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Method, device and system for accessing to multimedia broadcasting multicast system

A broadcast channel and pilot configuration technology, which is applied in the direction of synchronization device, broadcast service distribution, communication between multiple stations, etc., can solve the problem of no conversion point and so on

Active Publication Date: 2009-12-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, when there is no uplink subframe in the subframe ratio, and the uplink and downlink subframe ratio is 0:10, there is no conversion point in the system

Method used

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  • Method, device and system for accessing to multimedia broadcasting multicast system
  • Method, device and system for accessing to multimedia broadcasting multicast system
  • Method, device and system for accessing to multimedia broadcasting multicast system

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Embodiment Construction

[0035] The inventors of the present invention found that when accessing the MBMS dedicated carrier system through the SFA dedicated synchronization channel, the system can only provide the user equipment with information related to the SAF identity, but cannot provide the user equipment with information about the single cell identity of its uplink feedback cell. information. When the user equipment needs to perform service feedback in a single cell, it cannot correctly select parameters and send information, such as: random access sequence, cell power control required for uplink transmission, etc.

[0036] Although the user equipment can obtain information related to the identity of a single cell when using a single-cell dedicated synchronization channel to access the MBMS dedicated carrier system, it cannot obtain SFA-related identity information required for receiving MBMS services. Since the MBMS broadcast information is scrambled with the SFA identifier, the user equipment...

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Abstract

The embodiment of the invention provides a message sending method and a method for accessing to a multimedia broadcasting multicast system. User equipment, a base station and a communication system can access to an MBMS special carrier system with uplink feedback. The embodiment of the invention provides a message of an identifying cell needed by the MBMS special carrier system with the uplink feedback for the user equipment accessing to the MBMS special carrier system by mapping a synchronization channel carrying an identifying message and a newly added additional synchronization channel into a frame structure so as to make the user equipment access to the MBMS special carrier system with the uplink feedback.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method, device and system for accessing a multimedia broadcast multicast system. Background technique [0002] During the synchronous access process, the system needs to be accessed through a synchronous channel. Generally, the synchronization channels include PSC (Primary Synchronization Channel, primary synchronization channel) and SSC (Secondary Synchronization Channel, secondary synchronization channel). [0003] Usually, the synchronization channel is mapped on the center subcarrier of the OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplex) symbol of the subframe in the frame structure. [0004] In one radio frame (radio frame), it usually includes 10 subframes (subframe) with a length of 1 ms. Wherein, when there is no uplink subframe in the subframe ratio and the uplink and downlink subframe ratio is 0:10, there is no conversion p...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04W4/06H04W56/00
Inventor 王俊伟范霄安李博
Owner HUAWEI TECH CO LTD