6533b856fe1ef96bd12b283c

RESEARCH PRODUCT

Optimal Buffer Resource Allocation in Wireless Caching Networks

Feng ShuTapani RistaniemiZheng ChangTingting LiuJun LiZhu Han

subject

Scheme (programming language)Service (systems architecture)Hardware_MEMORYSTRUCTURESOptimization problembusiness.industryComputer scienceNode (networking)020302 automobile design & engineering020206 networking & telecommunications02 engineering and technologyoptimal buffer resource allocationwireless caching networksBuffer (optical fiber)langaton tiedonsiirto0203 mechanical engineeringoptimointi0202 electrical engineering electronic engineering information engineeringResource allocation (computer)Wirelessbusinesscomputerlangattomat verkotBuffer overflowComputer networkcomputer.programming_language

description

Wireless caching systems have been exhaustively investigated in recent years. Due to limited buffer capacity, and unbalanced arrival and service rates, the backlogs may exist in the caching node and even cause buffer overflow. In this paper, we first investigate the relationship among backlogs, buffer capacity, data arrival rate and service rate, utilizing the martingale theory which is flexible in handling any arrival and service processes. Then given a target buffer overflow probability, the minimal required buffer portion is determined. If the devoted buffer capacity can fulfill all serving users' minimal buffer requirements, an optimization problem is constructed with the objective to minimize the overall buffer overflow probability. The optimization solution is obtained by a modified waterfilling scheme. Finally, the numerical results are illustrated to demonstrate the superiority of the proposed scheme. peerReviewed

http://urn.fi/URN:NBN:fi:jyu-202001081103