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Trans-zone switchover method for pHS personal station

A handover and cell technology, applied in the field of PHS personal stations, can solve problems such as time slot overlap

Inactive Publication Date: 2004-11-10
JAPAN RADIO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes this causes the control channel slots of one CS to overlap with the TCH slots of another CS

Method used

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  • Trans-zone switchover method for pHS personal station
  • Trans-zone switchover method for pHS personal station
  • Trans-zone switchover method for pHS personal station

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Embodiment Construction

[0046] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. Components corresponding to those in FIGS. 9-11 are numbered the same, and thus the description of these same components will not be repeated.

[0047] Fig. 1 is a configuration of a PS used in a PHS system in one embodiment of the present invention. The PS in this figure has a similar hardware configuration to the conventional PS shown in FIG. 9 except that the signal transmitting / receiving components are doubled. That is, there are two antennas, antenna switches, receive / transmit circuits in radio unit 12A, and modulators and demodulators in π / 4 QPSK modem 34A. Additionally, each of the TDMA-TDD controller 32A and the TCH-CODEC 30A in the signal processor 14A includes control and processing functions for both transmit / receive systems. In this figure, "-1" is appended to the numbers of the parts related to the first transmit / receive system in the first...

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PUM

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Abstract

To prevent speech interruption at switch-back by decreasing a speech interruption time in the case of hand-over. SOLUTION: Signal reception quality is detected (104) intermittently (102) during a speech (100). In the case a high speed hand-over processing criterion is not satisfied as a result (122), while keeping radio connection with respect to a speech from a radio connection destination CS (stationary station) so far, remaining transmission reception systems not used for a speech are used to detect other CS (124) and to execute calling procedures (128-138) for establishment of the radio connection with the CS thereby reducing a speech interruption time. In the case of switch-back, the similar procedure is executed and speech interruption due to switch-back operation can be prevented during high speed movement.

Description

technical field [0001] The present invention relates to a PHS (Personal Handyphone System) personal station, and more particularly, to a handover method of such a personal station. Background technique [0002] In today's very popular mobile communication systems, such as cellular phone systems or PHS systems, multiple (usually a large number of) Cell Stations (Cell Stations, CS) are geographically distributed. Each CS covers a limited geographical area (cell). The system's cell stations work together to cover the entire urban area. System users often carry a personal station (PS) that fits in the palm of their hand. When communication is required, the user controls the personal station, places calls to or receives calls from other stations. For example, in a PHS system, each CS is connected to other CSs or other mobile communication systems through a public switched telephone network (PSTN) or the like. Accordingly, the PHS user can communicate with other PHS users, wit...

Claims

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Application Information

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IPC IPC(8): H04W36/08H04J3/02H04W36/18H04W76/02H04W88/02
Inventor 铃木正则白垣修三海马泽秀树齐藤正
Owner JAPAN RADIO CO LTD
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