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Base station and D2S common cache method oriented to wireless heterogeneous network

A wireless heterogeneous network and D2D technology, which is applied in the joint caching field of base stations and D2D for wireless heterogeneous networks, can solve the problems of backhaul link burden, traffic load occupied by popular data, redundancy, etc., to reduce load and improve cache Hit rate, the effect of reducing system traffic

Active Publication Date: 2018-09-14
XI AN JIAOTONG UNIV
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Problems solved by technology

Among the large amount of mobile Internet data, a small amount of popular data occupies a huge traffic load, and the transmission of these popular content has great redundancy, which brings a great burden to the backhaul link

Method used

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  • Base station and D2S common cache method oriented to wireless heterogeneous network
  • Base station and D2S common cache method oriented to wireless heterogeneous network
  • Base station and D2S common cache method oriented to wireless heterogeneous network

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0039] see figure 1

[0040] The present invention proposes a wireless heterogeneous network-oriented base station and D2D joint caching method. By introducing D2D caching technology into the wireless network caching and optimizing the joint working scene of the two, the system load can be reduced and the mobility can be alleviated. The purpose of network backhaul link and base station load pressure, thereby improving user experience.

[0041] Build system model:

[0042] User U={u 1 , u 2 … u k} is distributed as a Poisson point process within the coverage area of ​​the base station, with a density of λ u , the quantity is k. where m users For the D2D service provider, the density is λ d , as a D2D cache service provider, pre-caches content and provides content sharing to surrounding users. The effective radius of D2D communication is d, so the set of users ...

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Abstract

The invention discloses a base station and D2S common cache method oriented to a wireless heterogeneous network. The method comprises the following steps: firstly establishing a system model for the common work of D2D cache and base station cache, and dividing users into two types: a D2D user and a base station user; preferentially acquiring a file from a neighbor D2D servant when the D2D user requests the file in a system, requesting the file from the base station if the corresponding file is unfound, wherein the base user directly requests the file from the base station; and turning to a core network to request for the file uncached by each of the base station and the D2D servant. For reducing the system traffic of a common work scene of the base station and the D2D, a cache content deciding method based on a simulated annealing method is designed. A simulation result shows that the system traffic can be effectively reduced through the method in comparison with the existing cache method, the base station load and the backhaul load are lowered, and the cache hit rate is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless network buffering, and in particular relates to a base station and D2D common buffering method for wireless heterogeneous networks. Background technique [0002] In recent years, with the development of smart phones, the traffic load of wireless cellular networks has shown an exponential increase, which has brought huge pressure to mobile communication networks. Among the large amount of mobile Internet data, a small amount of popular data occupies a huge traffic load, and the transmission of these popular content has great redundancy, which brings a great burden to the backhaul link. With the development of big data analysis technology, the prediction of popular content has become possible. And a lot of side information from social networks can also help us understand the user's daily mobile characteristics, social characteristics, preference characteristics, etc. The development of cloud comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/14H04W4/70
CPCH04W28/14H04W4/70
Inventor 任品毅张晨曦杜清河
Owner XI AN JIAOTONG UNIV
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