Method and a device for determiming if a handover has to be excuted for a terminal

A terminal and equipment technology, applied in connection management, electrical components, wireless communication, etc., can solve the problems of base station idle cycle incompatibility, half-duplex terminals cannot handle, etc., and achieve the effect of improving management quality

Inactive Publication Date: 2009-08-19
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, during communication, a handover procedure may be requested to the base station, and the half-duplex terminal cannot be handled by the base station because the round-trip delay between the base station and the terminal is not compatible with the idle period of the base station

Method used

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  • Method and a device for determiming if a handover has to be excuted for a terminal
  • Method and a device for determiming if a handover has to be excuted for a terminal
  • Method and a device for determiming if a handover has to be excuted for a terminal

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Embodiment Construction

[0053] figure 1 is a diagram representing a wireless cellular telecommunication network architecture implementing the present invention;

[0054] Wireless cellular telecommunication networks may use time division duplex (TDD) or half-duplex frequency division duplex.

[0055] In TDD mode, signals transmitted in uplink and downlink channels are duplexed in different subframes, also called time slots, within the same frequency band.

[0056] In full-duplex FDD mode, the signals transmitted in the uplink and downlink channels are duplexed in the same subframe, also known as a time slot, in different frequency bands.

[0057] In half-duplex FDD mode, from the half-duplex terminal side, the signals transmitted in the uplink and downlink channels are duplexed in different subframes, also called time slots, in different frequency bands Inside. It should be noted that in such cases, the base station may be able to use the full-duplex frequency when communicating with several half-d...

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Abstract

The present invention concerns a method for determining in a wireless cellular telecommunication network in which a half duplex terminal is handled by a first base station, if a second base station is able to handle the half-duplex terminal, characterized in that the method comprises the steps, executed by the half duplex terminal, of: - receiving signals from the first base station and from the second base station, - determining quality measurements for the signals, - determining the time period between the reception of the signal transferred by the first base station and the reception of the signal transferred by the second base station, - determining if the second base station is able to handle the half-duplex terminal according to at least the quality measurements and the time period.

Description

technical field [0001] The present invention generally relates to a method and apparatus for determining whether a handover has to be performed for a terminal in a wireless cellular telecommunications network. Background technique [0002] In the field of wireless cellular telecommunication networks, each terminal is periodically assigned a set of candidate base stations, which could theoretically handle communications. These candidate base stations may be, for example, base stations around the base station currently handling the terminal. Each terminal measures the signal quality of the candidate measurement channels of different candidate base stations periodically or when required (ie after a specific event). The terminal then reports these measurements to the base station currently handling the terminal, which can decide whether to start the handover procedure. [0003] Alternatively, no set of candidate base stations is assigned to the terminal. Each terminal perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/30
CPCH04W36/26H04W56/00H04W56/0045H04W76/005H04W76/45
Inventor L·布鲁内尔A·莫拉德D·莫蒂尔
Owner MITSUBISHI ELECTRIC CORP
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