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Multi-service transmission method based on physical layer sub-channel division

A technology of physical layer sub-channels and transmission methods, which is applied in the field of multi-service transmission based on the division of physical layer sub-channels, can solve problems such as difficulty in taking into account differences in business requirements, and achieve the effect of improving transmission efficiency

Active Publication Date: 2014-04-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The multi-service transmission technology based on TS stream layer multiplexing has obvious defects. Since all services are processed with the same coding and modulation method, it is difficult to take into account the differences in requirements between services, especially when multiple services that need to be transmitted have different service qualities. In the case of mobile performance requirements, real-time requirements, and coverage requirements, it is difficult to provide an efficient coding and modulation scheme suitable for various types of services

Method used

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  • Multi-service transmission method based on physical layer sub-channel division
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  • Multi-service transmission method based on physical layer sub-channel division

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Embodiment 1

[0040] This embodiment discloses a multi-service transmission method based on physical layer sub-channel division, such as figure 1 As shown, the method includes:

[0041]S1. According to the system parameters and the first service requirements of each service, in the time domain, frequency domain and space domain, the constellation mapping symbol is used as the division unit, and the physical layer channel is divided to obtain one or more symbol-level physical layer sub-units. channel;

[0042] In step S1, the constellation mapping symbol adopts OFDM modulation; wherein, the constellation mapping symbol occupies a certain subcarrier on the time domain data block after subsequent processing; different time domain data blocks have the same subcarrier spacing or different subcarrier spacing.

[0043] Wherein, the subcarrier intervals of the time domain data blocks occupied by constellation mapping symbols in the same symbol-level physical layer subchannel are the same.

[004...

Embodiment 2

[0061] The application scenario of this embodiment is an integrated multimedia broadcasting system based on China's digital TV terrestrial broadcasting standard. data business. Among them, the high-definition TV service and the standard-definition TV service are fixed reception, and the high-definition TV service requires a high transmission data rate; the standard-definition TV service requires a medium transmission data rate. The mobile phone TV service and the mobile phone data service are mobile reception, among which the mobile phone TV service has lower requirements on the transmission rate; the mobile phone data service has lower requirements on the transmission rate.

[0062] This embodiment specifically discloses a multi-service transmission method based on physical layer sub-channel division, the method comprising:

[0063] S1. According to the system parameters and the first service requirements of each service, in the time domain, frequency domain and space domain...

Embodiment 3

[0087] This embodiment is oriented to a wireless communication multi-service system, the system bandwidth is 8MHz, and service transmission for multiple users is provided in the 735MHz-743MHz frequency band, including high-speed mobile services 1A and 1B for user 1 and high-speed mobile service 2 for user 2 , high-speed mobile service 3 for user 3, low-speed mobile service 4 for user 4, low-speed mobile service 5 for user 5, and fixed reception service 6 for user 6. Among them, the low-speed mobile service 4 is a real-time service, and other services are non-real-time services.

[0088] This embodiment specifically discloses a multi-service transmission method based on physical layer sub-channel division, the method comprising:

[0089] S1. According to the system parameters and the first service requirements of each service, in the time domain, frequency domain and space domain, the constellation mapping symbol is used as the division unit, and the physical layer channel is d...

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Abstract

The invention discloses a multi-service transmission method based on physical layer sub-channel division. The method comprises the following steps: S1, dividing a physical layer channel into one or more symbol-level physical layer sub-channels in the time domain, the frequency domain and the space domain with constellation mapping symbols as the unit of division according to system parameters and a first service requirement of services; dividing each symbol-level physical layer sub-channel into one or more bit-level physical layer sub-channels in the time domain, the frequency domain and the space domain with the bits in the constellation mapping symbols as the unit of division according to a second service requirement of the services; S3, using each bit-level physical layer sub-channel to carry information of the corresponding service; and S4, transmitting the constellation mapping symbols of all the symbol-level physical layer sub-channels.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-service transmission method based on physical layer sub-channel division. Background technique [0002] With the continuous development of information technology, people's communication needs show more and more multi-service characteristics such as mobility, personalization and diversity. However, available spectrum resources in the field of communication, especially wireless communication, are extremely limited. Therefore, one of the core issues of the future communication system is how to more effectively use the available spectrum resources of the system to support the transmission of multiple services in different environments, so as to meet the growing demand for multi-service transmission. [0003] At present, Digital Television Terrestrial Multimedia Broadcasting (DTMB) adopts a multi-service transmission technology based on transport stream (TS) layer mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00
Inventor 彭克武颜克茜杨昉金黄平宋健
Owner TSINGHUA UNIV
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