A scalability-focused resource allocation method for wireless body area networks based on node heterogeneity

Abstract

This invention discloses a scalability-focused wireless body area network (WBN) resource allocation method based on node heterogeneity, comprising: determining whether to pre-allocate backoff values ​​based on node priority and urgency; allocating backoff values ​​based on node transmission requests and allocated backoff values; determining the random backoff value selection range for nodes of different priorities based on the number of nodes at each priority level; determining the backoff value selection range for the contention retransmission phase based on the number of collisions during the contention phase; determining the size of the transmitted data packet based on the channel state and the amount of data in the buffer during transmission; determining the node transmission order based on the node's historical transmission status and node transmission priority; allocating the number of node transmission time slots based on the amount of data in the node's buffer and the predicted amount of data to be generated; and determining the node retransmission order and the allocation of retransmission time slots based on the node's transmission status. This invention allocates backoff values ​​based on the number of nodes and transmission requirements, making it suitable for networks with varying numbers of nodes, improving channel utilization and reducing contention collisions.

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