Opportunity multicast method for high-energy efficiency unicast and multicast mixed services based on superposed codes

Abstract

The invention discloses an opportunity multicast method for high-energy efficiency unicast and multicast mixed services based on superposed codes. The method comprises the following steps of: introducing a transmission scene model of soft real-time services of mixed unicast and multicast, superposing service data of unicast and multicast by employing a coding mode of the superposed codes so as to improve the resource utilization rate of the power and the frequency spectrum; transmitting the superposed data in an opportunity multicast mode so as to meet the quality of service (QoS) requirement of the two services; and caching the soft real-time services required by a user in a short time, providing a service transmission method for the user required for the same service in the caching time through broadcast so as to improve the resource utilization rate of the system; and meanwhile, calculating to acquire an optimized selection scheme of enhancement layer service in the superposed codes so as to optimize the energy efficiency of the multicast transmission method. The QoS of various services can be effectively guaranteed, the transmission efficiency and the throughput of the system are obviously improved, and the method is suitable for multiple wireless communication networks and has good popularization and application prospects.

Description

technical field [0001] The invention relates to an opportunistic multicast transmission method of high-energy-efficiency unicast and multicast mixed services based on superposition codes, and belongs to the technical field of wireless network energy efficiency optimization and planning. Background technique [0002] In recent years, wireless broadcast and multicast technology has been widely concerned because it can greatly improve the utilization of wireless spectrum. However, in the traditional broadcast process, the transmission power and transmission rate are determined by the worst user channel. For For users with better channel conditions, this phenomenon is undoubtedly a waste of resources. [0003] see figure 1 , introducing a new technology that can solve the above-mentioned problems—layered source coding based on multimedia services. The principle is to encode the original video data into a basic stream and an enhanced stream: the basic stream is for all users wi...

AI Technical Summary

Problems solved by technology

The opportunistic multicast transmission method is to select only users with a set ratio p (0<p<100%) for each transmission, so that the transmission power and transmission rate will be limited by the worst user channel conditions among the users with a set ratio; But its value must be far greater than the worst user channel condition in the broadcast transmission scheme, and the number of transmissions will be much smaller than the number of users in the unicast scheme

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