Radio data communication system comprising a common base radio station and handy radio terminals

• US 5,640,684 A
• Filed: 08/08/1995
• Issued: 06/17/1997
• Est. Priority Date: 08/08/1994
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Uno, Yukiko, Watanabe, Takeshi, Konosu, Koji, Nojiri, Tadao, Kitazumi, Yoshimi
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): VO, NGUYEN THANH
• Application Number:
  US08/512,648
• Time in Patent Office: 679 Days
• Field of Search: 455/67.7, 455/67.1, 455/67.3, 455/67.4, 455/69, 455/9, 455/54.1, 455/226.1, 455/226.2, 455/226.3, 455/226.4, 379/34, 379/1, 379/29
• US Class Current: 455/67.7
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04L 1/20 using signal quality detector

Abstract

A portable radio station 1a transmits a communication-quality-confirmation pattern data "f" to a stationary radio station 2a, wherein a first communication quality information "1" is produced by measuring erroneous bits of the received signal. The first communication quality information "1" is transmitted from the stationary radio station 2a to the portable radio station 1a, together with a communication-quality confirmation pattern data "n". The portable radio station 1a receives both the first communication quality information "1" and the communication-quality confirmation pattern data "n", and produces a second communication quality information by measuring erroneous bits of the received signal. Then, the first and second communication quality information are independently displayed on a display section 18 of the portable radio station 1a.

Claims

1. A radio communication system for performing radio communication between first and second radio stations, comprising:

communication-quality-confirmation request signal transmitting means provided in said first radio station for transmitting a communication-quality-confirmation request signal from said first radio station to said second radio station, said communication-quality-confirmation request signal including a first predetermined pattern data;

second-radio-station measuring means provided in said second radio station for memorizing a first referential pattern data constructed by pattern data corresponding to said first predetermined pattern data, receiving said first predetermined pattern data involved in said communication-quality-confirmation request signal transmitted from said first radio station, and producing second-radio-station measuring data by comparing said first predetermined pattern data with said first referential pattern data;

communication-quality-confirmation response signal transmitting means provided in said second radio station for transmitting a communication-quality-confirmation response signal from said second radio station to said first radio station, said communication-quality-confirmation response signal including a second predetermined pattern data and said second-radio-station measuring data produced by said second-radio-station measuring means;

first-radio-station measuring means provided in said first radio station for memorizing a second referential pattern data constructed by pattern data corresponding to said second predetermined pattern data, receiving said second predetermined pattern data and said second-radio-station measuring data involved in said communication-quality-confirmation response signal transmitted from said second radio station, and producing first-radio-station measuring data by comparing said second predetermined pattern data with said second referential pattern data; and

display means provided in said first radio station for displaying said first measuring data measured by said first-radio-station measuring means together with said second measuring data measured by said second-radio-station measuring means, thereby indicating quality of radio communication between said first and second radio stations.

2. The radio communication system defined by claim 1, further comprises:

second-radio-station electric field intensity measuring means provided in said second radio station for measuring an electric field intensity of said communication-quality-confirmation request signal when said communication-quality-confirmation request signal is received;

electric field intensity transmitting means provided in said second radio station for transmitting a second-radio-station field intensity signal to said first radio station, said second-radio-station field intensity signal comprising information relating to said electric field intensity measured by said second-radio-station electric field intensity measuring means;

first-radio-station electric field intensity measuring means provided in said first radio station for receiving said second-radio-station field intensity signal transmitted from said electric field intensity transmitting means and producing a first-radio-station field intensity signal by measuring an electric field intensity of said second-radio-station field intensity signal received; and

electric field intensity display means provided in said first radio station for displaying electric field intensity information of said first and second radio stations independently based on said first-radio-station field intensity signal measured by said first-radio-station electric field intensity measuring means and said second-radio-station field intensity signal measured by said second-radio-station electric field intensity measuring means.

3. The radio communication system defined by claim 1, wherein said first radio station is a portable radio station, while said second radio station is a stationary radio station.

4. The radio communication system defined by claim 3, further comprises:

radio wave environment information generating means for generating radio wave environment information by successively measuring radio wave environment at an operating place of said portable radio station;

radio wave environment information memory means for memorizing said radio wave environment information; and

radio wave environment information display means for displaying said radio wave environment information.

5. The radio communication system defined by claim 4, wherein

said radio wave environment information generating means produces plural radio wave environment information by successively measuring a radio wave environment with respect to each of a plurality of communication paths;

said radio wave environment information memory means memorizes said plural radio wave environment information; and

said radio wave environment information display means displays said plural radio wave environment information.

6. The radio communication system defined by claim 1, wherein a total number of said first radio station is larger than a total number of said second radio station.

7. The radio communication system defined by claim 1, wherein said first radio station comprises judging means for checking whether said second radio station returns said communication-quality-confirmation response signal within a predetermined time after said communication-quality-confirmation signal is transmitted from said first radio station to said second radio station.

8. The radio communication system defined by claim 7, wherein said display means displays a warning that indicates difficulty of receiving said second-radio-station measuring data when no response signal is returned from said second radio station within the predetermined time.

9. The radio communication system defined by claim 1, wherein said second-radio-station measuring means counts a total number of faulty bits having data errors by comparing said first predetermined pattern data with said first referential pattern data, thereby producing said second-radio-station measuring data based on said total number of said faulty bits.

10. The radio communication system defined by claim 1, wherein said first-radio-station measuring means counts a total number of faulty bits having data errors by comparing said second predetermined pattern data with said second referential pattern data, thereby producing said first-radio-station measuring data based on said total number of said faulty bits.