Mobile communication terminal and method of controlling transmission power

A technology for mobile communication terminals and transmission power, applied in the field of mobile communication terminals, can solve the problems of reduced channel reception characteristics, serious problems, and the inability of base stations to receive information.

Inactive Publication Date: 2005-05-25
SONY ERICSSON MOBILE COMM AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0041] Accordingly, the reception characteristics of all channels at the base station are degraded and, in the worst case, the base station cannot correctly receive information through all channels
If the data cannot be retransmitted or corrected, the problem is serious

Method used

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  • Mobile communication terminal and method of controlling transmission power
  • Mobile communication terminal and method of controlling transmission power
  • Mobile communication terminal and method of controlling transmission power

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0139] As described above, according to the first embodiment of the present invention, if the transmission power required by the base station exceeds the maximum transmission power P of the mobile phone terminal max, then the priority channel selector 18 determines the priority order of DPDCH, DPCCH, and HS-DPCCH, and the transmission power controller 17 changes the power allocation ratio among them according to their priority order. That is, the priority channel selector 18 and the transmission power controller 17 control the transmission power of the priority channel according to the requirements of the base station on the one hand, and control the transmission power of the non-priority channel so that the total transmission power of the channels does not exceed the maximum transmission power. Therefore, a signal can be transmitted without degrading the characteristic of the priority channel at the base station on the receiving side.

no. 1 example

[0140] Furthermore, according to the first embodiment of the present invention, if HS-DPCCH is a priority channel and ACK is being transmitted through HS-DPCCH, unnecessary retransmissions from the base station can be avoided. If HS-DPCCH is the priority channel and CQI is being transmitted via HS-DPCCH, accurate information about reception quality can be transmitted to the base station; accordingly, downlink high data transmission rate reduction for HSDPA traffic is avoided.

[0141] [Structure of the mobile phone terminal of the second embodiment]

[0142] Figure 4 A structural example of a portable telephone terminal according to a second embodiment of the present invention is shown. Figure 4 In , only main components are shown, and other components such as filters are omitted. and figure 1 The parts in the same Figure 4 Parts in the figure 1 Like parts in the same reference number, and for Figure 4 Descriptions of the same parts as in are omitted.

[0143] and...

no. 2 example

[0159] As described above, according to the second embodiment of the present invention, if the transmission power required by the base station exceeds the maximum transmission power P of the mobile phone terminal max , then the priority channel selector 38 determines the priority order of DPDCH and HS-DPCCH, and the transmission power controller 17 changes the power allocation ratio between them according to their priority order. That is, the priority channel selector 38 and the transmission power controller 17 control the transmission power of the priority channel according to the requirements of the base station on the one hand, and control the transmission power of the non-priority channel so that the total transmission power of the channels does not exceed the maximum transmission power. Therefore, a signal can be transmitted without degrading the characteristic of the priority channel at the base station on the receiving side.

[0160] In the case of the second embodiment...

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Abstract

The mobile communication terminal of the present invention includes: an amplitude adjuster 3, which adjusts the amplitude of signals of DPDCH, DPCCH, and HS-DPCCH; a transmission power controller 17, which controls the power allocation ratio for adjusting the transmission power of each transmission channel; And a priority channel selector 18, which selects a priority channel from among the transmission channels. If the total transmission power of each transmission channel will exceed the maximum transmission power, the transmission power controller 17 adjusts the transmission power of the priority transmission channel to the power level required by the base station on the one hand, and adjusts the transmission power of the non-priority channel to the power level required by the base station on the other hand. The power allocation ratio among the respective transmission channels is determined by limiting the total transmission power to the maximum transmission power. Accordingly, even if the transmission power required by the base station exceeds the maximum transmission power of the mobile communication terminal, the base station can correctly receive information.

Description

technical field [0001] The present invention relates to a mobile communication terminal and a method for controlling the transmission power of a multiplexed wireless communication system that simultaneously transmits different pieces of information through two or more channels. Background technique [0002] Recently in the field of mobile communication, a multiplexing wireless communication system that simultaneously transmits different pieces of information through two or more channels has been proposed. [0003] One such system is the 3GPP (3rd Generation Partnership Project) W-CDMA (Wideband Code Division Multiple Access) system. [0004] 3GPP additionally defines an HSDPA (High Speed ​​Downlink Packet Access) system that increases a downlink data transmission rate from a base station to a mobile communication terminal. HSDPA and information about the quality of received signals monitored by mobile communication terminals have made adaptive modulation and adaptive coding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/005
CPCH04W52/281H04W52/325H04W52/346H04W52/367H04W52/54
Inventor 大木登伊东克俊
Owner SONY ERICSSON MOBILE COMM AB
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