Performance optimization scheme for parallel transmission coding cache
A caching and encoding technology, applied in the field of mobile communications, to achieve the effect of reducing the number of optimization iterations, improving algorithm performance, and reducing transmission time
Pending Publication Date: 2022-07-15
SOUTHEAST UNIV
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[0003] The purpose of the present invention is to provide a performance optimization scheme for parallel transmission coding cache, which considers two different transmission methods based on server multicast and D2D network, and proposes an evaluation index that is transmission time length, aiming at the problem of parallel transmission coding cache Performance optimization algorithm, and finally get a parallel transmission coding cache solution based on complex network model to solve the technical problem of coding cache in complex network model
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[0053] In order to better understand the purpose, structure and function of the present invention, a performance optimization scheme for parallel transmission coding and buffering of the present invention will be described in further detail below with reference to the accompanying drawings.
[0054] like figure 2 As shown, the present invention comprises the following steps:
[0055] Step 1, such as figure 1 As shown, the server, connects K users through an error-free broadcast channel. At the same time, a D2D communication network is formed between all users. N files are stored on the server side, W 1 ,...W N , each file has F bits. Each user has a cache space, and the size of the cache space is different for different users. For a given number of users K, number of database files N, and server broadcast channel capacity C s , D2D network channel capacity C u To solve the problem of encoding cache with different size of cache space for each user, it is known that the...
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The invention discloses a performance optimization scheme under a parallel transmission coding cache background. The scheme implementation process comprises the steps of determination of a parallel transmission coding cache scheme, modeling of a parallel transmission coding cache optimization problem and selection and implementation of an optimization algorithm. According to an independent server multicast model SMCC and a device-to-device (D2D) transmission model D2DCC, a coding cache model capable of parallel transmission is determined, then a coding cache problem based on the model is modeled as an optimization problem related to a file distribution strategy and a user cache space distribution strategy, the optimization target is to minimize transmission duration, and the transmission time is optimized. And the optimization problem is solved by applying an optimization algorithm based on a particle swarm algorithm and linear programming. According to the parallel coding caching scheme, the transmission time is shortened, the optimization iteration frequency is reduced through the optimization algorithm, and the algorithm performance is improved.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a performance optimization scheme for parallel transmission coding and buffering. Background technique [0002] In the encoding caching problem proposed to alleviate the network transmission pressure as much as possible, most works reduce the communication delay by creating multicast opportunities in the pre-cache phase and transmission phase. Most of the current research focuses on server multicast-based models or encoding caching problems in other network structures. Among them, the organization type of multiple users, the size of the cache space of multiple users, etc. are all factors that can be changed in the network model. In order to evaluate the pros and cons of the entire coded buffer communication system, most works take the communication delay as the evaluation index. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is...
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IPC IPC(8): H04W4/06H04W28/06
CPCH04W4/06H04W28/065
Inventor 刘楠林霄康维
Owner SOUTHEAST UNIV