Multicast resource scheduling method based on subcarrier combination

A technology of resource scheduling and sub-carriers, which is applied in the direction of multiple use of transmission paths, digital transmission systems, electrical components, etc., can solve the problem of low service rate, achieve the effect of not affecting system performance and reducing the complexity of pairing

Inactive Publication Date: 2014-11-05
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a multicast resource scheduling method based on subcarrier combination, which can improve the relatively low service rate in the current multicast system as much as possible by scheduling existing resources reasonably without adding additional system resource overhead. The problem

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  • Multicast resource scheduling method based on subcarrier combination
  • Multicast resource scheduling method based on subcarrier combination
  • Multicast resource scheduling method based on subcarrier combination

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[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0062] The core idea of ​​the present invention is to improve the problem of relatively low service rate in the current multicast system as much as possible by reasonably scheduling existing resources without adding additional system resource overhead; the present invention proposes a subcarrier-based combination A multicast resource scheduling method, which sends the same information on two subcarriers, uses the two subcarriers as one subcarrier (this is called "combining"), and combines them with the estimated maximum receiving ratio to obtain The worst user SNR of the user determines the transmission rate on the combined subcarrier; at this time, the combined transmission rate is higher than that when the two subcarriers send different information when they are not combined, so that when combined on the total multicast r...

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Abstract

The invention provides a multicast resource scheduling method based on subcarrier combination. The method comprises the following steps: sending same information to two subcarriers; using the two subcarriers as one subcarrier (named as 'combination'); and confirming a sending rate on the combined subcarriers according to a receiving SNR (Signal Noise Ratio) of the poorest user which is estimated after combining the received signals on the two subcarriers at the maximum ratio. According to the method, after the subcarriers are combined, a freedom degree of diversity gain is supplied, the combination / non-combination is self-adaptively selected, and the subcarrier pair scheduling and the power distribution between the subcarriers are optimized, so that the whole multicast service rate of the system is increased. According to the method provided by the invention, the problem of relative low service rate of the present multicast system is solved as far as possible by reasonably scheduling the present resources without adding the extra cost of the system resource. Meanwhile, the invention provides a simplifying method for the corresponding subcarrier pair and a decoupling method for the power distribution between the subcarriers.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a multicast resource scheduling method based on subcarrier combination. Background technique [0002] With the rapid development of wireless communication, users' demand is no longer limited to a single voice service; the demand for high-speed data services such as video on demand, music download and mobile TV is growing rapidly. With the increase of users, the traditional point-to-point mode has been unable to carry high-speed services such as multimedia. Multimedia broadcast / multicast technology (MBMS: Multimedia Broadcast and Multicast Service), with its efficient point-to-multipoint data transmission method, greatly improves the utilization of mobile network resources, and can well resolve the current high-speed multimedia services. It has become one of the hot technologies in the development of wireless communication systems. [0003] In a multimedia multica...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04W72/04
Inventor 陈志刚王凡森朱世华任品毅常培梁陈睿
Owner XI AN JIAOTONG UNIV
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