Channel assigning method in a mobile communication system

• US 5,093,924 A
• Filed: 09/19/1990
• Issued: 03/03/1992
• Est. Priority Date: 09/19/1989
• Status: Expired due to Fees

• Current Assignee: NTT Mobile Communications Network Inc. (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Nippon Telegraph and Telephone Corporation
• Inventors: Toshiyuki, Maeda, Shuji, Yasuda, Seizo, Onoe
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Pham, Chi H.
• Application Number:
  US07/585,344
• Time in Patent Office: 531 Days
• Field of Search: 455/33, 455/34, 455/54, 455/56, 455/62, 455/63, 455/67, 379/59, 379/60, 379/63
• US Class Current: 455/450
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

According to a channel assigning method for use in a mobile communication system, a base station selects, in response to a communication connection request, a communication radio channel having an interference wave reception level which is obtained by a measuring unit and satisfies a quality conditions of a communication channel from a plurality of communication radio channels, and transmits information of the communication radio channel to a mobile station as an object of the communication connection request. The mobile station selects the communication radio channel transmitted by the base station, measures an interference wave reception level, and transmits the measurement result to the base station. The base station checks whether the measurement result satisfies the quality conditions of a communication path, and assigns the communication radio channel to the requested communication when the measurement result satisfies the quality conditions of a communication path.

Claims

1. A channel assigning method for use in a mobile communication system in which a plurality of base stations constituting small radio zones for performing communication connection with a mobile station are distributed in a service area, a plurality of communication radio channels for use in communication with said mobile station are arranged for each of said base stations, and when a communication connection request is generated, a communication radio channel which satisfies quality conditions of a communication path is selected and assigned, each said base station and said mobile station including means for measuring an interference wave reception level of a communication radio channel, comprising the steps of:

causing a base station to select, in response to the communication connection request, a communication radio channel having an interference wave reception level which is obtained by said measuring means and satisfies the quality conditions of a communication channel from said plurality of communication radio channels, and transmit information of said communication radio channel to a mobile station as an object of the communication connection request;

causing said mobile station to select said communication radio channel transmitted by said base station, measure an interference wave reception level, and transmit the measurement result to said base station; and

causing said base station to check whether the measurement result satisfies the quality conditions of a communication path, and assign said communication radio channel to the requested communication when the measurement result satisfies the quality conditions of a communication path.

2. A method according to claim 1, wherein said base station selects a plurality of communication radio channels in response to the communication connection request, said mobile station measures an interference wave reception level of each of said plurality of communication radio channels, and said base station selects, in accordance with the measurement results of said plurality of communication radio channels transmitted from said mobile station, one of said communication radio channels which satisfies predetermined quality conditions.

3. A method according to claim 1, wherein if said base station determines that the measurement result transmitted from said mobile station and indicating an interference wave reception level of said communication radio channel designated by said base station does not satisfy the quality conditions of a communication level, said base station assigns another communication radio channel to check the quality of a measurement result of an interference wave reception level obtained by said mobile station.

4. A channel assigning method for use in a mobile communication system in which a plurality of base stations constituting small radio zones for performing communication connection with a mobile station are distributed in a service area, a plurality of communication radio channels for use in communication with said mobile station are arranged in each of said base stations, and when a communication connection request is generated, a communication radio channel which satisfies quality conditions of a communication path is selected and assigned, each said base station and said mobile station including means for measuring an interference wave reception level of a communication radio channel, comprising the steps of:

causing a mobile station to select, in response to the communication connection request, a communication radio channel having an interference wave reception level which is obtained by said measuring means and satisfies the quality conditions of a communication path from said plurality of communication radio channels, and transmit information of said communication radio channel to a base station;

causing said base station to measure an interference wave reception level of said communication radio channel transmitted by said mobile station; and

causing said base station to check whether the measurement result satisfies the quality conditions of a communication path, and assign said communication radio channel to the requested communication when the measurement result satisfies the quality conditions of a communication path.