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| Communicating packet data with a mobile station roaming within an incompatible mobile network |
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| Communique system with active feedback for cellular communication networks |
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| Mobile internet access |
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| Mobile IP communication scheme for supporting mobile computer move over different address spaces |
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Communication method, communication system and communication apparatus
| Details |
Inventors: Fukui, Noriyuki; Fujie, Ryouichi; Kusano, Masaaki; Shibuya, Akihiro;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Beamer; Temica
Assistant Examiner: Contee; Joy
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
A transmitting station receives, from one of receiving-stations to which it has been assigned a communication channel, a retransmission request indicating retransmission of a particular frame, switches the communication with the one receiving station to a communication according to an SAW (Stop and Wait) scheme, retransmits the particular frame according to the SAW scheme to the one receiving station, assigns the communication channel that was assigned to the one receiving station another receiving station, and switches the communication with the one receiving station to the successive transmission upon reception from the one receiving station of a reply indicative of correct reception of the particular frame. |
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DETAILED DESCRIPTION The invention claimed is: 1.
A communication method of performing channel assignment between a transmitting station and a plurality of receiving stations according to an ARQ (Automatic Repeat request) scheme, comprising: the transmitting station assigning a communication channel to at least one receiving station from among the plurality of receiving stations to perform successive transmission of frames with the one receiving station; the transmitting station receiving, from a requestor receiving-station from among the receiving stations to which the transmitting station has assigned the communication channel, a retransmission request indicating retransmission of a particular frame; the transmitting station switching the communication with the requestor receiving-station to a communication according to an SAW (Stop and Wait) scheme that is one implementation of the ARQ scheme; the transmitting station retransmitting the particular frame according to the SAW scheme to the requester receiving-station; the transmitting station assigning the communication channel that is assigned to the requestor receiving-station to another receiving station, by making use of the fact that there is a decrease in a number of frames to be transmitted in the SAW scheme, and giving a priority to the communication with the another receiving station; the transmitting station switching the communication with the requestor receiving-station to a successive transmission upon reception from the requestor receiving-station of a reply signal indicative of reception of the particular frame as retransmitted without error, and giving a priority to the communication with the requestor receiving-station.
2.
The communication method according to claim 1, further comprising: the requestor receiving-station sending, to the transmitting station, the reply signal that includes information indicative of reception of the frame as retransmitted without error upon reception of the particular frame as retransmitted without error; and the requestor receiving-station sending, to the transmitting station, a second reply signal that includes information indicative of a receiving error upon reception of the particular frame as retransmitted with error and upon obtaining a frame with no error in a packet reconstructing process, wherein the transmitting station continues the communication with the requestor receiving-station according to the SAW scheme upon reception of the second reply signal
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