Collocation method, data transmission method and device of multimedia broadcast and multicast service
A technology for multimedia broadcasting and multicasting services, applied in the field of data transmission methods and devices for multimedia broadcasting and multicasting services, capable of solving problems such as small combining gain, achieving the effect of improving link performance and increasing combining gain
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Publication Date
- 2009-11-11
- Estimated Expiration
- Not applicable · inactive patent
Smart Images
Figure 1 
Figure 2 
Figure 3
Abstract
Description
technical field
[0001] The invention relates to the communication field, in particular to a method for configuring a multimedia broadcast multicast service based on an orthogonal frequency division multiple access system, a data transmission method and a device for a multimedia broadcast multicast service. Background technique
[0002] With the rapid development of the network, a large number of multimedia services have emerged. At the same time, a variety of high-bandwidth multimedia services have emerged, such as video conferences, TV broadcasts, video on demand, advertisements, online education, and interactive games. At the same time, with the popularization of large-screen multifunctional mobile terminals (for example, mobile phones), mobile data services are more and more widely used, and people's demand for mobile communications is no longer satisfied with services such as telephone calls, messages, and mobile Internet access.
[0003] The rapid development of mobile ...
Examples
Embodiment 1
[0029] According to an embodiment of the present invention, a method for configuring an MBMS service is provided.
[0030] First of all, in the frame, when assigning a subframe in the radio frame as a multicast service subframe, the subframe already occupied by the system information cannot be occupied, for example: the first subframe in the general radio frame is used to transmit Synchronization information, so the first subframe cannot be configured as a multicast service subframe.
[0031] In the MBMS service configuration method according to the embodiment of the present invention: different subcarrier intervals are configured for the unicast service subframe and the multicast service subframe in the radio frame.
[0032] Through the technical solution provided by the embodiment of the present invention, the combining gain of the overlapping part of the adjacent cells is increased, and the link performance of the cell edge users is improved.
[0033] Preferably, the subca...
Embodiment 2
[0055] Figure 4 It is a detailed processing flowchart of the data transmission method of the MBMS service according to the method embodiment of the present invention, as Figure 4 As shown, the method includes the following steps:
[0056] In step S402, the sending end performs cyclic redundancy check (Cyclic Redundancy Check, CRC for short), channel coding, and IFFT on the data to be transmitted, inserts the CP, and sends it to the terminal.
[0057] Different from the unicast service, the number of IFFT points here is specified corresponding to the subcarrier interval of the multicast service subframe, and the length of the inserted CP is also the CP length corresponding to the multicast service subframe.
[0058] Step S404, the receiving end learns the specific location of the MBMS service subframe from the control information or agreed conditions, obtains the corresponding MBMS data from the indicated subframe, performs FFT transformation of corresponding points, and the...