Method and system for determining uplink/downlink path-loss difference

A path loss, downlink technology, used in the field of communication systems

Inactive Publication Date: 2006-12-27
OPTIS WIRELESS TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the problem with the conventional approach is that for a UE, there is a large difference in up

Method used

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  • Method and system for determining uplink/downlink path-loss difference
  • Method and system for determining uplink/downlink path-loss difference
  • Method and system for determining uplink/downlink path-loss difference

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Embodiment Construction

[0026] To facilitate understanding of the exemplary embodiments, the various aspects will be described in terms of sequences of actions that can be performed by elements of a computer system. For example, it should be appreciated that in various embodiments, the logic may be implemented by a dedicated circuit or circuitry (e.g., discrete logic gates interconnected to perform a dedicated function), by a program executed by one or more processors. Various actions are performed by program instructions, or by a combination of both.

[0027] Additionally, any computer-readable text that may be used by or in connection with an instruction execution system, device, or apparatus (e.g., a computer-based system, a processor containing a system, or other system that can retrieve instructions from a medium and execute them) These action sequences are realized in the medium.

[0028] As used herein, a "computer-readable medium" may be any means that contains, stores, communicates, propaga...

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Abstract

Methods and apparatus are described for estimating a path-loss difference between uplink and downlink communications at a first node communicating with a second node in a communication system. A quantity of access request preambles transmitted by the first node to the second node before an acknowledgement from the second node of successful receipt of a preamble is received at the first node is determined. A difference between an uplink path-loss attributed to communications from the first node to the second node and a downlink path-loss attributed to communications to the first node from the second node is estimated based on the transmitted preamble quantity determination. Once the path-loss difference is estimated, the estimate can be used for many purposes, such as to determine a transmission power of the first node.

Description

technical field [0001] The present invention relates to communication systems. More specifically, the present invention relates to estimating path loss in a communication system. Background technique [0002] Digital communication systems include: Time Division Multiple Access (TDMA) systems, such as cellular radiotelephone systems conforming to the GSM telecommunications standard and enhancements thereof (eg, GSM / EDGE); and Code Division Multiple Access (CDMA) systems, such as conforming to IS-95 , cdma2000, and WCDMA telecommunication standard cellular wireless telephone system. Digital communication systems also include "hybrid" TDMA and CDMA systems, such as cellular radiotelephone systems that comply with the Universal Mobile Telecommunications System (UMTS) A third generation (3G) mobile system developed within the framework of IMT-2000 of the (ITU). The 3rd Generation Partnership Project (3GPP) promulgates the UMTS standard. For simplicity, this application is dir...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04B17/00H04W52/14H04W52/22H04W52/24H04W52/50
CPCH04W52/14H04B17/0045H04W52/246H04W52/242H04W52/50H04W52/228H04W52/245H04B17/327H04W74/08
Inventor 布·伯恩哈德约纳斯·奥尔松迈克尔·齐恩
Owner OPTIS WIRELESS TECH LLC
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