68results about How to "Improve broadcast efficiency" patented technology

The invention discloses a data broadcasting method based on the finite set network code ARQs and for large-scale receiving ends. The method comprises the following steps that (1) a base station broadcasts data packets; (2) the receiving ends conduct decoding and calculate the decoding gain of each preset network coding scheme according to the decoding satiations, and then the serial number of the scheme with the largest decoding gain is fed back; (3) the base station determines the network coding scheme adopted into the current retransmission by counting feedback information of the receiving ends. According to the data broadcasting method, the finite set network coding schemes need to be pre-set in the base station and at the receiving ends and the finite set network codes preset ARQs are introduced in broadcast communications, therefore, the amount of feedback information is reduced, the average number of retransmission times of the data packets is reduced, the broadcast communication efficiency is improved, and the problems that in an existing broadcast retransmission technology, the retransmission efficiency is low and the number of feedback information is too large under the condition that a large number of receiving ends exist are mainly solved.

The invention discloses a data broadcast ARQ method based on maximum-minimum network encoding. The method comprises the following steps: base stations broadcasting data packets; users decoding the data packets and feeding the correct decoding conditions of the data packets to the base station; the base stations performing maximum-minimum network encoding on lost original information to generate network encoding data packets and retransmitting the network encoding data packets, and the users feeding data packet conditions recovered at a retransmission stage back to the base stations; and repeating step 3) until all the users receive all the data packets correctly. The number of the network encoding packets formed by use of the maximum-minimum network encoding method provided by the invention is equal to the number of the lost data packets of the users losing the largest number of the data packets. Therefore, the maximum-minimum network encoding method can preferentially guarantee that the users losing the largest number of the data packets can obtain maximum network encoding gains. The method provided by the invention has the advantages of small average retransmission frequency, high broadcast efficiency and the like, thereby being able to be well applied to a wireless data broadcast scene.

The embodiment of the present invention discloses a directing method, including: obtaining guest information of a target studio, the guest information including the room identification number of the guest room; generating a director configuration file according to the guest information of the target studio; The broadcast guide configuration file is sent to the broadcast guide terminal, so that the broadcast guide terminal performs a broadcast guide operation based on the broadcast guide configuration file. The embodiment of the present invention generates the guide configuration file of the target studio by acquiring guest information, etc. Based on the guide configuration file, the guide operation can be performed in the guide terminal. The operation process is simple and the guide efficiency is high. Low-cost and pure software-based transition switching function. Moreover, it does not rely on the physical equipment, reducing equipment costs and labor costs.

The invention discloses a method for improving the broadcasting efficiency of CSNP messages in the IS-IS routing protocol. After the DIS in the broadcasting network is elected, the DIS itself sets a variable Time, which is initialized and cleared to zero; the variable Time is used to record the received representation The new LSP time of the network topology change; when the DIS receives the new LSP1 representing the network topology change at time X, it immediately updates its own LSP database and sets Time to the current time X; after a delay of 10 seconds, it sends the CSNP report message, and clear the Time; if within 10 seconds, the DIS does not receive a new LSP message, it will send a specific Hello message to all neighbors to maintain the connection relationship. The Hello message is used to indicate that the current network topology does not any changes. The method for improving the broadcasting efficiency of the CSNP message in the IS-IS routing protocol of the present invention has the advantages of reducing the number of times of sending the CSNP message, reducing the bandwidth occupation of the CSNP broadcast message, improving the broadcasting efficiency, and the like.