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Method and appts. for setting pilot signal transmit powers

A pilot signal, transmit power technology, applied in power management, wireless communication, transmission control/equalization, etc., can solve problems such as reducing solution performance

Inactive Publication Date: 2004-08-11
GOOGLE TECH HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of accurate path loss propagation tools and simulation assumptions of operational performance, traffic distribution, etc., which do not track mobility performance in the area well, therefore degrades the performance of this solution

Method used

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  • Method and appts. for setting pilot signal transmit powers
  • Method and appts. for setting pilot signal transmit powers
  • Method and appts. for setting pilot signal transmit powers

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Embodiment Construction

[0022] The following description focuses on an embodiment of a method compliant with current UMTS standardization. However, it is obvious to those skilled in the art that the present invention is not limited thereto.

[0023] Figure 2 illustrates an example of a UMTS cellular communication system. A number of base stations (or "Node Bs" in UMTS terminology) 201, 203 and 205 are connected to a controller (called Radio Network Controller RNC in UMTS). The RNC is connected to a core network 209, which in turn is connected to other RNCs and other networks, including fixed line telephone networks. Each base station supports subscriber units 211,213 and 215 within its respective cell 217,219,221. The calling subscriber unit 211 will establish a communication link 223 with the serving base station 205 . Data from the subscriber unit 211 will be transmitted over this communication link 223 to the base station 205 and routed thereto to its destination, typically through the RNC 207 ...

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PUM

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Abstract

The invention relates to a method and apparatus for setting pilot signal transit powers in a CDMA system. Subscriber units (211,213,215) perform pilot signal measurement measurements and transmits these to a receiver (603). A processor (605) determines a ranking factor for each cell (217, 219,221) at least partly dependent on the pilot signal measurement and a cell overlap condition of the subscriber unit (211, 213, 215) during measurements. The processor (605) ranks the cells (217,219,221) according to the ranking factor, and sets the pilot signal transmit power of at least one cell in response to the ranking of the cells by adjusting a power amplifier (609). The cell overlap condition is determined as the handover state of the subscriber unit (211,213,215) or as the number of cells, which can be received by the subscriber unit (211,213,215) during the measurement The invention is applicable to 3rd generation cellular communication systems.

Description

field of invention [0001] The invention relates to a method and equipment for setting the transmission power of pilot signals in a code division multiple access cellular communication system. Background of the invention [0002] In a cellular communication system, each subscriber unit (typically a mobile station) usually communicates with a fixed base station. Communication from the subscriber unit to the base station is called the uplink, and communication from the base station to the subscriber unit is called the downlink. The entire coverage area of ​​the system is divided into multiple independent cells, and each cell is mainly covered by a base station. These cells typically have an overlapping coverage area geographically with neighboring cells. FIG. 1 illustrates a cellular communication system 100 . In this system, a base station 101 communicates with a plurality of subscriber units 103 over a radio channel 105 . In this cellular system, a base station 101 covers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/005H04B7/26H04J13/00H04W52/32
CPCH04W52/32H04W52/325
Inventor 马修·詹姆斯·狄龙西蒙·布拉什克里斯·墨菲乔纳森·尼尔·霍普金森
Owner GOOGLE TECH HLDG LLC
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