Method of measuring receive power of CDMA mobile communication system, and CDMA mobile communication system

• US 7,979,085 B2
• Filed: 06/26/2009
• Issued: 07/12/2011
• Est. Priority Date: 04/14/2005
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kondo, Takayuki
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US12/492,342
• Publication Number:
  US 20090262658A1
• Time in Patent Office: 746 Days
• Field of Search: 455/69, 455/522, 455/509, 455/561, 455/436, 455/450, 455/438, 455/444, 455/67.11, 455/70, 455/127.1, 455/63.1, 455/65, 455/67.13, 455/78, 455/565, 370/229, 370/389, 370/503, 370/335, 370/342, 370/252, 370/328, 370/348, 370/324, 370/316
• US Class Current: 455/522
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 52/14 Separate analysis of uplink or downlink
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Abstract

The receive power of uplink signals in a CDMA mobile communication system is measured by prohibiting a mobile station from transmitting an uplink signal including a frame over a first channel during a predetermined transmission prohibition period, and measuring a receive power of uplink signals at a base station transmitted from each of the mobile stations located in a cell during the prohibition period. Another method of measuring the receive power includes measuring a first receive power of uplink signals at a base station from each mobile station located in a cell, and measuring each second receive power of uplink signal including a frame only over a first channel transmitted from each mobile station, and then calculating a total receive power of uplink signals excluding frames over the first channel by subtracting respective second receive powers from the first receive power.

Claims

1. A method of measuring a receive power of uplink signals of a CDMA mobile communication system, comprising:

prohibiting a mobile station from transmitting an uplink signal including a frame over a first channel during a predetermined transmission prohibition period; and

measuring a receive power of uplink signals, at at least one base station, transmitted from each of one or more mobile stations located in a cell during the predetermined transmission prohibition period,

wherein, a timing of the predetermined transmission prohibition period is assigned corresponding to each transmit timing of downlink frames transmitted from the at least one base station, and

wherein said at least one base station includes a plurality of base stations, and wherein each timing of the predetermined transmission prohibition period assigned by respective base stations of said plurality of base stations is synchronized with each other.

2. A method of measuring a receive power of uplink signals of a CDMA mobile communication system, comprising:

prohibiting a mobile station from transmitting an uplink signal including a frame over a first channel during a predetermined transmission prohibition period; and

measuring a receive power of uplink signals, at at least;

one base station, transmitted from each of one or more mobile stations located in a cell during the predetermined transmission prohibition period,

wherein, a timing of the predetermined transmission prohibition period is assigned corresponding to each transmit timing of downlink frames transmitted from the at least one base station, and

wherein said at least one base station includes a plurality of base stations, and wherein each timing of the predetermined transmission prohibition period assigned by respective base stations of said plurality of base stations is asynchronous.

3. A CDMA mobile communication system, comprising:

one or more mobile stations communicating with one or more base stations in one or more cells, wherein at least one of said one or more mobile stations is prohibited from transmitting an uplink signal including a frame over a first channel during a predetermined transmission prohibition period; and

at least one of said one or more base stations measuring a receive power of uplink signals transmitted from the at least one of said one or more mobile stations during the predetermined transmission prohibition period,

wherein, a timing of the predetermined transmission prohibition period is assigned corresponding to each transmit timing of downlink frames transmitted from the at least one of said one or more base stations, and

wherein said one or more base stations includes a plurality of base stations, and wherein each timing of the predetermined transmission prohibition period assigned by respective base stations of said plurality of base stations is synchronized with each other.

4. A CDMA mobile communication system, comprising:

one or more mobile stations communicating with one or more base stations in one or more cells, wherein at least one of said one or more mobile stations is prohibited from transmitting an uplink signal including a frame over a first channel during a predetermined transmission prohibition period; and

at least one of said one or more base stations measuring a receive power of uplink signals transmitted from the at least one of said one or more mobile stations during the predetermined transmission prohibition period,

wherein, a timing of the predetermined transmission prohibition period is assigned corresponding to each transmit timing of downlink frames transmitted from the at least one of said one or more base stations, and

wherein said one or more base stations includes a plurality of base stations, and wherein each timing of the predetermined transmission prohibition period assigned by respective base stations of said plurality of base stations is asynchronous.

5. A base station for a CDMA mobile communication system, comprising:

a receive power measuring unit, which measures a receive power of uplink signals transmitted from one or more mobile stations located in a cell during a predetermined transmission prohibition period,

wherein a timing of the predetermined transmission prohibition period is assigned corresponding to each transmit timing of downlink frames transmitted from a plurality of base stations including at least the base station, and the mobile station is prohibited from transmitting an uplink signal including a frame over a predetermined channel during the predetermined transmission prohibition period,

wherein each timing of the predetermined transmission prohibition period assigned by respective base stations of the plurality of base stations is synchronized with each other.

6. A set of base stations for a CDMA mobile communication system, wherein each base station in said set

measures a receive power of uplink signals transmitted from one or more mobile stations located in a cell, and

measures a receive power of uplink signals transmitted from a mobile station located in the cell during a predetermined transmission prohibition period for which the mobile station is prohibited from transmitting an uplink signal including a frame over a first channel, and

wherein a timing of the predetermined transmission prohibition period assigned by a first base station in the set of base stations is synchronized to a timing of a second predetermined transmission prohibition period assigned by a second base station in the set of base stations.

7. A set of base stations for a CDMA mobile communication system, wherein each base station in said set

measures a receive power of uplink signals transmitted from one or mobile stations located in a cell, and

measures a receive power of uplink signals transmitted from a mobile station located in the cell during a predetermined transmission prohibition period for which the mobile station is prohibited from transmitting an uplink signal including a frame over a first channel, and

wherein a timing of the predetermined transmission prohibition period assigned by a first base station in the set of base stations is asynchronous to a timing of a second predetermined transmission prohibition period assigned by a second base in the set of base stations.