Method and system for transmission of dynamic bandwidth data frame

A dynamic bandwidth and transmission method technology, applied in the field of communication, can solve problems affecting the reasonable and efficient utilization of bandwidth resources, and achieve the effect of reducing overhead and improving data transmission efficiency

Active Publication Date: 2012-09-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the problem in the related art that the increase of the data transmission time will exceed the channel reservation time indicated by the second channel reservation time information, thus affecting the reasonable and efficient utilization of bandwidth resources, the present invention is proposed. Therefore, the main purpose of the present invention is to provide a dynamic Bandwidth data frame transmission method and system to solve the above problems

Method used

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  • Method and system for transmission of dynamic bandwidth data frame
  • Method and system for transmission of dynamic bandwidth data frame

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Effect test

Embodiment 1

[0048] Figure 4 is a schematic diagram of a dynamic bandwidth data frame transmission method according to the preferred embodiment 1 of the present invention.

[0049] In a large-bandwidth channel, due to the different OBSS conditions around the sending station and the receiving station, their respective operating bandwidths are also different. When obtaining a transmission opportunity TXOP, the sending station and the receiving station can use the RTS / CTS mechanism for dynamic bandwidth. negotiation. The sending station performs channel idle detection at the PIFS interval before sending the RTS, and judges that the current available bandwidth is 80MHz, that is, sends the RTS on the 80MHz bandwidth for channel reservation. The sending site calculates the channel reservation time information Duration according to the data to be sent, the possible response time length and the appropriate inter-frame interval, and carries it on the RTS frame, and also carries the requested send...

Embodiment 2

[0052] Figure 5 is a schematic diagram of a dynamic bandwidth data frame transmission method according to the second preferred embodiment of the present invention.

[0053] Same as the preferred embodiment 1, when the sending station continues to send data after the bandwidth negotiation RTS / CTS is completed, that is, the sending of data frame1 does not receive an ACK1 confirmation response after waiting for a specific time interval, then after sending the PIFS interval of data frame1 Retransmit data frame1. Since the retransmitted data frame1 starts to be sent within the channel reservation time, the sending station retransmits data frame1 and completes the retransmission of the data frame, that is, completes the retransmission of data frame1 and the new ACK acknowledges receipt of a frame. Since the end time of the retransmission of the data frame has exceeded the channel reservation duration and exceeded the TXOP limit, the sending opportunity ends after the retransmissio...

Embodiment 3

[0055] Image 6 is a schematic diagram of a dynamic bandwidth data frame transmission method according to the third preferred embodiment of the present invention.

[0056] Same as the preferred embodiment 1, since the start sending time of data frame1 is within the channel reservation duration, when the sending station continues to send data after the bandwidth negotiation RTS / CTS is completed, that is, the sending of data frame1 is not received after waiting for a specific time interval Until ACK1 confirms the response, this transmission fails. Since this transmission has exceeded the channel reservation time and exceeded the TXOP limit, this transmission is ended, and the normal backoff process is performed again, and retransmission is performed after obtaining the next sending opportunity.

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Abstract

The invention discloses a method and system for transmission of dynamic bandwidth data frame. The method comprises that a transmitting site sends a channel reservation request supporting dynamic bandwidth to a receiving site; the transmitting site receives a dynamic bandwidth channel reservation confirmation from the receiving site; within transmission duration indicated by the dynamic bandwidth channel reservation conformation, the transmitting site adopts transmitting bandwidth information which is not more than that indicated by the dynamic bandwidth channel reservation confirmation, to transmit data wireless frames with the receiving site, and continues to transmit the data wireless frames when exceeding the transmitting duration indicated by the dynamic bandwidth channel reservation confirmation. The method and the system of the invention can reduce cost and enhance data transmitting efficiency in dynamic bandwidth.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a dynamic bandwidth data frame transmission method and system. Background technique [0002] At present, in the wireless network field, the wireless local area network (WLAN) develops rapidly, the requirement for WLAN coverage is increasing day by day, and the requirement for throughput is also getting higher and higher. In the IEEE802.11 group of the Institute of Electrical and Electronics Engineers industry specification, a series of standards such as 802.11a, 802.11b, 802.11g, etc. have been defined successively. Specifications for technological improvement, for example, the 802.11n task group puts forward the requirement of high throughput (High throughput, referred to as HT), supporting a data rate up to 600Mbps, and the 802.11ac task group further proposes the concept of VHT (Very High throughput), by introducing more The large channel bandwidth increases the data rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04W28/18
Inventor 吕开颖孙波李楠
Owner ZTE CORP
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