D2D Random Buffer Layout Method for Different User Preferences
A random distribution and caching technology, applied in location-based services, machine-to-machine/machine-type communication services, broadcast service distribution, etc., can solve problems such as violations, wireless signal channel fading, and large signaling overhead of cellular base stations , to achieve the effect of simplifying the participation
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[0023] A random cache layout method in a D2D content distribution system oriented to different preferences, see the system model figure 1 , the content distribution system has F pieces of content W of the same size to be cached f , f=1,2,...,F, f is the ordinal number of the content to be cached, and is composed of multiple content cache users randomly distributed at locations and multiple content request users randomly distributed at locations, where the locations of content cache users obey The node density is λ s Homogeneous Poisson Point Process (HPPP), the so-called node density refers to the average number of users per unit area, and the content caching users can cache C at most s In addition, according to the different preferences of the content requesting users for the same content, the content requesting users are divided into M content requesting groups G with different user preferences m , m is the serial number of the content request group and m=1,2,...,M, each c...
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