Mobile communication system

• US 5,369,664 A
• Filed: 02/11/1993
• Issued: 11/29/1994
• Est. Priority Date: 08/12/1991
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Takahashi, Kenichi, Ohnishi, Hiroshi, Takeishi, Minako
• Primary Examiner(s): Barron, Jr., Gilberto
• Application Number:
  US08/016,219
• Time in Patent Office: 656 Days
• Field of Search: 375/1, 370/79, 370/95.3, 455/56.1
• US Class Current: 375/138
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 3/1682 Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
• CPC Class Codes: H04L 1/06 using space diversity

Abstract

Each of groups each has a plurality of communication channels. There are generated signals to be transmitted via the respective communication channels in the groups. The transmitted signals are time-division-multiplexed into a data sequence for each of the groups. The data sequences are spectrum-spread in response to different spread code patterns respectively. A reserve time slot may be provided. In cases where a reduction of a received signal quality related to one of the communication channels is detected, the reserve time slot is used in transmitting the signal of said one of the communication channels.

Claims

1. A mobile communication

means for providing groups each having a plurality of communication channels;

means for generating signals to be transmitted via the respective communication channels in the groups;

means for time-division-multiplexing the transmitted signals into a data sequence for each of the groups;

means for spectrum-spreading the data sequences in response to different spread code patterns respectively;

means for providing a reserve time slot;

means for detecting a reduction of a received signal quality related to each of the communication channels; and

means for, in cases where a reduction of a received signal quality related to one of the communication channels is detected, using the reserve time slot in transmitting the signal of said one of the communication channels.

2. A mobile communication system comprising:

a burst generating circuit for generating burst data in parallel in response to input data;

a parallel-to-serial converter unit, coupled to the output of the burst generating circuit, for receiving the burst data and converting the burst data into a plurality of serial burst data streams, said parallel-to-serial converter unit including a plurality of segments corresponding to the plurality of serial burst data streams, wherein each segment includes a plurality of registers corresponding to time slots and a parallel-to-serial converter element coupled to the output of the registers, wherein the time slots include at least one reserve time slot and a plurality of general time slots;

a plurality of spread spectrum circuits respectively coupled to outputs of the plurality of segments of the parallel-to-serial converter unit, wherein a different spread code pattern is applied to each of the spread spectrum circuits;

output means coupled to outputs of the spread spectrum circuits and for generating a time-division-multiplexed output signal comprising a plurality of communication channels, wherein the communication channels are assigned to the general time slots and burst data to transmitted over the communication channels is loaded into the registers corresponding to the general time slots assigned to the communication channels;

monitoring circuit means for detecting a communication channel having a reduced reception signal quality from the plurality of communication channels and generating an output signal indicative thereof; and

control means responsive to the output signal generated by the monitoring circuit means for controlling the operation of the burst reassign the communication channel having the reduced reception signal quality to a reserve time slot, wherein burst data to be transmitted over the communication channel having the reduced reception signal quality is then loaded into the register corresponding to the reserve time slot.