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Method for controlling forward link power independent of reverse link power control

A forward link and reverse link technology, which is applied in transmission control/equalization, power management, radio/inductive link selection and arrangement, etc., can solve the problem of forward link deterioration and inability to perform forward power control and other issues to achieve the effect of preventing further deterioration of the state

Inactive Publication Date: 2007-05-30
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, the BTS cannot perform forward power control, and as a result, the forward link becomes bad

Method used

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  • Method for controlling forward link power independent of reverse link power control
  • Method for controlling forward link power independent of reverse link power control
  • Method for controlling forward link power independent of reverse link power control

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Embodiment Construction

[0037] The forward link and reverse link of the CDMA system are closely related to each other. If the quality of any link is not good, it may have a negative impact on the other link.

[0038] Referring to FIG. 4, in step 410, the MS transmits a reverse traffic frame including an EIB set to 1 to the BTS. Because the reverse link is bad, the BTS cannot receive the reverse traffic frame correctly. That is, the BTS in turn receives bad frames with errors and reports the bad frames to the BSC. In step 420, after receiving the bad frame from the BTS, the BSC determines that the reverse link is faulty, and transmits a forward traffic frame including reverse power control bits to the MS through the BTS. However, if the forward link fails, the MS cannot receive the forward traffic frame correctly, and as a result, the reverse link cannot be restored. The step 430 is provided to indicate that the MS, the BTS, and the BSC are overloaded due to the repeated message transmission of the steps ...

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Abstract

A method for controlling the forward link power independent of reverse link power control is described. In a mobile communication system where the reverse link is degraded thereby preventing the forward link status to be sent to the base station, the base station estimates the forward link power using power control information received via the reverse link prior to the reverse link being degraded. The forward link is improved using the power control information and once improved the reverse link is improved via the improved forward link.

Description

Technical field [0001] The present invention relates to a wireless communication system. In particular, the present invention relates to a method for controlling forward link power independently of reverse link power control. Background technique [0002] In a code division multiple access (CDMA) cellular system, a large number of mobile stations (MS) use the same frequency at the same time. Therefore, the signal power of one mobile station has a great influence on the signal power of other mobile stations. [0003] Figure 1 illustrates the receiving sensitivity of a mobile station as a function of the distance between the BTS and the mobile station when the base transceiver station (BTS) is transmitting at a constant signal strength. In Figure 1, "A" represents the average path loss, which is determined by the geographic pattern and the distance between the BTS and the mobile station. [0004] Those skilled in the art can easily understand that the path loss is proportional to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04Q7/20H04B7/00H04B7/26H04W52/14H04W52/16H04W52/20H04W52/22H04W52/24H04W52/44H04W52/48H04W52/50
CPCH04W52/44H04W52/16H04W52/143H04W52/146H04W52/48H04W52/50H04W52/20Y02B60/50H04W52/24H04W52/228H04B7/26
Inventor 姜美贞
Owner SAMSUNG ELECTRONICS CO LTD