초록 ▼

In a wireless telephone of a mobile communication system, which performs transmission in a series of bursts, in synchronism with a receive signal transmitted from a base station, each transmission burst being performed responsive to a transmission timing signal, a sync signal is detected from the re

In a wireless telephone of a mobile communication system, which performs transmission in a series of bursts, in synchronism with a receive signal transmitted from a base station, each transmission burst being performed responsive to a transmission timing signal, a sync signal is detected from the receive signal, the transmission timing signal is generated on the basis of the sync signal, and each transmission burst is effected in accordance with the transmission timing signal. When the sync signal ceases to be detected, the transmission timing signal is autonomously generated for a certain time period after the sync signal is last detected. In another aspect of the invention, during reception in a first channel, the channel quality of another vacant channel is measured by transferring PLL data to a PLL prior to the slot in which the measurement is effected. In a further aspect of the invention, bit stream data transmitted from the base station is converted into byte stream data and used for control within the wireless telephone.

대표청구항 ▼

[ What is claimed is:] [5.] A wireless telephone in a TDMA system having a Mobile Assisted Hands-Off (MAHO) function, comprising:reception means for receiving a signal from a base station, said reception means capable of reception in a selected one of a plurality of channels of different frequencies

[ What is claimed is:] [5.] A wireless telephone in a TDMA system having a Mobile Assisted Hands-Off (MAHO) function, comprising:reception means for receiving a signal from a base station, said reception means capable of reception in a selected one of a plurality of channels of different frequencies;a controller for causing the reception means in a state of reception in a first channel, to perform tentative reception and measurement in a second channel to determine whether it is desirable to change a reception channel signal from the first channel to the second channel;a Phase Lock Loop (PLL) for determining the frequency of the signal received by said reception means;said controller normally causing said PLL to generate a first frequency corresponding to the first channel by providing said PLL with first control data, causing, during said MAHO operation, said PLL to generate a second frequency corresponding to the second channel by providing said PLL with second control data, and applying a change timing signal for causing said PLL to change from the first frequency to the second frequency;means for measuring the channel quality of the said second channel;wherein said signal transmitted from said base station is time-divided in a plurality of slots including a first slot which is currently allocated to the wireless telephone and a second slot in which the measurement of the channel quality of said second channel is effected, andsaid controller performs the operation for transferring the first control data to said PLL, prior to the commencement of the second slot, and performs said operation for changing the generated frequency during said second slot.