Multiservice transmission method for physical layer component channel based on bit level

A physical layer sub-channel and physical layer channel technology, applied in the field of digital information transmission, can solve the problem of low overall spectral efficiency and achieve the effect of meeting the requirements of quality of service

Active Publication Date: 2013-02-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to propose a new multi-service transmission method to make up for the low overall spectral efficiency of layered mod

Method used

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  • Multiservice transmission method for physical layer component channel based on bit level
  • Multiservice transmission method for physical layer component channel based on bit level
  • Multiservice transmission method for physical layer component channel based on bit level

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Embodiment 1

[0044] In order to make up for the fact that the traditional physical layer sub-channel technology does not consider the multiple protection levels of bits in the same constellation symbol, in order to enrich the resource allocation methods of multiple service transmissions and improve the overall transmission efficiency of multiple service transmissions. The flow chart of the multi-service transmission method based on the bit-level physical layer sub-channel of the present invention is as follows figure 1 As shown, it specifically includes the following steps:

[0045] A. According to the quality of service requirements of multiple services to be transmitted, the physical layer channel is divided at the symbol level to obtain the physical layer sub-channels at the symbol level;

[0046] Among them, in the baseband model of the communication system, the physical layer channel can be equivalent to a discrete symbol channel, and its input and output are equivalent to symbols, th...

Embodiment 2

[0055] This embodiment describes the application of the multi-service transmission method based on the bit-level physical layer sub-channel in the transmission system specified by the DVB-T2 standard. This embodiment is basically the same as Embodiment 1, the only difference lies in the following content.

[0056] The application scenario of this embodiment is DVB-T2. In the DVB-T2 standard, the traditional physical layer subchannel technology is used to divide the physical layer channel at the symbol level to obtain the physical layer pipeline (PLP), which is the physical layer subchannel of the symbol level in the present invention, wherein The signal space to which the symbol belongs is the time domain and the frequency domain. The specific division method of the physical layer channel is the prior art, and relevant documents can be referred to, and the present invention will not describe it in detail here.

[0057] In multi-service transmission, in order to show that the...

Embodiment 3

[0067] This embodiment describes the application of the bit-level physical subchannel-based multi-service transmission method in a transmission system based on TDS-OFDM technology. This embodiment is basically the same as Embodiment 1, the only difference lies in the following content.

[0068] The application scenario of this embodiment is a transmission system based on TDS-OFDM technology. In a transmission system based on TDS-OFDM technology, the traditional physical layer subchannel technology is used to divide the physical layer channel at the symbol level to obtain the physical layer subchannel of the symbol level in the present invention, wherein the signal to which the symbol belongs Space is time domain and frequency domain. The specific division method of the physical layer channel is the prior art, and relevant documents can be referred to, and the present invention will not describe it in detail here.

[0069] In the application of multi-service transmission, in ...

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Abstract

The invention provides a multiservice transmission method for a physical layer component channel based on a bit level. The method comprises the following steps: A, dividing a physical layer channel at a symbol level according to service quality requirements of a plurality of services needed to be transmitted, so as to acquire a physical layer component channel at the symbol level; B, dividing the physical layer component channel of the symbol level at a bit level according to the service quality requirements of the plurality of services needed to be transmitted, so as to acquire a physical layer component channel on a bit layer; and C, using the physical layer component channel of the bit layer to transmit the corresponding service information. According to the multiservice transmission method disclosed by the invention, a bit with different protection degrees inside one symbol is subjected to physical layer component channels at different bit layers, so that service quality requirements of different services are satisfied more flexibly.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a multi-service transmission method based on bit-level physical layer sub-channels. Background technique [0002] In the application of digital TV terrestrial broadcasting transmission, in order to more effectively utilize spectrum resources and meet various service requirements, it is necessary to use the same physical layer channel to transmit multiple services. Different businesses have different requirements on the quality of service (QoS) of the system, where the quality of service includes coverage and data transmission rate. [0003] In traditional digital TV broadcast transmission systems, such as Digital Television Terrestrial Multimedia Broadcasting (DTMB) and Digital Video Cable Broadcasting (DVB-C), the transmission of multiple services is mainly through the transport stream (Transport stream, TS) level multiplexing is realized, that is, at t...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 彭克武金黄平宋健潘长勇杨知行
Owner TSINGHUA UNIV
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