Layered transmission method for multimedia broadcast and multicast business
A technology for multimedia broadcasting and multicasting services, applied in the field of layered transmission of multimedia broadcasting and multicasting services, which can solve problems such as receiving information errors and data transmission interference, and achieve efficient and reliable data transmission
Inactive Publication Date: 2009-03-04
ZTE CORP
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In digital communication, the transmission of data in the channel will be disturbed by noise, resulting in errors in received information
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[0038] The present invention provides a layered transmission method for multimedia broadcast and multicast services. Based on channel coding and decoding, modulation / demodulation, and multi-antenna technology, the layered transmission method can be effectively combined with multi-day technology and HARQ. Improve system performance and throughput. Specific embodiments are described in detail below, but not as a limitation to the present invention.
[0039]The general content of the sending method of the present invention is at first layered (recording this layering as the first layering) for the MBMS service data to be transmitted, and the audio and video data of the data are separated, and then the audio and video data are respectively Independent encoding, respectively layering the audio and video encoded data (record this layering as the second layering), the second layering is the system bit (denoted as S1) and the encoded audio data The parity bit (P1) is separated, and t...
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The invention discloses a layered transmitting method of multimedia broadcasting and multicasting service. The layered transmitting method is based on channel coding and decoding, modulation / demodulation, and multi-antenna techniques, and consists of two sections, namely, sending and receiving. The sending method of the layered transmitting method comprises the steps that: the data for transmitting the multimedia broadcasting and multicasting service is divided into two layers to carry out separate coding according to video frequency data and audio frequency data, and the video frequency data and the audio frequency data after coding are layered, and key bits acting on decoding of a receiving end are divided to the first layer, while other bits to the second layer; and after a second layering is conducted to the video frequency data and the audio frequency data, two layers of the data are separately conducted with length marching and modulation, then the first layer data after modulation is sent by a more reliable means, and later the second layer data after modulation is transmitted by a high efficient method. The receiving method of the layered transmitting method comprises the steps that: estimation, inspection, modulation and multi-antenna processes are carried out to a channel, and the first layer data and the second layer data are received to carry out channel decoding with the integration of HARQ (hybrid automatic repeated request) combining technology. The layered transmitting method improves system performance and throughput rate.
Description
technical field [0001] The invention relates to a method for reliably transmitting some key bit information in MBMS (Multimedia Broadcast and Multicast) services by combining channel coding and decoding technology, layering, modulation / demodulation technology, multi-antenna technology, and HARQ technology, especially related to wireless In the field of data transmission, a layered transmission method for multimedia broadcasting and multicasting services based on channel coding and decoding technology, layering, modulation / demodulation technology, multi-antenna technology, and HARQ technology. Background technique [0002] The next generation of wireless communication systems will provide better voice quality and faster data transfer rates. However, the time-varying multi-path transmission environment, limited bandwidth resources and users' demands on services make it very difficult to realize the above requirements. An effective way to solve these problems is to adopt diver...
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IPC IPC(8): H04Q7/22H04L1/00H04L1/18H04B7/04
Inventor 苟伟史凡
Owner ZTE CORP