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Polling grouping scheduling method in multi-source multi-relay cooperation network

A multi-source multi-relay, cooperative network technology, applied in the field of node selection and user scheduling scheme based on round-robin group scheduling, distributed space-time coding technology, and can solve problems such as poor results

Inactive Publication Date: 2013-10-16
CHINA JILIANG UNIV
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  • Polling grouping scheduling method in multi-source multi-relay cooperation network
  • Polling grouping scheduling method in multi-source multi-relay cooperation network
  • Polling grouping scheduling method in multi-source multi-relay cooperation network

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[0033] The specific implementation of the present invention will be described in detail below mainly in conjunction with the accompanying drawings.

[0034] The relay end adopts the AF scheme, and the load balancing relay grouping scheme based on round-robin group scheduling is as follows: define the set of relay nodes in the system as V, select K relay nodes to transmit information at the same time in each time slot, that is, from choose different relay nodes users form a relay node scheduling group set . The selection is grouped in a round-robin manner. set up for collection The index number in , that is, when =1, the selected trunk group is Group 1 in , and so on. set up , , is the source node After the first The sum of the signal-to-noise ratios that can be achieved at the destination after the group relay node transmits

[0035]

[0036] For the user from the source node to relay node The channel parameters of as a relay node to the d...

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Abstract

The invention discloses a polling grouping scheduling method in a multi-source multi-relay cooperation network. The method is combined with distributed time space coding. In the multi-source multi-relay cooperation network, there are two node cluster selections. A distributed two step node selection scheme is adopted. According to a polling grouping scheme and taking K relays as one group, the relay node polling is divided into several relay subsets. And the relay node reversely schedules an optimal source node user subset. During a scheduling process, fairness of all the users is guaranteed according to a polling scheduling algorithm. Through a coupling selection, a node selection process based on load balancing and the user fairness is realized. And then, the distributed time space coding is introduced to the selected relay node. According to the invention, on an aspect of relay selection grouping, extra signaling cost is not needed so that it is simple to realize; the load balancing of the relay is guaranteed and the transmission fairness of the users can be guaranteed too; practicality is possessed; after the distributed time space coding is introduced, a frequency spectrum utilization rate is increased and performance of the system is increased too.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a node selection and user scheduling method in a cooperative relay network, in particular to a node selection and user scheduling scheme based on round-robin group scheduling in a multi-source multi-relay cooperative network, and in the The relay end introduces distributed space-time coding technology. Background technique [0002] In wireless communication, diversity technology is the most effective method to eliminate channel interference caused by random fading. Cooperative communication is a promising scheme to achieve cooperative diversity in a distributed manner. Many collaboration methods have been proposed, including Amplify-Forward (AF, Amplify-Forward) and Decode-Forward (DF, Decode-Forward) schemes. Considering that in practical applications, it is more common that multiple source node users need to transmit signals at the same time, such as the multi-us...

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Application Information

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IPC IPC(8): H04W28/08H04W72/12H04L1/06
Inventor 李正权林贞冯艳
Owner CHINA JILIANG UNIV
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