Radio communication system having re-send control method

• US 5,940,769 A
• Filed: 03/27/1996
• Issued: 08/17/1999
• Est. Priority Date: 03/30/1995
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Sugawara, Tsutomu, Kumaki, Yoshinari, Ogura, Koji, Kamagata, Eiji, Serizawa, Mutsumu, Wakutsu, Takashi, Nakajima, Nobuyasu, Nounin, Katsuya
• Primary Examiner(s): Urban, Edward F.
• Application Number:
  US08/624,820
• Time in Patent Office: 1,238 Days
• Field of Search: 455/34.1, 455/54.1, 455/54.2, 455/56.1, 455/67.1, 455/39, 455/450, 455/452, 455/509, 455/517, 455/524, 455/423, 370/216, 370/310, 371/30, 371/32, 371/33, 371/35, 395/182.16
• US Class Current: 455/509
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links

Abstract

In a radio communication system, communication for sending data from a transmitting station to a receiving station and communication for transmitting re-send data from the transmitting station to the receiving station according to the re-send request transmitted from the receiving station to the transmitting station are done on different occasions of communication. Hence, in the applications not requiring real time service, this re-send control method does not spend the power and radio resources wastefully, and by effectively utilizing the system resources and lowering the power consumption, the battery of the terminal may be reduced in size, so that the portability of the terminal may be enhanced. Further, the radio communication system has a high speed down-link channel and a low speed down-link channel, data to be transmitted from a base station to a terminal is classified into primary data and secondary data, the primary data is transmitted by the high speed down-link channel, and the secondary data is transmitted by the low speed down-link channel.

Claims

1. A radio communication system comprising:

at least one transmitting station configured to transmit data comprising plural data packets to at least one receiving station configured to receive data;

a sending device configured to send response signals from said at least one receiving station to said at least one transmitting station, each of said response signals showing presence or absence of transmission error in said plural data packets; and

a re-sending device configured to re-send data packets, in which presence of the transmission error is indicated by said response signals, from said at least one transmitting station to said at least one receiving station,

wherein said at least one transmitting station includes,

a down-link channel from said at least one transmitting station to said at least one receiving station that comprises,

a high speed transmission down-link channel, and

a low speed transmission down-link channel, and

an up-link channel from said at least one receiving station to said at least one transmitting station, said up-link channel being equal in transmission speed to said low speed transmission down-link channel, and

wherein a communication range of said high speed transmission down-link channel is different from a communication range of said low speed transmission down-link channel.

2. A radio communication system comprising:

at least one transmitting station configured to transmit data comprising plural data packets to at least one receiving station configured to receive data;

a sending device configured to send response signals from said at least one receiving station to said at least one transmitting station, each of said response signals showing presence or absence of transmission error in said plural data packets; and

a re-sending device configured to re-send data packets, in which presence of the transmission error is indicated by said response signals, from said at least one transmitting station to said at least one receiving station,

wherein said at least one transmitting station includes,

a down-link channel from said at least one transmitting station to said at least one receiving station that comprises,

a high speed transmission down-link channel, and

a low speed transmission down-link channel, and

an up-link channel from said at least one receiving station to said at least one transmitting station, said up-link channel being equal in transmission speed to said low speed transmission down-link channel, and

wherein said re-sending device re-sends data by said high speed transmission down-link channel only when a data quantity to be re-sent is more than a specified quantity, and re-sends data by said low speed transmission down-link channel when the data quantity to be re-sent is equal to or less than the specified quantity.