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A same-frequency networking method for providing multimedia broadcast and multicast services

A technology for multimedia broadcast and multicast services, which is applied in the networking field of providing multimedia broadcast and multicast services in the community. It can solve problems such as inter-cell co-channel interference and unguaranteed service quality, and achieve high spectrum utilization.

Inactive Publication Date: 2011-11-30
ZTE CORP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when multiple cells use the SCCPCH channels transmitted by omnidirectional antennas to carry out continuous coverage of MBMS services, it will cause serious co-channel interference between cells, so that the quality of service cannot be guaranteed

Method used

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  • A same-frequency networking method for providing multimedia broadcast and multicast services
  • A same-frequency networking method for providing multimedia broadcast and multicast services
  • A same-frequency networking method for providing multimedia broadcast and multicast services

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Embodiment Construction

[0016] In order to solve the same-frequency interference problem between cells in the same-frequency networking, three methods can be adopted: one is to use multi-cell joint detection on the UE side to eliminate the same-frequency interference; the other is to use some networking strategies to avoid the same-frequency interference. The first method will undoubtedly sharply increase the complexity of the terminal, and its actual effect depends on the capabilities of the UE. The second method is to sacrifice part of the system capacity in time, space or frequency domain in exchange for the avoidance of co-channel interference. The third is to change the existing transmission mode of the system in terms of service transmission on the system side, so that when the signals of multiple cells in the same frequency network reach the user equipment (UE), they are no longer interference but useful signals. The present invention is a networking method based on the third service transmiss...

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Abstract

A method for co-frequency networking that provides multimedia broadcast and multicast services, comprising the following aspects: (a) for cells in a continuous coverage area, divide the cells to which they belong into multicast groups or broadcast areas; (b) for multicast groups Or the cell in the broadcast area selects the frequency and time slot for carrying multimedia broadcast and multicast service MBMS, and the frequency and time slot of the cell in the same multicast group or broadcast area are the same; (c) is the multicast group or broadcast area Assign MBMS service scrambling codes. Different multicast groups or broadcast areas use different MBMS service scrambling codes. Cells in the same multicast group or broadcast area use the same MBMS service scrambling codes; (d) Each cell uses its own multicast group or the MBMS service scrambling code in the broadcast area to transmit the MBMS service on the frequency and time slot selected in step (b).

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a networking method for providing multimedia broadcast and multicast service (MBMS: MultimediaBroadcast / Multicast Service) in a time division synchronous code division multiple access (TD-SCDMA) system. Background technique [0002] Currently, with the commercialization of the third generation mobile communication system, the mobile TV service (Mobile TV) is getting more and more attention from operators. Adopting MBMS to bear the weight of TV business in the TD-SCDMA system has also become an urgent demand. [0003] There are some problems in providing MBMS business in TD-SCDMA system. The point-to-multipoint traffic channel (MTCH) in MBMS point-to-multipoint (PTM) mode is mapped to the forward access channel (FACH), and finally carried on the secondary common control physical channel (SCCPCH). The physical channel SCCPCH is transmitted using an omnidirectional antenn...

Claims

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Application Information

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