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Method for transmitting service in radio broadcasting system

A technology of wireless broadcasting and wireless resources, applied in broadcasting-related systems, broadcasting devices, multi-frequency code systems, etc., can solve the problem of low spectrum utilization, achieve the effect of improving flexibility and avoiding interference

Inactive Publication Date: 2007-04-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the existing multi-carrier systems are all broadband, the frequency band occupied by each frequency point has several megabytes of bandwidth, so this method has a low utilization rate of the spectrum

Method used

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  • Method for transmitting service in radio broadcasting system
  • Method for transmitting service in radio broadcasting system
  • Method for transmitting service in radio broadcasting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In the case of the cellular system, the cells of the digital wireless broadcasting system are covered by frequency reuse, and all cells within a frequency reuse range use the same frequency point F1. Assuming that the reuse coefficient of the system is K, the cell distribution within a frequency reuse range in the system is shown in Figure 4(a) and Figure 4(b), where K in Figure 4(a) is 4, and Figure 4(b) ) K is 7. Based on the above system architecture, it is assumed that the cell numbers of all cells within a frequency reuse range are X, and X takes a value from 1 to K.

[0047] During service multiplexing, all the subcarriers included in the system frequency point F1 are divided into K+1 subcarrier groups SCG(i), and the subcarrier group number i is 1, 2, ..., K+1.

[0048] Select the subcarrier group SCG (K+1) whose subcarrier group number i is K+1 as the common subcarrier group, and use the subcarriers in the selected common subcarrier group to transmit global ser...

Embodiment 2

[0058] For the cellular system, the cell distribution in the system is the same as that in Embodiment 1, and the multiplexing coefficient is K. The system time is divided into K+1 time slices TS(j), and the time slice number j is 1, 2, ..., K+1. Cells in the system use time-sliced ​​TS(j) to send services as follows:

[0059] Select the time slice TS(X) whose time slice number j is the same as the cell number X, and use all the subcarriers included in the system frequency point to bear and send the local service of the cell X in the time slice TS(X). Since the local services of each cell are carried and sent in different time slices, the user terminal will not be interfered by adjacent cells when receiving the local services at the border of the cell.

[0060] A time slice TS(K+1) whose time slice number j is K+1 is selected for synchronously sending global services of all cells. The sending principle of the global service is similar to that of the prior art, and will not be...

Embodiment 3

[0067] For the cellular system, the cell distribution in the system is the same as that in Embodiment 1, and the multiplexing coefficient is K. Divide wireless resources into two-dimensional time slice-subcarrier groups (TFG, TimeSlice-SubCarrier Group) according to the time domain and frequency domain, and each OFDM symbol can only be sent by one of the TFG(k), and the TFG(k) includes Corresponding time slices and subcarrier groups. The method for the cells in the system to use TFG(k) to send services is as follows:

[0068] Select the TFG(X) whose time slice-subcarrier group number k is the same as its own cell number X, and use the TFG(X) to send the local service of the cell X, that is, within the time slice corresponding to the TFG(X), use The subcarrier group corresponding to TFG(X) modulates and sends the local service data. Select the TFG(K+1) whose time slice-subcarrier group number k is K+1, and send global services of all cells.

[0069] For the large area system...

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PUM

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Abstract

The invention is concerned with the operation sending method in the wireless broadcast system, includes: the small section work in the system is on the same frequency point, divides the wireless resource on the frequency point into at least two sub-resources in advance, configures at least one sub-resource for each small section of the system as the sharing sub-resource, and configures at least one sub-resource for each small section as the special sub-resource, the sharing sub-resource and the special sub-resource are different; uses the sharing sub-resource to load and send the whole operation synchronously in all small sections, uses the configured special sub-resource to load and send the local operation in each small section. The invention can enhance the flexibility of the operation attempter at the condition of ensuring the frequency spectrum using rate.

Description

technical field [0001] The invention relates to wireless broadcast technology, in particular to a service sending method in a wireless broadcast system. Background technique [0002] At present, the wireless broadcasting system can provide users with broadcasting services such as MPEG-2 audio / video services, mobile multimedia services, and H.264 audio / video services. The specific process is shown in Figure 1: [0003] The service providing equipment generates multiple broadcast services and sends them to the transmitting station. The transmitting station performs multiplexing, scheduling, and coding processing on multiple broadcast services, and uses multi-carrier modulation for the coded service data, such as OFDM modulation, etc., and then transmits them on the air interface broadcast to user terminals. After the user terminal performs OFDM demodulation and decoding on the received data, it demultiplexes the broadcast service to be watched and presents it to the user. ...

Claims

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Application Information

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IPC IPC(8): H04H1/00H04L27/26H04H60/91
Inventor 吕林军张毅
Owner HUAWEI TECH CO LTD