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A tti handover 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 E-DCH data loss, untimely TTI switching, and large delay

Active Publication Date: 2019-06-28
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 synchronous reconfiguration process, the RNC notifies the UE to perform TTI switching through RRC signaling, and at the same time through the radio link reconfiguration process Sending new configuration information to the base station requires at least 3 signaling interactions between the RNC and the base station to complete the TTI handover. When switching from 2msTTI to 10msTTI, such a delay will cause E-DCH data loss or even call drop
For the asynchronous reconfiguration method, the base station cannot accurately determine the timing when the UE switches to the target TTI. After receiving the reconfiguration signaling sent by the RNC, it needs to try to analyze according to the two TTI types before and after the switch, so the hardware resources of the base station are wasted.

Method used

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  • A tti handover method, base station and user equipment
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  • A tti handover method, base station and user equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0215] This embodiment describes the present invention from the UE side, please refer to figure 2 As shown, an embodiment of the present invention provides a TTI switching method, which includes the following steps:

[0216] Step 101: The user equipment receives first configuration information corresponding to a first TTI and second configuration information corresponding to a second TTI.

[0217] Wherein, the first TTI is specifically a 2ms TTI, and the second TTI is specifically a 10ms TTI, that is, both the first TTI and the second TTI are TTIs under the E-DCH.

[0218] However, 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 the 10 ms TTI in the E-DCH, and the second TTI is the 20 ms TTI in the R99DCH.

[0219] In a specific implementation process, step 101 is specifically: the user equipment receives the first configuration information corresponding to the first TTI and the second config...

Embodiment approach

[0237] In the first implementation manner of step 105, the user equipment feeds back ACK (Acknowledgment positive confirmation) information or NACK (Negative Acknowledge negative confirmation) information to the base station. If the handover indication information is correctly received, the user equipment sends ACK information to the base station. If the handover indication information is not received correctly, the user equipment sends NACK information to the base station.

[0238] 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 indicator) in the E-DPCCH to indicate that the user equipment has received the handover indication information, Among them, the prohibited E-TFCI is predefined or configurable or reserved. For example, it can be configured through the RNC, such as using the prohibited E-TFCI in the 2ms TTI E-DCH TBS (Trans...

Embodiment 2

[0263] In this embodiment, the TTI switching method will be described from the base station side, please refer to Figure 4 As shown, the method includes:

[0264] Step 201: The base station receives first configuration information corresponding to the first TTI and second configuration information corresponding to the second TTI.

[0265] In a specific implementation process, step 201 is specifically: 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 the resource configuration information corresponding to the first TTI and the second TTI to the base station through the radio link reconfiguration process.

[0266] Further, step 201 is similar to step 101. The process of sending the first configuration information and the second configuration information by the RNC to the base station may or may not be simultaneous. For the spec...

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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 studied and applied worldwide. In the Rel-99 version formulated by 3GPP (3rd Generation Partnership Project), a DCH channel, called R99DCH, is introduced. The R99DCH channel has good coverage, but can only increase a smaller data rate. In the Rel-6 version formulated by 3GPP, HSUPA (High-Speed ​​Uplink Packet Access) technology is introduced, and the transmission channel introduced in HSUPA is E-DCH (Enhanced Dedicated Channel, uplink enhancement). E-DCH includes two transmission time interval (Transmission Time Interval, TTI) types, 2ms ...

Claims

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Application Information

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