Transmission method and system for multimedia service signal of multicast broadcast

A multimedia service and multicast broadcasting technology, applied in the field of communication, can solve problems such as service performance degradation, achieve the effect of avoiding inter-symbol interference and improving service reception quality

Inactive Publication Date: 2012-07-04
ZTE CORP
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Problems solved by technology

In this case, the intersymbol interference between SCCPCH physical channels carrying the same MBMS service becomes a source of interference that cannot be ignored. Moreover, since SCCPCH is a public physical channel and does not use smart antennas, when carrying high-speed data services , the inter-symbol interference will lead to a significant decline in service performance

Method used

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  • Transmission method and system for multimedia service signal of multicast broadcast
  • Transmission method and system for multimedia service signal of multicast broadcast
  • Transmission method and system for multimedia service signal of multicast broadcast

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Embodiment Construction

[0015] The specific implementation of the present invention will be described in detail below by taking a Time Division Synchronization Code Division Multiple Access (TD-SCDMA for short) system as an example.

[0016] In order to implement the present invention, it is necessary to modify the 3GPP 25.221 (Physical channels and mapping of transport channels onto physical channels (TDD)) protocol, and the SCCPCH originally specified in the protocol is fixed to 16 The spreading factor is modified to be one of spreading factors 1 and 16.

[0017] Refer below figure 1 , illustrating a method for transmitting a multicast broadcast multimedia service signal according to an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0018] S102, when allocating radio resources for the MBMS service, the radio network controller (Radio Network Controller, RNC for short) allocates corresponding code channels to it according to the service ...

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Abstract

The invention discloses a method and a system for transmission of multicast broadcast multimedia service signals, wherein the method comprises the following steps that: S102, a wireless network controller selects spreading factors of channels for bearing the multicast broadcast multimedia service, and transmits to a node B and a user equipment a spreading code that is corresponding to the spreading factor; S104, the node B and the user equipment establish channels for bearing the multicast broadcast multimedia service at a network side and a terminal side respectively according to the spreading code; and S106, the node B spreads the multicast broadcast multimedia service signal in accordance with the spreading code and transmits the spread multicast broadcast multimedia service signal to the user equipment via the channels for bearing the multicast broadcast multimedia service at the network side and the terminal side. The invention can effectively avoid intercode interference betweencode channels that bear high-rate MBMS service, so as to promote quality of service reception.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a multicast broadcast multimedia service signal transmission method and system. Background technique [0002] In the third generation time division multiplexing (3G TDD) system, Multicast Broadcast Multimedia Service (MBMS for short), as an extremely important service, is widely used in the 3G system. In the TDD system, however, the physical channel carrying the MBMS service is the Supplementary Physical Common Channel (SCCPCH), which is a downlink physical channel, and its spreading factor is currently fixed at 16 (ie, SF=16). [0003] However, the fixed use of the spreading factor with SF of 16 is mainly because the SCCPCH is mainly used for cell common control information. In order to ensure the coverage and transmission power of the channel, it is necessary to spread the wireless signal transmitted by the physical channel to ensure the coverage and signal qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04W4/06H04W72/14
Inventor 陈晓斌吴明皓姚翠峰
Owner ZTE CORP
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