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Adaptive multimedia multipath resource distribution method in a multi-carrier communication system

A multimedia multicast and multi-carrier communication technology, applied in the field of adaptive multimedia multicast resource allocation, can solve problems such as limited system performance and limitations

Inactive Publication Date: 2011-03-02
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, because this technology allocates resources according to the user with the worst channel state in the group, its system performance is limited by this user; in addition, because this method assumes that the number of bits that can be transmitted on the subcarrier is a continuous value, the modulation order in the actual system The numbers are all discrete values, so this method is greatly limited in practical applications

Method used

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  • Adaptive multimedia multipath resource distribution method in a multi-carrier communication system

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Embodiment 1

[0033] Use multiple description codes at the sending end; assume that all subcarriers are allocated with equal power; after using multiple description codes, subcarriers are not necessarily allocated to all users in the multicast group.

[0034] Embodiments of an adaptive multimedia multicast resource allocation method in a multi-carrier communication system of the present invention will be described below with reference to the accompanying drawings.

[0035] Investigate and adopt the method of the present invention and adopt literature U.S. " International Institute of Electrical and Electronics Engineers International Communication Conference Proceedings " ("Dynamic Power and Subcarrier Allocation for OFDMA-Based Wireless MulticastSystems" IEEE ICC 08, Beijing: 2008, 2607-2611.) The continuous bit resource allocation algorithm (RAA-CB) introduced, the comparison of the system spectrum efficiency:

[0036] In this embodiment, the noise variance σ 2 Normalized to 1; the chann...

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Abstract

The invention discloses an adaptive multimedia multipath resource distribution method in a multi-carrier communication system, which is characterized in that sub-carrier distribution is primarily determined according to channel gain status of subscriber on each sub-carrier on the basis of multi-description coding; maximum transmission rate distributed to each multi-path group by sub-carriers is computed by feature of the multi-description code, and sub-carrier distribution is regulated according to maximum transmission rate of each sub-carrier in different multi-path groups; finally power distribution is executed between sub-carriers. Using flexible decoding feature of the multi-description coding, the sub-carrier is only distributed to subscriber with higher partial channel gain in the multi-path group when distributed to one multi-path group, consequently the selection of the sub-carrier modulation order is not subjected to the limitation of subscriber with worst channel gain, so that the system spectrum efficiency is enhanced. The method supports the application on a plurality of multi-path groups, and discrete value of modulation order, thus high practicality is achieved.

Description

technical field [0001] The invention belongs to the technical field of resource allocation methods in mobile communication, in particular to an adaptive multimedia multicast resource allocation method in a multi-carrier communication system. Background technique [0002] In mobile communication, the quality of service obtained by a user is directly related to the channel state he is in. How to rationally allocate system resources to counter user channel fading and obtain satisfactory service quality is a key research issue in mobile communication. . "Dynamic Power and Subcarrier Allocation for OFDMA-Based Wireless Multicast Systems" IEEE ICC 08, Beijing: 2008, 2607-2611.) introduced a continuous bit resource allocation algorithm (RAA-CB). However, because this technology allocates resources according to the user with the worst channel state in the group, its system performance is limited by this user; in addition, because this method assumes that the number of bits that ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W72/04H04L27/26
Inventor 吴旭科邱玲孙群龙吴素文
Owner UNIV OF SCI & TECH OF CHINA
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