Transmission method and network appliance for multimedia broadcast multicast service

A technology for multimedia broadcasting and multicasting services, applied in the field of transmission methods and network equipment for multimedia broadcasting and multicasting services, capable of solving problems such as limited downlink resources and low signal-to-noise ratio

Inactive Publication Date: 2009-01-07
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the downlink resources on the network side are limited and cannot provide high enough downlink transmit power for the high-speed transmission of MBMS services, so the SNR of MBMS service transmission is lower than that of ordinary...

Method used

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  • Transmission method and network appliance for multimedia broadcast multicast service
  • Transmission method and network appliance for multimedia broadcast multicast service
  • Transmission method and network appliance for multimedia broadcast multicast service

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0142] figure 1 A flow chart of the MBMS service transmission method in this embodiment is shown. see figure 1 , the method includes: in step 101, according to the principle of the strongest channel independence, determine the space channel for transmitting the MBMS service in each time period; in step 102, send the MBMS service to the receiving end on the space channel corresponding to each time period data.

[0143] Since the spatial channels for transmitting MBMS services between different time periods have strong independence, that is, the correlation between these spatial channels is the smallest, so their fading characteristics are also different. When MBMS data is transmitted on spatial channels with different fading characteristics, the probability of large losses in all spatial channels is low, and the receiving end can obtain diversity gain to resist fading, thereby obtaining MBMS with high SNR Signal. The time period here may be a time slot, a subframe, or a rad...

Embodiment 2

[0145] In this embodiment, the smart antenna system is used as an application environment, and the spatial channel of each time period is determined by selecting the sequence of transmitting antennas with the smallest average correlation.

[0146] figure 2 A schematic diagram of the structure of the smart antenna system is shown. see figure 2 , in the smart antenna system, for the downlink direction, the transmitting end of the network side has multiple transmitting antennas, for example: antenna A1 to antenna A8, while the receiving end has only one receiving antenna; and, the distance between each transmitting antenna and the receiving antenna Each of them forms a spatial channel.

[0147] image 3 A flow chart of the method for MBMS service transmission in this embodiment is shown. see image 3 , the method includes:

[0148] In steps 301-302, the total number of transmitting antennas and all arrangement orders of transmitting antennas are determined, and the channe...

Embodiment 3

[0160] In a code division multiple access (CDMA) system, 16 code channels are also used for data transmission, so for a MBMS service, this embodiment can select multiple transmission frames with the strongest independence in the same time period The antennas work at the same time, and each antenna corresponds to non-overlapping code channels, and also makes two groups of transmitting antennas in adjacent time periods have the minimum correlation. Figure 6 A flow chart of the method for MBMS service transmission in this embodiment is shown. see Figure 6 , the method includes:

[0161] In step 601, determine the total number of transmitting antennas and the number of transmitting antennas in the same time period, select from all transmitting antennas according to the number of transmitting antennas in the same time period, and obtain multiple sets of transmitting antenna combinations.

[0162] Assume that the transmitting end has N transmitting antennas arranged linearly at ...

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Abstract

The invention discloses a transmission method for multimedia broadcast and multicast service (MBMS), which includes the following steps: according to the principle that a channel has the strongest independence, spatial channels for transmitting the MBMS service in various periods of time are determined; on a spatial channel corresponding to each period of time, the MBMS service data is sent to a receiving terminal. The invention also discloses a network device which is used for transmitting the MBMS service. By adopting the technical proposal of the invention, the transmission property of the MBMS service can be effectively improved, and the coverage area of MBMS districts can be further enlarged.

Description

technical field [0001] The invention relates to data transmission technology in mobile communication, in particular to a multimedia broadcast and multicast service (MBMS) transmission method and network equipment. Background technique [0002] The rapid development of mobile communication technology, the widespread use of mobile communication networks and the rapid growth of the number of mobile communication users make MBMS technology one of the hot technologies in mobile communication networks. MBMS is a technology based on the mobile communication cellular network system, which can realize high-speed multicast and broadcast of multimedia services, thereby realizing the sharing of network resources and providing services for as many multimedia users with the same needs as possible with as few resources as possible . [0003] When transmitting MBMS services, if the broadcast method is adopted, the network side broadcasts the MBMS service data to be transmitted to the cell ...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L69/14
Inventor 王健康薛强李克
Owner TD TECH COMM TECH LTD
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