Transmission power control of mobile radiotelephone station in response to base station control signal where base station data is collected by the mobile radiotelephone station

• US 5,386,588 A
• Filed: 06/17/1991
• Issued: 01/31/1995
• Est. Priority Date: 06/19/1990
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yasuda, Hiroshi
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): URBAN, EDWARD F
• Application Number:
  US07/716,002
• Time in Patent Office: 1,324 Days
• Field of Search: 455/33.1, 455/33.2, 455/52.1, 455/54.1, 455/54.2, 455/56.1, 455/69, 455/126, 379/60, 379/59
• US Class Current: 455/423
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A radiotelephone communication system is provided, in which radio communication channels including control channels and a plurality of communication channels are set between a plurality of base stations and a plurality of mobile stations provided within radio zones of the base stations, an outgoing call and an incoming call are controlled and the communication channels are designated via the control channels, a telephone conversation is made via the communication channels, channels of different frequencies are allocated to adjacent radio zones of the radio zones, each base station includes a circuit for detecting receiving electric field intensity of mobile station and the channel, the base station and operation of radio transmitter and receiver of the mobile station are set such that, when the mobile station is moved between the radio zones, the mobile station is constantly connected to the base station whose communication state is satisfactory. In this radiotelephone communication system, the mobile station is comprised of a circuit for detecting receiving electric field intensities of transmission signals of the plurality of base stations, a memory for storing data associated with detected receiving electric field intensity, and a circuit for transmitting an information associated with the data to the base stations via a up-channel, wherein the base station analyzes the information associated with the data transmitted from the mobile station and sets a transmission power of a mobile station which transmits the data or receiving and transmitting conditions between the radio zones in response to the analyzed result.

Claims

1. A radiotelephone communication system comprising:

a plurality of mobile radiotelephone stations, each mobile radiotelephone station including;

station receiving means for receiving a plurality of incoming signals, each of the plurality of incoming signals having a received signal strength level;

measuring means for measuring the received signal strength level of each of the plurality of incoming signals;

memory means for storing data associated with the received signal strength level of each of the plurality of incoming signals;

station transmitting means for transmitting an information associated with said data to one of said base stations via an up-channel; and

reducing means for reducing a transmission power in response to a control signal; and

a plurality of base stations, each base station including;

base receiving means for receiving the information via the up-channel from a mobile radiotelephone station;

analyzing means for analyzing the information to determine how many incoming signals received by the mobile radiotelephone station have a signal strength level which is within a predetermined range of a highest signal strength level,

setting means for generating the control signal when the mobile radiotelephone station has an incoming signal with a signal strength level within the predetermined range of the highest signal strength level, the control signal setting the transmission power of the mobile radiotelephone station, and

base transmitting means for transmitting the control signal to the mobile radiotelephone station.

2. A mobile radiotelephone station for communicating with a radiotelephone communication system, the mobile radiotelephone station comprising:

means for receiving a plurality of incoming signals transmitted from a corresponding plurality of base stations within the radiotelephone communication system, each of the plurality of incoming signals having a received signal strength level;

means for measuring the received signal strength level of each of the plurality of incoming signals to produce signal strength data;

means for evaluating the signal strength data to determine which incoming signal has the largest received signal strength level;

means for evaluating the signal strength data to determine how many of the incoming signals have a signal strength level within a predetermined range of the largest received signal strength level;

means for identifying the base station that transmitted the incoming signal with the largest received signal strength level; and

means for transmitting an outgoing signal which identifies the base station having the largest signal strength level, the outgoing signal indicating how many incoming signals have a received signal strength level within the predetermined range of the largest signal strength level.

3. The station of claim 2 and further comprising memory means for storing data associated with the received signal strength level of each of the plurality of incoming signals.