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Switching method, mobile terminal and base station

A technology for mobile terminals and serving base stations, applied in wireless communication, electrical components, etc., can solve problems such as interruption of user data transmission, call drop, affecting user throughput and delay, and achieve the goal of reducing handover interruption time and improving handover performance Effect

Active Publication Date: 2010-11-10
NTT DOCOMO INC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Obviously, the switching interruption time will cause the interruption of user data transmission, affect the user throughput and delay, and more seriously may cause call drop

Method used

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  • Switching method, mobile terminal and base station
  • Switching method, mobile terminal and base station
  • Switching method, mobile terminal and base station

Examples

Experimental program
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Embodiment Construction

[0066] like figure 1 As shown in the handover process in the LTE system, the handover interruption time usually includes the time spent performing steps 108-110 in the contention-based random access mode, while for the non-contention random access mode, the handover interruption time usually only includes The time spent performing step 108. Here, the non-contention random access method means that the target base station assigns a dedicated random access preamble to the mobile terminal. At this time, after step 108 is performed, the uplink and downlink data transmission between the mobile terminal and the target base station can be It started. Moreover, due to the dedicated random access preamble, the random access will not collide and can be successful once, without retransmitting the random access preamble. Therefore, in this manner, the handover interruption time generally includes the time taken to perform step 108 . The contention-based random access method means that t...

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Abstract

The invention discloses a switching method, which comprises that: when sending a switching instruction to a mobile terminal, a service base station continues to allocate an uplink transmission resource and a downlink transmission resource for the mobile terminal, so that after receiving the switching instruction, the mobile terminal can continue to maintain the data transmission with the service base station, and simultaneously execute the random access process to a target base station so as to acquire the uplink synchronization information of the target base station. The invention also discloses a mobile terminal and a base station. Through the switching method of the invention, the switching interruption time in the switching process can be shortened greatly, and the switching performance is improved.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a handover method when a user moves from one cell to another in connection mode, and a mobile terminal and a base station participating in the handover. Background technique [0002] Cellular mobile phones have brought great convenience to people's communication. The second generation Global System for Mobile Communication (GSM) adopts digital communication technology to further improve the call quality of mobile communication. As an important organization in the mobile communication field, the 3rd Generation Partnership Project (3GPP) has greatly promoted the standardization of the third generation mobile communication technology (The Third Generation, 3G), and formulated a series of broadband codes including Communication systems including Wide Code Division Multiple Access (WCDMA), High Speed ​​Downlink Packet Access (HSDPA), High Speed ​​Uplink Packet Access (HSUPA), etc. s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W88/02H04W88/08
CPCH04W36/02
Inventor 李明菊佘小明陈岚
Owner NTT DOCOMO INC
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