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Retransmitting method of broadcasted data in network of single frequency

A technology of broadcasting data and single frequency network, which is applied in the fields of data exchange details, digital transmission systems, and devices for branch offices to provide special services, to achieve the effect of overcoming the waste of spectrum resources

Active Publication Date: 2008-10-15
福建省永阳国有资本投资集团有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0013] In order to overcome the waste of spectrum resources existing in the retransmission data of the existing SFN broadcast network, it is possible to use the two-way link of the mobile communication base station to the terminal only for those terminals that need to retransmit without terminating the current SFN broadcast service. Retransmitting the broadcast data on the SFN network, the present invention provides a method for retransmitting the broadcast data of the single frequency network, which, on the basis of resource aggregation and use, allows the bidirectional link in the mobile communication base station to undertake the broadcasting of the MBMS single frequency network Data retransmission, thereby overcoming the waste of spectrum resources existing in the retransmission data of the existing MBMS SFN network, and retransmitting only those terminals that need to be retransmitted under the premise of not terminating the current MBMS service broadcast

Method used

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  • Retransmitting method of broadcasted data in network of single frequency
  • Retransmitting method of broadcasted data in network of single frequency
  • Retransmitting method of broadcasted data in network of single frequency

Examples

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no. 1 example

[0043] Fig. 2 is a schematic diagram of the principle of using a two-way communication channel to realize broadcast data retransmission of a single frequency network according to the first embodiment of the present invention, wherein the MBMS system with a dedicated downlink carrier and the TDD mobile communication system are used.

[0044] The process of realizing retransmission of SFN broadcast data by using a two-way channel will be described in detail below with reference to FIG. 2 .

[0045] First, the terminal sends a retransmission request signal to the base station through the mobile communication spectrum f1. When the terminal receives incorrect broadcast data sent by the SFN network on the downlink f2 frequency spectrum, the terminal sends a retransmission request signal to the base station within the uplink time period on the f1 frequency spectrum.

[0046] Among them, there are two options for the time when the terminal sends the retransmission request. One is to i...

no. 2 example

[0057] Fig. 3 is a schematic diagram of the principle of realizing retransmission of SFN broadcast data by using a two-way communication channel according to the second embodiment of the present invention.

[0058] As shown in Figure 3, the frequency f1 is the two-way frequency spectrum used by the TDD mobile communication base station; the frequency f2 is the downlink dedicated carrier used by the SFN broadcast. The different SFN broadcast services sent on f2 form a superframe with a time length of 1 second in a time-division multiplexed manner. In this superframe, there are 4 outer frames with a time length of 240ms, and each outer frame contains a The time slots for the terminal to provide the broadcast service are the time slots 301a to 301d, and the interval between the time slots is 240ms. On f1, corresponding to the superframe with a length of 1 second on f2, there are 100 radio frames 302 working in TDD mode.

[0059] Terminals receiving SFN broadcast services receive...

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Abstract

The invention provides a method for retransmitting broadcasting data of a single frequency network, which comprises the steps that: step S102, a terminal retransmits request signals towards a base station under a preset condition at a preset time by the upstream period of a first mobile communication spectrum; step S104, the base station sends control signals required by data retransmission to the terminal by the downstream period of the first mobile communication spectrum; step S106, the terminal receives retransmission data sent by a second mobile communication channel according to the control signals. Therefore, the invention solves the problems of spectrum resource waste existing in the data retransmission in the present MBMS SFN network and can retransmit broadcasting data on the SEN network to the terminal which requires retransmission by using the two-way link of the mobile communication base station without stopping the present MBMS SFN service broadcasting.

Description

technical field [0001] The present invention relates to the field of wireless communication, more specifically, to a method for retransmitting broadcast data of a single frequency network. Background technique [0002] Currently, in the discussion of the third generation (3rd Generation: 3G) Long Term Evolution (LTE: Long Term Evolution) initiated by the 3rd Generation Partnership Project (3rd Generation Partnership Project: 3GPP), a single frequency network (Single frequency network: SFN) is used The realization of Multimedia Broadcast Multicast Service (Multimedia Broadcast Multicast Service: MBMS) is a technology that has received extensive attention. [0003] For example, in the proposal submitted to 3GPP in September 2006 with the proposal number R1-062268 and titled "Using Common Waveforms and Dedicated Carriers to Realize MBMS: Dedicated MBMSCarrier Using Common Transmitted Waveforms," ​​a proposal using a dedicated Downlink carrier to realize the method of MBMS. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00H04L12/18
Inventor 刁心玺
Owner 福建省永阳国有资本投资集团有限公司
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