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TTI switching method, base station and user equipment

A technology of user equipment and base station, which is applied in the field of communication, and can solve problems such as untimely TTI switching, call drop, and large delay

Inactive Publication Date: 2015-04-15
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the process of implementing the technical solutions in the embodiments of the present invention, the inventors found that in the existing TTI switching process, the RNC notifies the UE to perform TTI switching through RRC signaling, and at the same time sends When the base station sends new configuration information, at least 3 signaling interactions between the RNC and the base station are required to complete the TTI handover. Therefore, such a handover mechanism will cause TTI handover to be untimely and have a large delay, especially when starting from 2msTTI When switching to 10msTTI, such a delay will cause E-DCH data loss or even call drop

Method used

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  • TTI switching method, base station and user equipment
  • TTI switching method, base station and user equipment
  • TTI switching method, base station and user equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0120] This embodiment describes the present invention on the UE side, please refer to figure 2 As shown, the embodiment of the present invention provides a TTI handover method, the method includes the following steps:

[0121] Step 101: The user equipment receives first configuration information corresponding to the first TTI and second configuration information corresponding to the second TTI.

[0122] Wherein, the first TTI is specifically 2msTTI, and the second TTI is specifically 10msTTI, that is, both the first TTI and the second TTI are TTIs under the E-DCH.

[0123] But in another embodiment, the first TTI and the second TTI may also belong to TTIs in different protocol versions, for example, the first TTI is 10msTTI in E-DCH, and the second TTI is 20msTTI in R99 DCH.

[0124] In a specific implementation process, step 101 specifically includes: the user equipment receives the first configuration information corresponding to the first TTI and the second configuration...

Embodiment approach

[0141] Wherein, in the first implementation manner of step 105, the user equipment feeds back ACK (Acknowledgment) information or NACK (Negative Acknowledge) information to the base station. If the handover instruction information is received correctly, the user equipment sends ACK information to the base station, and if the handover instruction information is not received correctly, the user equipment sends NACK information to the base station.

[0142] In the second implementation manner of step 105, the user equipment carries a prohibited E-TFCI (E-DCH Transport Format Combination Indicator, enhanced dedicated transport channel format combination indication) in the E-DPCCH to indicate that the user equipment has switched to the target TTI, Wherein, the prohibited E-TFCIs are predefined or configurable. For example, it may be configured through the RNC, such as using the prohibited E-TFCI in the 2ms TTI E-DCH TBS (Transport Block Size, transport block size) table. For anoth...

Embodiment 2

[0160] In this embodiment, the TTI handover method will be described from the base station side, please refer to Figure 4 As shown, the method includes:

[0161] Step 201: The base station receives first configuration information corresponding to the first TTI and second configuration information corresponding to the second TTI.

[0162] In a specific implementation process, step 201 specifically includes: the base station receives the first configuration information corresponding to the first TTI and the second configuration information corresponding to the second TTI sent by the RNC. Wherein, the RNC may send resource configuration information respectively corresponding to the first TTI and the second TTI to the base station through a radio link reconfiguration process.

[0163] Further, step 201 is similar to step 101. The process of sending the first configuration information and the second configuration information to the base station by the RNC may or may not be simult...

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Abstract

Disclosed are a TTI switching method, a base station and a user equipment. The TTI switching method comprises: a user equipment receiving first configuration information corresponding to a first TTI and second configuration information corresponding to a second TTI; the user equipment receiving switching instruction information sent by a base station; the user equipment switching a current TTI to a target TTI corresponding to the switching instruction information, wherein the current TTI is one of the first TTI and the second TTI, and the target TTI is the other of the first TTI and the second TTI; and the user equipment sending data to the base station at the target TTI. By adopting the above-mentioned technical solution, the TTI switching is made to be in time and the time delay of the TTI switching is reduced, thereby avoiding the data loss or call drop.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a TTI handover method, base station and user equipment. Background technique [0002] With the rapid development of communication technology, WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access), as one of the mainstream technologies of the third generation mobile communication system, has been widely researched and applied all over the world. In the Rel-99 version formulated by 3GPP (3rd Generation Partnership Project, the third generation partnership project), a DCH channel is introduced, which is called R99 DCH. The R99 DCH channel has good coverage, but it can only increase a small data rate. The Rel-6 version formulated by 3GPP introduced HSUPA (High-Speed ​​Uplink Packet Access, high-speed uplink packet access) technology, and the transmission channel introduced in HSUPA is E-DCH (Enhanced Dedicated Channel, enhanced uplink)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00
CPCH04W72/12
Inventor 冯莉郑潇潇陈君
Owner HUAWEI TECH CO LTD
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