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Relay selection and power control method for efficient collaboration multicasting communication

A power control and high-efficiency technology, applied in power management, wireless communication, advanced technology, etc., can solve problems such as inability to guarantee, consume energy and time resources, and high system energy efficiency

Active Publication Date: 2014-08-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

Although existing researches are somewhat devoted to improving the data transmission rate of multicast communication, high system energy efficiency cannot be guaranteed.
Some introduce interactive signals between successful users and failed users, which can improve system energy efficiency to a certain extent, but need to allocate a certain time slot for interactive signals, thus consuming additional energy and time resources

Method used

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  • Relay selection and power control method for efficient collaboration multicasting communication
  • Relay selection and power control method for efficient collaboration multicasting communication
  • Relay selection and power control method for efficient collaboration multicasting communication

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specific Embodiment approach

[0060] figure 1 is the system model of the present invention.

[0061] Among them, the model adopted by the present invention divides each multicast block of cooperative multicast communication into two time slots. In the first time slot, the base station broadcasts a certain amount of data to each user within its coverage area, but due to signal Transmission in a wireless channel needs to experience shadow fading and multipath fading, some users can successfully receive data while others cannot. Therefore, based on whether the data is successfully received in the first time slot, the N users can be divided into two sets S and F, representing the successful user set and the failed user set respectively. In the second time slot, only successful users can forward data to failed users. In this way, the failed user has another chance to receive data in the second time slot. Since users are usually mobile users, when a successful user forwards data as a relay, it can only succes...

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Abstract

The invention belongs to the field of collaboration multicasting in the field of mobile communication, and particularly relates to a method for achieving efficient multicasting communication through the optimal relay probability and relay power. Each multicast in collaboration multicasting communication is divided into two time slots by an adopted model, in the first time slot, based on whether data are successfully received in the first time slot, N users which are evenly distributed are divided into two sets S and F, wherein the set S represents a successful user set, and the set F represents a failure user set; in the second time slot, successful users forward data to failure users. Compared with a traditional method, through the optimal relay probability Pa* and the optimal relay power value p11*, energy efficiency maximum of any data transmission rate supported in collaboration multicasting communication can be achieved.

Description

technical field [0001] The invention belongs to the field of coordinated multicast in the field of mobile communication, and in particular relates to realizing efficient multicast communication through optimal relay probability and relay power. Background technique [0002] Multicast communication is an effective solution for realizing one-to-many wireless, and it is mainly used in multicast services such as Internet Protocol Television (IPTV) and Mobile TV (Mobile TV). In these services, different users require the same information, and the wireless channel has a broad characteristic. Therefore, the base station can use the same frequency to serve these users at the same time, thereby obtaining higher spectrum efficiency. [0003] In practice, users are usually in different locations and some users may get higher data rates while others may get lower data rates. This data rate imbalance becomes a major problem in multicast communication. In order to meet the relay probabi...

Claims

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Application Information

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IPC IPC(8): H04W40/22H04W52/46
CPCY02D30/70
Inventor 赵国栋石伍昱周文丽陈智李少谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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