDCP PDU as the payload, and encapsulates it in a new In the IP packet, the destination address of the IP packet is the IP address of the WAF on the WLAN side or an agreed specific IP address, and the source address of the IP packet is the IP address of the UE on the WLAN side. The IP packet is sent to WAF.

[0177] Step 2: WAF receives the IP packet through the normal WLAN data receiving process ((the existing process)) (or via...

Embodiment 3

[0180] [Example 3] Acquisition of WAF IP address

[0181] Scenario: WAF notifies the base station of its own IP address on the WLAN side when the initial Xw-C signaling channel is established, and the base station notifies the UE of the WAF's IP address on the WLAN side through a dedicated RRC message when configuring a separate bearer for the UE.

[0182] The signaling process for the UE to obtain the IP address of the WAF on the WLAN side includes:

[0183] Step 1: The base station and WAF communicate with each other through signaling to establish an Xw-C signaling channel. WAF informs the base station of its own IP address on the WLAN side as a parameter, and the base station saves it.

[0184] Step 2: The base station decides to activate the WLAN side aggregation transmission function for the UE, and instructs the UE to access the WLAN through RRC signaling.

[0185] Step 3: The UE accesses the corresponding WLAN according to the instruction of the base station, and reports the acce...

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Abstract

The invention discloses a data transmission method and device and aims to allow data transmission with a 3GPP (the 3rd generation partnership project) through an WLAN (wide local area network) during data transmission between UE (user equipment) and the WLAN, thus improving UE throughput rate, distribution efficiency and system deployment flexibility. The method includes the steps: the WLAN receives a GTP (GPRS tunneling protocol) packet containing PDCP (packet data convergence protocol) PDU (packet data unit), from a 3GPP system side base station; the WLAN packages the PDCP PDU in the GTP packet into an IP (internet protocol) packet transmitted to the UE.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and equipment. Background technique [0002] With the growth of user demand and the development of communication technology, more and more wireless communication technologies and related networks have emerged, such as 2G / 3G / 4G mobile communication technologies and networks that can provide wide coverage, and wireless local area networks that can provide hotspot coverage (Wireless LAN, WLAN) network. Therefore, a large number of scenarios where different communication networks coexist, such as 2G / 3G / 4G networks and WLAN coexistence scenarios have also appeared. In these network coexistence scenarios, it needs to be studied to control the long-term evolution (Long Term Evolution, LTE) bearer of the UE or the flexible conversion and concurrency of data between the LTE network and the WLAN. [0003] The Evolved Packet System (EPS) is a system that...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L29/12
Inventor 夏欣梁靖
Owner DATANG MOBILE COMM EQUIP CO LTD