Hybrid caching method based on base station cooperation in heterogeneous cellular network
A technology of cellular network and base station cooperation, applied in the field of communication, can solve the problems of data traffic wireless network overload, transmission resources cannot meet users and other problems, and achieve the effect of reducing energy consumption, improving performance, and reducing energy consumption
Active Publication Date: 2021-10-01
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
The explosive growth of data traffic has caused the existing wireless network to be overloaded. The limited transmission resources cannot meet the rapidly increasing content requests of users. In addition, the repeated transmission of content puts forward higher requirements on the capacity of the backhaul link. This requirement has also become The main bottleneck for operators to reduce costs and increase revenue
Method used
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[0028] Below in conjunction with embodiment and accompanying drawing, the technical solution of the invention is described in detail:
[0029] In the hybrid caching method based on base station cooperation in the heterogeneous cellular network described in the present invention, the process is as follows figure 1 As shown, it specifically includes the following steps:
[0030] 1) In the cache placement stage, the macro base station uses the most popular file cache strategy to cache files, and the small base station uses an equal-probability random cache strategy to cache files other than the macro base station cache;
[0031] 2) Obtain the authorization status of the target user. If the target user is an unauthorized user and the network cannot provide services for it, then end the process; if the target user is an authorized user of a macro base station, go to step 3); if the target user is a small base station Authorized user, then go to step 4);
[0032] 3) The steps for ...
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The invention discloses a hybrid caching method based on base station cooperation, which aims at solving the problem that a closed access user obtains a request file in a heterogeneous cellular network scene, and simultaneously considers a cooperative caching strategy and a hybrid caching strategy between base stations. The method comprises the following steps of: on the premise of meeting a user request, adopting a most popular file caching strategy on a macro base station layer, and adopting an equal probability random caching strategy on secondary popular files except macro base station cache on a small base station layer. When a small base station user sends a file request, the user searches a request file from the cache of the access small base station, the cache of the local macro base station and the cache of the cooperative small base station in sequence; when a macro base station user sends a request, the user searches a request file from the cache accessed to the macro base station and the cache of the cooperative small base station in sequence. According to the method, the cache hit rate of the user is effectively improved, the flow load of a core network is reduced, and the energy consumption of the system service user is reduced.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to a hybrid caching method based on cooperation of base stations in a heterogeneous cellular network. Background technique [0002] In recent years, people's demand for wireless communication services has changed from traditional connection-oriented services to content-oriented services, which has also led to an exponential increase in mobile data traffic. The explosive growth of data traffic has caused the existing wireless network to be overloaded. The limited transmission resources cannot meet the rapidly increasing content requests of users. In addition, the repeated transmission of content puts forward higher requirements on the capacity of the backhaul link. This requirement has also become The main bottleneck for operators to reduce costs and increase revenue. In order to solve the above problems, the edge cache technology has received widespread attention. It can store ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H04W28/14
CPCH04W28/14Y02D30/70
Inventor 朱琦张骏
Owner NANJING UNIV OF POSTS & TELECOMM