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Communication device and transmission parameter adjustment method

A technology of communication device and transmission parameters, applied in transmission monitoring, transmission system, wireless communication and other directions, can solve the problem of inability to accurately detect transmission collision, etc., and achieve the effect of improving transmission efficiency

Pending Publication Date: 2021-08-27
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a collision detection and transmission parameter adjustment mechanism applied in a communication device to solve the problem of inability to accurately detect transmission collisions in the traditional technology, and to effectively adjust subsequent Transferred parameters

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  • Communication device and transmission parameter adjustment method
  • Communication device and transmission parameter adjustment method
  • Communication device and transmission parameter adjustment method

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no. 1 example

[0027] According to the first embodiment of the present invention, the communication device 100 can operate in accordance with the CSMA or CA communication protocol stipulated in the 802.11 communication specification, and operate in a half-duplex transmission mode. That is, when the wireless transceiver 130 transmits a packet, it cannot simultaneously receive the packet.

[0028] Generally speaking, in a CSMA or CA communication environment, all transmission devices need to perform collision avoidance processing (CA) before sending packets, that is, to detect whether the channel is idle (Clear Channel Assessment, abbreviated as CCA). If it is idle, it waits for the Interval Frame Space (IFS) time to check whether it is idle again, and if it is idle, then it is judged that the packet can be sent.

[0029] When a communication protocol layer (for example, a medium access control (MAC) layer) in the wireless transceiver 130 determines that a packet can be sent through the above ...

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Abstract

The invention discloses a communication device and a transmission parameter adjustment method. The communication device comprises a wireless transceiver and a processor. The wireless transceiver is used for transmitting or receiving wireless signals and comprises a collision detection device. The collision detection device is used for detecting energy in a wireless transmission channel in a first time interval before the wireless transceiving device transmits a packet and correspondingly generating a detection result. The first time interval covers a time interval when the wireless transceiver is converted from a receiving state to a transmitting state. The processor is used for adjusting at least one transmission parameter according to the detection result.

Description

technical field [0001] The invention relates to a collision detection and transmission parameter adjustment mechanism applied in a communication device, in particular to a collision detection method capable of effectively detecting collisions, and a transmission parameter adjustment method capable of effectively reducing collisions according to detection results. Background technique [0002] Carrier Sense Multiple Access (CSMA for short) and Collision Avoidance (CA for short) are a way to avoid or reduce collisions in a wireless transmission system. However, CSMA and CA cannot completely avoid the impact of collision or interference on the entire transmission, especially in free channels such as 2GHz / 5GHz used by WiFi, because multiple different communication systems share limited bandwidth at the same time , and cannot detect each other, so collisions are more likely to occur. [0003] In order to reduce the occurrence of collisions, efficient detection of collision situa...

Claims

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Application Information

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IPC IPC(8): H04W24/04H04W24/08H04W74/08H04B17/382
CPCH04W24/04H04W24/08H04W74/0816H04B17/382
Inventor 张维轩郑绍余萧振铎郑璁骏
Owner REALTEK SEMICON CORP