초록 ▼

Introduction of discontinuous transmission in CDMA communications techniques is achieved by selectively using additional spreading codes for spreading a frame of data. By dividing a frame into two or more portions and spreading each portion with a different spreading code, the frame can be transmitt

Introduction of discontinuous transmission in CDMA communications techniques is achieved by selectively using additional spreading codes for spreading a frame of data. By dividing a frame into two or more portions and spreading each portion with a different spreading code, the frame can be transmitted in a compressed mode wherein the information is transmitted during a portion of the frame period, leaving an idle part of the frame in which to perform other functions, such as evaluation of other frequencies for use in handover between frequencies.

대표청구항 ▼

[ What is claimed is:] [1.] A method of code division multiple access in cellular communications, wherein information is transmitted in frames having a specific time duration, said method comprising the steps of:impressing, in a normal mode, a frame of data to be transmitted on P signature sequences

[ What is claimed is:] [1.] A method of code division multiple access in cellular communications, wherein information is transmitted in frames having a specific time duration, said method comprising the steps of:impressing, in a normal mode, a frame of data to be transmitted on P signature sequences to produce a spread information signal;impressing, in a compressed mode, said frame of data on Q signature sequences, wherein Q is greater than P, to produce a compressed spread information signal; andtransmitting one of said spread information signal and said compressed spread information signal;wherein a frame transmitted in said compressed mode includes a first part having a time duration less than said specific time duration and containing a complete coded information signal, and a second part during which said transmitter is idle.