US 6,618,364 B2 · Frame offset setting arrangement and frame offset setting method

Abstract

In a frame offset setting arrangement which is arranged in a base station of a code division multiple access system for setting frame offset values in mobile units by informing the frame offset values to the mobile units, a concentration detecting part (110, 111) detects concentration in distribution of the frame offset values set in the mobile units. The frame offset values represent amounts of offsetting, from a leading edge of each frame, transmission timings of speech packets when the mobile units transmit the speech packets to the base station, respectively. A leveling part (112-121) levels, when the concentration detecting part detects the concentration, the frame offset values for the mobile units which are currently on communication. Specifically, the number of the mobile units using each frame offset value is counted. With reference to counted values, new frame offset values are selected to thereby cancel the concentration.

Claims22

Dependent claims

A frame offset setting arrangement arranged in a base station of a code division multiple access system for setting frame offset values in mobile units by informing said frame offset values to said mobile units, said frame offset values representing amounts of offsetting, from a leading edge of each frame, transmission timings of speech packets when said mobile units transmit said speech packets to said bas station, respectively, said frame offset setting arrangement comprising:

concentration detecting means for detecting concentration in distribution of said frame offset values set in said mobile units;
and
leveling means for leveling, when said concentration detecting means detects said concentration, the frame offset values for the mobile units which are currently in communication.

A frame offset setting method carried out in a base station of a code division multiple access system for setting frame offset values in mobile units by assigning one of a predetermined number of said frame offset values to each of said mobile units, said frame offset values representing amounts of offsetting, from a leading edge of a frame, transmission timings of speech packets when said mobile units transmit said speech packets to said base station, respectively, said frame offset setting method comprising:

counting a number of mobile units assigned to each of the predetermined number of frame offset values;
detecting concentration in distribution of said frame offset values by detecting when the counted number of mobile units assigned to one of said frame offset values reaches a predetermined value;
and
leveling, when said concentration detecting step detects said concentration, the frame offset values assigned to at least two of the mobile units which are currently in communication with the base station while maintaining the predetermined number of frame offset values.

1 more element

A frame offset setting device employed in a base station of a code division multiple access system for setting frame offset values in mobile units by assigning one of a predetermined number of said frame offset values to each of said mobile units, said frame offset values representing amounts of offsetting, from a leading edge of a frame, transmission timings of speech packets when said mobile units transmit said speech packets to said base station, respectively, said frame offset setting device comprising:

a concentration detecting section that detects concentration in distribution of said frame offset values set in said mobile units;
and
a leveling section that levels, when said concentration detecting section detects said concentration, the frame offset values assigned to at least two of the mobile units which are currently in communication with the base station while maintaining the predetermined number of frame offset values.

Dependencies are inferred from the claim text.

Frame offset setting arrangement and frame offset setting method

Life of this patent

Frame offset setting arrangement and frame offset setting method

Life of this patent

Abstract

Claims22