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Method for updating broadcast parameters based on unidirectional transmission

A technology of parameter update and one-way transmission, which is applied in the direction of data exchange details, branch offices providing special services, etc. It can solve the problems of difficulty in guaranteeing the synchronization and reliability of broadcast parameter update time, confirmation frames occupying channel resources, and confirmation. Long time and other issues, achieve the effect of improving synchronization and reliability, saving channel resources, and improving efficiency

Active Publication Date: 2013-03-20
XIDIAN UNIV
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Problems solved by technology

[0004] The method for updating the broadcast parameters mentioned above realizes the reliable transmission of the broadcast parameters by using the confirmation mechanism, but since each receiving station must confirm the new broadcast parameters when using the confirmation mechanism, when the number of stations in the network is large, it is necessary to collect all confirmed It takes a long time, and the confirmation frame also occupies channel resources, which leads to a large delay and low efficiency in the process of updating the broadcast parameters, and at the same time, it is difficult to guarantee the synchronization and reliability of the broadcast parameter update time of each site

Method used

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  • Method for updating broadcast parameters based on unidirectional transmission
  • Method for updating broadcast parameters based on unidirectional transmission

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Embodiment 1

[0029] Embodiment 1 is a method for updating broadcast parameters in a positive counting manner. In Embodiment 1, the value of the number of times N of sending the broadcast frame A carrying the new broadcast parameters is 3; the value of the number of sending K of the broadcast frame B carrying the update moment of the broadcast parameters is 3; the broadcast frame defined in the network The sending period L is 10ms.

[0030] refer to figure 1 , the implementation steps of embodiment 1 are as follows:

[0031] Step 1. The sending station performs channel estimation on the channel characteristics in the network at the current moment, and determines the broadcast parameters that all receiving stations can demodulate according to the channel characteristics as new broadcast parameters.

[0032] 1a) The sending station periodically sends a channel detection frame to the receiving station. The channel detection frame is a frame generated by the physical layer of the network, and...

Embodiment 2

[0043] Embodiment 2 is a method for updating broadcast parameters in a countdown manner. In embodiment 2, the value of the number of transmissions N of the broadcast frame A carrying the new broadcast parameters is 3; the value of the number of transmissions K of the broadcast frame B of the update moment of the broadcast parameters carrying the broadcast parameters is 3; the broadcast frame defined in the network The sending period L is 10ms.

[0044] refer to figure 2 , the implementation steps of embodiment 2 are as follows:

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Abstract

The invention discloses a method for updating broadcast parameters based on unidirectional transmission, mainly solving the problems of low channel efficiency and large updating delay caused by determining the updated broadcast parameters by receiving sites in the existing method for updating the broadcast parameters. The method provided by the invention mainly comprises the following steps: performing channel estimating on sending sites, determining new broadcast parameters suitable for the current network; periodically broadcasting the new broadcast parameters to all the receiving sites by the sending sites for N times; periodically broadcasting the updating time of the broadcast parameters to all the receiving sites by the sending sites for N times in a forward counting means or a countdown means; and transmitting the broadcast data by all the sites by using the new broadcast parameters when the updating time of the broadcast parameters starts. The method is small in updating delay and high in efficiency, capable of improving synchronism and reliability of the updating time of the broadcast parameters, and can be used for Ethernet Eoc (Ethernet over Coax) communication based on a coaxial cable.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a method for updating broadcast parameters, in particular to a method for efficiently and reliably updating channel broadcast parameters when channel characteristics change in an Ethernet EoC communication system based on coaxial cables. In the field of EoC communication technology. Background technique [0002] In the modulated EoC communication system sharing the medium, point-to-point communication and broadcast communication between stations are generally supported. When performing point-to-point communication, the channel characteristics of the link between two stations are different from the channel characteristics of the link between any other stations, and the channel characteristics of the forward link and reverse link of the same station pair are also different. The same, so in point-to-point communication, the sending station needs to use the most efficient physic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18
Inventor 张冰黄粉张奭魏琼琼张晓娜魏星郭志宽周国菁刘长明王敏超
Owner XIDIAN UNIV
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