Mobile communication terminal and method of controlling transmission power

• US 7,403,791 B2
• Filed: 10/22/2004
• Issued: 07/22/2008
• Est. Priority Date: 11/11/2003
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Ericsson Mobile Communications Japan Incorporated (Sony Group Corp.)
• Inventors: Itoh, Katsutoshi, Oki, Noboru
• Primary Examiner(s): Anderson; Matthew
• Assistant Examiner(s): Angelica; Perez M
• Application Number:
  US10/969,977
• Publication Number:
  US 20050111391A1
• Time in Patent Office: 1,369 Days
• Field of Search: 455/522
• US Class Current: 455/522
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

The mobile communication terminal of the present invention comprises an amplitude regulator 3 regulating the amplitudes of signals of the DPDCH, DPCCH, and HS-DPCCH, a transmission-power controller 17 controlling the power-distribution ratio for the adjustment of transmission power of the individual transmission channels, and a priority-channel selector 18 choosing a priority channel from among the individual transmission channels. If the total transmission power of the individual transmission channels is going to exceed the maximum transmission power, the transmission-power controller 17 determines the power-distribution ratio among the individual transmission channels by adjusting the transmission power of the priority transmission channel to a power level demanded by a base station on the one hand and adjusting the transmission power of the non-priority channel so as to confine the total transmission power to the maximum transmission power on the other hand. Accordingly, the base station can receive information correctly even if the transmission power demanded by the base station is beyond the maximum transmission power of the mobile communication terminal.

Claims

1. A mobile communication terminal comprising:

a signal-sending/receiving unit capable of sending and receiving multiplexed signals through a plurality of channels,

a transmission-power adjuster to adjust transmission power of the individual channels,

a transmission-power controller to control a power-distribution ratio for adjustment of transmission power of the individual channels by said transmission-power adjuster,

an information holder holding the maximum transmission power of the mobile communication terminal, and

a priority-setting unit to set order of priority of the individual channels by using prescribed materials for determining the order of priority;

wherein said transmission-power controller compares the transmission power demanded by a communication terminal at the other end through said signal-sending/receiving unit and the maximum transmission power held by said information holder and controls the transmission power of individual channels according to the transmission power demanded by the communication device at the other end, and

wherein, if the total transmission power of the individual channels is going to exceed the maximum transmission power, said transmission-power controller determines the power-distribution ratio among the channels so that transmission power of a channel given priority by said priority-setting unit is adjusted to a power level demanded by the communication device at the other end on the one hand and transmission power of a channel or channels not given priority by said priority-setting unit is adjusted so as to confine total transmission power to the maximum transmission power on the other hand.

2. A mobile communication terminal as set forth in claim 1;

wherein the plurality of channels through which multiplexed signals are sent and received includes at least

a data-transmitting channel,

a control information-transmitting channel for transmission of control information corresponding to said data-transmitting channel, and

a channel being different from said data-transmitting channel for transmitting high-speed control information corresponding to a high-speed data-transmitting channel, all prescribed in a prescribed communication standard, and

wherein said priority-setting unit puts aside said channel for transmitting high-speed control information as a priority channel, and determines order of priority of said data-transmitting channel and said high-speed-control-information-transmitting channel.

3. A mobile communication terminal as set forth in claim 2,

wherein said priority-setting unit uses, as the materials for setting the order of priority of channels, information about whether or not said data-transmitting channel and said high-speed-control-information-transmitting channel are used, whether or not data transmitted through the high-speed-control-information-transmitting channel is the retransmission-control information to the communication device at the other end when said data-transmitting channel and said high-speed-control-information-transmitting channel are used, and whether or not information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end when said data-transmitting channel and said high-speed-control-information-transmitting channel are used,

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said data-transmitting channel if retransmission is demanded by retransmission-control information of said high-speed-control-information-transmitting channel,

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if retransmission is not demanded by retransmission-control information of said high-speed-control-information transmitting channel, and

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if the information on the quality of reception is transmitted to the communication device at the other end through said high-speed-control-information-transmitting channel.

4. A mobile communication terminal as set forth in claim 2,

wherein said priority-setting unit uses, as the materials for setting the order of priority of channels, information about whether or not said data-transmitting channel and said high-speed-control-information-transmitting channel are used, whether or not the information transmitted through the high-speed-control-information-transmitting channel is the retransmission-control information to the communication device at the other end when said data-transmitting channel and said high-speed-control-information-transmitting channel are used, and the data-transmission rate of said high-speed data-transmitting channel when retransmission is not demanded by the retransmission-control information of said high-speed-control-information-transmitting channel, and

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if retransmission is not demanded by retransmission-control information of said high-speed-control-information-transmitting channel and the data-transmission rate of said high-speed data-transmitting channel is higher than a prescribed threshold value.

5. A mobile communication terminal as set forth in claim 3,

wherein said priority-setting unit uses also the data-transmission rate of said high-speed data-transmitting channel as the prescribed material for setting the order of priority of channels when retransmission is not demanded by the retransmission-control information of said high-speed-control-information-transmitting channel, and

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if retransmission is not demanded by the retransmission-control information of said high-speed-control-information-transmitting channel and the data-transmission rate of said high-speed data-transmitting channel is higher than a prescribed threshold value.

6. A mobile communication terminal as set forth in claim 2,

wherein said priority-setting unit uses, as the materials for setting the order of priority of channels, information about whether or not said data-transmitting channels and said high-speed-control-information-transmitting channel are used, whether or not information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end when said data-transmitting channel and said high-speed-control-information-transmitting channel are used, and time intervals of transmission of the information on the quality of reception signals when the information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end, and

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if the information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end and the time intervals of transmission of the information is longer than a prescribed threshold value.

7. A mobile communication terminal as set forth in claim 3,

wherein said priority-setting unit uses also the time intervals of transmission of the information on the quality of reception as the material for setting the order of priority of channels when the information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end, and

wherein, while said data-transmitting channel and said high-speed-control-information-transmitting channel are being used, said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if the information on the quality of reception is transmitted through said high-speed-control-information-transmitting channel to the communication device at the other end and the time intervals of transmission of the information is longer than a prescribed threshold value.

8. A mobile communication terminal as set forth in claim 2,

wherein said priority-setting unit uses the power-distribution ratio among the channels as the prescribed material for setting the order of priority of channels and gives priority to said data-transmitting channel if the power-distribution ratio of said data-transmitting channel to said high-speed-control-information-transmitting channel is equal to or smaller than a prescribed threshold value and gives priority to said high-speed-control-information-transmitting channel if the power-distribution ratio of said data-transmitting channel to said high-speed-control-information-transmitting channel is larger than the prescribed threshold value.

9. A mobile communication terminal as set forth in claim 1;

wherein the plurality of channels through which multiplexed signals are sent and received includes at least

a data-transmitting channel,

a control information-transmitting channel for transmission of control information corresponding to said data-transmitting channel, and

a channel being different from said data-transmitting channel for transmitting high-speed control information corresponding to a high-speed data-transmitting channel, all prescribed in a prescribed communication standard,

wherein said priority-setting unit uses, as the prescribed materials for setting the order of priority of channels, information about whether data to be transmitted through said data-transmitting channel can be retransmitted or not and whether a buffer for storage of the data to be retransmitted has sufficient unused capacity or not if the data can be retransmitted, and

wherein said priority-setting unit gives priority to said data-transmitting channel if the data to be transmitted through said data-transmitting channel cannot be retransmitted or the buffer does not have sufficient unused capacity.

10. A mobile communication terminal as set forth in claim 1;

wherein the plurality of channels through which multiplexed signals are sent and received includes at least

a data-transmitting channel,

a control information-transmitting channel for transmission of control information corresponding to said data-transmitting channel, and

a channel being different from said data-transmitting channel for transmitting high-speed control information corresponding to a high-speed data-transmitting channel, all prescribed in a prescribed communication standard,

wherein said priority-setting unit uses, as the prescribed materials for setting the order of priority of channels, information about whether data to be transmitted through said high-speed data-transmitting channel can be retransmitted or not and whether a buffer for storage of the data to be retransmitted has sufficient unused capacity or not if the data can be retransmitted, and

wherein said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if the data to be transmitted through said high-speed data-transmitting channel cannot be retransmitted or the buffer does not have sufficient unused capacity.

11. A mobile communication terminal as set forth in claim 1;

wherein the plurality of channels through which multiplexed signals are sent and received includes at least

a data-transmitting channel,

a control information-transmitting channel for transmission of control information corresponding to said data-transmitting channel, and

a channel being different from said data-transmitting channel for transmitting high-speed control information corresponding to a high-speed data-transmitting channel, all prescribed in a prescribed communication standard,

wherein said priority-setting unit uses, as the prescribed materials for setting the order of priority of channels, information about whether data to be transmitted through said data-transmitting channel can be retransmitted or not, whether a buffer for storage of the data to be retransmitted through said data-transmitting channel has sufficient unused capacity or not if the data can be retransmitted through said data-transmitting channel, whether data to be transmitted through said high-speed data-transmitting channel can be retransmitted or not if the data to be transmitted through said data-transmitting channel can be retransmitted and the buffer has sufficient unused capacity for storage of the data to be retransmitted through said data-transmitting channel, and whether the buffer for storage of the data to be retransmitted through said high-speed data-transmitting channel has sufficient unused capacity or not if the data can be retransmitted through said high-speed data-transmitting channel,

wherein said priority-setting unit gives priority to said data-transmitting channel if the data cannot be retransmitted through said data-transmitting channel or the buffer does not have sufficient unused capacity for the storage of the data to be retransmitted through said data-transmitting channel, and

wherein said priority-setting unit gives priority to said high-speed-control-information-transmitting channel if the data can be retransmitted through said data-transmitting channel, the buffer has sufficient unused capacity for the storage of the data to be retransmitted through said data-transmitting channel, and the data cannot be retransmitted through said high-speed data-transmitting channel or the buffer does not have sufficient unused capacity for the storage of the data to be retransmitted through said high-speed data-transmitting channel.

12. A method of controlling transmission power comprising the steps of:

sending and receiving multiplexed signals by a signal-sending/receiving unit through a plurality of channels,

adjusting the transmission power of the individual channels by a transmission-power adjuster,

controlling a power-distribution ratio by a transmission-power controller for the adjustment, by said transmission-power adjuster, of the transmission power of the individual channels, and

setting the order of priority of the channels by using prescribed materials for determining the order of priority;

wherein said step of controlling the power-distribution ratio by said transmission-power controller includes the steps of

comparing the transmission power demanded through said signal-sending/receiving unit by the communication device at the other end and information about the maximum transmission power of the mobile communication terminal held by the information holder, and

determining the power-distribution ratio among the individual channels in such a way that the transmission power of the individual channels is controlled according to the transmission power demanded by the communication device at the other end and, if the total transmission power of the channels is going to exceed the maximum transmission power, the transmission power of the channel given priority by said priority-setting unit is adjusted to a power level demanded by the communication device at the other end on the one hand and the transmission power of a channel or channels not given priority by said priority-setting unit is adjusted so as to confine the total transmission power to the maximum transmission power on the other hand.