Transmission control method and apparatus for mobile communication system

• US 7,120,457 B2
• Filed: 03/03/2003
• Issued: 10/10/2006
• Est. Priority Date: 11/27/1996
• Status: Expired due to Fees

• Current Assignee: FIPA Frohwitter Intellectual Property AG
• Original Assignee: Hitachi, Ltd.
• Inventors: Doi, Nobukazu, Yano, Takashi, Esmailzadeh, Riaz
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US10/376,310
• Publication Number:
  US 20030130004A1
• Time in Patent Office: 1,317 Days
• Field of Search: 455/522, 455/450, 455/517, 455/69, 455/13.4, 455/63.1, 455/114.2, 455/67.13, 455/296, 455/67.11, 455/127.1, 455/572, 455/115.1, 370/318, 370/332
• US Class Current: 455/522
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/362 Aspects of the step size

Abstract

A method and apparatus for controlling the power of a signal transmitted between a base station and a mobile terminal which constitute a mobile communication system. At least one of the base station and the mobile terminal has functions to compare a predetermined reference value and a necessary transmission power obtained as a result of transmission power control in order to compensate for a signal intensity fluctuation occurring on a link between the base station and the mobile terminal, temporarily stopping the transmission if the necessary transmission power is larger than a predetermined permissible value, and transmit the signal if the necessary transmission power is equal to or smaller than the predetermined permissible value.

Claims

1. A base station for communicating with a mobile terminal, comprising:

an antenna for receiving signals from said mobile terminal and transmitting signals to said mobile terminal; and

a digital signal processor (DSP) for judging whether or not to transmit data to said mobile terminal based on a condition of a channel between said mobile terminal and said base station,

wherein, if said DSP judges not to transmit said data, said transmission of the data is temporarily stopped.

2. A base station according to claim 1, wherein, if said DSP judges not to transmit said data, said transmission of the data is stopped for at least a slot period.

3. A base station according to claim 1, wherein said condition of a channel includes a signal intensity of a signal received via the channel between said mobile terminal and said base station.

4. A base station according to claim 3, wherein said signal intensity is a signal intensity of a signal received at said mobile terminal from the base station.

5. A base station according to claim 1, wherein said condition of the channel is measured at said mobile terminal, and the base station receives, from said mobile terminal, information indicating said condition of the channel.

6. A method of controlling data transmission from a base station to a mobile terminal, comprising the steps of:

monitoring a condition of a channel between said mobile terminal and said base station;

judging whether or not to transmit data based on said monitored condition of said channel; and

if it is judged not to transmit the data, temporarily stopping said transmission of the data.

7. A method of controlling data transmission according to claim 6, wherein said transmission is stopped for at least a slot period.

8. A method of controlling data transmission according to claim 6, wherein said condition of a channel includes a signal intensity of a signal received via the channel between said mobile terminal and said base station.

9. A method of controlling data transmission according to claim 8, wherein said signal intensity is a signal intensity of a signal received at said mobile terminal from the base station.

10. A method of controlling data transmission according to claim 6, wherein said condition of the channel is measured at said mobile terminal, and the base station receives, from said mobile terminal, information indicating said condition of the channel.