Internet protocol quadrature amplitude modulation (IPQAM) frequency point distribution and recovery method based on cache model
An allocation method and frequency point technology, applied in selective content distribution, image communication, electrical components, etc., can solve problems such as system memory waste, reducing search rate, affecting system concurrent response rate, etc.
Inactive Publication Date: 2013-06-05
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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Problems solved by technology
It can be seen that too many traversal searches will reduce the search rate and affect the concurrent response rate of the system
Besides, the traditional figure 1 The caching method usually loads all the field attributes in the database data model into the memory at the same time, and many of the field attributes will not change with the resource allocation and recovery process, thus causing a waste of system memory
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[0030] The present invention will be described in detail, clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] The embodiments of the present invention are described in more detail below, so that those skilled in the art can better understand the principles and implementation details thereof.
[0032] image 3 For the applicable implementation system environment of the method proposed by the present invention, its system interaction process can be described as follows:
[0033] The frequency point allocation process is as follows: the terminal set-top box applies for program streams from the session m...
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The invention relates to an internet protocol quadrature amplitude modulation (IPQAM) frequency point distribution and recovery method based on a cache model. The cache model comprises arrays of service groups. Array indexes are in one-to-one correspondence with identifications of the service groups. Array elements are structural bodies of the service groups. Each structural body of the service groups comprises a frequency point array formed by frequency points in the service group and a frequency point sequencing chain table. Elements of a frequency point array are frequency point structural bodies. Each frequency point structural body comprises a port state array, an available port chain table and available bandwidth information. Node data in the frequency point sequencing chain tables are in one-to-one correspondence with the array indexes of the frequency points. The frequency point sequencing chain tables are sequenced according to the corresponding frequency points in an orderly mode. Through adoption of the IPQAM frequency point distribution and recovery method based on the cache model, consumption of the cache model to a random-access memory is low. Consequently, the frequency points can be quickly located, and are distributed and recovered in distribution priority mode.
Description
technical field [0001] The invention relates to the field of digital TV frequency point management, in particular to a method for allocating and recovering IPQAM frequency points of an edge modulator based on a cache model. Background technique [0002] In the digital TV interactive service, the program session request initiated by the set-top box terminal includes service group identification information and the requested program number. The ID is used as a request parameter for requesting IPQAM frequency resources. Therefore, the service system needs to allocate IPQAM frequency resources according to information such as service group ID and required bandwidth in the request parameters, and allocate a unique resource allocation ID for the session. When When a terminal initiates a program resource reclamation request, the service system reclaims the allocated frequency resources according to the resource allocation identifier. [0003] In order to improve the concurrency ra...
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Inventor 刘磊鞠照明郑艳伟彭飞
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI