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Wireless communication system and method which improves reliability and throughput of communication and retransmission timeout determining method

A wireless communication system, a technique for retransmission timeout, applied in a wireless communication system for improving reliability and throughput, a retransmission timeout determination method and a program thereof, the field of retransmission timeout determination, capable of solving the interval between response time and minimum response time Problems such as becoming larger, not suitable for communication, unable to apply the system or network, etc.

Active Publication Date: 2004-12-01
RAKUTEN GRP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting problem is that this situation cannot be handled in the usual way
Also, the technique of JP-A 2002-330168 has a problem: since it uses the TCP option of the SYN packet, if the TCP option cannot be used, it cannot be applied to the system or the network
[0013] JP-A-hei 8-008995 also has a problem: If the maximum and minimum response times are updated in the previous communication, the interval between the maximum response time and the minimum response time becomes large
If the bit error rate and communication rate vary greatly in the network such as wireless network, retransmission timeout is not suitable for communication

Method used

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  • Wireless communication system and method which improves reliability and throughput of communication and retransmission timeout determining method
  • Wireless communication system and method which improves reliability and throughput of communication and retransmission timeout determining method
  • Wireless communication system and method which improves reliability and throughput of communication and retransmission timeout determining method

Examples

Experimental program
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no. 1 example

[0090] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0091] figure 1 is a block diagram of the configuration of the wireless communication system according to the first embodiment of the present invention. exist figure 1 Among them, the wireless communication system according to the first embodiment of the present invention includes a data relay device (hereinafter referred to as a relay device) 1, a terminal 3, a base station 4 and a server 5, and a memory device 2 connected to the relay device 1. The relay device 1, the terminal 3, the base station 4, and the server 5 are information processing devices (processors).

[0092] The terminal 3 and the server 5 perform two-way communication via the relay device 1 and the base station 4, using TCP / IP (Transmission Control Protocol / Internet Protocol) as a communication protocol. There is a wireless communication section 101 between the terminal 3 and the base station 4 , an...

no. 2 example

[0147] Figure 10 is a configuration example diagram of the RTT storage unit according to the second embodiment of the present invention. exist Figure 10 , the RTT storage unit 21 stores the expected communication rate (B RATE )(B RATE #1, B RATE #2, B RATE #3.B RATE #4,...,B RATE #m) and the set of maximum change delay times (RTTchg) (RTTchg#1, RTTchg#2, RTTchg#3, RTTchg#4...RTTchg#M), which are related to the communication states (T1, T2, T3, T4,..., Tm) related and used in communication state. Here, m and M (m=M) are positive integers.

[0148] Figure 11 is a flow chart of the retransmission timeout (RTO) calculation process of the relay device according to the second embodiment of the present invention. The configuration of the wireless communication system and the relay device according to the second embodiment of the present invention is similar to figure 1Shown are configurations of a wireless communication system and a relay device according to the first e...

no. 3 example

[0156] Figure 12 is a configuration example diagram of the RTT storage unit according to the third embodiment of the present invention. exist Figure 12 , the RTT storage unit 21 stores the expected communication rate (B RATE )(B RATE #1, B RATE #2, B RATE #3.B RATE #4,...,B RATE #k) and the set of maximum variation delay times (RTTchg) (RTTchg#1, RTTchg#2, RTTchg#3, RTTchg#4...RTTchg#k), which are related to the communication quality (C1, C2, C3, C4,..., Ck) is relevant and used in communication quality state. Here, k is a positive integer.

[0157] Figure 13 is a flow chart of the retransmission timeout (RTO) calculation process of the relay device according to the third embodiment of the present invention. The configurations of the wireless communication system and the relay device according to the third embodiment of the present invention are similar to figure 1 Shown are configurations of a wireless communication system and a relay device according to the fir...

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Abstract

A wireless communication system includes a mobile terminal (3), a base station apparatus (4), a data relay apparatus (1) and a server apparatus (5). One of them includes a transmitting unit (13), a monitoring unit (11) and a determining unit (12). The transmitting unit (13) transmits a transmission data and receives an acknowledgement data (ACK) corresponding to the transmission data through a communication line (101+102). The monitoring unit (11) monitors the transmission data and the acknowledgement data (ACK). The determining unit (12) determines a retransmission timeout period (new RTO) based on a monitored result (Dsize, RTT) in a certain period. The transmitting unit (13) retransmits the transmission data when the acknowledgement data (ACK) is not received in the retransmission timeout period (RTO).

Description

technical field [0001] The invention relates to a wireless communication system for improving network reliability and throughput, and a retransmission overtime determination method used therein. More specifically, the present invention relates to a wireless communication system, a server, a data relay device, a base station device, and a mobile terminal with improved reliability and throughput, a retransmission timeout determination (establishment) method for use therein, and a program thereof. Background technique [0002] Generally, in a wireless communication system, there is a system in which a wireless communication section and a wired communication section coexist with each other, and TCP is used as a communication protocol to transmit data. For example, a system in which a portable terminal and a server perform two-way communication via a base station adopts the following procedure: the receiving end sends an acknowledgment (ACK) about received data to the sending end...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L12/28H04W24/02H04W24/06H04W24/08H04W28/04H04W80/06H04W84/12
CPCH04L47/10H04L47/14H04L47/283H04L1/188H04W28/10H04W8/04
Inventor 中泽透
Owner RAKUTEN GRP INC
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