Data transmission method, user equipment and access network equipment

A data transmission method and access network equipment technology, applied in the field of communication, can solve problems such as interruption of data transmission, and achieve the effect of reducing possibility, reducing dependence, and reducing possibility

Active Publication Date: 2021-02-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When RLF occurs in the primary cell, even if there is a serving cell with good signal quality on the primary base station or the secondary base st

Method used

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  • Data transmission method, user equipment and access network equipment
  • Data transmission method, user equipment and access network equipment
  • Data transmission method, user equipment and access network equipment

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0146] figure 1 It is an illustration of the current system of cell aggregation between base stations. Such as figure 1 As shown, the UE uses the cell under the primary base station and the cell under the secondary base station to perform uplink and downlink communication at the same time. Wherein, the serving base station where the PCell is located is the primary base station, and one of the one or more SCells under the secondary base station is the PSCell. The primary base station communicates with the Mobility Management Entity (MME) based on the S1-MME interface protocol, the primary base station communicates with the secondary base station based on the X2 interface protocol, and the primary base station, the secondary base station communicates with the UE based on the Uu interface.

[0147] Generally speaking, in the cell aggregation scenario between base stations, RLF mainly includes the following four scenarios: 1. The physical layer of the UE detects that RLF occurs ...

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PUM

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Abstract

An embodiment of the present invention provides a data transmission method, user equipment, and access network equipment. The UE transmits air interface data to the access network equipment through a service cell set including at least two core service cells that can independently serve the UE to transmit data. , only when it is detected that none of the core serving cells in the serving cell set is available, the RRC connection re-establishment process is initiated to the access network equipment, and data transmission is performed by using the available serving cells as much as possible, that is, as long as there are core serving cells If cells are available, use these available core serving cells for data transmission, thereby reducing the dependence of data transmission between serving cells, minimizing the possibility of data transmission interruption, and improving the robustness of data transmission.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a data transmission method, user equipment, and access network equipment. Background technique [0002] In order to maintain the long-term competitive advantage of the 3rd Generation Partnership Project (3GPP) and further improve the spectral efficiency and user throughput of the system, the evolved LTE (LTE-Advanced, LTE-A) introduces carrier aggregation ( Carrier Aggregation, CA) technology. In this technology, a user equipment (User Equipment, UE) simultaneously uses multiple cells for uplink and downlink communication, which increases the data transmission speed. Among the multiple cells, one is a primary cell (Primary Cell, PCell), and the others are secondary cells (Secondary Cell, SCell). [0003] In general, CA can be divided into cell aggregation within a base station, cell aggregation between base stations, and the like. Intra-base station cell ...

Claims

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Application Information

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IPC IPC(8): H04W24/00
CPCH04W36/0069H04W36/305H04L5/001H04W72/21H04W76/19H04W76/18H04W76/11H04W76/27H04W88/16
Inventor 张宏平黄曲芳严乐戴明增
Owner HUAWEI TECH CO LTD
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