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Transmit power control method and device for base stations using multiple carrier power amplifiers (mcpa)

A power amplifier, multi-carrier technology, applied in the direction of transmission control/equalization, power management, multi-frequency code system, etc., can solve the problem that BSC cannot change power reservation, excessive and so on

Active Publication Date: 2014-07-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For a Global System for Mobile Communications (GSM) based MCPA RBS, the main problem is that the power requirements are typically largely determined by the Base Station Controller (BSC) for each MCPA carrier separately
At this time, the BSC cannot change the power reservation
Thus, there may be excessive power requirements within a particular time slot (TS)

Method used

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  • Transmit power control method and device for base stations using multiple carrier power amplifiers (mcpa)
  • Transmit power control method and device for base stations using multiple carrier power amplifiers (mcpa)
  • Transmit power control method and device for base stations using multiple carrier power amplifiers (mcpa)

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Embodiment Construction

[0017] The invention will now be described in more detail as a non-limiting example. exist figure 2 In , a cellular radio system 100 (such as a GSM system) is shown. figure 2 BTS 101 including power reduction module 107 is shown. figure 2 Also shown is one of possibly many mobile stations (MS) 103 in communication with the BTS 101 . Furthermore, a base station controller (BSC) 105 is shown in connection with the BTS.

[0018] The BTS 101 including the power reducer 107 is adapted to detect peaking effects due to the addition of multiple signals to be transmitted by the BTS using the same or different modulation techniques.

[0019] Once the estimated peak power exceeds some predetermined value (eg maximum average power plus peak headroom), a power backoff is initiated for one or more of the included signals transmitted by the BTS.

[0020] The power reduction can be applied in different ways for different signals transmitted by the BTS. According to one embodiment, pow...

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Abstract

The present invention provides a method and a device for controlling output power in a base transceiver station adapted to use multi-carrier power amplifiers for transmitting signals over an air interface, in said method and device, The power of a signal to be transmitted in an upcoming transmission slot is increased and the power is compared to at least one threshold. If the threshold is exceeded, the output power is reduced. By implementing the power reduction scheme described above, the risk of peak power effects is minimized while aggressive sizing is possible. This is possible because the power will not be backed off unless actually needed.

Description

technical field [0001] The present invention relates to a method and a device for controlling power. Background technique [0002] In mobile networks, when using Multi-Carrier Power Amplifiers (MCPA) Radio Base Stations (RBS), there is a risk that the available power is insufficient to transmit all information on a certain frequency during a certain period of time. [0003] During shorter time periods (peaks) there is a certain margin against power overload. However, if this margin is exceeded, the output signal will be distorted, causing intermodulation (IM) products that affect transmission on that particular frequency itself as well as adjacent frequencies. [0004] Various schemes exist to solve this problem, with more or less impact on one or more users of the MCPA. Furthermore, there are various ways to minimize the risk of power congestion through power reduction, prediction and spreading users to different time slots and frequencies / MCPA. [0005] exist figure 1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04W52/34
CPCH04W52/30H04L27/28H04W52/281H04W52/367H04W52/52H04W52/143Y02B60/50
Inventor 索菲娅·斯韦德瓦托尔斯滕·林德贝尼·雷纳特森
Owner TELEFON AB LM ERICSSON (PUBL)