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Power control apparatus and method for inter frequency handoff in cdma communication system

A technology of power control and handover, which is applied in the direction of code division multiplexing system, multiplexing communication, communication between multiple stations, etc., and can solve the problem that regular power control cannot be carried out.

Inactive Publication Date: 2001-06-20
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, although the frame does not contain an interrupted transmission period, there is a portion in the previous frame where regular power control cannot be performed

Method used

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  • Power control apparatus and method for inter frequency handoff in cdma communication system
  • Power control apparatus and method for inter frequency handoff in cdma communication system
  • Power control apparatus and method for inter frequency handoff in cdma communication system

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Embodiment Construction

[0027] Detailed Description of Preferred Embodiments

[0028] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the characteristics of the present invention in unnecessary detail.

[0029] In the power control method during the initial stage for inter-frequency handover according to the embodiment of the present invention, the mobile station increases the transmission power at the start point of the frame by an amount equal to the transmission power lost at the transmission cut-off period of the frame. magnitude in order to compensate for the loss of transmit power due to interruption of data transmission. At the same time, the mobile station changes the power control threshold of the base station so that regular power control can be performed. Since this power control ...

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PUM

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Abstract

Disclosed is a power control method for a mobile station which has at least one frame including a data transmission duration where data is transmitted at a first frequency, and a data transmission-off duration where a second frequency is searched to perform an inter-frequency handoff to the second frequency. The transmission power at the data transmission duration is increased to compensate for the loss of transmission power during the data transmission-off duration. In the method, a base station sets a power control threshold depending on the length of the data transmission-off duration. The base station receives power-increased data and compares the received power of the data signal with the power control threshold. The base station generates a power-up command when the power control threshold is higher than the receiving power, and generates a power-down command when the power control threshold is lower than the receiving power.

Description

Background of the invention [0001] 1. field of invention [0002] The present invention generally relates to a power control device and method for a mobile communication system, and more particularly to a device and method for power control during inter-frequency hard handover. [0003] 2. Related technical description [0004] Generally speaking, many mobile communication systems utilize Code Division Multiple Access (CDMA) techniques. For power control in the reverse link of a CDMA system, the base station measures the strength of the pilot signal transmitted from the mobile station and compares the measured value with a predetermined power control threshold. When the measured pilot signal strength is lower than the threshold, the base station generates a power-up command, otherwise, when the measured pilot signal strength is higher than the threshold, the base station generates a power-down command. The base station sends power control commands back to the mobile stati...

Claims

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Application Information

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IPC IPC(8): H04W52/04H04B1/04H04B7/005H04B7/216H04B7/26H04J13/00H04W36/08H04W52/12H04W52/28H04W52/36H04W52/44H04W76/02
CPCH04W52/12H04W52/283H04W52/288H04W52/44H04W36/0094H04W52/362H04W52/40H04W52/08H04W36/06H04W88/08
Inventor 朴昌洙安宰民金宰烈姜熙原
Owner SAMSUNG ELECTRONICS CO LTD
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